./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.01.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a 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_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.01.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1bc25ea26c5b0a3f713e59ee991d97185223a272bca137eca8d49c3babbebcf9 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:22:50,194 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:22:50,288 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:22:50,296 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:22:50,297 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:22:50,334 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:22:50,335 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:22:50,335 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:22:50,336 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:22:50,336 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:22:50,337 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:22:50,337 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:22:50,337 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:22:50,340 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:22:50,340 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:22:50,342 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:22:50,343 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:22:50,343 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:22:50,344 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:22:50,344 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:22:50,345 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:22:50,346 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:22:50,347 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:22:50,347 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:22:50,348 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:22:50,348 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:22:50,349 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:22:50,349 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:22:50,350 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:22:50,350 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:22:50,351 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:22:50,351 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:22:50,351 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:22:50,352 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:22:50,352 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:22:50,353 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:22:50,353 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:22:50,354 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:22:50,354 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:22:50,354 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:22:50,355 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:22:50,355 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:22:50,356 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:22:50,356 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:22:50,357 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:22:50,357 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:22:50,358 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:22:50,358 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1bc25ea26c5b0a3f713e59ee991d97185223a272bca137eca8d49c3babbebcf9 [2024-11-02 12:22:50,664 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:22:50,692 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:22:50,695 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:22:50,696 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:22:50,698 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:22:50,700 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.01.cil-1.c Unable to find full path for "g++" [2024-11-02 12:22:52,736 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:22:52,995 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:22:52,996 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.01.cil-1.c [2024-11-02 12:22:53,019 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/data/17a5c6a6f/9537224fb82148e2b184cc71997e4c57/FLAGb41f3d8c8 [2024-11-02 12:22:53,033 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/data/17a5c6a6f/9537224fb82148e2b184cc71997e4c57 [2024-11-02 12:22:53,039 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:22:53,041 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:22:53,042 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:22:53,043 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:22:53,047 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:22:53,048 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:22:53" (1/1) ... [2024-11-02 12:22:53,049 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@595ee1ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:22:53, skipping insertion in model container [2024-11-02 12:22:53,049 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:22:53" (1/1) ... [2024-11-02 12:22:53,097 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:22:53,294 WARN L251 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_8d82365f-b0d7-48aa-9b0d-7704519fc205/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.01.cil-1.c[913,926] [2024-11-02 12:22:53,351 WARN L251 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_8d82365f-b0d7-48aa-9b0d-7704519fc205/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.01.cil-1.c[5977,5990] [2024-11-02 12:22:53,389 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:22:53,404 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:22:53,417 WARN L251 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_8d82365f-b0d7-48aa-9b0d-7704519fc205/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.01.cil-1.c[913,926] [2024-11-02 12:22:53,443 WARN L251 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_8d82365f-b0d7-48aa-9b0d-7704519fc205/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.01.cil-1.c[5977,5990] [2024-11-02 12:22:53,467 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:22:53,491 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:22:53,492 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:22:53 WrapperNode [2024-11-02 12:22:53,492 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:22:53,493 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:22:53,493 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:22:53,493 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:22:53,500 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:22:53" (1/1) ... [2024-11-02 12:22:53,509 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:22:53" (1/1) ... [2024-11-02 12:22:53,553 INFO L138 Inliner]: procedures = 50, calls = 51, calls flagged for inlining = 25, calls inlined = 25, statements flattened = 423 [2024-11-02 12:22:53,553 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:22:53,554 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:22:53,554 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:22:53,555 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:22:53,565 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:22:53" (1/1) ... [2024-11-02 12:22:53,570 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:22:53" (1/1) ... [2024-11-02 12:22:53,575 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:22:53" (1/1) ... [2024-11-02 12:22:53,576 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:22:53" (1/1) ... [2024-11-02 12:22:53,585 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:22:53" (1/1) ... [2024-11-02 12:22:53,595 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:22:53" (1/1) ... [2024-11-02 12:22:53,602 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:22:53" (1/1) ... [2024-11-02 12:22:53,604 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:22:53" (1/1) ... [2024-11-02 12:22:53,610 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:22:53,611 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:22:53,611 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:22:53,613 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:22:53,615 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:22:53" (1/1) ... [2024-11-02 12:22:53,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:22:53,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:22:53,658 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:22:53,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:22:53,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:22:53,696 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-02 12:22:53,696 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-02 12:22:53,697 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2024-11-02 12:22:53,697 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2024-11-02 12:22:53,697 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2024-11-02 12:22:53,697 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2024-11-02 12:22:53,697 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2024-11-02 12:22:53,698 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2024-11-02 12:22:53,698 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2024-11-02 12:22:53,698 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2024-11-02 12:22:53,698 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2024-11-02 12:22:53,698 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2024-11-02 12:22:53,698 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2024-11-02 12:22:53,699 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2024-11-02 12:22:53,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:22:53,700 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2024-11-02 12:22:53,700 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2024-11-02 12:22:53,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:22:53,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:22:53,701 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2024-11-02 12:22:53,702 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2024-11-02 12:22:53,842 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:22:53,845 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:22:54,462 INFO L? ?]: Removed 61 outVars from TransFormulas that were not future-live. [2024-11-02 12:22:54,462 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:22:54,720 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:22:54,721 INFO L316 CfgBuilder]: Removed 8 assume(true) statements. [2024-11-02 12:22:54,721 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:22:54 BoogieIcfgContainer [2024-11-02 12:22:54,721 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:22:54,724 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:22:54,724 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:22:54,728 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:22:54,728 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:22:53" (1/3) ... [2024-11-02 12:22:54,729 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a58cb14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:22:54, skipping insertion in model