./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.06.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.06.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh --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 254b993103fdf4bf9ce113a41b03b165c45b47461a75aeb8bd9480761428c91e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 13:31:05,242 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 13:31:05,314 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 13:31:05,319 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 13:31:05,319 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 13:31:05,342 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 13:31:05,342 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 13:31:05,343 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 13:31:05,344 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 13:31:05,344 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 13:31:05,345 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 13:31:05,345 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 13:31:05,346 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 13:31:05,346 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 13:31:05,347 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 13:31:05,347 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 13:31:05,347 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 13:31:05,348 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 13:31:05,348 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 13:31:05,349 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 13:31:05,349 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 13:31:05,350 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 13:31:05,351 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 13:31:05,351 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 13:31:05,352 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 13:31:05,352 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 13:31:05,352 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 13:31:05,353 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 13:31:05,353 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 13:31:05,353 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 13:31:05,354 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 13:31:05,354 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 13:31:05,354 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 13:31:05,355 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 13:31:05,355 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 13:31:05,355 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 13:31:05,355 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 13:31:05,355 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:31:05,356 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 13:31:05,356 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 13:31:05,356 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 13:31:05,356 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 13:31:05,357 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 13:31:05,357 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 13:31:05,357 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 13:31:05,357 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 13:31:05,357 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 13:31:05,357 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_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 254b993103fdf4bf9ce113a41b03b165c45b47461a75aeb8bd9480761428c91e [2023-12-02 13:31:05,580 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 13:31:05,600 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 13:31:05,603 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 13:31:05,604 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 13:31:05,604 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 13:31:05,606 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.06.cil-2.c [2023-12-02 13:31:08,299 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 13:31:08,911 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 13:31:08,912 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/sv-benchmarks/c/combinations/Problem05_label42+token_ring.06.cil-2.c [2023-12-02 13:31:08,961 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/data/54cb9ec96/cd172a5d5ebb4bd0958a012818e62deb/FLAG20014b9e4 [2023-12-02 13:31:08,976 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/data/54cb9ec96/cd172a5d5ebb4bd0958a012818e62deb [2023-12-02 13:31:08,979 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 13:31:08,981 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 13:31:08,982 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 13:31:08,982 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 13:31:08,988 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 13:31:08,988 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:31:08" (1/1) ... [2023-12-02 13:31:08,990 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c152d77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:31:08, skipping insertion in model container [2023-12-02 13:31:08,990 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:31:08" (1/1) ... [2023-12-02 13:31:09,310 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 13:31:11,202 WARN L240 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_a5a54a1a-b877-47a4-972b-ced623cb44fd/sv-benchmarks/c/combinations/Problem05_label42+token_ring.06.cil-2.c[378560,378573] [2023-12-02 13:31:11,234 WARN L240 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_a5a54a1a-b877-47a4-972b-ced623cb44fd/sv-benchmarks/c/combinations/Problem05_label42+token_ring.06.cil-2.c[383339,383352] [2023-12-02 13:31:11,462 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:31:11,474 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 13:31:12,410 WARN L240 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_a5a54a1a-b877-47a4-972b-ced623cb44fd/sv-benchmarks/c/combinations/Problem05_label42+token_ring.06.cil-2.c[378560,378573] [2023-12-02 13:31:12,418 WARN L240 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_a5a54a1a-b877-47a4-972b-ced623cb44fd/sv-benchmarks/c/combinations/Problem05_label42+token_ring.06.cil-2.c[383339,383352] [2023-12-02 13:31:12,432 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:31:12,495 INFO L206 MainTranslator]: Completed translation [2023-12-02 13:31:12,496 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:31:12 WrapperNode [2023-12-02 13:31:12,496 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 13:31:12,497 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 13:31:12,497 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 13:31:12,497 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 13:31:12,503 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:31:12" (1/1) ... [2023-12-02 13:31:12,577 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:31:12" (1/1) ... [2023-12-02 13:31:12,862 INFO L138 Inliner]: procedures = 56, calls = 59, calls flagged for inlining = 34, calls inlined = 34, statements flattened = 12868 [2023-12-02 13:31:12,862 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 13:31:12,863 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 13:31:12,863 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 13:31:12,863 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 13:31:12,872 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:31:12" (1/1) ... [2023-12-02 13:31:12,873 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:31:12" (1/1) ... [2023-12-02 13:31:13,014 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:31:12" (1/1) ... [2023-12-02 13:31:13,014 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:31:12" (1/1) ... [2023-12-02 13:31:13,228 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:31:12" (1/1) ... [2023-12-02 13:31:13,286 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:31:12" (1/1) ... [2023-12-02 13:31:13,366 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:31:12" (1/1) ... [2023-12-02 