./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/condn.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/condn.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro --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 d395fadb914a95d9511046d910130b84077290c26c4e0d02bd3863b898526b50 --- 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-8393723 [2022-11-18 20:35:55,341 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:35:55,343 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:35:55,370 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:35:55,371 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:35:55,374 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:35:55,377 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:35:55,382 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:35:55,384 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:35:55,390 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:35:55,392 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:35:55,394 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:35:55,394 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:35:55,398 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:35:55,399 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:35:55,401 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:35:55,404 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:35:55,405 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:35:55,407 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:35:55,417 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:35:55,418 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:35:55,420 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:35:55,421 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:35:55,422 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:35:55,431 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:35:55,432 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:35:55,432 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:35:55,434 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:35:55,435 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:35:55,436 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:35:55,437 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:35:55,440 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:35:55,442 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:35:55,443 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:35:55,445 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:35:55,445 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:35:55,446 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:35:55,446 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:35:55,447 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:35:55,448 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:35:55,449 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:35:55,450 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 20:35:55,500 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:35:55,501 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:35:55,501 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:35:55,502 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:35:55,503 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:35:55,503 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:35:55,504 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:35:55,505 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:35:55,505 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:35:55,505 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:35:55,507 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:35:55,507 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:35:55,507 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:35:55,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:35:55,508 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:35:55,508 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:35:55,509 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:35:55,509 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:35:55,509 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:35:55,510 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:35:55,510 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:35:55,510 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:35:55,511 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:35:55,511 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:35:55,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:35:55,512 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:35:55,512 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:35:55,512 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:35:55,513 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:35:55,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:35:55,514 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:35:55,514 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:35:55,514 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:35:55,515 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_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d395fadb914a95d9511046d910130b84077290c26c4e0d02bd3863b898526b50 [2022-11-18 20:35:55,875 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:35:55,914 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:35:55,917 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:35:55,919 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:35:55,920 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:35:55,922 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/array-fpi/condn.c [2022-11-18 20:35:56,029 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/data/5679e979d/2111dff59cd94e8e9794d669eb486345/FLAG9f97ba9ee [2022-11-18 20:35:56,600 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:35:56,601 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/sv-benchmarks/c/array-fpi/condn.c [2022-11-18 20:35:56,610 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/data/5679e979d/2111dff59cd94e8e9794d669eb486345/FLAG9f97ba9ee [2022-11-18 20:35:56,981 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/data/5679e979d/2111dff59cd94e8e9794d669eb486345 [2022-11-18 20:35:56,985 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:35:56,987 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:35:56,993 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:35:56,993 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:35:56,997 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:35:56,998 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:35:56" (1/1) ... [2022-11-18 20:35:56,999 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5545ac66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:35:56, skipping insertion in model container [2022-11-18 20:35:56,999 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:35:56" (1/1) ... [2022-11-18 20:35:57,007 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:35:57,024 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:35:57,229 WARN L234 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_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/sv-benchmarks/c/array-fpi/condn.c[588,601] [2022-11-18 20:35:57,259 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:35:57,268 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:35:57,280 WARN L234 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_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/sv-benchmarks/c/array-fpi/condn.c[588,601] [2022-11-18 20:35:57,286 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:35:57,302 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:35:57,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:35:57 WrapperNode [2022-11-18 20:35:57,303 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:35:57,303 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:35:57,304 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:35:57,304 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:35:57,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:35:57" (1/1) ... [2022-11-18 20:35:57,316 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:35:57" (1/1) ... [2022-11-18 20:35:57,337 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 78 [2022-11-18 20:35:57,337 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:35:57,338 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:35:57,338 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:35:57,338 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:35:57,348 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:35:57" (1/1) ... [2022-11-18 20:35:57,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:35:57" (1/1) ... [2022-11-18 20:35:57,350 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:35:57" (1/1) ... [2022-11-18 20:35:57,351 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:35:57" (1/1) ... [2022-11-18 20:35:57,356 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:35:57" (1/1) ... [2022-11-18 20:35:57,361 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:35:57" (1/1) ... [2022-11-18 20:35:57,362 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:35:57" (1/1) ... [2022-11-18 20:35:57,363 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:35:57" (1/1) ... [2022-11-18 20:35:57,366 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:35:57,367 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:35:57,367 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:35:57,367 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:35:57,370 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:35:57" (1/1) ... [2022-11-18 20:35:57,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:35:57,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:35:57,409 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:35:57,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:35:57,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:35:57,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:35:57,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:35:57,461 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 20:35:57,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:35:57,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:35:57,461 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:35:57,562 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:35:57,565 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:35:57,822 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:35:57,828 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:35:57,828 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-18 20:35:57,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:35:57 BoogieIcfgContainer [2022-11-18 20:35:57,831 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:35:57,833 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:35:57,833 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:35:57,837 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:35:57,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:35:56" (1/3) ... [2022-11-18 20:35:57,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ba6806 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:35:57, skipping insertion in model container [2022-11-18 20:35:57,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:35:57" (2/3) ... [2022-11-18 20:35:57,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ba6806 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:35:57, skipping insertion in model container [2022-11-18 20:35:57,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:35:57" (3/3) ... [2022-11-18 20:35:57,847 INFO L112 eAbstractionObserver]: Analyzing ICFG condn.c [2022-11-18 20:35:57,872 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:35:57,872 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:35:57,926 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:35:57,934 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;@7ae2192d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:35:57,934 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 20:35:57,938 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:35:57,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 20:35:57,946 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:35:57,946 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:35:57,947 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:35:57,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:35:57,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1828392228, now seen corresponding path program 1 times [2022-11-18 20:35:57,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:35:57,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459737249] [2022-11-18 20:35:57,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:35:57,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:35:58,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:35:58,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:35:58,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:35:58,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459737249] [2022-11-18 20:35:58,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459737249] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:35:58,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:35:58,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:35:58,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186638994] [2022-11-18 20:35:58,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:35:58,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:35:58,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:35:58,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:35:58,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:35:58,287 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 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 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:35:58,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:35:58,317 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2022-11-18 20:35:58,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:35:58,320 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2022-11-18 20:35:58,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:35:58,342 INFO L225 Difference]: With dead ends: 40 [2022-11-18 20:35:58,343 INFO L226 Difference]: Without dead ends: 18 [2022-11-18 20:35:58,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:35:58,353 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:35:58,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:35:58,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-18 20:35:58,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-18 20:35:58,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:35:58,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-11-18 20:35:58,393 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2022-11-18 20:35:58,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:35:58,394 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-11-18 20:35:58,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:35:58,395 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-11-18 20:35:58,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 20:35:58,395 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:35:58,396 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:35:58,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:35:58,397 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:35:58,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:35:58,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1148333858, now seen corresponding path program 1 times [2022-11-18 20:35:58,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:35:58,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342388755] [2022-11-18 20:35:58,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:35:58,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:35:58,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:35:58,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:35:58,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:35:58,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342388755] [2022-11-18 20:35:58,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342388755] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:35:58,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:35:58,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:35:58,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429222187] [2022-11-18 20:35:58,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:35:58,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:35:58,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:35:58,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:35:58,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:35:58,626 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:35:58,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:35:58,741 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2022-11-18 20:35:58,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:35:58,742 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2022-11-18 20:35:58,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:35:58,743 INFO L225 Difference]: With dead ends: 40 [2022-11-18 20:35:58,744 INFO L226 Difference]: Without dead ends: 29 [2022-11-18 20:35:58,744 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 [2022-11-18 20:35:58,746 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:35:58,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 15 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:35:58,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-18 20:35:58,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2022-11-18 20:35:58,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:35:58,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-11-18 20:35:58,755 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2022-11-18 20:35:58,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:35:58,756 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-11-18 20:35:58,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:35:58,756 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-11-18 20:35:58,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-18 20:35:58,757 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:35:58,757 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:35:58,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:35:58,758 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:35:58,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:35:58,759 INFO L85 PathProgramCache]: Analyzing trace with hash -2142875084, now seen corresponding path program 1 times [2022-11-18 20:35:58,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:35:58,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792530662] [2022-11-18 20:35:58,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:35:58,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:35:58,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:35:59,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:35:59,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:35:59,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792530662] [2022-11-18 20:35:59,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792530662] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:35:59,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684978533] [2022-11-18 20:35:59,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:35:59,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:35:59,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:35:59,681 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:35:59,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:35:59,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:35:59,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 20:35:59,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:36:00,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 23 [2022-11-18 20:36:00,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-18 20:36:00,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:36:00,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:36:00,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-11-18 20:36:00,247 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-18 20:36:00,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 28 [2022-11-18 20:36:00,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:36:00,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684978533] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:36:00,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:36:00,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-11-18 20:36:00,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666793292] [2022-11-18 20:36:00,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:36:00,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:36:00,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:36:00,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:36:00,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:36:00,271 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:00,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:36:00,684 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2022-11-18 20:36:00,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 20:36:00,685 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-18 20:36:00,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:36:00,686 INFO L225 Difference]: With dead ends: 47 [2022-11-18 20:36:00,686 INFO L226 Difference]: Without dead ends: 45 [2022-11-18 20:36:00,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2022-11-18 20:36:00,688 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 82 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:36:00,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 69 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 121 Invalid, 0 Unknown, 28 Unchecked, 0.2s Time] [2022-11-18 20:36:00,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-18 20:36:00,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 22. [2022-11-18 20:36:00,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:00,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-11-18 20:36:00,697 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 17 [2022-11-18 20:36:00,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:36:00,698 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-11-18 20:36:00,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:00,698 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-11-18 20:36:00,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-18 20:36:00,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:36:00,699 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:36:00,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:36:00,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:00,913 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:36:00,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:36:00,914 INFO L85 PathProgramCache]: Analyzing trace with hash 2090341226, now seen corresponding path program 1 times [2022-11-18 20:36:00,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:36:00,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098364621] [2022-11-18 20:36:00,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:36:00,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:36:00,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:36:01,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:36:01,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:36:01,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098364621] [2022-11-18 20:36:01,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098364621] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:36:01,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835410407] [2022-11-18 20:36:01,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:36:01,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:01,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:36:01,100 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:36:01,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:36:01,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:36:01,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 20:36:01,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:36:01,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:36:01,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:36:01,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:36:01,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835410407] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:36:01,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:36:01,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-18 20:36:01,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606226966] [2022-11-18 20:36:01,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:36:01,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:36:01,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:36:01,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:36:01,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-18 20:36:01,377 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:01,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:36:01,523 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2022-11-18 20:36:01,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:36:01,524 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 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 21 [2022-11-18 20:36:01,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:36:01,526 INFO L225 Difference]: With dead ends: 62 [2022-11-18 20:36:01,526 INFO L226 Difference]: Without dead ends: 38 [2022-11-18 20:36:01,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-11-18 20:36:01,530 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 50 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:36:01,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 47 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:36:01,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-18 20:36:01,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2022-11-18 20:36:01,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:01,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-11-18 20:36:01,554 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2022-11-18 20:36:01,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:36:01,554 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-11-18 20:36:01,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:01,555 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-11-18 