container [2024-11-02 12:22:54,730 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:22:53" (2/3) ... [2024-11-02 12:22:54,732 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a58cb14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:22:54, skipping insertion in model container [2024-11-02 12:22:54,732 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:22:54" (3/3) ... [2024-11-02 12:22:54,733 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.01.cil-1.c [2024-11-02 12:22:54,751 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:22:54,751 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-02 12:22:54,818 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:22:54,824 INFO L333 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, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@5da6f1aa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:22:54,824 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-02 12:22:54,828 INFO L276 IsEmpty]: Start isEmpty. Operand has 120 states, 87 states have (on average 1.5057471264367817) internal successors, (131), 92 states have internal predecessors, (131), 21 states have call successors, (21), 9 states have call predecessors, (21), 9 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2024-11-02 12:22:54,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-02 12:22:54,837 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:22:54,837 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:22:54,838 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:22:54,843 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:22:54,843 INFO L85 PathProgramCache]: Analyzing trace with hash 486120543, now seen corresponding path program 1 times [2024-11-02 12:22:54,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:22:54,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662376281] [2024-11-02 12:22:54,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:22:54,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:22:54,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:22:55,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:22:55,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:22:55,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662376281] [2024-11-02 12:22:55,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662376281] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:22:55,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:22:55,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:22:55,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632288220] [2024-11-02 12:22:55,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:22:55,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:22:55,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:22:55,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:22:55,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:22:55,242 INFO L87 Difference]: Start difference. First operand has 120 states, 87 states have (on average 1.5057471264367817) internal successors, (131), 92 states have internal predecessors, (131), 21 states have call successors, (21), 9 states have call predecessors, (21), 9 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 12:22:55,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:22:55,420 INFO L93 Difference]: Finished difference Result 273 states and 394 transitions. [2024-11-02 12:22:55,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:22:55,424 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2024-11-02 12:22:55,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:22:55,439 INFO L225 Difference]: With dead ends: 273 [2024-11-02 12:22:55,440 INFO L226 Difference]: Without dead ends: 153 [2024-11-02 12:22:55,444 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:22:55,448 INFO L432 NwaCegarLoop]: 147 mSDtfsCounter, 140 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:22:55,452 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 202 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:22:55,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-11-02 12:22:55,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 149. [2024-11-02 12:22:55,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 113 states have (on average 1.3982300884955752) internal successors, (158), 116 states have internal predecessors, (158), 24 states have call successors, (24), 11 states have call predecessors, (24), 10 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-11-02 12:22:55,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 204 transitions. [2024-11-02 12:22:55,529 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 204 transitions. Word has length 28 [2024-11-02 12:22:55,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:22:55,530 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 204 transitions. [2024-11-02 12:22:55,530 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 12:22:55,530 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 204 transitions. [2024-11-02 12:22:55,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-02 12:22:55,537 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:22:55,537 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:22:55,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:22:55,538 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:22:55,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:22:55,539 INFO L85 PathProgramCache]: Analyzing trace with hash -371248363, now seen corresponding path program 1 times [2024-11-02 12:22:55,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:22:55,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972387711] [2024-11-02 12:22:55,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:22:55,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:22:55,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:22:55,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:22:55,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:22:55,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972387711] [2024-11-02 12:22:55,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972387711] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:22:55,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:22:55,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:22:55,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156632194] [2024-11-02 12:22:55,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:22:55,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:22:55,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:22:55,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:22:55,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:22:55,686 INFO L87 Difference]: Start difference. First operand 149 states and 204 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 12:22:55,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:22:55,835 INFO L93 Difference]: Finished difference Result 305 states and 421 transitions. [2024-11-02 12:22:55,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:22:55,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2024-11-02 12:22:55,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:22:55,838 INFO L225 Difference]: With dead ends: 305 [2024-11-02 12:22:55,838 INFO L226 Difference]: Without dead ends: 224 [2024-11-02 12:22:55,843 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:22:55,844 INFO L432 NwaCegarLoop]: 133 mSDtfsCounter, 138 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:22:55,845 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 186 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:22:55,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2024-11-02 12:22:55,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 220. [2024-11-02 12:22:55,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 173 states have (on average 1.3815028901734103) internal successors, (239), 176 states have internal predecessors, (239), 31 states have call successors, (31), 15 states have call predecessors, (31), 14 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2024-11-02 12:22:55,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 299 transitions. [2024-11-02 12:22:55,879 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 299 transitions. Word has length 29 [2024-11-02 12:22:55,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:22:55,879 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 299 transitions. [2024-11-02 12:22:55,879 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 12:22:55,880 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 299 transitions. [2024-11-02 12:22:55,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-02 12:22:55,881 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:22:55,881 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:22:55,882 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 12:22:55,882 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:22:55,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:22:55,883 INFO L85 PathProgramCache]: Analyzing trace with hash 8381354, now seen corresponding path program 1 times [2024-11-02 12:22:55,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:22:55,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674676641] [2024-11-02 12:22:55,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:22:55,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:22:55,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:22:56,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:22:56,023 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:22:56,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674676641] [2024-11-02 12:22:56,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674676641] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:22:56,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:22:56,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:22:56,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31943770] [2024-11-02 12:22:56,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:22:56,025 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:22:56,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:22:56,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:22:56,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:22:56,026 INFO L87 Difference]: Start difference. First operand 220 states and 299 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 12:22:56,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:22:56,163 INFO L93 Difference]: Finished difference Result 460 states and 627 transitions. [2024-11-02 12:22:56,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:22:56,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2024-11-02 12:22:56,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:22:56,166 INFO L225 Difference]: With dead ends: 460 [2024-11-02 12:22:56,166 INFO L226 Difference]: Without dead ends: 308 [2024-11-02 12:22:56,171 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:22:56,172 INFO L432 NwaCegarLoop]: 145 mSDtfsCounter, 46 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:22:56,173 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 263 