13:31:13,385 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:31:12" (1/1) ... [2023-12-02 13:31:13,465 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 13:31:13,466 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 13:31:13,466 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 13:31:13,466 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 13:31:13,467 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:31:12" (1/1) ... [2023-12-02 13:31:13,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:31:13,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:31:13,513 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 13:31:13,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 13:31:13,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 13:31:13,544 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-12-02 13:31:13,545 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-12-02 13:31:13,545 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-12-02 13:31:13,545 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-12-02 13:31:13,545 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-12-02 13:31:13,545 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-12-02 13:31:13,545 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-12-02 13:31:13,545 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-12-02 13:31:13,545 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-12-02 13:31:13,546 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-12-02 13:31:13,546 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-12-02 13:31:13,546 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-12-02 13:31:13,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 13:31:13,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 13:31:13,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 13:31:13,644 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 13:31:13,646 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 13:31:21,400 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 13:31:23,263 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 13:31:23,263 INFO L309 CfgBuilder]: Removed 10 assume(true) statements. [2023-12-02 13:31:23,266 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:31:23 BoogieIcfgContainer [2023-12-02 13:31:23,266 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 13:31:23,269 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 13:31:23,269 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 13:31:23,271 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 13:31:23,272 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:31:08" (1/3) ... [2023-12-02 13:31:23,272 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29e5f9db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:31:23, skipping insertion in model container [2023-12-02 13:31:23,272 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:31:12" (2/3) ... [2023-12-02 13:31:23,273 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29e5f9db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:31:23, skipping insertion in model container [2023-12-02 13:31:23,273 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:31:23" (3/3) ... [2023-12-02 13:31:23,274 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label42+token_ring.06.cil-2.c [2023-12-02 13:31:23,289 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 13:31:23,290 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-02 13:31:23,371 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 13:31:23,377 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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;@2cbb51d9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 13:31:23,378 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-02 13:31:23,389 INFO L276 IsEmpty]: Start isEmpty. Operand has 1772 states, 1743 states have (on average 1.9644291451520368) internal successors, (3424), 1746 states have internal predecessors, (3424), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-12-02 13:31:23,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-02 13:31:23,399 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:31:23,400 INFO L195 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:31:23,401 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:31:23,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:31:23,406 INFO L85 PathProgramCache]: Analyzing trace with hash 502497873, now seen corresponding path program 1 times [2023-12-02 13:31:23,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:31:23,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741322596] [2023-12-02 13:31:23,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:31:23,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:31:23,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:31:23,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:31:23,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:31:23,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741322596] [2023-12-02 13:31:23,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741322596] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:31:23,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:31:23,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 13:31:23,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674737228] [2023-12-02 13:31:23,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:31:23,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:31:23,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:31:23,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:31:23,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:31:23,827 INFO L87 Difference]: Start difference. First operand has 1772 states, 1743 states have (on average 1.9644291451520368) internal successors, (3424), 1746 states have internal predecessors, (3424), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) [2023-12-02 13:31:24,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:31:24,783 INFO L93 Difference]: Finished difference Result 3656 states and 7112 transitions. [2023-12-02 13:31:24,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:31:24,785 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 49 [2023-12-02 13:31:24,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:31:24,810 INFO L225 Difference]: With dead ends: 3656 [2023-12-02 13:31:24,810 INFO L226 Difference]: Without dead ends: 1883 [2023-12-02 13:31:24,824 INFO L412 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 [2023-12-02 13:31:24,828 INFO L413 NwaCegarLoop]: 3345 mSDtfsCounter, 3595 mSDsluCounter, 3271 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3595 SdHoareTripleChecker+Valid, 6616 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 13:31:24,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3595 Valid, 6616 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 13:31:24,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2023-12-02 13:31:24,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 1882. [2023-12-02 13:31:24,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1882 states, 1832 states have (on average 1.9334061135371179) internal successors, (3542), 1835 states have internal predecessors, (3542), 36 states have call successors, (36), 12 states have call predecessors, (36), 12 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2023-12-02 13:31:24,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 3614 transitions. [2023-12-02 13:31:24,952 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 3614 transitions. Word has length 49 [2023-12-02 13:31:24,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:31:24,953 INFO L495 AbstractCegarLoop]: Abstraction has 1882 states and 3614 transitions. [2023-12-02 13:31:24,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) [2023-12-02 13:31:24,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 3614 transitions. [2023-12-02 13:31:24,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-12-02 13:31:24,960 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:31:24,961 