20:36:01,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-18 20:36:01,555 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:36:01,555 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:36:01,565 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-18 20:36:01,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:01,761 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:36:01,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:36:01,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1394926352, now seen corresponding path program 2 times [2022-11-18 20:36:01,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:36:01,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343610075] [2022-11-18 20:36:01,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:36:01,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:36:01,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:36:02,712 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:36:02,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:36:02,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343610075] [2022-11-18 20:36:02,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343610075] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:36:02,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743619492] [2022-11-18 20:36:02,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:36:02,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:02,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:36:02,722 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:36:02,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:36:02,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:36:02,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:36:02,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 20:36:02,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:36:02,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 24 [2022-11-18 20:36:03,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-18 20:36:03,041 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:36:03,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:36:03,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-18 20:36:03,211 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-18 20:36:03,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 28 [2022-11-18 20:36:03,265 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:36:03,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743619492] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:36:03,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:36:03,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 9] total 24 [2022-11-18 20:36:03,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360422139] [2022-11-18 20:36:03,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:36:03,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 20:36:03,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:36:03,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 20:36:03,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-11-18 20:36:03,272 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:04,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:36:04,155 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2022-11-18 20:36:04,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-18 20:36:04,156 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 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 26 [2022-11-18 20:36:04,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:36:04,157 INFO L225 Difference]: With dead ends: 61 [2022-11-18 20:36:04,157 INFO L226 Difference]: Without dead ends: 59 [2022-11-18 20:36:04,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=453, Invalid=1709, Unknown=0, NotChecked=0, Total=2162 [2022-11-18 20:36:04,159 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 183 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:36:04,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 85 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 294 Invalid, 0 Unknown, 41 Unchecked, 0.3s Time] [2022-11-18 20:36:04,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-18 20:36:04,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2022-11-18 20:36:04,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:04,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-11-18 20:36:04,172 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 26 [2022-11-18 20:36:04,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:36:04,173 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-11-18 20:36:04,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:04,174 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-11-18 20:36:04,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-18 20:36:04,176 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:36:04,176 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:36:04,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:36:04,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:04,382 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:36:04,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:36:04,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1446324666, now seen corresponding path program 3 times [2022-11-18 20:36:04,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:36:04,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888768873] [2022-11-18 20:36:04,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:36:04,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:36:04,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:36:04,590 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:36:04,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:36:04,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888768873] [2022-11-18 20:36:04,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888768873] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:36:04,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640001854] [2022-11-18 20:36:04,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:36:04,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:04,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:36:04,592 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:36:04,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:36:04,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 20:36:04,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:36:04,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:36:04,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:36:04,805 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:36:04,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:36:04,902 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:36:04,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640001854] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:36:04,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:36:04,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-18 20:36:04,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356991950] [2022-11-18 20:36:04,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:36:04,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:36:04,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:36:04,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:36:04,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:36:04,906 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:05,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:36:05,103 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2022-11-18 20:36:05,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:36:05,104 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 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 30 [2022-11-18 20:36:05,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:36:05,108 INFO L225 Difference]: With dead ends: 82 [2022-11-18 20:36:05,109 INFO L226 Difference]: Without dead ends: 47 [2022-11-18 20:36:05,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:36:05,111 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 71 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:36:05,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 74 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:36:05,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-18 20:36:05,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2022-11-18 20:36:05,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:05,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-11-18 20:36:05,136 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 30 [2022-11-18 20:36:05,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:36:05,137 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-11-18 20:36:05,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:05,139 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-11-18 20:36:05,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-18 20:36:05,141 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:36:05,141 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:36:05,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:36:05,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-18 20:36:05,347 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:36:05,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:36:05,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1754360412, now seen corresponding path program 4 times [2022-11-18 20:36:05,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:36:05,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928016389] [2022-11-18 20:36:05,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:36:05,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:36:05,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:36:06,352 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:36:06,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:36:06,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928016389] [2022-11-18 20:36:06,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928016389] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:36:06,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256865737] [2022-11-18 20:36:06,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:36:06,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:06,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:36:06,355 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:36:06,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:36:06,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:36:06,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:36:06,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 20:36:06,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:36:06,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-11-18 20:36:06,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-11-18 20:36:06,716 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:36:06,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:36:06,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-18 20:36:06,915 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-18 20:36:06,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 28 [2022-11-18 20:36:06,945 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:36:06,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256865737] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:36:06,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:36:06,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 11] total 32 [2022-11-18 20:36:06,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170330912] [2022-11-18 20:36:06,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:36:06,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-18 20:36:06,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:36:06,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-18 20:36:06,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2022-11-18 20:36:06,948 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 32 states, 32 states have (on average 2.34375) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:08,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:36:08,327 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2022-11-18 20:36:08,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-18 20:36:08,328 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 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 35 [2022-11-18 20:36:08,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:36:08,329 INFO L225 Difference]: With dead ends: 75 [2022-11-18 20:36:08,329 INFO L226 Difference]: Without dead ends: 73 [2022-11-18 20:36:08,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=605, Invalid=3177, Unknown=0, NotChecked=0, Total=3782 [2022-11-18 20:36:08,332 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 261 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:36:08,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 138 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 466 Invalid, 0 Unknown, 43 Unchecked, 0.5s Time] [2022-11-18 20:36:08,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-18 20:36:08,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 40. [2022-11-18 20:36:08,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:08,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2022-11-18 20:36:08,342 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 35 [2022-11-18 20:36:08,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:36:08,343 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2022-11-18 20:36:08,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:08,343 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2022-11-18 20:36:08,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-18 20:36:08,344 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:36:08,345 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:36:08,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:36:08,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:08,550 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:36:08,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:36:08,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1980833498, now seen corresponding path program 5 times [2022-11-18 20:36:08,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:36:08,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136566272] [2022-11-18 20:36:08,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:36:08,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:36:08,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:36:08,725 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 20:36:08,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:36:08,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136566272] [2022-11-18 20:36:08,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136566272] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:36:08,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453990028] [2022-11-18 20:36:08,726 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:36:08,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:08,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:36:08,728 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:36:08,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:36:08,864 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-18 20:36:08,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:36:08,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 20:36:08,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:36:09,011 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:36:09,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:36:09,116 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:36:09,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453990028] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:36:09,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:36:09,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-11-18 20:36:09,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688242358] [2022-11-18 20:36:09,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:36:09,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 20:36:09,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:36:09,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 20:36:09,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:36:09,118 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:09,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:36:09,332 INFO L93 Difference]: Finished difference Result 102 states and 117 transitions. [2022-11-18 20:36:09,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 20:36:09,332 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 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 39 [2022-11-18 20:36:09,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:36:09,333 INFO L225 Difference]: With dead ends: 102 [2022-11-18 20:36:09,333 INFO L226 Difference]: Without dead ends: 56 [2022-11-18 20:36:09,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 65 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2022-11-18 20:36:09,334 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 135 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:36:09,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 56 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:36:09,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-18 20:36:09,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 45. [2022-11-18 20:36:09,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:09,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2022-11-18 20:36:09,344 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 39 [2022-11-18 20:36:09,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:36:09,344 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2022-11-18 20:36:09,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:09,344 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2022-11-18 20:36:09,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-18 20:36:09,345 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:36:09,345 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:36:09,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:36:09,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:09,563 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:36:09,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:36:09,564 INFO L85 PathProgramCache]: Analyzing trace with hash -249765768, now seen corresponding path program 6 times [2022-11-18 20:36:09,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:36:09,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873710442] [2022-11-18 20:36:09,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:36:09,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:36:09,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:36:10,453 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:36:10,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:36:10,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873710442] [2022-11-18 20:36:10,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873710442] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:36:10,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92224660] [2022-11-18 20:36:10,453 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:36:10,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:10,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:36:10,455 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:36:10,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:36:10,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-18 20:36:10,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:36:10,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-18 20:36:10,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:36:10,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-11-18 20:36:11,496 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-18 20:36:11,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-11-18 20:36:11,536 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-18 20:36:11,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:36:12,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 62 [2022-11-18 20:36:12,305 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-18 20:36:12,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 62 [2022-11-18 20:36:12,396 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 11 proven. 29 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-18 20:36:12,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92224660] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:36:12,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:36:12,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 16] total 43 [2022-11-18 20:36:12,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590431076] [2022-11-18 20:36:12,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:36:12,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-18 20:36:12,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:36:12,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-18 20:36:12,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1539, Unknown=0, NotChecked=0, Total=1806 [2022-11-18 20:36:12,400 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:13,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:36:13,906 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2022-11-18 20:36:13,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-18 20:36:13,907 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 0 states have call successors, (0), 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 44 [2022-11-18 20:36:13,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:36:13,908 INFO L225 Difference]: With dead ends: 76 [2022-11-18 20:36:13,908 INFO L226 Difference]: Without dead ends: 56 [2022-11-18 20:36:13,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 67 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1773 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=792, Invalid=4758, Unknown=0, NotChecked=0, Total=5550 [2022-11-18 20:36:13,912 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 88 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:36:13,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 152 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 184 Invalid, 0 Unknown, 165 Unchecked, 0.2s Time] [2022-11-18 20:36:13,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-18 20:36:13,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 48. [2022-11-18 20:36:13,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 47 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:13,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-11-18 20:36:13,923 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 44 [2022-11-18 20:36:13,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:36:13,924 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-11-18 20:36:13,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:13,925 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-11-18 20:36:13,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-18 20:36:13,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:36:13,928 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:36:13,940 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-18 20:36:14,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-18 20:36:14,135 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:36:14,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:36:14,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1938709510, now seen corresponding path program 1 times [2022-11-18 20:36:14,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:36:14,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402810058] [2022-11-18 20:36:14,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:36:14,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:36:14,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:36:14,923 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:36:14,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:36:14,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402810058] [2022-11-18 20:36:14,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402810058] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:36:14,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552834844] [2022-11-18 20:36:14,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:36:14,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:14,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:36:14,925 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:36:14,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:36:15,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:36:15,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-18 20:36:15,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:36:15,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-18 20:36:15,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 20:36:15,350 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:36:15,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:36:15,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-18 20:36:15,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-11-18 20:36:15,613 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-18 20:36:15,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552834844] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:36:15,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:36:15,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13, 12] total 33 [2022-11-18 20:36:15,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319737952] [2022-11-18 20:36:15,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:36:15,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-18 20:36:15,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:36:15,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-18 20:36:15,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2022-11-18 20:36:15,615 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 33 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:16,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:36:16,968 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2022-11-18 20:36:16,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-18 20:36:16,969 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 33 states have internal predecessors, (100), 0 states have call successors, (0), 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 44 [2022-11-18 20:36:16,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:36:16,970 INFO L225 Difference]: With dead ends: 92 [2022-11-18 20:36:16,970 INFO L226 Difference]: Without dead ends: 90 [2022-11-18 