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:22:56,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2024-11-02 12:22:56,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 294. [2024-11-02 12:22:56,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 236 states have (on average 1.3728813559322033) internal successors, (324), 241 states have internal predecessors, (324), 37 states have call successors, (37), 20 states have call predecessors, (37), 19 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2024-11-02 12:22:56,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 396 transitions. [2024-11-02 12:22:56,235 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 396 transitions. Word has length 30 [2024-11-02 12:22:56,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:22:56,235 INFO L471 AbstractCegarLoop]: Abstraction has 294 states and 396 transitions. [2024-11-02 12:22:56,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 12:22:56,236 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 396 transitions. [2024-11-02 12:22:56,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-02 12:22:56,239 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:22:56,239 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:22:56,239 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 12:22:56,239 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:22:56,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:22:56,240 INFO L85 PathProgramCache]: Analyzing trace with hash 265680629, now seen corresponding path program 1 times [2024-11-02 12:22:56,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:22:56,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110540720] [2024-11-02 12:22:56,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:22:56,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:22:56,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:22:56,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:22:56,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:22:56,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110540720] [2024-11-02 12:22:56,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110540720] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:22:56,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:22:56,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-02 12:22:56,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660087872] [2024-11-02 12:22:56,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:22:56,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:22:56,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:22:56,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:22:56,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:22:56,405 INFO L87 Difference]: Start difference. First operand 294 states and 396 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-02 12:22:56,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:22:56,987 INFO L93 Difference]: Finished difference Result 577 states and 798 transitions. [2024-11-02 12:22:56,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 12:22:56,988 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2024-11-02 12:22:56,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:22:56,993 INFO L225 Difference]: With dead ends: 577 [2024-11-02 12:22:56,993 INFO L226 Difference]: Without dead ends: 515 [2024-11-02 12:22:56,994 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:22:56,996 INFO L432 NwaCegarLoop]: 187 mSDtfsCounter, 410 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-02 12:22:56,997 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 418 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-02 12:22:56,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2024-11-02 12:22:57,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 504. [2024-11-02 12:22:57,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 381 states have (on average 1.3385826771653544) internal successors, (510), 389 states have internal predecessors, (510), 78 states have call successors, (78), 44 states have call predecessors, (78), 43 states have return successors, (94), 71 states have call predecessors, (94), 76 states have call successors, (94) [2024-11-02 12:22:57,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 682 transitions. [2024-11-02 12:22:57,132 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 682 transitions. Word has length 34 [2024-11-02 12:22:57,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:22:57,133 INFO L471 AbstractCegarLoop]: Abstraction has 504 states and 682 transitions. [2024-11-02 12:22:57,133 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-02 12:22:57,133 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 682 transitions. [2024-11-02 12:22:57,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-02 12:22:57,139 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:22:57,139 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:22:57,139 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 12:22:57,140 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:22:57,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:22:57,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1275912647, now seen corresponding path program 1 times [2024-11-02 12:22:57,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:22:57,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655211927] [2024-11-02 12:22:57,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:22:57,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:22:57,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:22:57,262 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:22:57,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:22:57,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655211927] [2024-11-02 12:22:57,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655211927] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:22:57,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:22:57,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:22:57,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065914113] [2024-11-02 12:22:57,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:22:57,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:22:57,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:22:57,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:22:57,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:22:57,267 INFO L87 Difference]: Start difference. First operand 504 states and 682 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-02 12:22:57,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:22:57,402 INFO L93 Difference]: Finished difference Result 667 states and 900 transitions. [2024-11-02 12:22:57,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:22:57,403 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2024-11-02 12:22:57,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:22:57,406 INFO L225 Difference]: With dead ends: 667 [2024-11-02 12:22:57,408 INFO L226 Difference]: Without dead ends: 509 [2024-11-02 12:22:57,409 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:22:57,411 INFO L432 NwaCegarLoop]: 166 mSDtfsCounter, 32 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:22:57,412 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 297 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:22:57,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2024-11-02 12:22:57,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 498. [2024-11-02 12:22:57,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 375 states have (on average 1.3226666666666667) internal successors, (496), 383 states have internal predecessors, (496), 78 states have call successors, (78), 44 states have call predecessors, (78), 43 states have return successors, (94), 71 states have call predecessors, (94), 76 states have call successors, (94) [2024-11-02 12:22:57,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 668 transitions. [2024-11-02 12:22:57,483 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 668 transitions. Word has length 43 [2024-11-02 12:22:57,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:22:57,484 INFO L471 AbstractCegarLoop]: Abstraction has 498 states and 668 transitions. [2024-11-02 12:22:57,484 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-02 12:22:57,484 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 668 transitions. [2024-11-02 12:22:57,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-02 12:22:57,487 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:22:57,487 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:22:57,488 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-02 12:22:57,488 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:22:57,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:22:57,490 INFO L85 PathProgramCache]: Analyzing trace with hash 223786346, now seen corresponding path program 1 times [2024-11-02 12:22:57,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:22:57,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416205811] [2024-11-02 12:22:57,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:22:57,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:22:57,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:22:57,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-02 12:22:57,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:22:57,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416205811] [2024-11-02 12:22:57,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416205811] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:22:57,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:22:57,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:22:57,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516061925] [2024-11-02 12:22:57,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:22:57,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:22:57,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:22:57,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:22:57,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:22:57,559 INFO L87 Difference]: Start difference. First operand 498 states and 668 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-02 12:22:57,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:22:57,684 INFO L93 Difference]: Finished difference Result 747 states and 992 transitions. [2024-11-02 12:22:57,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:22:57,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2024-11-02 12:22:57,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:22:57,688 INFO L225 Difference]: With dead ends: 747 [2024-11-02 12:22:57,690 INFO L226 Difference]: Without dead ends: 544 [2024-11-02 12:22:57,691 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:22:57,693 INFO L432 NwaCegarLoop]: 133 mSDtfsCounter, 124 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:22:57,695 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 185 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:22:57,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2024-11-02 12:22:57,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 