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:31:24,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 13:31:24,961 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:31:24,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:31:24,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1818543418, now seen corresponding path program 1 times [2023-12-02 13:31:24,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:31:24,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533467472] [2023-12-02 13:31:24,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:31:24,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:31:24,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:31:25,191 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 13:31:25,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:31:25,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533467472] [2023-12-02 13:31:25,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533467472] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:31:25,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028849997] [2023-12-02 13:31:25,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:31:25,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:31:25,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:31:25,201 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:31:25,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 13:31:25,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:31:25,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:31:25,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:31:25,446 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 13:31:25,447 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:31:25,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028849997] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:31:25,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:31:25,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 13:31:25,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519519745] [2023-12-02 13:31:25,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:31:25,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:31:25,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:31:25,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:31:25,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:31:25,451 INFO L87 Difference]: Start difference. First operand 1882 states and 3614 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 13:31:25,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:31:25,920 INFO L93 Difference]: Finished difference Result 2347 states and 4297 transitions. [2023-12-02 13:31:25,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:31:25,920 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 95 [2023-12-02 13:31:25,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:31:25,937 INFO L225 Difference]: With dead ends: 2347 [2023-12-02 13:31:25,937 INFO L226 Difference]: Without dead ends: 2111 [2023-12-02 13:31:25,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:31:25,941 INFO L413 NwaCegarLoop]: 3247 mSDtfsCounter, 3424 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3424 SdHoareTripleChecker+Valid, 3389 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:31:25,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3424 Valid, 3389 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:31:25,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2111 states. [2023-12-02 13:31:26,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2111 to 2107. [2023-12-02 13:31:26,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2107 states, 2015 states have (on average 1.8863523573200993) internal successors, (3801), 2019 states have internal predecessors, (3801), 66 states have call successors, (66), 24 states have call predecessors, (66), 24 states have return successors, (66), 64 states have call predecessors, (66), 66 states have call successors, (66) [2023-12-02 13:31:26,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2107 states to 2107 states and 3933 transitions. [2023-12-02 13:31:26,027 INFO L78 Accepts]: Start accepts. Automaton has 2107 states and 3933 transitions. Word has length 95 [2023-12-02 13:31:26,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:31:26,028 INFO L495 AbstractCegarLoop]: Abstraction has 2107 states and 3933 transitions. [2023-12-02 13:31:26,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 13:31:26,028 INFO L276 IsEmpty]: Start isEmpty. Operand 2107 states and 3933 transitions. [2023-12-02 13:31:26,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-12-02 13:31:26,033 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:31:26,034 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:31:26,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 13:31:26,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:31:26,235 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:31:26,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:31:26,235 INFO L85 PathProgramCache]: Analyzing trace with hash 852706790, now seen corresponding path program 1 times [2023-12-02 13:31:26,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:31:26,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836642594] [2023-12-02 13:31:26,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:31:26,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:31:26,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:31:26,410 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 13:31:26,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:31:26,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836642594] [2023-12-02 13:31:26,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836642594] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:31:26,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498152109] [2023-12-02 13:31:26,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:31:26,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:31:26,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:31:26,413 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:31:26,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 13:31:26,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:31:26,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:31:26,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:31:26,624 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 13:31:26,625 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:31:26,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498152109] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:31:26,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:31:26,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 13:31:26,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845602512] [2023-12-02 13:31:26,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:31:26,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:31:26,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:31:26,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:31:26,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:31:26,628 INFO L87 Difference]: Start difference. First operand 2107 states and 3933 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 13:31:27,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:31:27,128 INFO L93 Difference]: Finished difference Result 3016 states and 5260 transitions. [2023-12-02 13:31:27,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:31:27,129 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 95 [2023-12-02 13:31:27,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:31:27,146 INFO L225 Difference]: With dead ends: 3016 [2023-12-02 13:31:27,146 INFO L226 Difference]: Without dead ends: 2555 [2023-12-02 13:31:27,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:31:27,151 INFO L413 NwaCegarLoop]: 3206 mSDtfsCounter, 3418 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3418 SdHoareTripleChecker+Valid, 3348 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:31:27,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3418 Valid, 3348 