20:36:16,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=624, Invalid=3408, Unknown=0, NotChecked=0, Total=4032 [2022-11-18 20:36:16,972 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 299 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:36:16,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 234 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 20:36:16,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-18 20:36:16,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 56. [2022-11-18 20:36:16,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 55 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:16,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2022-11-18 20:36:16,985 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 44 [2022-11-18 20:36:16,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:36:16,986 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2022-11-18 20:36:16,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 33 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:16,986 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2022-11-18 20:36:16,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-18 20:36:16,987 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:36:16,987 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:36:16,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:36:17,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 20:36:17,196 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:36:17,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:36:17,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1288199652, now seen corresponding path program 7 times [2022-11-18 20:36:17,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:36:17,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769673116] [2022-11-18 20:36:17,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:36:17,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:36:17,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:36:17,422 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-18 20:36:17,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:36:17,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769673116] [2022-11-18 20:36:17,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769673116] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:36:17,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384233827] [2022-11-18 20:36:17,423 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:36:17,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:17,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:36:17,424 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:36:17,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:36:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:36:17,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 20:36:17,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:36:17,692 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-18 20:36:17,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:36:17,814 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-18 20:36:17,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384233827] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:36:17,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:36:17,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-11-18 20:36:17,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990495320] [2022-11-18 20:36:17,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:36:17,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 20:36:17,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:36:17,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 20:36:17,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:36:17,818 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:18,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:36:18,120 INFO L93 Difference]: Finished difference Result 152 states and 174 transitions. [2022-11-18 20:36:18,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 20:36:18,121 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 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 47 [2022-11-18 20:36:18,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:36:18,123 INFO L225 Difference]: With dead ends: 152 [2022-11-18 20:36:18,123 INFO L226 Difference]: Without dead ends: 89 [2022-11-18 20:36:18,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 77 SyntacticMatches, 10 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2022-11-18 20:36:18,126 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 161 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:36:18,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 91 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:36:18,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-18 20:36:18,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 60. [2022-11-18 20:36:18,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 59 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:18,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2022-11-18 20:36:18,151 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 47 [2022-11-18 20:36:18,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:36:18,151 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2022-11-18 20:36:18,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:18,152 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2022-11-18 20:36:18,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-18 20:36:18,158 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:36:18,158 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:36:18,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:36:18,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 20:36:18,364 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:36:18,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:36:18,365 INFO L85 PathProgramCache]: Analyzing trace with hash 534659294, now seen corresponding path program 8 times [2022-11-18 20:36:18,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:36:18,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835046075] [2022-11-18 20:36:18,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:36:18,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:36:18,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:36:19,563 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:36:19,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:36:19,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835046075] [2022-11-18 20:36:19,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835046075] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:36:19,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913651898] [2022-11-18 20:36:19,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:36:19,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:19,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:36:19,566 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:36:19,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 20:36:19,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:36:19,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:36:19,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-18 20:36:19,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:36:19,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-11-18 20:36:19,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:36:19,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 32 [2022-11-18 20:36:20,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-18 20:36:20,117 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:36:20,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:36:24,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2022-11-18 20:36:24,573 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-18 20:36:24,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 66 [2022-11-18 20:36:24,727 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-18 20:36:24,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913651898] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:36:24,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:36:24,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 30 [2022-11-18 20:36:24,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494353228] [2022-11-18 20:36:24,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:36:24,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-18 20:36:24,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:36:24,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-18 20:36:24,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=749, Unknown=4, NotChecked=0, Total=870 [2022-11-18 20:36:24,730 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 30 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:26,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:36:26,758 INFO L93 Difference]: Finished difference Result 129 states and 141 transitions. [2022-11-18 20:36:26,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-18 20:36:26,759 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 30 states have internal predecessors, (92), 0 states have call successors, (0), 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 49 [2022-11-18 20:36:26,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:36:26,760 INFO L225 Difference]: With dead ends: 129 [2022-11-18 20:36:26,760 INFO L226 Difference]: Without dead ends: 127 [2022-11-18 20:36:26,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 89 SyntacticMatches, 7 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=505, Invalid=3273, Unknown=4, NotChecked=0, Total=3782 [2022-11-18 20:36:26,762 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 247 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:36:26,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 263 Invalid, 992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 748 Invalid, 0 Unknown, 188 Unchecked, 0.5s Time] [2022-11-18 20:36:26,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-18 20:36:26,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 54. [2022-11-18 20:36:26,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.150943396226415) internal successors, (61), 53 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:26,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2022-11-18 20:36:26,792 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 49 [2022-11-18 20:36:26,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:36:26,792 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2022-11-18 20:36:26,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 30 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:26,793 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2022-11-18 20:36:26,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-18 20:36:26,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:36:26,795 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:36:26,804 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-18 20:36:27,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 20:36:27,000 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:36:27,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:36:27,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1679516396, now seen corresponding path program 9 times [2022-11-18 20:36:27,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:36:27,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734570052] [2022-11-18 20:36:27,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:36:27,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:36:27,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:36:28,318 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:36:28,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:36:28,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734570052] [2022-11-18 20:36:28,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734570052] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:36:28,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505594886] [2022-11-18 20:36:28,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:36:28,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:28,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:36:28,322 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:36:28,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 20:36:28,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-18 20:36:28,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:36:28,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-18 20:36:28,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:36:28,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-11-18 20:36:29,524 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-18 20:36:29,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-11-18 20:36:29,569 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 39 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-18 20:36:29,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:36:30,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 62 [2022-11-18 20:36:30,480 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-18 20:36:30,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 62 [2022-11-18 20:36:30,644 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 21 proven. 46 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-18 20:36:30,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505594886] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:36:30,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:36:30,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18, 18] total 50 [2022-11-18 20:36:30,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133651669] [2022-11-18 20:36:30,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:36:30,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-18 20:36:30,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:36:30,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-18 20:36:30,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=2156, Unknown=0, NotChecked=0, Total=2450 [2022-11-18 20:36:30,647 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 50 states, 50 states have (on average 2.3) internal successors, (115), 50 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:33,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:36:33,330 INFO L93 Difference]: Finished difference Result 91 states and 100 transitions. [2022-11-18 20:36:33,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-18 20:36:33,331 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.3) internal successors, (115), 50 states have internal predecessors, (115), 0 states have call successors, (0), 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 53 [2022-11-18 20:36:33,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:36:33,331 INFO L225 Difference]: With dead ends: 91 [2022-11-18 20:36:33,331 INFO L226 Difference]: Without dead ends: 67 [2022-11-18 20:36:33,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 84 SyntacticMatches, 6 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2152 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1030, Invalid=7342, Unknown=0, NotChecked=0, Total=8372 [2022-11-18 20:36:33,335 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 80 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:36:33,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 300 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 426 Invalid, 0 Unknown, 215 Unchecked, 0.4s Time] [2022-11-18 20:36:33,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-18 20:36:33,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 57. [2022-11-18 20:36:33,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 56 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:33,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2022-11-18 20:36:33,350 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 53 [2022-11-18 20:36:33,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:36:33,350 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2022-11-18 20:36:33,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.3) internal successors, (115), 50 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:33,351 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2022-11-18 20:36:33,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-18 20:36:33,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:36:33,351 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:36:33,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 20:36:33,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 20:36:33,557 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:36:33,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:36:33,558 INFO L85 PathProgramCache]: Analyzing trace with hash 810012566, now seen corresponding path program 2 times [2022-11-18 20:36:33,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:36:33,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324539021] [2022-11-18 20:36:33,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:36:33,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:36:33,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:36:34,557 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:36:34,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:36:34,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324539021] [2022-11-18 20:36:34,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324539021] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:36:34,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951844320] [2022-11-18 20:36:34,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:36:34,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:34,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:36:34,560 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:36:34,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 20:36:34,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:36:34,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:36:34,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-18 20:36:34,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:36:34,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-18 20:36:35,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 20:36:35,413 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:36:35,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:36:35,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-18 20:36:35,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-11-18 20:36:35,633 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-18 20:36:35,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951844320] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:36:35,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:36:35,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 15, 14] total 37 [2022-11-18 20:36:35,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340808390] [2022-11-18 20:36:35,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:36:35,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-18 20:36:35,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:36:35,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-18 20:36:35,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1176, Unknown=0, NotChecked=0, Total=1332 [2022-11-18 20:36:35,640 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand has 37 states, 37 states have (on average 3.4324324324324325) internal successors, (127), 37 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:37,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:36:37,463 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2022-11-18 20:36:37,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-18 20:36:37,463 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.4324324324324325) internal successors, (127), 37 states have internal predecessors, (127), 0 states have call successors, (0), 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 53 [2022-11-18 20:36:37,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:36:37,464 INFO L225 Difference]: With dead ends: 106 [2022-11-18 20:36:37,464 INFO L226 Difference]: Without dead ends: 104 [2022-11-18 20:36:37,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 92 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1490 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=759, Invalid=4791, Unknown=0, NotChecked=0, Total=5550 [2022-11-18 20:36:37,466 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 416 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:36:37,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 263 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1004 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 20:36:37,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-18 20:36:37,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 65. [2022-11-18 20:36:37,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.171875) internal successors, (75), 64 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:37,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2022-11-18 20:36:37,484 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 53 [2022-11-18 20:36:37,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:36:37,484 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2022-11-18 20:36:37,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.4324324324324325) internal successors, (127), 37 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:37,485 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2022-11-18 20:36:37,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-18 20:36:37,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:36:37,485 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:36:37,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 20:36:37,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 20:36:37,690 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:36:37,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:36:37,691 INFO L85 PathProgramCache]: Analyzing trace with hash -273043412, now seen corresponding path program 10 times [2022-11-18 20:36:37,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:36:37,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406721976] [2022-11-18 20:36:37,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:36:37,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:36:37,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:36:37,929 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 38 proven. 38 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-18 20:36:37,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:36:37,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406721976] [2022-11-18 20:36:37,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406721976] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:36:37,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896161667] [2022-11-18 20:36:37,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:36:37,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:37,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:36:37,932 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:36:37,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 20:36:38,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:36:38,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:36:38,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-18 20:36:38,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:36:38,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-11-18 20:36:38,193 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-18 20:36:38,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-11-18 20:36:38,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-11-18 20:36:38,425 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-18 20:36:38,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:36:41,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2022-11-18 20:36:41,246 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-18 20:36:41,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 66 [2022-11-18 20:36:41,333 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-18 20:36:41,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896161667] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:36:41,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:36:41,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 17] total 38 [2022-11-18 20:36:41,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16889758] [2022-11-18 20:36:41,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:36:41,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-18 20:36:41,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:36:41,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-18 20:36:41,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1228, Unknown=3, NotChecked=0, Total=1406 [2022-11-18 20:36:41,336 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 38 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:44,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:36:44,463 INFO L93 Difference]: Finished difference Result 176 states and 203 transitions. [2022-11-18 20:36:44,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-18 20:36:44,470 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 38 states have internal predecessors, (112), 0 states have call successors, (0), 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 56 [2022-11-18 20:36:44,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:36:44,472 INFO L225 Difference]: With dead ends: 176 [2022-11-18 20:36:44,472 INFO L226 Difference]: Without dead ends: 142 [2022-11-18 20:36:44,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 92 SyntacticMatches, 6 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2273 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=747, Invalid=6222, Unknown=3, NotChecked=0, Total=6972 [2022-11-18 20:36:44,478 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 239 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 1231 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 1555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 218 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:36:44,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 413 Invalid, 1555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1231 Invalid, 0 Unknown, 218 Unchecked, 0.8s Time] [2022-11-18 20:36:44,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-11-18 20:36:44,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 80. [2022-11-18 20:36:44,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.1772151898734178) internal successors, (93), 79 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:44,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2022-11-18 20:36:44,517 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 56 [2022-11-18 20:36:44,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:36:44,518 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2022-11-18 20:36:44,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 38 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:44,518 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2022-11-18 20:36:44,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-18 20:36:44,519 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:36:44,519 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:36:44,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 20:36:44,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:44,730 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:36:44,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:36:44,731 INFO L85 PathProgramCache]: Analyzing trace with hash 720900044, now seen corresponding path program 3 times [2022-11-18 20:36:44,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:36:44,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298905315] [2022-11-18 20:36:44,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:36:44,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:36:44,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:36:44,997 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 33 proven. 