544. [2024-11-02 12:22:57,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 414 states have (on average 1.3019323671497585) internal successors, (539), 422 states have internal predecessors, (539), 82 states have call successors, (82), 47 states have call predecessors, (82), 46 states have return successors, (98), 75 states have call predecessors, (98), 80 states have call successors, (98) [2024-11-02 12:22:57,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 719 transitions. [2024-11-02 12:22:57,765 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 719 transitions. Word has length 46 [2024-11-02 12:22:57,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:22:57,766 INFO L471 AbstractCegarLoop]: Abstraction has 544 states and 719 transitions. [2024-11-02 12:22:57,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-02 12:22:57,766 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 719 transitions. [2024-11-02 12:22:57,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-02 12:22:57,768 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:22:57,769 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:22:57,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-02 12:22:57,769 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:22:57,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:22:57,770 INFO L85 PathProgramCache]: Analyzing trace with hash 314522590, now seen corresponding path program 1 times [2024-11-02 12:22:57,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:22:57,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675498672] [2024-11-02 12:22:57,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:22:57,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:22:57,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:22:57,886 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-02 12:22:57,886 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:22:57,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675498672] [2024-11-02 12:22:57,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675498672] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:22:57,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:22:57,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:22:57,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132669702] [2024-11-02 12:22:57,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:22:57,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:22:57,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:22:57,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:22:57,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:22:57,890 INFO L87 Difference]: Start difference. First operand 544 states and 719 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-02 12:22:58,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:22:58,127 INFO L93 Difference]: Finished difference Result 584 states and 766 transitions. [2024-11-02 12:22:58,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:22:58,129 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2024-11-02 12:22:58,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:22:58,133 INFO L225 Difference]: With dead ends: 584 [2024-11-02 12:22:58,133 INFO L226 Difference]: Without dead ends: 581 [2024-11-02 12:22:58,134 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:22:58,135 INFO L432 NwaCegarLoop]: 143 mSDtfsCounter, 236 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:22:58,138 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 184 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:22:58,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2024-11-02 12:22:58,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 543. [2024-11-02 12:22:58,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 414 states have (on average 1.2971014492753623) internal successors, (537), 421 states have internal predecessors, (537), 81 states have call successors, (81), 47 states have call predecessors, (81), 46 states have return successors, (98), 75 states have call predecessors, (98), 80 states have call successors, (98) [2024-11-02 12:22:58,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 716 transitions. [2024-11-02 12:22:58,221 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 716 transitions. Word has length 47 [2024-11-02 12:22:58,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:22:58,222 INFO L471 AbstractCegarLoop]: Abstraction has 543 states and 716 transitions. [2024-11-02 12:22:58,223 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-02 12:22:58,223 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 716 transitions. [2024-11-02 12:22:58,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-02 12:22:58,224 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:22:58,224 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:22:58,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-02 12:22:58,225 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:22:58,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:22:58,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1159677741, now seen corresponding path program 1 times [2024-11-02 12:22:58,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:22:58,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045189633] [2024-11-02 12:22:58,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:22:58,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:22:58,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:22:58,439 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-02 12:22:58,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:22:58,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045189633] [2024-11-02 12:22:58,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045189633] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:22:58,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520415124] [2024-11-02 12:22:58,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:22:58,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:22:58,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:22:58,445 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:22:58,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:22:58,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:22:58,557 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-02 12:22:58,563 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:22:58,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:22:58,894 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:22:59,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-02 12:22:59,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520415124] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:22:59,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [669703251] [2024-11-02 12:22:59,029 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2024-11-02 12:22:59,030 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:22:59,034 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:22:59,040 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:22:59,040 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:23:01,824 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 71 for LOIs [2024-11-02 12:23:01,840 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 96 for LOIs [2024-11-02 12:23:01,873 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify_threads with input of size 105 for LOIs [2024-11-02 12:23:02,584 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:23:10,737 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9239#(and (exists ((|v_ULTIMATE.start_eval1_~tmp___0~1#1_11| Int)) (and (not (= |v_ULTIMATE.start_eval1_~tmp___0~1#1_11| 0)) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp___0~1#1_11| 2147483648)) (<= |v_ULTIMATE.start_eval1_~tmp___0~1#1_11| 2147483647))) (<= 1 |#StackHeapBarrier|) (= ~q_buf_0~0 0) (= ~t1_pc~0 0) (not (= ~p_num_write~0 1)) (= ~p_last_write~0 0) (= ~T1_E~0 2) (= ~m_st~0 0) (= ~q_free~0 1) (= ~c_last_read~0 0) (<= 0 ~p_num_write~0) (= 1 ~c_dr_i~0) (= ~t1_st~0 0) (= ~c_num_read~0 1) (<= ~p_num_write~0 1) (= ~m_i~0 0) (= ~p_dw_pc~0 1) (= ~q_write_ev~0 2) (= ~p_dw_st~0 0) (= ~local~0 0) (= ~token~0 0) (= ~q_read_ev~0 2) (= ~c_dr_pc~0 0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (= ~E_M~0 2) (= ~a_t~0 0) (= ~E_1~0 2) (= ~M_E~0 2) (= ~t1_i~0 0))' at error location [2024-11-02 12:23:10,737 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:23:10,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:23:10,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2024-11-02 12:23:10,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337131565] [2024-11-02 12:23:10,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:23:10,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-02 12:23:10,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:23:10,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-02 12:23:10,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2024-11-02 12:23:10,741 INFO L87 Difference]: Start difference. First operand 543 states and 716 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-02 12:23:11,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:23:11,234 INFO L93 Difference]: Finished difference Result 986 states and 1284 transitions. [2024-11-02 12:23:11,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-02 12:23:11,235 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 48 [2024-11-02 12:23:11,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:23:11,242 INFO L225 Difference]: With dead ends: 986 [2024-11-02 12:23:11,242 INFO L226 Difference]: Without dead ends: 983 [2024-11-02 12:23:11,244 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 113 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2024-11-02 12:23:11,245 INFO L432 NwaCegarLoop]: 189 mSDtfsCounter, 339 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-02 12:23:11,245 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 638 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-02 12:23:11,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2024-11-02 12:23:11,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 752. [2024-11-02 12:23:11,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 591 states have (on average 1.3028764805414552) internal successors, (770), 600 states have internal predecessors, (770), 100 states have call successors, (100), 60 states have call predecessors, (100), 59 states have return successors, (117), 92 states have call predecessors, (117), 99 states have call successors, (117) [2024-11-02 12:23:11,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 987 transitions. [2024-11-02 12:23:11,334 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 987 transitions. Word has length 48 [2024-11-02 12:23:11,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:23:11,335 INFO L471 AbstractCegarLoop]: Abstraction has 752 states and 987 transitions. [2024-11-02 12:23:11,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-02 12:23:11,336 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 987 transitions. [2024-11-02 12:23:11,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-02 12:23:11,339 