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:31:27,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2555 states. [2023-12-02 13:31:27,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2555 to 2549. [2023-12-02 13:31:27,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2549 states, 2375 states have (on average 1.8134736842105263) internal successors, (4307), 2381 states have internal predecessors, (4307), 124 states have call successors, (124), 48 states have call predecessors, (124), 48 states have return successors, (124), 120 states have call predecessors, (124), 124 states have call successors, (124) [2023-12-02 13:31:27,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2549 states to 2549 states and 4555 transitions. [2023-12-02 13:31:27,258 INFO L78 Accepts]: Start accepts. Automaton has 2549 states and 4555 transitions. Word has length 95 [2023-12-02 13:31:27,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:31:27,258 INFO L495 AbstractCegarLoop]: Abstraction has 2549 states and 4555 transitions. [2023-12-02 13:31:27,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 13:31:27,259 INFO L276 IsEmpty]: Start isEmpty. Operand 2549 states and 4555 transitions. [2023-12-02 13:31:27,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-12-02 13:31:27,263 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:31:27,263 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:31:27,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 13:31:27,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:31:27,464 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:31:27,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:31:27,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1933191430, now seen corresponding path program 1 times [2023-12-02 13:31:27,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:31:27,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885712219] [2023-12-02 13:31:27,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:31:27,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:31:27,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:31:27,594 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 13:31:27,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:31:27,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885712219] [2023-12-02 13:31:27,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885712219] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:31:27,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518531812] [2023-12-02 13:31:27,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:31:27,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:31:27,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:31:27,599 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:31:27,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 13:31:27,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:31:27,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:31:27,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:31:27,821 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 13:31:27,821 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:31:27,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518531812] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:31:27,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:31:27,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 13:31:27,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976809053] [2023-12-02 13:31:27,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:31:27,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:31:27,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:31:27,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:31:27,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:31:27,824 INFO L87 Difference]: Start difference. First operand 2549 states and 4555 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 2 states have internal predecessors, (59), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 13:31:28,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:31:28,358 INFO L93 Difference]: Finished difference Result 4330 states and 7136 transitions. [2023-12-02 13:31:28,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:31:28,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 2 states have internal predecessors, (59), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 95 [2023-12-02 13:31:28,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:31:28,382 INFO L225 Difference]: With dead ends: 4330 [2023-12-02 13:31:28,382 INFO L226 Difference]: Without dead ends: 3427 [2023-12-02 13:31:28,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:31:28,389 INFO L413 NwaCegarLoop]: 3206 mSDtfsCounter, 3427 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3427 SdHoareTripleChecker+Valid, 3348 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:31:28,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3427 Valid, 3348 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:31:28,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3427 states. [2023-12-02 13:31:28,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3427 to 3417. [2023-12-02 13:31:28,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3417 states, 3083 states have (on average 1.7174829711320143) internal successors, (5295), 3093 states have internal predecessors, (5295), 236 states have call successors, (236), 96 states have call predecessors, (236), 96 states have return successors, (236), 228 states have call predecessors, (236), 236 states have call successors, (236) [2023-12-02 13:31:28,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3417 states to 3417 states and 5767 transitions. [2023-12-02 13:31:28,682 INFO L78 Accepts]: Start accepts. Automaton has 3417 states and 5767 transitions. Word has length 95 [2023-12-02 13:31:28,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:31:28,682 INFO L495 AbstractCegarLoop]: Abstraction has 3417 states and 5767 transitions. [2023-12-02 13:31:28,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 2 states have internal predecessors, (59), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 13:31:28,683 INFO L276 IsEmpty]: Start isEmpty. Operand 3417 states and 5767 transitions. [2023-12-02 13:31:28,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-12-02 13:31:28,689 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:31:28,690 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:31:28,697 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 13:31:28,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:31:28,891 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:31:28,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:31:28,892 INFO L85 PathProgramCache]: Analyzing trace with hash -300889626, now seen corresponding path program 1 times [2023-12-02 13:31:28,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:31:28,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021726835] [2023-12-02 13:31:28,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:31:28,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:31:28,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:31:28,993 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-02 13:31:28,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:31:28,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021726835] [2023-12-02 13:31:28,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021726835] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:31:28,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:31:28,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:31:28,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295714536] [2023-12-02 13:31:28,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:31:28,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:31:28,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:31:28,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:31:28,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:31:28,998 INFO L87 Difference]: Start difference. First operand 3417 states and 5767 