42 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-18 20:36:44,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:36:44,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298905315] [2022-11-18 20:36:44,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298905315] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:36:44,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205507771] [2022-11-18 20:36:44,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:36:44,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:44,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:36:44,999 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:36:45,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 20:36:45,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-18 20:36:45,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:36:45,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-18 20:36:45,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:36:45,412 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 50 proven. 35 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-18 20:36:45,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:36:45,599 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 50 proven. 35 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-18 20:36:45,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205507771] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:36:45,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:36:45,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-11-18 20:36:45,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669475192] [2022-11-18 20:36:45,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:36:45,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-18 20:36:45,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:36:45,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-18 20:36:45,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-11-18 20:36:45,602 INFO L87 Difference]: Start difference. First operand 80 states and 93 transitions. Second operand has 23 states, 23 states have (on average 4.086956521739131) internal successors, (94), 23 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:46,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:36:46,032 INFO L93 Difference]: Finished difference Result 122 states and 137 transitions. [2022-11-18 20:36:46,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 20:36:46,033 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.086956521739131) internal successors, (94), 23 states have internal predecessors, (94), 0 states have call successors, (0), 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 57 [2022-11-18 20:36:46,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:36:46,034 INFO L225 Difference]: With dead ends: 122 [2022-11-18 20:36:46,034 INFO L226 Difference]: Without dead ends: 76 [2022-11-18 20:36:46,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 95 SyntacticMatches, 12 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2022-11-18 20:36:46,035 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 177 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:36:46,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 102 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:36:46,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-18 20:36:46,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 63. [2022-11-18 20:36:46,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 62 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:46,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2022-11-18 20:36:46,063 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 57 [2022-11-18 20:36:46,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:36:46,063 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2022-11-18 20:36:46,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.086956521739131) internal successors, (94), 23 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:46,064 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2022-11-18 20:36:46,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-18 20:36:46,065 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:36:46,065 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:36:46,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 20:36:46,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 20:36:46,273 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:36:46,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:36:46,273 INFO L85 PathProgramCache]: Analyzing trace with hash 72917472, now seen corresponding path program 11 times [2022-11-18 20:36:46,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:36:46,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177967466] [2022-11-18 20:36:46,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:36:46,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:36:46,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:36:47,738 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:36:47,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:36:47,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177967466] [2022-11-18 20:36:47,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177967466] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:36:47,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525265892] [2022-11-18 20:36:47,739 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:36:47,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:47,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:36:47,742 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:36:47,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 20:36:48,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-11-18 20:36:48,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:36:48,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-18 20:36:48,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:36:48,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-11-18 20:36:49,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-18 20:36:49,295 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-18 20:36:49,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:36:49,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-18 20:36:49,920 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-18 20:36:49,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 28 [2022-11-18 20:36:49,989 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-18 20:36:49,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525265892] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:36:49,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:36:49,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 19, 18] total 53 [2022-11-18 20:36:49,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382416062] [2022-11-18 20:36:49,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:36:49,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-18 20:36:49,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:36:49,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-18 20:36:49,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=2508, Unknown=0, NotChecked=0, Total=2756 [2022-11-18 20:36:49,994 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 53 states, 53 states have (on average 2.9245283018867925) internal successors, (155), 53 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:54,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:36:54,598 INFO L93 Difference]: Finished difference Result 117 states and 129 transitions. [2022-11-18 20:36:54,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-18 20:36:54,598 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.9245283018867925) internal successors, (155), 53 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-11-18 20:36:54,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:36:54,599 INFO L225 Difference]: With dead ends: 117 [2022-11-18 20:36:54,600 INFO L226 Difference]: Without dead ends: 115 [2022-11-18 20:36:54,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3319 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1387, Invalid=10823, Unknown=0, NotChecked=0, Total=12210 [2022-11-18 20:36:54,604 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 526 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 1600 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 1795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:36:54,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 351 Invalid, 1795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1600 Invalid, 0 Unknown, 75 Unchecked, 1.3s Time] [2022-11-18 20:36:54,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-18 20:36:54,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 67. [2022-11-18 20:36:54,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1363636363636365) internal successors, (75), 66 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:54,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2022-11-18 20:36:54,629 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 62 [2022-11-18 20:36:54,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:36:54,630 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2022-11-18 20:36:54,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.9245283018867925) internal successors, (155), 53 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:54,631 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2022-11-18 20:36:54,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-18 20:36:54,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:36:54,632 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:36:54,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 20:36:54,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 20:36:54,840 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:36:54,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:36:54,840 INFO L85 PathProgramCache]: Analyzing trace with hash 174238998, now seen corresponding path program 12 times [2022-11-18 20:36:54,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:36:54,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867869179] [2022-11-18 20:36:54,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:36:54,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:36:54,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:36:55,221 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 51 proven. 57 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-18 20:36:55,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:36:55,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867869179] [2022-11-18 20:36:55,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867869179] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:36:55,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229138028] [2022-11-18 20:36:55,222 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:36:55,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:55,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:36:55,224 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:36:55,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 20:36:55,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-18 20:36:55,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:36:55,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 20:36:55,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:36:56,000 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 72 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-18 20:36:56,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:36:56,276 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 72 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-18 20:36:56,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229138028] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:36:56,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:36:56,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2022-11-18 20:36:56,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200227620] [2022-11-18 20:36:56,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:36:56,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-18 20:36:56,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:36:56,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-18 20:36:56,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2022-11-18 20:36:56,279 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:56,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:36:56,804 INFO L93 Difference]: Finished difference Result 162 states and 183 transitions. [2022-11-18 20:36:56,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 20:36:56,805 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 0 states have call successors, (0), 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 66 [2022-11-18 20:36:56,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:36:56,806 INFO L225 Difference]: With dead ends: 162 [2022-11-18 20:36:56,806 INFO L226 Difference]: Without dead ends: 83 [2022-11-18 20:36:56,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 110 SyntacticMatches, 14 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2022-11-18 20:36:56,812 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 246 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:36:56,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 117 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:36:56,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-18 20:36:56,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2022-11-18 20:36:56,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 71 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:56,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2022-11-18 20:36:56,842 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 66 [2022-11-18 20:36:56,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:36:56,842 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2022-11-18 20:36:56,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:36:56,843 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2022-11-18 20:36:56,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-18 20:36:56,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:36:56,844 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:36:56,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 20:36:57,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 20:36:57,053 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:36:57,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:36:57,053 INFO L85 PathProgramCache]: Analyzing trace with hash -695424892, now seen corresponding path program 13 times [2022-11-18 20:36:57,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:36:57,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309462038] [2022-11-18 20:36:57,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:36:57,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:36:57,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:36:59,098 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:36:59,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:36:59,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309462038] [2022-11-18 20:36:59,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309462038] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:36:59,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509639772] [2022-11-18 20:36:59,099 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:36:59,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:59,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:36:59,102 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:36:59,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 20:36:59,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:36:59,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-18 20:36:59,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:36:59,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-11-18 20:37:00,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-18 20:37:00,601 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:37:00,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:37:01,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-18 20:37:01,260 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-18 20:37:01,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 28 [2022-11-18 20:37:01,329 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-18 20:37:01,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509639772] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:37:01,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:37:01,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20, 19] total 52 [2022-11-18 20:37:01,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139889496] [2022-11-18 20:37:01,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:37:01,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-18 20:37:01,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:37:01,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-18 20:37:01,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=2441, Unknown=0, NotChecked=0, Total=2652 [2022-11-18 20:37:01,332 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand has 52 states, 52 states have (on average 3.576923076923077) internal successors, (186), 52 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:37:03,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:37:03,750 INFO L93 Difference]: Finished difference Result 131 states and 144 transitions. [2022-11-18 20:37:03,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-18 20:37:03,750 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.576923076923077) internal successors, (186), 52 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-18 20:37:03,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:37:03,751 INFO L225 Difference]: With dead ends: 131 [2022-11-18 20:37:03,751 INFO L226 Difference]: Without dead ends: 129 [2022-11-18 20:37:03,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1803 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=627, Invalid=6855, Unknown=0, NotChecked=0, Total=7482 [2022-11-18 20:37:03,753 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 236 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 2191 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 2340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:37:03,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 526 Invalid, 2340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2191 Invalid, 0 Unknown, 88 Unchecked, 1.2s Time] [2022-11-18 20:37:03,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-18 20:37:03,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 76. [2022-11-18 20:37:03,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.1333333333333333) internal successors, (85), 75 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:37:03,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2022-11-18 20:37:03,782 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 71 [2022-11-18 20:37:03,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:37:03,783 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2022-11-18 20:37:03,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.576923076923077) internal successors, (186), 52 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:37:03,783 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2022-11-18 20:37:03,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-18 20:37:03,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:37:03,784 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:37:03,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-18 20:37:03,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:37:03,985 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:37:03,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:37:03,985 INFO L85 PathProgramCache]: Analyzing trace with hash 2802106, now seen corresponding path program 14 times [2022-11-18 20:37:03,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:37:03,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897068534] [2022-11-18 20:37:03,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:37:03,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:37:04,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:37:04,320 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 73 proven. 74 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-18 20:37:04,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:37:04,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897068534] [2022-11-18 20:37:04,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897068534] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:37:04,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677433119] [2022-11-18 20:37:04,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:37:04,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:37:04,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:37:04,326 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:37:04,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 20:37:04,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:37:04,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:37:04,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 20:37:04,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:37:04,796 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 98 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-18 20:37:04,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:37:05,047 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 98 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-18 20:37:05,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677433119] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:37:05,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:37:05,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2022-11-18 20:37:05,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147070185] [2022-11-18 20:37:05,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:37:05,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-18 20:37:05,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:37:05,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-18 20:37:05,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2022-11-18 20:37:05,049 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:37:05,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:37:05,491 INFO L93 Difference]: Finished difference Result 182 states and 205 transitions. [2022-11-18 20:37:05,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 20:37:05,491 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 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 75 [2022-11-18 20:37:05,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:37:05,492 INFO L225 Difference]: With dead ends: 182 [2022-11-18 20:37:05,492 INFO L226 Difference]: Without dead ends: 92 [2022-11-18 20:37:05,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 124 SyntacticMatches, 16 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2022-11-18 20:37:05,494 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 236 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:37:05,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 154 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:37:05,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-18 20:37:05,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2022-11-18 20:37:05,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1375) internal successors, (91), 80 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:37:05,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2022-11-18 20:37:05,521 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 75 [2022-11-18 20:37:05,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:37:05,521 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2022-11-18 20:37:05,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 29 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:37:05,522 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2022-11-18 20:37:05,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-18 20:37:05,523 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:37:05,523 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:37:05,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-18 20:37:05,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:37:05,729 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:37:05,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:37:05,729 INFO L85 PathProgramCache]: Analyzing trace with hash 122414920, now seen corresponding path program 15 times [2022-11-18 20:37:05,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:37:05,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128690458] [2022-11-18 20:37:05,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:37:05,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:37:05,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:37:07,239 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:37:07,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:37:07,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128690458] [2022-11-18 20:37:07,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128690458] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:37:07,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83753587] [2022-11-18 20:37:07,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:37:07,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:37:07,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:37:07,241 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:37:07,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-18 20:37:07,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-18 20:37:07,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:37:07,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-18 20:37:07,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:37:08,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-11-18 20:37:09,468 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-18 20:37:09,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-11-18 20:37:09,518 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 111 proven. 