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:23:11,340 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:23:11,368 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-02 12:23:11,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:23:11,544 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:23:11,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:23:11,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1319616121, now seen corresponding path program 1 times [2024-11-02 12:23:11,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:23:11,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6498971] [2024-11-02 12:23:11,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:11,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:23:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:11,838 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-02 12:23:11,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:23:11,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6498971] [2024-11-02 12:23:11,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6498971] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:23:11,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:23:11,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-02 12:23:11,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461625585] [2024-11-02 12:23:11,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:23:11,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 12:23:11,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:23:11,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 12:23:11,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:23:11,841 INFO L87 Difference]: Start difference. First operand 752 states and 987 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-02 12:23:12,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:23:12,352 INFO L93 Difference]: Finished difference Result 1184 states and 1579 transitions. [2024-11-02 12:23:12,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-02 12:23:12,354 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 60 [2024-11-02 12:23:12,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:23:12,360 INFO L225 Difference]: With dead ends: 1184 [2024-11-02 12:23:12,361 INFO L226 Difference]: Without dead ends: 913 [2024-11-02 12:23:12,363 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2024-11-02 12:23:12,364 INFO L432 NwaCegarLoop]: 135 mSDtfsCounter, 231 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 12:23:12,364 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 327 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 12:23:12,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2024-11-02 12:23:12,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 901. [2024-11-02 12:23:12,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 692 states have (on average 1.2904624277456647) internal successors, (893), 703 states have internal predecessors, (893), 130 states have call successors, (130), 78 states have call predecessors, (130), 77 states have return successors, (159), 120 states have call predecessors, (159), 129 states have call successors, (159) [2024-11-02 12:23:12,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1182 transitions. [2024-11-02 12:23:12,479 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1182 transitions. Word has length 60 [2024-11-02 12:23:12,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:23:12,480 INFO L471 AbstractCegarLoop]: Abstraction has 901 states and 1182 transitions. [2024-11-02 12:23:12,480 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-02 12:23:12,480 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1182 transitions. [2024-11-02 12:23:12,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-02 12:23:12,483 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:23:12,483 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:23:12,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-02 12:23:12,484 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:23:12,484 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:23:12,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1015029342, now seen corresponding path program 1 times [2024-11-02 12:23:12,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:23:12,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622954521] [2024-11-02 12:23:12,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:12,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:23:12,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:12,558 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-02 12:23:12,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:23:12,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622954521] [2024-11-02 12:23:12,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622954521] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:23:12,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:23:12,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:23:12,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461130968] [2024-11-02 12:23:12,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:23:12,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:23:12,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:23:12,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:23:12,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:23:12,560 INFO L87 Difference]: Start difference. First operand 901 states and 1182 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-02 12:23:12,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:23:12,786 INFO L93 Difference]: Finished difference Result 1361 states and 1807 transitions. [2024-11-02 12:23:12,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:23:12,787 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2024-11-02 12:23:12,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:23:12,795 INFO L225 Difference]: With dead ends: 1361 [2024-11-02 12:23:12,795 INFO L226 Difference]: Without dead ends: 994 [2024-11-02 12:23:12,797 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:23:12,798 INFO L432 NwaCegarLoop]: 163 mSDtfsCounter, 28 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:23:12,799 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 293 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:23:12,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2024-11-02 12:23:12,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 938. [2024-11-02 12:23:12,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 723 states have (on average 1.2918395573997234) internal successors, (934), 734 states have internal predecessors, (934), 133 states have call successors, (133), 81 states have call predecessors, (133), 80 states have return successors, (162), 123 states have call predecessors, (162), 132 states have call successors, (162) [2024-11-02 12:23:12,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1229 transitions. [2024-11-02 12:23:12,990 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1229 transitions. Word has length 62 [2024-11-02 12:23:12,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:23:12,991 INFO L471 AbstractCegarLoop]: Abstraction has 938 states and 1229 transitions. [2024-11-02 12:23:12,991 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-02 12:23:12,992 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1229 transitions. [2024-11-02 12:23:12,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-02 12:23:12,995 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:23:12,996 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:23:12,996 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-02 12:23:12,996 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:23:12,997 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:23:12,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1904568760, now seen corresponding path program 2 times [2024-11-02 12:23:12,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:23:12,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836961067] [2024-11-02 12:23:12,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:12,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:23:13,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:13,052 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-02 12:23:13,052 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:23:13,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836961067] [2024-11-02 12:23:13,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836961067] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:23:13,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:23:13,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:23:13,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171145623] [2024-11-02 12:23:13,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:23:13,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:23:13,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:23:13,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:23:13,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:23:13,056 INFO L87 Difference]: Start difference. First operand 938 states and 1229 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-02 12:23:13,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:23:13,264 INFO L93 Difference]: Finished difference Result 1268 states and 1662 transitions. [2024-11-02 12:23:13,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:23:13,265 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 61 [2024-11-02 12:23:13,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:23:13,272 INFO L225 Difference]: With dead ends: 1268 [2024-11-02 12:23:13,272 INFO L226 Difference]: Without dead ends: 880 [2024-11-02 12:23:13,274 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:23:13,275 INFO L432 NwaCegarLoop]: 156 mSDtfsCounter, 137 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:23:13,275 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 201 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:23:13,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2024-11-02 12:23:13,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 871. [2024-11-02 12:23:13,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 666 states have (on average 1.2807807807807807) internal successors, (853), 678 states have internal predecessors, (853), 127 states have call successors, (127), 77 states have call predecessors, (127), 76 states have return successors, (156), 116 states have call predecessors, (156), 126 states have call successors, (156) [2024-11-02 12:23:13,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 1136 transitions. [2024-11-02 12:23:13,381 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 1136 transitions. Word has length 61 [2024-11-02 12:23:13,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:23:13,382 INFO L471 AbstractCegarLoop]: Abstraction has 871 states and 1136 transitions. [2024-11-02 12:23:13,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-02 12:23:13,382 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 1136 transitions. [2024-11-02 12:23:13,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-02 