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2023-12-02 13:31:29,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:31:29,664 INFO L93 Difference]: Finished difference Result 4819 states and 7792 transitions. [2023-12-02 13:31:29,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:31:29,665 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 95 [2023-12-02 13:31:29,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:31:29,690 INFO L225 Difference]: With dead ends: 4819 [2023-12-02 13:31:29,690 INFO L226 Difference]: Without dead ends: 3913 [2023-12-02 13:31:29,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:31:29,695 INFO L413 NwaCegarLoop]: 3290 mSDtfsCounter, 79 mSDsluCounter, 3213 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 6503 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 13:31:29,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 6503 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 13:31:29,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3913 states. [2023-12-02 13:31:29,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3913 to 3757. [2023-12-02 13:31:29,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3757 states, 3407 states have (on average 1.7044320516583504) internal successors, (5807), 3417 states have internal predecessors, (5807), 244 states have call successors, (244), 104 states have call predecessors, (244), 104 states have return successors, (244), 236 states have call predecessors, (244), 244 states have call successors, (244) [2023-12-02 13:31:29,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3757 states to 3757 states and 6295 transitions. [2023-12-02 13:31:29,837 INFO L78 Accepts]: Start accepts. Automaton has 3757 states and 6295 transitions. Word has length 95 [2023-12-02 13:31:29,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:31:29,838 INFO L495 AbstractCegarLoop]: Abstraction has 3757 states and 6295 transitions. [2023-12-02 13:31:29,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2023-12-02 13:31:29,839 INFO L276 IsEmpty]: Start isEmpty. Operand 3757 states and 6295 transitions. [2023-12-02 13:31:29,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-12-02 13:31:29,845 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:31:29,845 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:31:29,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 13:31:29,846 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:31:29,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:31:29,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1773734092, now seen corresponding path program 1 times [2023-12-02 13:31:29,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:31:29,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771503674] [2023-12-02 13:31:29,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:31:29,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:31:29,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:31:29,922 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-12-02 13:31:29,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:31:29,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771503674] [2023-12-02 13:31:29,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771503674] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:31:29,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:31:29,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:31:29,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044327606] [2023-12-02 13:31:29,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:31:29,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:31:29,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:31:29,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:31:29,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:31:29,924 INFO L87 Difference]: Start difference. First operand 3757 states and 6295 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2023-12-02 13:31:30,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:31:30,466 INFO L93 Difference]: Finished difference Result 7906 states and 12324 transitions. [2023-12-02 13:31:30,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:31:30,467 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 128 [2023-12-02 13:31:30,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:31:30,496 INFO L225 Difference]: With dead ends: 7906 [2023-12-02 13:31:30,496 INFO L226 Difference]: Without dead ends: 5795 [2023-12-02 13:31:30,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:31:30,504 INFO L413 NwaCegarLoop]: 3208 mSDtfsCounter, 3415 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3415 SdHoareTripleChecker+Valid, 3350 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:31:30,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3415 Valid, 3350 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:31:30,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5795 states. [2023-12-02 13:31:30,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5795 to 5769. [2023-12-02 13:31:30,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5769 states, 5091 states have (on average 1.6073462973875468) internal successors, (8183), 5109 states have internal predecessors, (8183), 468 states have call successors, (468), 208 states have call predecessors, (468), 208 states have return successors, (468), 452 states have call predecessors, (468), 468 states have call successors, (468) [2023-12-02 13:31:30,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5769 states to 5769 states and 9119 transitions. [2023-12-02 13:31:30,728 INFO L78 Accepts]: Start accepts. Automaton has 5769 states and 9119 transitions. Word has length 128 [2023-12-02 13:31:30,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:31:30,728 INFO L495 AbstractCegarLoop]: Abstraction has 5769 states and 9119 transitions. [2023-12-02 13:31:30,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2023-12-02 13:31:30,729 INFO L276 IsEmpty]: Start isEmpty. Operand 5769 states and 9119 transitions. [2023-12-02 13:31:30,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-12-02 13:31:30,739 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:31:30,740 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:31:30,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 13:31:30,740 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:31:30,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:31:30,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1417697854, now seen corresponding path program 1 times [2023-12-02 13:31:30,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:31:30,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361305794] [2023-12-02 13:31:30,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:31:30,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:31:30,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:31:30,801 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-12-02 13:31:30,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:31:30,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361305794] [2023-12-02 13:31:30,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361305794] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:31:30,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:31:30,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:31:30,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025485611] [2023-12-02 13:31:30,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:31:30,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:31:30,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:31:30,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:31:30,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:31:30,804 INFO L87 Difference]: Start difference. First operand 5769 states and 9119 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2023-12-02 13:31:31,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:31:31,357 INFO L93 Difference]: Finished difference Result 13870 states and 20772 transitions. [2023-12-02 13:31:31,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:31:31,358 