73 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-18 20:37:09,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:37:11,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2022-11-18 20:37:11,012 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-18 20:37:11,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 37 [2022-11-18 20:37:11,343 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 80 proven. 104 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-18 20:37:11,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83753587] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:37:11,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:37:11,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 26, 26] total 70 [2022-11-18 20:37:11,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042400772] [2022-11-18 20:37:11,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:37:11,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-18 20:37:11,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:37:11,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-18 20:37:11,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=4267, Unknown=0, NotChecked=0, Total=4830 [2022-11-18 20:37:11,346 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand has 70 states, 70 states have (on average 2.442857142857143) internal successors, (171), 70 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:37:20,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:37:20,833 INFO L93 Difference]: Finished difference Result 241 states and 275 transitions. [2022-11-18 20:37:20,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-11-18 20:37:20,833 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.442857142857143) internal successors, (171), 70 states have internal predecessors, (171), 0 states have call successors, (0), 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 80 [2022-11-18 20:37:20,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:37:20,834 INFO L225 Difference]: With dead ends: 241 [2022-11-18 20:37:20,834 INFO L226 Difference]: Without dead ends: 144 [2022-11-18 20:37:20,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 119 SyntacticMatches, 16 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10865 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=3397, Invalid=31385, Unknown=0, NotChecked=0, Total=34782 [2022-11-18 20:37:20,839 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 344 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 1672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 886 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:37:20,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 589 Invalid, 1672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 638 Invalid, 0 Unknown, 886 Unchecked, 0.5s Time] [2022-11-18 20:37:20,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-11-18 20:37:20,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 110. [2022-11-18 20:37:20,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.1926605504587156) internal successors, (130), 109 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:37:20,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 130 transitions. [2022-11-18 20:37:20,872 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 130 transitions. Word has length 80 [2022-11-18 20:37:20,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:37:20,873 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 130 transitions. [2022-11-18 20:37:20,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.442857142857143) internal successors, (171), 70 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:37:20,873 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 130 transitions. [2022-11-18 20:37:20,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-18 20:37:20,874 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:37:20,874 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:37:20,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-18 20:37:21,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:37:21,081 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:37:21,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:37:21,082 INFO L85 PathProgramCache]: Analyzing trace with hash -721590582, now seen corresponding path program 4 times [2022-11-18 20:37:21,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:37:21,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563292039] [2022-11-18 20:37:21,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:37:21,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:37:21,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:37:22,528 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:37:22,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:37:22,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563292039] [2022-11-18 20:37:22,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563292039] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:37:22,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293364732] [2022-11-18 20:37:22,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:37:22,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:37:22,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:37:22,529 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:37:22,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-18 20:37:22,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:37:22,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:37:22,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-18 20:37:22,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:37:22,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 20:37:23,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-18 20:37:23,185 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-18 20:37:23,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:37:23,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-18 20:37:23,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-11-18 20:37:23,399 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-18 20:37:23,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293364732] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:37:23,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:37:23,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 20, 20] total 41 [2022-11-18 20:37:23,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928721147] [2022-11-18 20:37:23,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:37:23,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-18 20:37:23,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:37:23,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-18 20:37:23,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1474, Unknown=0, NotChecked=0, Total=1640 [2022-11-18 20:37:23,401 INFO L87 Difference]: Start difference. First operand 110 states and 130 transitions. Second operand has 41 states, 41 states have (on average 3.4634146341463414) internal successors, (142), 41 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:37:26,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:37:26,119 INFO L93 Difference]: Finished difference Result 177 states and 200 transitions. [2022-11-18 20:37:26,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-18 20:37:26,119 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.4634146341463414) internal successors, (142), 41 states have internal predecessors, (142), 0 states have call successors, (0), 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 80 [2022-11-18 20:37:26,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:37:26,120 INFO L225 Difference]: With dead ends: 177 [2022-11-18 20:37:26,120 INFO L226 Difference]: Without dead ends: 175 [2022-11-18 20:37:26,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 147 SyntacticMatches, 5 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2205 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=929, Invalid=7813, Unknown=0, NotChecked=0, Total=8742 [2022-11-18 20:37:26,122 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 425 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 2009 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 2111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:37:26,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [425 Valid, 488 Invalid, 2111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2009 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-18 20:37:26,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-18 20:37:26,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 121. [2022-11-18 20:37:26,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.2) internal successors, (144), 120 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:37:26,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 144 transitions. [2022-11-18 20:37:26,165 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 144 transitions. Word has length 80 [2022-11-18 20:37:26,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:37:26,166 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 144 transitions. [2022-11-18 20:37:26,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.4634146341463414) internal successors, (142), 41 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:37:26,166 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 144 transitions. [2022-11-18 20:37:26,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-18 20:37:26,167 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:37:26,167 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:37:26,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-18 20:37:26,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:37:26,367 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:37:26,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:37:26,368 INFO L85 PathProgramCache]: Analyzing trace with hash 79209854, now seen corresponding path program 5 times [2022-11-18 20:37:26,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:37:26,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450581308] [2022-11-18 20:37:26,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:37:26,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:37:26,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:37:26,752 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 95 proven. 86 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-18 20:37:26,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:37:26,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450581308] [2022-11-18 20:37:26,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450581308] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:37:26,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875532819] [2022-11-18 20:37:26,753 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:37:26,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:37:26,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:37:26,754 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:37:26,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-18 20:37:27,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-11-18 20:37:27,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:37:27,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 20:37:27,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:37:27,595 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 117 proven. 64 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-18 20:37:27,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:37:27,811 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 117 proven. 64 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-18 20:37:27,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875532819] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:37:27,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:37:27,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2022-11-18 20:37:27,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637884931] [2022-11-18 20:37:27,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:37:27,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-18 20:37:27,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:37:27,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-18 20:37:27,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2022-11-18 20:37:27,814 INFO L87 Difference]: Start difference. First operand 121 states and 144 transitions. Second operand has 32 states, 32 states have (on average 2.84375) internal successors, (91), 32 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:37:28,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:37:28,332 INFO L93 Difference]: Finished difference Result 274 states and 312 transitions. [2022-11-18 20:37:28,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-18 20:37:28,332 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.84375) internal successors, (91), 32 states have internal predecessors, (91), 0 states have call successors, (0), 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 [2022-11-18 20:37:28,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:37:28,333 INFO L225 Difference]: With dead ends: 274 [2022-11-18 20:37:28,333 INFO L226 Difference]: Without dead ends: 141 [2022-11-18 20:37:28,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 137 SyntacticMatches, 18 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=407, Invalid=1233, Unknown=0, NotChecked=0, Total=1640 [2022-11-18 20:37:28,334 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 388 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:37:28,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 187 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:37:28,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-18 20:37:28,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 96. [2022-11-18 20:37:28,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.1473684210526316) internal successors, (109), 95 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:37:28,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 109 transitions. [2022-11-18 20:37:28,373 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 109 transitions. Word has length 83 [2022-11-18 20:37:28,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:37:28,373 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 109 transitions. [2022-11-18 20:37:28,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.84375) internal successors, (91), 32 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:37:28,373 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 109 transitions. [2022-11-18 20:37:28,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-18 20:37:28,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:37:28,374 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:37:28,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-18 20:37:28,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:37:28,578 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:37:28,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:37:28,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1113918398, now seen corresponding path program 16 times [2022-11-18 20:37:28,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:37:28,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439032376] [2022-11-18 20:37:28,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:37:28,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:37:28,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:37:30,287 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 294 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:37:30,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:37:30,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439032376] [2022-11-18 20:37:30,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439032376] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:37:30,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117656378] [2022-11-18 20:37:30,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:37:30,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:37:30,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:37:30,289 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:37:30,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-18 20:37:30,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:37:30,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:37:30,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-18 20:37:30,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:37:30,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-11-18 20:37:30,696 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-18 20:37:30,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-11-18 20:37:31,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2022-11-18 20:37:31,153 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 215 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-18 20:37:31,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:37:38,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2022-11-18 20:37:38,956 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-18 20:37:38,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 66 [2022-11-18 20:37:39,070 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 213 refuted. 2 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-18 20:37:39,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117656378] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:37:39,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:37:39,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 23] total 44 [2022-11-18 20:37:39,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357541399] [2022-11-18 20:37:39,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:37:39,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-18 20:37:39,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:37:39,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-18 20:37:39,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1723, Unknown=3, NotChecked=0, Total=1892 [2022-11-18 20:37:39,073 INFO L87 Difference]: Start difference. First operand 96 states and 109 transitions. Second operand has 44 states, 44 states have (on average 3.522727272727273) internal successors, (155), 44 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:37:42,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:37:42,675 INFO L93 Difference]: Finished difference Result 239 states and 261 transitions. [2022-11-18 20:37:42,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-11-18 20:37:42,675 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.522727272727273) internal successors, (155), 44 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2022-11-18 20:37:42,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:37:42,677 INFO L225 Difference]: With dead ends: 239 [2022-11-18 20:37:42,677 INFO L226 Difference]: Without dead ends: 237 [2022-11-18 20:37:42,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 155 SyntacticMatches, 23 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2102 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=649, Invalid=7537, Unknown=4, NotChecked=0, Total=8190 [2022-11-18 20:37:42,678 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 240 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 1876 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 2359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 429 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:37:42,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 613 Invalid, 2359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1876 Invalid, 0 Unknown, 429 Unchecked, 1.1s Time] [2022-11-18 20:37:42,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-11-18 20:37:42,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 110. [2022-11-18 20:37:42,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.1743119266055047) internal successors, (128), 109 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:37:42,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 128 transitions. [2022-11-18 20:37:42,726 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 128 transitions. Word has length 85 [2022-11-18 20:37:42,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:37:42,726 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 128 transitions. [2022-11-18 20:37:42,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.522727272727273) internal successors, (155), 44 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:37:42,726 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 128 transitions. [2022-11-18 20:37:42,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-18 20:37:42,727 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:37:42,727 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:37:42,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-18 20:37:42,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:37:42,933 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:37:42,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:37:42,933 INFO L85 PathProgramCache]: Analyzing trace with hash 269912896, now seen corresponding path program 6 times [2022-11-18 20:37:42,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:37:42,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068744852] [2022-11-18 20:37:42,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:37:42,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:37:43,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:37:44,788 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:37:44,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:37:44,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068744852] [2022-11-18 20:37:44,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068744852] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:37:44,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686996013] [2022-11-18 20:37:44,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:37:44,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:37:44,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:37:44,790 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:37:44,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-18 20:37:45,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-11-18 20:37:45,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:37:45,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-18 20:37:45,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:37:46,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-11-18 20:37:46,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-18 20:37:48,190 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:37:48,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 40 [2022-11-18 20:37:48,276 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 135 proven. 91 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-18 20:37:48,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:37:50,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 48 [2022-11-18 20:37:50,255 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-18 20:37:50,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 91 [2022-11-18 20:37:50,735 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 78 proven. 