12:23:13,385 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:23:13,385 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:23:13,385 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-02 12:23:13,385 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:23:13,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:23:13,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1896265867, now seen corresponding path program 1 times [2024-11-02 12:23:13,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:23:13,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252359417] [2024-11-02 12:23:13,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:13,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:23:13,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:13,522 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-02 12:23:13,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:23:13,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252359417] [2024-11-02 12:23:13,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252359417] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:23:13,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951498470] [2024-11-02 12:23:13,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:13,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:23:13,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:23:13,526 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:23:13,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:23:13,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:13,641 INFO L255 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-02 12:23:13,644 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:23:13,680 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-02 12:23:13,685 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:23:13,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951498470] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:23:13,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:23:13,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-02 12:23:13,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492754712] [2024-11-02 12:23:13,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:23:13,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:23:13,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:23:13,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:23:13,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:23:13,689 INFO L87 Difference]: Start difference. First operand 871 states and 1136 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-02 12:23:13,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:23:13,851 INFO L93 Difference]: Finished difference Result 998 states and 1295 transitions. [2024-11-02 12:23:13,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:23:13,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 73 [2024-11-02 12:23:13,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:23:13,857 INFO L225 Difference]: With dead ends: 998 [2024-11-02 12:23:13,857 INFO L226 Difference]: Without dead ends: 464 [2024-11-02 12:23:13,859 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:23:13,860 INFO L432 NwaCegarLoop]: 148 mSDtfsCounter, 25 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:23:13,860 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 268 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:23:13,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2024-11-02 12:23:13,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 464. [2024-11-02 12:23:13,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 323 states have (on average 1.2724458204334366) internal successors, (411), 329 states have internal predecessors, (411), 89 states have call successors, (89), 51 states have call predecessors, (89), 51 states have return successors, (119), 84 states have call predecessors, (119), 89 states have call successors, (119) [2024-11-02 12:23:13,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 619 transitions. [2024-11-02 12:23:13,955 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 619 transitions. Word has length 73 [2024-11-02 12:23:13,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:23:13,956 INFO L471 AbstractCegarLoop]: Abstraction has 464 states and 619 transitions. [2024-11-02 12:23:13,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-02 12:23:13,956 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 619 transitions. [2024-11-02 12:23:13,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-02 12:23:13,961 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:23:13,962 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:23:13,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-02 12:23:14,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:23:14,166 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:23:14,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:23:14,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1517649158, now seen corresponding path program 1 times [2024-11-02 12:23:14,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:23:14,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150666355] [2024-11-02 12:23:14,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:14,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:23:14,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:14,297 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-02 12:23:14,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:23:14,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150666355] [2024-11-02 12:23:14,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150666355] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:23:14,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217006401] [2024-11-02 12:23:14,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:14,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:23:14,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:23:14,301 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:23:14,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 12:23:14,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:14,439 INFO L255 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-02 12:23:14,442 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:23:14,510 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-02 12:23:14,510 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:23:14,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217006401] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:23:14,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:23:14,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-02 12:23:14,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899794096] [2024-11-02 12:23:14,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:23:14,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:23:14,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:23:14,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:23:14,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:23:14,513 INFO L87 Difference]: Start difference. First operand 464 states and 619 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-02 12:23:14,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:23:14,635 INFO L93 Difference]: Finished difference Result 881 states and 1185 transitions. [2024-11-02 12:23:14,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:23:14,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 90 [2024-11-02 12:23:14,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:23:14,640 INFO L225 Difference]: With dead ends: 881 [2024-11-02 12:23:14,641 INFO L226 Difference]: Without dead ends: 543 [2024-11-02 12:23:14,642 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:23:14,643 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 59 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:23:14,644 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 94 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:23:14,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2024-11-02 12:23:14,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 528. [2024-11-02 12:23:14,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 378 states have (on average 1.2619047619047619) internal successors, (477), 383 states have internal predecessors, (477), 89 states have call successors, (89), 59 states have call predecessors, (89), 60 states have return successors, (117), 86 states have call predecessors, (117), 89 states have call successors, (117) [2024-11-02 12:23:14,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 683 transitions. [2024-11-02 12:23:14,724 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 683 transitions. Word has length 90 [2024-11-02 12:23:14,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:23:14,724 INFO L471 AbstractCegarLoop]: Abstraction has 528 states and 683 transitions. [2024-11-02 12:23:14,725 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-02 12:23:14,725 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 683 transitions. [2024-11-02 12:23:14,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-02 12:23:14,727 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:23:14,727 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:23:14,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-02 12:23:14,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-02 12:23:14,928 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:23:14,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:23:14,928 INFO L85 PathProgramCache]: Analyzing trace with hash 544160199, now seen corresponding path program 1 times [2024-11-02 12:23:14,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:23:14,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005171267] [2024-11-02 12:23:14,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:14,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:23:14,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:15,024 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-02 12:23:15,025 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:23:15,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005171267] [2024-11-02 12:23:15,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005171267] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:23:15,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046813223] [2024-11-02 12:23:15,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:15,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:23:15,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:23:15,028 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:23:15,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-02 12:23:15,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:15,132 INFO L255 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-02 12:23:15,135 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:23:15,163 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-02 12:23:15,163 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:23:15,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046813223] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:23:15,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:23:15,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-02 