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 128 [2023-12-02 13:31:31,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:31:31,401 INFO L225 Difference]: With dead ends: 13870 [2023-12-02 13:31:31,401 INFO L226 Difference]: Without dead ends: 9747 [2023-12-02 13:31:31,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:31:31,413 INFO L413 NwaCegarLoop]: 3208 mSDtfsCounter, 3417 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3417 SdHoareTripleChecker+Valid, 3350 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:31:31,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3417 Valid, 3350 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:31:31,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9747 states. [2023-12-02 13:31:31,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9747 to 9697. [2023-12-02 13:31:31,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9697 states, 8379 states have (on average 1.5246449456975772) internal successors, (12775), 8413 states have internal predecessors, (12775), 900 states have call successors, (900), 416 states have call predecessors, (900), 416 states have return successors, (900), 868 states have call predecessors, (900), 900 states have call successors, (900) [2023-12-02 13:31:31,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9697 states to 9697 states and 14575 transitions. [2023-12-02 13:31:31,750 INFO L78 Accepts]: Start accepts. Automaton has 9697 states and 14575 transitions. Word has length 128 [2023-12-02 13:31:31,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:31:31,750 INFO L495 AbstractCegarLoop]: Abstraction has 9697 states and 14575 transitions. [2023-12-02 13:31:31,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2023-12-02 13:31:31,751 INFO L276 IsEmpty]: Start isEmpty. Operand 9697 states and 14575 transitions. [2023-12-02 13:31:31,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-12-02 13:31:31,768 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:31:31,768 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:31:31,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 13:31:31,769 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:31:31,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:31:31,769 INFO L85 PathProgramCache]: Analyzing trace with hash 18853374, now seen corresponding path program 1 times [2023-12-02 13:31:31,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:31:31,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222501889] [2023-12-02 13:31:31,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:31:31,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:31:31,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:31:31,826 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-12-02 13:31:31,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:31:31,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222501889] [2023-12-02 13:31:31,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222501889] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:31:31,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:31:31,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:31:31,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719054074] [2023-12-02 13:31:31,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:31:31,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:31:31,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:31:31,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:31:31,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:31:31,829 INFO L87 Difference]: Start difference. First operand 9697 states and 14575 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2023-12-02 13:31:32,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:31:32,630 INFO L93 Difference]: Finished difference Result 25510 states and 37076 transitions. [2023-12-02 13:31:32,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:31:32,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 128 [2023-12-02 13:31:32,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:31:32,696 INFO L225 Difference]: With dead ends: 25510 [2023-12-02 13:31:32,696 INFO L226 Difference]: Without dead ends: 17459 [2023-12-02 13:31:32,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:31:32,723 INFO L413 NwaCegarLoop]: 3226 mSDtfsCounter, 3420 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3420 SdHoareTripleChecker+Valid, 3368 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:31:32,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3420 Valid, 3368 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:31:32,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17459 states. [2023-12-02 13:31:33,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17459 to 17361. [2023-12-02 13:31:33,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17361 states, 14795 states have (on average 1.4625887124028387) internal successors, (21639), 14861 states have internal predecessors, (21639), 1732 states have call successors, (1732), 832 states have call predecessors, (1732), 832 states have return successors, (1732), 1668 states have call predecessors, (1732), 1732 states have call successors, (1732) [2023-12-02 13:31:33,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17361 states to 17361 states and 25103 transitions. [2023-12-02 13:31:33,337 INFO L78 Accepts]: Start accepts. Automaton has 17361 states and 25103 transitions. Word has length 128 [2023-12-02 13:31:33,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:31:33,338 INFO L495 AbstractCegarLoop]: Abstraction has 17361 states and 25103 transitions. [2023-12-02 13:31:33,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2023-12-02 13:31:33,339 INFO L276 IsEmpty]: Start isEmpty. Operand 17361 states and 25103 transitions. [2023-12-02 13:31:33,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-12-02 13:31:33,406 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:31:33,406 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:31:33,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 13:31:33,407 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:31:33,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:31:33,408 INFO L85 PathProgramCache]: Analyzing trace with hash -106452640, now seen corresponding path program 1 times [2023-12-02 13:31:33,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:31:33,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632277033] [2023-12-02 13:31:33,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:31:33,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:31:33,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:31:33,566 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-12-02 13:31:33,567 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:31:33,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632277033] [2023-12-02 13:31:33,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632277033] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:31:33,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282667054] [2023-12-02 13:31:33,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:31:33,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:31:33,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:31:33,568 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:31:33,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 13:31:33,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:31:33,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 805 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:31:33,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:31:33,791 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-02 13:31:33,791 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:31:33,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282667054] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:31:33,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:31:33,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 13:31:33,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420473161] [2023-12-02 