148 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-18 20:37:50,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686996013] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:37:50,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:37:50,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 30, 30] total 80 [2022-11-18 20:37:50,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721482632] [2022-11-18 20:37:50,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:37:50,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-11-18 20:37:50,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:37:50,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-11-18 20:37:50,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=755, Invalid=5565, Unknown=0, NotChecked=0, Total=6320 [2022-11-18 20:37:50,738 INFO L87 Difference]: Start difference. First operand 110 states and 128 transitions. Second operand has 80 states, 80 states have (on average 2.3) internal successors, (184), 80 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:03,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:38:03,660 INFO L93 Difference]: Finished difference Result 388 states and 444 transitions. [2022-11-18 20:38:03,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2022-11-18 20:38:03,660 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.3) internal successors, (184), 80 states have internal predecessors, (184), 0 states have call successors, (0), 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 85 [2022-11-18 20:38:03,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:38:03,662 INFO L225 Difference]: With dead ends: 388 [2022-11-18 20:38:03,662 INFO L226 Difference]: Without dead ends: 229 [2022-11-18 20:38:03,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 150 SyntacticMatches, 15 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16589 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=5598, Invalid=45704, Unknown=0, NotChecked=0, Total=51302 [2022-11-18 20:38:03,670 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 506 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 1323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 398 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:38:03,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 685 Invalid, 1323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 684 Invalid, 0 Unknown, 398 Unchecked, 0.6s Time] [2022-11-18 20:38:03,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-11-18 20:38:03,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 174. [2022-11-18 20:38:03,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.2427745664739884) internal successors, (215), 173 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:03,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 215 transitions. [2022-11-18 20:38:03,733 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 215 transitions. Word has length 85 [2022-11-18 20:38:03,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:38:03,734 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 215 transitions. [2022-11-18 20:38:03,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.3) internal successors, (184), 80 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:03,734 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 215 transitions. [2022-11-18 20:38:03,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-18 20:38:03,735 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:38:03,735 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:38:03,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-18 20:38:03,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-18 20:38:03,943 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:38:03,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:38:03,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1288557826, now seen corresponding path program 7 times [2022-11-18 20:38:03,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:38:03,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479680340] [2022-11-18 20:38:03,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:38:03,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:38:03,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:05,570 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:38:05,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:38:05,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479680340] [2022-11-18 20:38:05,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479680340] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:38:05,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632113244] [2022-11-18 20:38:05,571 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:38:05,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:38:05,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:38:05,572 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:38:05,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-18 20:38:05,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:38:05,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-18 20:38:05,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:38:06,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 20:38:06,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:38:06,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-18 20:38:06,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:38:06,380 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:38:06,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 32 [2022-11-18 20:38:06,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:38:06,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:38:06,531 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:38:06,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-11-18 20:38:07,457 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:38:07,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2022-11-18 20:38:07,510 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 292 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:38:07,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:38:12,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 97 [2022-11-18 20:38:12,595 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-18 20:38:12,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1426 treesize of output 1179 [2022-11-18 20:38:14,040 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 2 proven. 213 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-18 20:38:14,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632113244] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:38:14,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:38:14,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 26, 26] total 81 [2022-11-18 20:38:14,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095333487] [2022-11-18 20:38:14,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:38:14,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-11-18 20:38:14,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:38:14,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-11-18 20:38:14,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=5999, Unknown=2, NotChecked=0, Total=6480 [2022-11-18 20:38:14,042 INFO L87 Difference]: Start difference. First operand 174 states and 215 transitions. Second operand has 81 states, 81 states have (on average 2.7901234567901234) internal successors, (226), 81 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:38:23,666 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse7 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse5 (+ 2 |c_ULTIMATE.start_main_~i~0#1|)) (.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (+ .cse7 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse2 (+ 28 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse3 (+ c_~N~0 1))) (and (or (not (< |c_ULTIMATE.start_main_#t~mem9#1| c_~N~0)) (forall ((|v_ULTIMATE.start_main_~i~0#1_586| Int) (v_ArrVal_1163 Int) (v_ArrVal_1166 Int)) (or (< (select (store (store .cse0 .cse1 v_ArrVal_1163) (+ (* |v_ULTIMATE.start_main_~i~0#1_586| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1166) .cse2) .cse3) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_586|)) (not (<= v_ArrVal_1163 (select .cse0 .cse1)))))) (let ((.cse4 (+ .cse7 |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse6 (select .cse0 .cse4))) (or (forall ((v_ArrVal_1161 Int) (|v_ULTIMATE.start_main_~i~0#1_586| Int) (v_ArrVal_1163 Int) (v_ArrVal_1166 Int)) (or (< (select (store (store (store .cse0 .cse1 v_ArrVal_1161) .cse4 v_ArrVal_1163) (+ (* |v_ULTIMATE.start_main_~i~0#1_586| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1166) .cse2) .cse3) (not (<= .cse5 |v_ULTIMATE.start_main_~i~0#1_586|)) (not (<= v_ArrVal_1163 .cse6)))) (< c_~N~0 (+ .cse6 1))))) (or (<= .cse5 c_~N~0) (<= (+ (select .cse0 .cse2) 1) c_~N~0)) (forall ((v_ArrVal_1166 Int)) (< (select (store .cse0 .cse1 v_ArrVal_1166) .cse2) .cse3))))) is different from false [2022-11-18 20:39:02,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:39:02,775 INFO L93 Difference]: Finished difference Result 514 states and 586 transitions. [2022-11-18 20:39:02,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2022-11-18 20:39:02,776 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.7901234567901234) internal successors, (226), 81 states have internal predecessors, (226), 0 states have call successors, (0), 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 85 [2022-11-18 20:39:02,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:39:02,779 INFO L225 Difference]: With dead ends: 514 [2022-11-18 20:39:02,779 INFO L226 Difference]: Without dead ends: 512 [2022-11-18 20:39:02,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 129 SyntacticMatches, 10 SemanticMatches, 211 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 14970 ImplicationChecksByTransitivity, 53.0s TimeCoverageRelationStatistics Valid=2526, Invalid=42206, Unknown=4, NotChecked=420, Total=45156 [2022-11-18 20:39:02,783 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 739 mSDsluCounter, 1456 mSDsCounter, 0 mSdLazyCounter, 3705 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 1504 SdHoareTripleChecker+Invalid, 4436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 3705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 606 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:39:02,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [739 Valid, 1504 Invalid, 4436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 3705 Invalid, 0 Unknown, 606 Unchecked, 2.4s Time] [2022-11-18 20:39:02,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-11-18 20:39:02,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 171. [2022-11-18 20:39:02,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.2411764705882353) internal successors, (211), 170 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:39:02,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 211 transitions. [2022-11-18 20:39:02,849 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 211 transitions. Word has length 85 [2022-11-18 20:39:02,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:39:02,849 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 211 transitions. [2022-11-18 20:39:02,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.7901234567901234) internal successors, (226), 81 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:39:02,850 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 211 transitions. [2022-11-18 20:39:02,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-18 20:39:02,850 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:39:02,851 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:39:02,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-18 20:39:03,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-18 20:39:03,056 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:39:03,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:39:03,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1283874564, now seen corresponding path program 8 times [2022-11-18 20:39:03,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:39:03,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549748857] [2022-11-18 20:39:03,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:39:03,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:39:03,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:39:03,532 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 120 proven. 106 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-18 20:39:03,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:39:03,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549748857] [2022-11-18 20:39:03,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549748857] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:39:03,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770119157] [2022-11-18 20:39:03,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:39:03,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:39:03,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:39:03,534 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:39:03,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-18 20:39:03,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:39:03,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:39:03,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 20:39:03,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:39:04,053 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 145 proven. 81 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-18 20:39:04,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:39:04,325 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 145 proven. 81 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-18 20:39:04,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770119157] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:39:04,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:39:04,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2022-11-18 20:39:04,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438794789] [2022-11-18 20:39:04,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:39:04,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-18 20:39:04,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:39:04,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-18 20:39:04,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2022-11-18 20:39:04,327 INFO L87 Difference]: Start difference. First operand 171 states and 211 transitions. Second operand has 35 states, 35 states have (on average 2.8285714285714287) internal successors, (99), 35 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:39:04,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:39:04,989 INFO L93 Difference]: Finished difference Result 389 states and 460 transitions. [2022-11-18 20:39:04,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-18 20:39:04,990 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.8285714285714287) internal successors, (99), 35 states have internal predecessors, (99), 0 states have call successors, (0), 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 88 [2022-11-18 20:39:04,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:39:04,990 INFO L225 Difference]: With dead ends: 389 [2022-11-18 20:39:04,991 INFO L226 Difference]: Without dead ends: 301 [2022-11-18 20:39:04,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 144 SyntacticMatches, 20 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=486, Invalid=1494, Unknown=0, NotChecked=0, Total=1980 [2022-11-18 20:39:04,991 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 407 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:39:04,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 183 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:39:04,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-11-18 20:39:05,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 226. [2022-11-18 20:39:05,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.1955555555555555) internal successors, (269), 225 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:39:05,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 269 transitions. [2022-11-18 20:39:05,071 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 269 transitions. Word has length 88 [2022-11-18 20:39:05,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:39:05,071 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 269 transitions. [2022-11-18 20:39:05,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.8285714285714287) internal successors, (99), 35 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:39:05,072 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 269 transitions. [2022-11-18 20:39:05,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-18 20:39:05,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:39:05,073 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:39:05,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-18 20:39:05,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-18 20:39:05,278 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:39:05,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:39:05,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1159029298, now seen corresponding path program 9 times [2022-11-18 20:39:05,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:39:05,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757964969] [2022-11-18 20:39:05,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:39:05,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:39:05,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:39:06,880 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:39:06,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:39:06,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757964969] [2022-11-18 20:39:06,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757964969] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:39:06,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68187405] [2022-11-18 20:39:06,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:39:06,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:39:06,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:39:06,882 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:39:06,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-18 20:39:07,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-11-18 20:39:07,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:39:07,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-18 20:39:07,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:39:08,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-11-18 20:39:09,433 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-18 20:39:09,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-11-18 20:39:09,504 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 120 proven. 125 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-18 20:39:09,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:39:11,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 62 [2022-11-18 20:39:11,079 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-18 20:39:11,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 62 [2022-11-18 20:39:11,403 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 112 proven. 133 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-18 20:39:11,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68187405] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:39:11,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:39:11,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 25, 25] total 72 [2022-11-18 20:39:11,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504495396] [2022-11-18 20:39:11,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:39:11,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-18 20:39:11,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:39:11,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-18 20:39:11,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=554, Invalid=4558, Unknown=0, NotChecked=0, Total=5112 [2022-11-18 20:39:11,406 INFO L87 Difference]: Start difference. First operand 226 states and 269 transitions. Second operand has 72 states, 72 states have (on average 2.7083333333333335) internal successors, (195), 72 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:39:16,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:39:16,795 INFO L93 Difference]: Finished difference Result 302 states and 346 transitions. [2022-11-18 20:39:16,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-11-18 20:39:16,795 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.7083333333333335) internal successors, (195), 72 states have internal predecessors, (195), 0 states have call successors, (0), 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 89 [2022-11-18 20:39:16,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:39:16,796 INFO L225 Difference]: With dead ends: 302 [2022-11-18 20:39:16,797 INFO L226 Difference]: Without dead ends: 143 [2022-11-18 20:39:16,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 156 SyntacticMatches, 9 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5436 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=2396, Invalid=18196, Unknown=0, NotChecked=0, Total=20592 [2022-11-18 20:39:16,799 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 151 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 1124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:39:16,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 604 Invalid, 1124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 804 Invalid, 0 Unknown, 196 Unchecked, 0.6s Time] [2022-11-18 20:39:16,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-18 20:39:16,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2022-11-18 20:39:16,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 114 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:39:16,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2022-11-18 20:39:16,839 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 89 [2022-11-18 20:39:16,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:39:16,839 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2022-11-18 20:39:16,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.7083333333333335) internal successors, (195), 72 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:39:16,840 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2022-11-18 20:39:16,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-18 20:39:16,840 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:39:16,840 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:39:16,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-18 20:39:17,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-18 20:39:17,050 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:39:17,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:39:17,051 INFO L85 PathProgramCache]: Analyzing trace with hash -282588986, now seen corresponding path program 10 times [2022-11-18 20:39:17,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:39:17,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904477998] [2022-11-18 20:39:17,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:39:17,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:39:17,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:39:19,040 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 1 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:39:19,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:39:19,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904477998] [2022-11-18 20:39:19,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904477998] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:39:19,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980727496] [2022-11-18 20:39:19,041 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:39:19,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:39:19,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:39:19,043 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:39:19,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-18 20:39:19,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:39:19,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:39:19,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-18 20:39:19,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:39:19,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-11-18 20:39:19,503 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-18 20:39:19,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-11-18 20:39:19,619 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-18 20:39:19,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-11-18 20:39:20,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2022-11-18 20:39:20,167 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 2 proven. 241 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-18 20:39:20,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:40:16,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2022-11-18 20:40:16,247 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-18 20:40:16,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1628 treesize of output 1206 [2022-11-18 20:40:17,192 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 1 proven. 223 refuted. 19 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-18 20:40:17,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980727496] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:40:17,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:40:17,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 23, 25] total 63 [2022-11-18 20:40:17,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800704510] [2022-11-18 20:40:17,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:40:17,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-18 20:40:17,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:40:17,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-18 20:40:17,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=3547, Unknown=28, NotChecked=0, Total=3906 [2022-11-18 20:40:17,195 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand has 63 states, 63 states have (on average 3.0634920634920637) internal successors, (193), 63 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:40:20,322 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse0 (* |c_ULTIMATE.start_main_~i~0#1| 4)) (.cse2 (+ 28 |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (or (<= (+ 2 |c_ULTIMATE.start_main_~i~0#1|) c_~N~0) (and (not (= .cse0 28)) (<= (+ (select .cse1 .cse2) 1) c_~N~0))) (<= 10 c_~N~0) (forall ((v_ArrVal_1413 Int) (v_ArrVal_1412 Int) (|v_ULTIMATE.start_main_~i~0#1_703| Int)) (or (< (select (store (store .cse1 (+ .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1412) (+ (* |v_ULTIMATE.start_main_~i~0#1_703| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1413) .cse2) (+ c_~N~0 1)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_703|)))))) is different from false [2022-11-18 20:40:22,378 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse0 (* |c_ULTIMATE.start_main_~i~0#1| 4)) (.cse2 (+ 28 |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (or (<= (+ 2 |c_ULTIMATE.start_main_~i~0#1|) c_~N~0) (and (not (= .cse0 28)) (<= (+ (select .cse1 .cse2) 1) c_~N~0))) (forall ((v_ArrVal_1413 Int) (v_ArrVal_1412 Int) (|v_ULTIMATE.start_main_~i~0#1_703| Int)) (or (< (select (store (store .cse1 (+ .