12:23:15,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592060219] [2024-11-02 12:23:15,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:23:15,165 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:23:15,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:23:15,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:23:15,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:23:15,166 INFO L87 Difference]: Start difference. First operand 528 states and 683 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-02 12:23:15,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:23:15,290 INFO L93 Difference]: Finished difference Result 1011 states and 1314 transitions. [2024-11-02 12:23:15,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:23:15,291 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 90 [2024-11-02 12:23:15,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:23:15,296 INFO L225 Difference]: With dead ends: 1011 [2024-11-02 12:23:15,296 INFO L226 Difference]: Without dead ends: 626 [2024-11-02 12:23:15,298 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:23:15,299 INFO L432 NwaCegarLoop]: 105 mSDtfsCounter, 37 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:23:15,300 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 180 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:23:15,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2024-11-02 12:23:15,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 556. [2024-11-02 12:23:15,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 400 states have (on average 1.265) internal successors, (506), 405 states have internal predecessors, (506), 92 states have call successors, (92), 62 states have call predecessors, (92), 63 states have return successors, (120), 89 states have call predecessors, (120), 92 states have call successors, (120) [2024-11-02 12:23:15,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 718 transitions. [2024-11-02 12:23:15,385 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 718 transitions. Word has length 90 [2024-11-02 12:23:15,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:23:15,385 INFO L471 AbstractCegarLoop]: Abstraction has 556 states and 718 transitions. [2024-11-02 12:23:15,386 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-02 12:23:15,386 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 718 transitions. [2024-11-02 12:23:15,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-02 12:23:15,388 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:23:15,388 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:23:15,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-02 12:23:15,589 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-02 12:23:15,589 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:23:15,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:23:15,590 INFO L85 PathProgramCache]: Analyzing trace with hash 215129640, now seen corresponding path program 2 times [2024-11-02 12:23:15,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:23:15,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113175066] [2024-11-02 12:23:15,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:15,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:23:15,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:15,799 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-02 12:23:15,800 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:23:15,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113175066] [2024-11-02 12:23:15,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113175066] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:23:15,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341663950] [2024-11-02 12:23:15,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 12:23:15,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:23:15,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:23:15,804 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:23:15,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-02 12:23:15,916 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-02 12:23:15,916 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:23:15,918 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-02 12:23:15,920 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:23:15,971 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-02 12:23:15,971 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:23:15,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341663950] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:23:15,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:23:15,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-02 12:23:15,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029800359] [2024-11-02 12:23:15,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:23:15,973 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:23:15,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:23:15,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:23:15,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:23:15,975 INFO L87 Difference]: Start difference. First operand 556 states and 718 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-02 12:23:16,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:23:16,143 INFO L93 Difference]: Finished difference Result 1081 states and 1438 transitions. [2024-11-02 12:23:16,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:23:16,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 90 [2024-11-02 12:23:16,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:23:16,149 INFO L225 Difference]: With dead ends: 1081 [2024-11-02 12:23:16,149 INFO L226 Difference]: Without dead ends: 668 [2024-11-02 12:23:16,151 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:23:16,152 INFO L432 NwaCegarLoop]: 110 mSDtfsCounter, 59 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:23:16,153 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 175 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:23:16,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2024-11-02 12:23:16,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 648. [2024-11-02 12:23:16,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 470 states have (on average 1.2468085106382978) internal successors, (586), 476 states have internal predecessors, (586), 105 states have call successors, (105), 72 states have call predecessors, (105), 72 states have return successors, (143), 100 states have call predecessors, (143), 105 states have call successors, (143) [2024-11-02 12:23:16,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 834 transitions. [2024-11-02 12:23:16,255 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 834 transitions. Word has length 90 [2024-11-02 12:23:16,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:23:16,256 INFO L471 AbstractCegarLoop]: Abstraction has 648 states and 834 transitions. [2024-11-02 12:23:16,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-02 12:23:16,256 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 834 transitions. [2024-11-02 12:23:16,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-11-02 12:23:16,259 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:23:16,259 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:23:16,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-02 12:23:16,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-02 12:23:16,460 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:23:16,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:23:16,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1858641952, now seen corresponding path program 1 times [2024-11-02 12:23:16,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:23:16,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985233570] [2024-11-02 12:23:16,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:16,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:23:16,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:16,693 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-02 12:23:16,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:23:16,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985233570] [2024-11-02 12:23:16,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985233570] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:23:16,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202447370] [2024-11-02 12:23:16,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:16,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:23:16,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:23:16,697 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:23:16,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-02 12:23:16,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:16,834 INFO L255 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-02 12:23:16,840 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:23:16,879 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-02 12:23:16,879 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:23:16,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202447370] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:23:16,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:23:16,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-02 12:23:16,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687445117] [2024-11-02 12:23:16,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:23:16,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:23:16,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:23:16,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:23:16,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:23:16,884 INFO L87 Difference]: Start difference. First operand 648 states and 834 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-02 12:23:17,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:23:17,080 INFO L93 Difference]: Finished difference Result 1532 states and 1970 transitions. [2024-11-02 12:23:17,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:23:17,080 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 91 [2024-11-02 12:23:17,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:23:17,088 INFO L225 Difference]: With dead ends: 1532 [2024-11-02 12:23:17,089 INFO L226 Difference]: Without dead ends: 891 [2024-11-02 12:23:17,091 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:23:17,092 INFO L432 NwaCegarLoop]: 89 mSDtfsCounter, 34 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:23:17,094 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 152 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:23:17,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2024-11-02 12:23:17,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 718. [2024-11-02 12:23:17,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 524 states have (on average 1.248091603053435) internal successors, (654), 531 states have internal predecessors, (654), 113 states have call successors, (113), 80 states have call predecessors, (113), 80 states have return