13:31:33,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:31:33,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:31:33,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:31:33,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:31:33,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:31:33,793 INFO L87 Difference]: Start difference. First operand 17361 states and 25103 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) [2023-12-02 13:31:34,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:31:34,877 INFO L93 Difference]: Finished difference Result 31669 states and 45425 transitions. [2023-12-02 13:31:34,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:31:34,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 149 [2023-12-02 13:31:34,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:31:34,976 INFO L225 Difference]: With dead ends: 31669 [2023-12-02 13:31:34,976 INFO L226 Difference]: Without dead ends: 23619 [2023-12-02 13:31:35,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:31:35,009 INFO L413 NwaCegarLoop]: 3318 mSDtfsCounter, 116 mSDsluCounter, 3214 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 6532 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 13:31:35,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 6532 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 13:31:35,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23619 states. [2023-12-02 13:31:35,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23619 to 20897. [2023-12-02 13:31:35,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20897 states, 18139 states have (on average 1.4769832956612823) internal successors, (26791), 18205 states have internal predecessors, (26791), 1828 states have call successors, (1828), 928 states have call predecessors, (1828), 928 states have return successors, (1828), 1764 states have call predecessors, (1828), 1828 states have call successors, (1828) [2023-12-02 13:31:35,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20897 states to 20897 states and 30447 transitions. [2023-12-02 13:31:35,952 INFO L78 Accepts]: Start accepts. Automaton has 20897 states and 30447 transitions. Word has length 149 [2023-12-02 13:31:35,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:31:35,953 INFO L495 AbstractCegarLoop]: Abstraction has 20897 states and 30447 transitions. [2023-12-02 13:31:35,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) [2023-12-02 13:31:35,953 INFO L276 IsEmpty]: Start isEmpty. Operand 20897 states and 30447 transitions. [2023-12-02 13:31:36,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-12-02 13:31:36,015 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:31:36,016 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:31:36,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 13:31:36,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:31:36,221 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:31:36,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:31:36,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1879872490, now seen corresponding path program 2 times [2023-12-02 13:31:36,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:31:36,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70799724] [2023-12-02 13:31:36,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:31:36,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:31:36,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:31:36,541 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-12-02 13:31:36,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:31:36,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70799724] [2023-12-02 13:31:36,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70799724] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:31:36,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668813962] [2023-12-02 13:31:36,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:31:36,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:31:36,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:31:36,543 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:31:36,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 13:31:36,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 13:31:36,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:31:36,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 13:31:36,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:31:36,755 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-12-02 13:31:36,755 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:31:36,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668813962] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:31:36,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:31:36,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 13:31:36,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083008479] [2023-12-02 13:31:36,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:31:36,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:31:36,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:31:36,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:31:36,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:31:36,758 INFO L87 Difference]: Start difference. First operand 20897 states and 30447 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 13:31:37,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:31:37,912 INFO L93 Difference]: Finished difference Result 32549 states and 47633 transitions. [2023-12-02 13:31:37,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:31:37,913 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 149 [2023-12-02 13:31:37,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:31:37,964 INFO L225 Difference]: With dead ends: 32549 [2023-12-02 13:31:37,964 INFO L226 Difference]: Without dead ends: 20963 [2023-12-02 13:31:37,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:31:37,985 INFO L413 NwaCegarLoop]: 3339 mSDtfsCounter, 148 mSDsluCounter, 3200 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 6539 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 13:31:37,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 6539 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 13:31:38,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20963 states. [2023-12-02 13:31:38,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20963 to 20833. [2023-12-02 13:31:38,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20833 states, 18075 states have (on average 1.464508990318119) internal successors, (26471), 18141 states have internal predecessors, (26471), 1828 states have call successors, (1828), 928 states have call predecessors, (1828), 928 states have return successors, (1828), 1764 states have call predecessors, (1828), 1828 states have call successors, (1828) [2023-12-02 13:31:38,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20833 states to 20833 states and 30127 transitions. [2023-12-02 13:31:38,823 INFO L78 Accepts]: Start accepts. Automaton has 20833 states and 30127 transitions. Word has length 149 [2023-12-02 13:31:38,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:31:38,823 INFO L495 AbstractCegarLoop]: Abstraction has 20833 states and 30127 transitions. [2023-12-02 13:31:38,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 13:31:38,823 INFO L276 IsEmpty]: Start isEmpty. Operand 20833 states and 30127 transitions. [2023-12-02 13:31:38,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-12-02 13:31:38,863 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:31:38,864 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:31:38,869 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 13:31:39,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:31:39,065 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:31:39,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:31:39,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1000100662, now seen corresponding path program 1 times [2023-12-02 13:31:39,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:31:39,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904666107] [2023-12-02 13:31:39,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:31:39,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:31:39,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:31:39,369 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 10 proven. 