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1412) (+ (* |v_ULTIMATE.start_main_~i~0#1_703| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1413) .cse2) (+ c_~N~0 1)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_703|)))))) is different from false [2022-11-18 20:40:43,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:40:43,003 INFO L93 Difference]: Finished difference Result 312 states and 341 transitions. [2022-11-18 20:40:43,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-11-18 20:40:43,004 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.0634920634920637) internal successors, (193), 63 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2022-11-18 20:40:43,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:40:43,006 INFO L225 Difference]: With dead ends: 312 [2022-11-18 20:40:43,006 INFO L226 Difference]: Without dead ends: 310 [2022-11-18 20:40:43,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 167 SyntacticMatches, 7 SemanticMatches, 158 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 7244 ImplicationChecksByTransitivity, 81.3s TimeCoverageRelationStatistics Valid=1485, Invalid=23292, Unknown=37, NotChecked=626, Total=25440 [2022-11-18 20:40:43,009 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 507 mSDsluCounter, 1192 mSDsCounter, 0 mSdLazyCounter, 2757 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 1234 SdHoareTripleChecker+Invalid, 3351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 2757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 471 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:40:43,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [507 Valid, 1234 Invalid, 3351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 2757 Invalid, 0 Unknown, 471 Unchecked, 1.6s Time] [2022-11-18 20:40:43,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-11-18 20:40:43,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 117. [2022-11-18 20:40:43,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.1810344827586208) internal successors, (137), 116 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:40:43,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 137 transitions. [2022-11-18 20:40:43,057 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 137 transitions. Word has length 90 [2022-11-18 20:40:43,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:40:43,058 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 137 transitions. [2022-11-18 20:40:43,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.0634920634920637) internal successors, (193), 63 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:40:43,058 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 137 transitions. [2022-11-18 20:40:43,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-18 20:40:43,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:40:43,059 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:40:43,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-18 20:40:43,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-18 20:40:43,266 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:40:43,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:40:43,266 INFO L85 PathProgramCache]: Analyzing trace with hash -467942782, now seen corresponding path program 11 times [2022-11-18 20:40:43,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:40:43,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655889180] [2022-11-18 20:40:43,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:40:43,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:40:43,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:40:45,184 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 1 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:40:45,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:40:45,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655889180] [2022-11-18 20:40:45,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655889180] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:40:45,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518616474] [2022-11-18 20:40:45,185 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:40:45,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:40:45,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:40:45,186 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:40:45,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-18 20:40:45,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-11-18 20:40:45,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:40:45,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-18 20:40:45,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:40:46,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-11-18 20:40:46,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:40:46,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-11-18 20:40:46,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-18 20:40:47,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-18 20:40:47,317 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:40:47,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:40:48,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 49 [2022-11-18 20:40:48,553 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-18 20:40:48,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 200 treesize of output 142 [2022-11-18 20:40:48,676 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 243 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-18 20:40:48,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518616474] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:40:48,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:40:48,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 26, 26] total 76 [2022-11-18 20:40:48,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474451717] [2022-11-18 20:40:48,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:40:48,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-18 20:40:48,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:40:48,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-18 20:40:48,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=5229, Unknown=0, NotChecked=0, Total=5700 [2022-11-18 20:40:48,679 INFO L87 Difference]: Start difference. First operand 117 states and 137 transitions. Second operand has 76 states, 76 states have (on average 3.1710526315789473) internal successors, (241), 76 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:40:59,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:40:59,951 INFO L93 Difference]: Finished difference Result 367 states and 410 transitions. [2022-11-18 20:40:59,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-11-18 20:40:59,952 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.1710526315789473) internal successors, (241), 76 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2022-11-18 20:40:59,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:40:59,954 INFO L225 Difference]: With dead ends: 367 [2022-11-18 20:40:59,954 INFO L226 Difference]: Without dead ends: 365 [2022-11-18 20:40:59,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 151 SyntacticMatches, 11 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 12503 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=3006, Invalid=34435, Unknown=1, NotChecked=0, Total=37442 [2022-11-18 20:40:59,959 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 818 mSDsluCounter, 1025 mSDsCounter, 0 mSdLazyCounter, 3447 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 4015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 3447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 365 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:40:59,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [818 Valid, 1056 Invalid, 4015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 3447 Invalid, 0 Unknown, 365 Unchecked, 2.0s Time] [2022-11-18 20:40:59,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-11-18 20:41:00,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 122. [2022-11-18 20:41:00,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.2148760330578512) internal successors, (147), 121 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:41:00,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 147 transitions. [2022-11-18 20:41:00,021 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 147 transitions. Word has length 90 [2022-11-18 20:41:00,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:41:00,022 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 147 transitions. [2022-11-18 20:41:00,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.1710526315789473) internal successors, (241), 76 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:41:00,022 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 147 transitions. [2022-11-18 20:41:00,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-18 20:41:00,023 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:41:00,023 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:41:00,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-11-18 20:41:00,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:41:00,223 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:41:00,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:41:00,224 INFO L85 PathProgramCache]: Analyzing trace with hash 230048378, now seen corresponding path program 17 times [2022-11-18 20:41:00,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:41:00,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689739935] [2022-11-18 20:41:00,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:41:00,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:41:00,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:41:01,997 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 0 proven. 373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:41:01,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:41:01,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689739935] [2022-11-18 20:41:01,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689739935] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:41:01,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290917605] [2022-11-18 20:41:01,998 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:41:01,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:41:01,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:41:01,999 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:41:02,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-18 20:41:02,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-11-18 20:41:02,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:41:02,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-18 20:41:02,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:41:03,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-11-18 20:41:03,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-18 20:41:04,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-18 20:41:04,201 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 0 proven. 372 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:41:04,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:41:07,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-11-18 20:41:07,245 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-18 20:41:07,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 204 treesize of output 142 [2022-11-18 20:41:07,364 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-18 20:41:07,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290917605] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:41:07,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:41:07,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 26, 26] total 75 [2022-11-18 20:41:07,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001642423] [2022-11-18 20:41:07,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:41:07,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-11-18 20:41:07,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:41:07,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-11-18 20:41:07,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=5142, Unknown=0, NotChecked=0, Total=5550 [2022-11-18 20:41:07,367 INFO L87 Difference]: Start difference. First operand 122 states and 147 transitions. Second operand has 75 states, 75 states have (on average 3.3733333333333335) internal successors, (253), 75 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:41:11,574 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 4)) (.cse2 (+ 32 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse3 (+ c_~N~0 1))) (and (forall ((v_ArrVal_1592 Int)) (< (select (store .cse0 (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1592) .cse2) .cse3)) (<= 10 c_~N~0) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (or (<= (+ 1 (select .cse0 .cse2)) c_~N~0) (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) c_~N~0)) (forall ((v_ArrVal_1592 Int)) (< (select (store .cse0 (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset| 4) v_ArrVal_1592) .cse2) .cse3)))) is different from false [2022-11-18 20:41:17,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:41:17,651 INFO L93 Difference]: Finished difference Result 393 states and 448 transitions. [2022-11-18 20:41:17,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-11-18 20:41:17,652 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.3733333333333335) internal successors, (253), 75 states have internal predecessors, (253), 0 states have call successors, (0), 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 94 [2022-11-18 20:41:17,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:41:17,652 INFO L225 Difference]: With dead ends: 393 [2022-11-18 20:41:17,653 INFO L226 Difference]: Without dead ends: 391 [2022-11-18 20:41:17,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 155 SyntacticMatches, 4 SemanticMatches, 202 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 12896 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=2728, Invalid=38281, Unknown=1, NotChecked=402, Total=41412 [2022-11-18 20:41:17,656 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 670 mSDsluCounter, 1170 mSDsCounter, 0 mSdLazyCounter, 3440 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 1199 SdHoareTripleChecker+Invalid, 4000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 3440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 447 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:41:17,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [670 Valid, 1199 Invalid, 4000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 3440 Invalid, 0 Unknown, 447 Unchecked, 1.9s Time] [2022-11-18 20:41:17,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-11-18 20:41:17,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 181. [2022-11-18 20:41:17,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.2222222222222223) internal successors, (220), 180 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:41:17,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 220 transitions. [2022-11-18 20:41:17,758 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 220 transitions. Word has length 94 [2022-11-18 20:41:17,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:41:17,758 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 220 transitions. [2022-11-18 20:41:17,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.3733333333333335) internal successors, (253), 75 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:41:17,758 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 220 transitions. [2022-11-18 20:41:17,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-18 20:41:17,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:41:17,759 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:41:17,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-18 20:41:17,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:41:17,962 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:41:17,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:41:17,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1367172294, now seen corresponding path program 12 times [2022-11-18 20:41:17,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:41:17,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331281216] [2022-11-18 20:41:17,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:41:17,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:41:18,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:41:19,698 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 0 proven. 373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:41:19,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:41:19,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331281216] [2022-11-18 20:41:19,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331281216] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:41:19,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490256711] [2022-11-18 20:41:19,699 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:41:19,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:41:19,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:41:19,700 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:41:19,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-18 20:41:20,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-11-18 20:41:20,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:41:20,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-18 20:41:20,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:41:21,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-18 20:41:21,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-18 20:41:23,154 INFO L321 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2022-11-18 20:41:23,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 40 [2022-11-18 20:41:23,214 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 157 proven. 116 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-18 20:41:23,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:41:25,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2022-11-18 20:41:25,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-18 20:41:26,020 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 112 proven. 161 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-18 20:41:26,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490256711] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:41:26,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:41:26,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 31, 31] total 82 [2022-11-18 20:41:26,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196006025] [2022-11-18 20:41:26,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:41:26,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-11-18 20:41:26,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:41:26,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-11-18 20:41:26,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=786, Invalid=5856, Unknown=0, NotChecked=0, Total=6642 [2022-11-18 20:41:26,023 INFO L87 Difference]: Start difference. First operand 181 states and 220 transitions. Second operand has 82 states, 82 states have (on average 2.451219512195122) internal successors, (201), 82 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:45:25,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:25,456 INFO L93 Difference]: Finished difference Result 1111 states and 1312 transitions. [2022-11-18 20:45:25,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 266 states. [2022-11-18 20:45:25,456 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.451219512195122) internal successors, (201), 82 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-11-18 20:45:25,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:25,459 INFO L225 Difference]: With dead ends: 1111 [2022-11-18 20:45:25,459 INFO L226 Difference]: Without dead ends: 893 [2022-11-18 20:45:25,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 151 SyntacticMatches, 72 SemanticMatches, 333 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50096 ImplicationChecksByTransitivity, 240.5s TimeCoverageRelationStatistics Valid=10692, Invalid=101077, Unknown=121, NotChecked=0, Total=111890 [2022-11-18 20:45:25,466 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 1084 mSDsluCounter, 1811 mSDsCounter, 0 mSdLazyCounter, 3389 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1084 SdHoareTripleChecker+Valid, 1879 SdHoareTripleChecker+Invalid, 6253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 3389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2569 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:45:25,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1084 Valid, 1879 Invalid, 6253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 3389 Invalid, 0 Unknown, 2569 Unchecked, 2.2s Time] [2022-11-18 20:45:25,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-11-18 20:45:25,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 385. [2022-11-18 20:45:25,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.2682291666666667) internal successors, (487), 384 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:45:25,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 487 transitions. [2022-11-18 20:45:25,731 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 487 transitions. Word has length 94 [2022-11-18 20:45:25,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:25,731 INFO L495 AbstractCegarLoop]: Abstraction has 385 states and 487 transitions. [2022-11-18 20:45:25,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.451219512195122) internal successors, (201), 82 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:45:25,732 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 487 transitions. [2022-11-18 20:45:25,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-18 20:45:25,733 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:25,733 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:25,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-18 20:45:25,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:25,941 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:45:25,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:25,941 INFO L85 PathProgramCache]: Analyzing trace with hash -194350928, now seen corresponding path program 18 times [2022-11-18 20:45:25,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:25,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596159112] [2022-11-18 20:45:25,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:25,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:25,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:27,827 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 407 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:27,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:27,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596159112] [2022-11-18 20:45:27,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596159112] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:45:27,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314593796] [2022-11-18 20:45:27,828 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:45:27,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:27,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:45:27,832 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:45:27,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-18 20:45:28,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-11-18 20:45:28,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:45:28,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-18 20:45:28,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:45:29,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-11-18 20:45:29,462 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:45:29,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 34 [2022-11-18 20:45:31,798 INFO L321 Elim1Store]: treesize reduction 24, result has 11.1 percent of original size [2022-11-18 20:45:31,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 17 [2022-11-18 20:45:31,862 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 205 proven. 110 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-18 20:45:31,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:45:34,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 67 [2022-11-18 20:45:34,441 INFO L321 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2022-11-18 20:45:34,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 135 treesize of output 96 [2022-11-18 20:45:35,179 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 136 proven. 