successors, (151), 107 states have call predecessors, (151), 113 states have call successors, (151) [2024-11-02 12:23:17,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 918 transitions. [2024-11-02 12:23:17,259 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 918 transitions. Word has length 91 [2024-11-02 12:23:17,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:23:17,259 INFO L471 AbstractCegarLoop]: Abstraction has 718 states and 918 transitions. [2024-11-02 12:23:17,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-02 12:23:17,260 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 918 transitions. [2024-11-02 12:23:17,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-02 12:23:17,265 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:23:17,266 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:23:17,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-02 12:23:17,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-02 12:23:17,468 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:23:17,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:23:17,473 INFO L85 PathProgramCache]: Analyzing trace with hash -630482095, now seen corresponding path program 1 times [2024-11-02 12:23:17,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:23:17,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525468575] [2024-11-02 12:23:17,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:17,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:23:17,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:17,661 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-02 12:23:17,661 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:23:17,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525468575] [2024-11-02 12:23:17,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525468575] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:23:17,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:23:17,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:23:17,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470961511] [2024-11-02 12:23:17,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:23:17,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:23:17,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:23:17,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:23:17,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:23:17,664 INFO L87 Difference]: Start difference. First operand 718 states and 918 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-02 12:23:18,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:23:18,103 INFO L93 Difference]: Finished difference Result 1736 states and 2192 transitions. [2024-11-02 12:23:18,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:23:18,103 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 93 [2024-11-02 12:23:18,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:23:18,113 INFO L225 Difference]: With dead ends: 1736 [2024-11-02 12:23:18,113 INFO L226 Difference]: Without dead ends: 1226 [2024-11-02 12:23:18,115 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:23:18,116 INFO L432 NwaCegarLoop]: 128 mSDtfsCounter, 133 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:23:18,117 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 212 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:23:18,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1226 states. [2024-11-02 12:23:18,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1226 to 1188. [2024-11-02 12:23:18,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1188 states, 864 states have (on average 1.2384259259259258) internal successors, (1070), 868 states have internal predecessors, (1070), 191 states have call successors, (191), 132 states have call predecessors, (191), 132 states have return successors, (227), 188 states have call predecessors, (227), 191 states have call successors, (227) [2024-11-02 12:23:18,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 1488 transitions. [2024-11-02 12:23:18,416 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 1488 transitions. Word has length 93 [2024-11-02 12:23:18,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:23:18,416 INFO L471 AbstractCegarLoop]: Abstraction has 1188 states and 1488 transitions. [2024-11-02 12:23:18,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-02 12:23:18,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 1488 transitions. [2024-11-02 12:23:18,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-11-02 12:23:18,420 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:23:18,420 INFO L215 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:23:18,420 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-02 12:23:18,420 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:23:18,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:23:18,421 INFO L85 PathProgramCache]: Analyzing trace with hash 150676872, now seen corresponding path program 1 times [2024-11-02 12:23:18,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:23:18,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913540209] [2024-11-02 12:23:18,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:18,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:23:18,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:18,668 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 17 proven. 14 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-02 12:23:18,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:23:18,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913540209] [2024-11-02 12:23:18,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913540209] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:23:18,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25570102] [2024-11-02 12:23:18,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:18,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:23:18,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:23:18,672 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:23:18,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-02 12:23:18,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:18,807 INFO L255 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-02 12:23:18,810 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:23:18,949 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-02 12:23:18,949 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:23:18,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25570102] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:23:18,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:23:18,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2024-11-02 12:23:18,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745267777] [2024-11-02 12:23:18,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:23:18,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-02 12:23:18,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:23:18,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-02 12:23:18,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-11-02 12:23:18,952 INFO L87 Difference]: Start difference. First operand 1188 states and 1488 transitions. Second operand has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-02 12:23:19,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:23:19,330 INFO L93 Difference]: Finished difference Result 2096 states and 2616 transitions. [2024-11-02 12:23:19,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-02 12:23:19,331 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 100 [2024-11-02 12:23:19,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:23:19,339 INFO L225 Difference]: With dead ends: 2096 [2024-11-02 12:23:19,339 INFO L226 Difference]: Without dead ends: 997 [2024-11-02 12:23:19,343 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-11-02 12:23:19,344 INFO L432 NwaCegarLoop]: 103 mSDtfsCounter, 36 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:23:19,344 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 461 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:23:19,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2024-11-02 12:23:19,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 964. [2024-11-02 12:23:19,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 700 states have (on average 1.2242857142857142) internal successors, (857), 704 states have internal predecessors, (857), 155 states have call successors, (155), 108 states have call predecessors, (155), 108 states have return successors, (175), 152 states have call predecessors, (175), 155 states have call successors, (175) [2024-11-02 12:23:19,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 1187 transitions. [2024-11-02 12:23:19,542 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 1187 transitions. Word has length 100 [2024-11-02 12:23:19,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:23:19,543 INFO L471 AbstractCegarLoop]: Abstraction has 964 states and 1187 transitions. [2024-11-02 12:23:19,543 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-02 12:23:19,543 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 1187 transitions. [2024-11-02 12:23:19,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-02 12:23:19,546 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:23:19,546 INFO L215 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:23:19,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-02 12:23:19,747 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-02 12:23:19,747 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:23:19,748 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:23:19,748 INFO L85 PathProgramCache]: Analyzing trace with hash 144238523, now seen corresponding path program 1 times [2024-11-02 12:23:19,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:23:19,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458182775] [2024-11-02 12:23:19,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:19,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:23:19,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:20,671 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 19 proven. 21 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-02 12:23:20,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:23:20,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458182775] [2024-11-02 12:23:20,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458182775] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:23:20,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061492968] [2024-11-02 12:23:20,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:20,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:23:20,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:23:20,675 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:23:20,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d82365f-b0d7-48aa-9b0d-7704519fc205/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-02 12:23:20,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:20,805 INFO L255 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-02 12:23:20,808 INFO L278 TraceCheckSpWp]: Computing forward predicates...