187 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-18 20:45:35,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314593796] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:45:35,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:45:35,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 33, 34] total 91 [2022-11-18 20:45:35,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313136057] [2022-11-18 20:45:35,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:45:35,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-11-18 20:45:35,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:45:35,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-11-18 20:45:35,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1026, Invalid=7164, Unknown=0, NotChecked=0, Total=8190 [2022-11-18 20:45:35,182 INFO L87 Difference]: Start difference. First operand 385 states and 487 transitions. Second operand has 91 states, 91 states have (on average 2.4615384615384617) internal successors, (224), 91 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:20,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:46:20,090 INFO L93 Difference]: Finished difference Result 1088 states and 1367 transitions. [2022-11-18 20:46:20,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 205 states. [2022-11-18 20:46:20,091 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.4615384615384617) internal successors, (224), 91 states have internal predecessors, (224), 0 states have call successors, (0), 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 98 [2022-11-18 20:46:20,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:46:20,094 INFO L225 Difference]: With dead ends: 1088 [2022-11-18 20:46:20,095 INFO L226 Difference]: Without dead ends: 927 [2022-11-18 20:46:20,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 165 SyntacticMatches, 17 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19987 ImplicationChecksByTransitivity, 48.7s TimeCoverageRelationStatistics Valid=7642, Invalid=51147, Unknown=17, NotChecked=0, Total=58806 [2022-11-18 20:46:20,100 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 502 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 1982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 841 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:46:20,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [502 Valid, 922 Invalid, 1982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 907 Invalid, 0 Unknown, 841 Unchecked, 0.8s Time] [2022-11-18 20:46:20,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2022-11-18 20:46:20,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 719. [2022-11-18 20:46:20,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 1.3119777158774373) internal successors, (942), 718 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:20,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 942 transitions. [2022-11-18 20:46:20,644 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 942 transitions. Word has length 98 [2022-11-18 20:46:20,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:46:20,644 INFO L495 AbstractCegarLoop]: Abstraction has 719 states and 942 transitions. [2022-11-18 20:46:20,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.4615384615384617) internal successors, (224), 91 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:20,645 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 942 transitions. [2022-11-18 20:46:20,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-18 20:46:20,647 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:46:20,647 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:46:20,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-18 20:46:20,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-18 20:46:20,855 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:46:20,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:46:20,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1091744206, now seen corresponding path program 13 times [2022-11-18 20:46:20,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:46:20,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750252241] [2022-11-18 20:46:20,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:20,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:46:20,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:22,641 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 407 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:22,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:46:22,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750252241] [2022-11-18 20:46:22,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750252241] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:46:22,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007717659] [2022-11-18 20:46:22,642 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:46:22,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:22,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:46:22,643 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:46:22,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-18 20:46:22,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:22,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-18 20:46:22,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:46:23,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-18 20:46:24,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 20:46:24,429 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:46:24,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:46:24,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-18 20:46:24,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-11-18 20:46:24,719 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 307 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-18 20:46:24,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007717659] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:46:24,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:46:24,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 25, 24] total 62 [2022-11-18 20:46:24,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535441031] [2022-11-18 20:46:24,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:46:24,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-18 20:46:24,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:46:24,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-18 20:46:24,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=3486, Unknown=0, NotChecked=0, Total=3782 [2022-11-18 20:46:24,722 INFO L87 Difference]: Start difference. First operand 719 states and 942 transitions. Second operand has 62 states, 62 states have (on average 3.7419354838709675) internal successors, (232), 62 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) [2022-11-18 20:46:30,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:46:30,223 INFO L93 Difference]: Finished difference Result 1153 states and 1452 transitions. [2022-11-18 20:46:30,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-11-18 20:46:30,223 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.7419354838709675) internal successors, (232), 62 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 98 [2022-11-18 20:46:30,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:46:30,227 INFO L225 Difference]: With dead ends: 1153 [2022-11-18 20:46:30,227 INFO L226 Difference]: Without dead ends: 1151 [2022-11-18 20:46:30,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 172 SyntacticMatches, 3 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4610 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1534, Invalid=15236, Unknown=0, NotChecked=0, Total=16770 [2022-11-18 20:46:30,229 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 739 mSDsluCounter, 871 mSDsCounter, 0 mSdLazyCounter, 3165 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 3308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 3165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:46:30,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [739 Valid, 905 Invalid, 3308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 3165 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-18 20:46:30,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2022-11-18 20:46:30,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 928. [2022-11-18 20:46:30,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 1.3203883495145632) internal successors, (1224), 927 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:30,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1224 transitions. [2022-11-18 20:46:30,948 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1224 transitions. Word has length 98 [2022-11-18 20:46:30,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:46:30,949 INFO L495 AbstractCegarLoop]: Abstraction has 928 states and 1224 transitions. [2022-11-18 20:46:30,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.7419354838709675) internal successors, (232), 62 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) [2022-11-18 20:46:30,949 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1224 transitions. [2022-11-18 20:46:30,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-18 20:46:30,952 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:46:30,952 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 10, 10, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:46:30,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-18 20:46:31,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-18 20:46:31,159 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:46:31,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:46:31,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1751749122, now seen corresponding path program 14 times [2022-11-18 20:46:31,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:46:31,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691422756] [2022-11-18 20:46:31,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:31,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:46:31,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:31,733 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 213 proven. 134 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-18 20:46:31,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:46:31,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691422756] [2022-11-18 20:46:31,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691422756] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:46:31,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091196243] [2022-11-18 20:46:31,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:46:31,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:31,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:46:31,750 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:46:31,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-18 20:46:32,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:46:32,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:46:32,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 20:46:32,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:46:32,498 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 238 proven. 100 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-18 20:46:32,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:46:32,840 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 238 proven. 100 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-18 20:46:32,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091196243] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:46:32,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:46:32,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 25] total 40 [2022-11-18 20:46:32,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903363491] [2022-11-18 20:46:32,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:46:32,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-18 20:46:32,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:46:32,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-18 20:46:32,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=1192, Unknown=0, NotChecked=0, Total=1560 [2022-11-18 20:46:32,843 INFO L87 Difference]: Start difference. First operand 928 states and 1224 transitions. Second operand has 40 states, 40 states have (on average 2.9) internal successors, (116), 40 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:33,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:46:33,912 INFO L93 Difference]: Finished difference Result 1216 states and 1526 transitions. [2022-11-18 20:46:33,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-18 20:46:33,913 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.9) internal successors, (116), 40 states have internal predecessors, (116), 0 states have call successors, (0), 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 99 [2022-11-18 20:46:33,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:46:33,914 INFO L225 Difference]: With dead ends: 1216 [2022-11-18 20:46:33,914 INFO L226 Difference]: Without dead ends: 462 [2022-11-18 20:46:33,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 163 SyntacticMatches, 22 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=599, Invalid=1951, Unknown=0, NotChecked=0, Total=2550 [2022-11-18 20:46:33,916 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 609 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:46:33,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [609 Valid, 167 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 20:46:33,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-11-18 20:46:34,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 384. [2022-11-18 20:46:34,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 1.248041775456919) internal successors, (478), 383 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:34,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 478 transitions. [2022-11-18 20:46:34,114 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 478 transitions. Word has length 99 [2022-11-18 20:46:34,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:46:34,114 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 478 transitions. [2022-11-18 20:46:34,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.9) internal successors, (116), 40 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:34,115 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 478 transitions. [2022-11-18 20:46:34,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-18 20:46:34,115 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:46:34,115 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 11, 11, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:46:34,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-11-18 20:46:34,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-18 20:46:34,316 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:46:34,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:46:34,316 INFO L85 PathProgramCache]: Analyzing trace with hash 773305284, now seen corresponding path program 15 times [2022-11-18 20:46:34,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:46:34,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731969008] [2022-11-18 20:46:34,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:34,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:46:34,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:35,085 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 213 proven. 155 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-18 20:46:35,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:46:35,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731969008] [2022-11-18 20:46:35,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731969008] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:46:35,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167782177] [2022-11-18 20:46:35,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:46:35,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:35,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:46:35,088 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:46:35,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-18 20:46:36,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-11-18 20:46:36,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:46:36,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-18 20:46:36,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:46:36,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-11-18 20:46:36,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-18 20:46:36,967 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:46:36,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 37 [2022-11-18 20:46:37,188 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:46:37,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 46 [2022-11-18 20:46:38,906 INFO L321 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2022-11-18 20:46:38,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 17 [2022-11-18 20:46:38,970 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 117 proven. 232 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-11-18 20:46:38,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:46:40,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 77 [2022-11-18 20:46:40,854 INFO L321 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-11-18 20:46:40,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 186 treesize of output 156 [2022-11-18 20:46:42,363 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-11-18 20:46:42,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167782177] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:46:42,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:46:42,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 36, 37] total 96 [2022-11-18 20:46:42,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218930444] [2022-11-18 20:46:42,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:46:42,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-11-18 20:46:42,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:46:42,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-11-18 20:46:42,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=8128, Unknown=0, NotChecked=0, Total=9120 [2022-11-18 20:46:42,365 INFO L87 Difference]: Start difference. First operand 384 states and 478 transitions. Second operand has 96 states, 96 states have (on average 2.2708333333333335) internal successors, (218), 96 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:49:39,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:49:39,550 INFO L93 Difference]: Finished difference Result 930 states and 1120 transitions. [2022-11-18 20:49:39,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 341 states. [2022-11-18 20:49:39,550 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.2708333333333335) internal successors, (218), 96 states have internal predecessors, (218), 0 states have call successors, (0), 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 101 [2022-11-18 20:49:39,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:49:39,552 INFO L225 Difference]: With dead ends: 930 [2022-11-18 20:49:39,552 INFO L226 Difference]: Without dead ends: 715 [2022-11-18 20:49:39,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 161 SyntacticMatches, 25 SemanticMatches, 407 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67059 ImplicationChecksByTransitivity, 178.1s TimeCoverageRelationStatistics Valid=13421, Invalid=153382, Unknown=69, NotChecked=0, Total=166872 [2022-11-18 20:49:39,559 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 1274 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 3365 mSolverCounterSat, 675 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1274 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 5603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 675 IncrementalHoareTripleChecker+Valid, 3365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1563 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:49:39,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1274 Valid, 769 Invalid, 5603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [675 Valid, 3365 Invalid, 0 Unknown, 1563 Unchecked, 2.6s Time] [2022-11-18 20:49:39,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2022-11-18 20:49:39,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 324. [2022-11-18 20:49:39,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 1.21671826625387) internal successors, (393), 323 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:49:39,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 393 transitions. [2022-11-18 20:49:39,768 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 393 transitions. Word has length 101 [2022-11-18 20:49:39,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:49:39,769 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 393 transitions. [2022-11-18 20:49:39,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.2708333333333335) internal successors, (218), 96 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:49:39,769 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 393 transitions. [2022-11-18 20:49:39,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-18 20:49:39,770 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:49:39,770 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:49:39,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-11-18 20:49:39,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-18 20:49:39,978 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:49:39,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:49:39,978 INFO L85 PathProgramCache]: Analyzing trace with hash 186984814, now seen corresponding path program 16 times [2022-11-18 20:49:39,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:49:39,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55920440] [2022-11-18 20:49:39,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:49:39,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:49:40,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:42,287 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:49:42,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:49:42,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55920440] [2022-11-18 20:49:42,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55920440] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:49:42,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340008668] [2022-11-18 20:49:42,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:49:42,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:49:42,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:49:42,289 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:49:42,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-18 20:49:42,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:49:42,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:49:42,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-18 20:49:42,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:49:42,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-11-18 20:49:42,804 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-18 20:49:42,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-11-18 20:49:43,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2022-11-18 20:49:43,577 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-11-18 20:49:43,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:49:48,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2022-11-18 20:49:48,546 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-18 20:49:48,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 204 treesize of output 142 [2022-11-18 20:49:48,673 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-11-18 20:49:48,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340008668] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:49:48,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:49:48,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 26, 27] total 68 [2022-11-18 20:49:48,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539091909] [2022-11-18 20:49:48,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:49:48,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-18 20:49:48,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:49:48,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-18 20:49:48,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=4201, Unknown=2, NotChecked=0, Total=4556 [2022-11-18 20:49:48,676 INFO L87 Difference]: Start difference. First operand 324 states and 393 transitions. Second operand has 68 states, 68 states have (on average 3.264705882352941) internal successors, (222), 68 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:49:58,566 WARN L233 SmtUtils]: Spent 6.14s on a formula simplification. DAG size of input: 35 DAG size of output: 33 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:50:03,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:03,680 INFO L93 Difference]: Finished difference Result 546 states and 622 transitions. [2022-11-18 20:50:03,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-11-18 20:50:03,680 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.264705882352941) internal successors, (222), 68 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2022-11-18 20:50:03,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:03,681 INFO L225 Difference]: With dead ends: 546 [2022-11-18 20:50:03,682 INFO L226 Difference]: Without dead ends: 544 [2022-11-18 20:50:03,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 195 SyntacticMatches, 5 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7710 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=1459, Invalid=26595, Unknown=2, NotChecked=0, Total=28056 [2022-11-18 20:50:03,684 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 473 mSDsluCounter, 1277 mSDsCounter, 0 mSdLazyCounter, 4043 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 1312 SdHoareTripleChecker+Invalid, 4470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 4043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 292 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:03,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 1312 Invalid, 4470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 4043 Invalid, 0 Unknown, 292 Unchecked, 2.5s Time] [2022-11-18 20:50:03,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-11-18 20:50:03,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 286. [2022-11-18 20:50:03,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 1.2140350877192982) internal successors, (346), 285 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:03,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 346 transitions. [2022-11-18 20:50:03,891 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 346 transitions. Word has length 103 [2022-11-18 20:50:03,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:03,892 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 346 transitions. [2022-11-18 20:50:03,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.264705882352941) internal successors, (222), 68 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:03,892 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 346 transitions. [2022-11-18 20:50:03,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-18 20:50:03,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:03,893 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:50:03,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-18 20:50:04,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-18 20:50:04,100 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:50:04,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:04,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1086614790, now seen corresponding path program 17 times [2022-11-18 20:50:04,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:50:04,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780279054] [2022-11-18 20:50:04,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:04,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:50:04,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:04,845 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 213 proven. 178 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-18 20:50:04,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:50:04,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780279054] [2022-11-18 20:50:04,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780279054] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:50:04,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284381179] [2022-11-18 20:50:04,846 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:50:04,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:04,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:50:04,849 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:50:04,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b5b46de-b5ee-4b2f-94c8-f753247b4e89/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-18 20:50:05,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-11-18 20:50:05,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:50:05,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-18 20:50:05,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:06,478 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 247 proven. 144 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-18 20:50:06,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:50:06,909 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 247 proven. 144 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-18 20:50:06,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284381179] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:50:06,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:50:06,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 44 [2022-11-18 20:50:06,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856764857] [2022-11-18 20:50:06,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:50:06,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-18 20:50:06,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:50:06,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-18 20:50:06,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2022-11-18 20:50:06,912 INFO L87 Difference]: Start difference. First operand 286 states and 346 transitions. Second operand has 44 states, 44 states have (on average 2.7954545454545454) internal successors, (123), 44 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)