43 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-12-02 13:31:39,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:31:39,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904666107] [2023-12-02 13:31:39,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904666107] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:31:39,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155157918] [2023-12-02 13:31:39,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:31:39,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:31:39,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:31:39,371 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:31:39,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 13:31:39,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:31:39,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 13:31:39,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:31:39,616 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 13:31:39,616 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:31:39,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155157918] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:31:39,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:31:39,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 13:31:39,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93420071] [2023-12-02 13:31:39,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:31:39,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:31:39,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:31:39,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:31:39,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:31:39,619 INFO L87 Difference]: Start difference. First operand 20833 states and 30127 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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) [2023-12-02 13:31:40,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:31:40,617 INFO L93 Difference]: Finished difference Result 30733 states and 44577 transitions. [2023-12-02 13:31:40,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:31:40,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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 149 [2023-12-02 13:31:40,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:31:40,696 INFO L225 Difference]: With dead ends: 30733 [2023-12-02 13:31:40,697 INFO L226 Difference]: Without dead ends: 20899 [2023-12-02 13:31:40,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:31:40,723 INFO L413 NwaCegarLoop]: 3322 mSDtfsCounter, 143 mSDsluCounter, 3199 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 6521 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:31:40,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 6521 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:31:40,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20899 states. [2023-12-02 13:31:41,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20899 to 20673. [2023-12-02 13:31:41,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20673 states, 17915 states have (on average 1.4490092101590846) internal successors, (25959), 17981 states have internal predecessors, (25959), 1828 states have call successors, (1828), 928 states have call predecessors, (1828), 928 states have return successors, (1828), 1764 states have call predecessors, (1828), 1828 states have call successors, (1828) [2023-12-02 13:31:41,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20673 states to 20673 states and 29615 transitions. [2023-12-02 13:31:41,479 INFO L78 Accepts]: Start accepts. Automaton has 20673 states and 29615 transitions. Word has length 149 [2023-12-02 13:31:41,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:31:41,480 INFO L495 AbstractCegarLoop]: Abstraction has 20673 states and 29615 transitions. [2023-12-02 13:31:41,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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) [2023-12-02 13:31:41,480 INFO L276 IsEmpty]: Start isEmpty. Operand 20673 states and 29615 transitions. [2023-12-02 13:31:41,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-12-02 13:31:41,503 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:31:41,504 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:31:41,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 13:31:41,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:31:41,704 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:31:41,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:31:41,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1671149546, now seen corresponding path program 1 times [2023-12-02 13:31:41,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:31:41,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991121962] [2023-12-02 13:31:41,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:31:41,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:31:41,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:31:41,986 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-12-02 13:31:41,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:31:41,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991121962] [2023-12-02 13:31:41,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991121962] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:31:41,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052060087] [2023-12-02 13:31:41,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:31:41,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:31:41,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:31:41,988 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:31:41,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 13:31:42,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:31:42,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 817 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:31:42,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:31:42,216 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 13:31:42,216 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:31:42,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052060087] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:31:42,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:31:42,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 13:31:42,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474698322] [2023-12-02 13:31:42,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:31:42,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:31:42,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:31:42,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:31:42,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:31:42,218 INFO L87 Difference]: Start difference. First operand 20673 states and 29615 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 13:31:43,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:31:43,005 INFO L93 Difference]: Finished difference Result 34037 states and 47690 transitions. [2023-12-02 13:31:43,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:31:43,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 149 [2023-12-02 13:31:43,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:31:43,046 INFO L225 Difference]: With dead ends: 34037 [2023-12-02 13:31:43,046 INFO L226 Difference]: Without dead ends: 24443 [2023-12-02 13:31:43,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:31:43,064 INFO L413 NwaCegarLoop]: 3227 mSDtfsCounter, 3423 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3423 SdHoareTripleChecker+Valid, 3266 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:31:43,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3423 Valid, 3266 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 13:31:43,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24443 states. [2023-12-02 13:31:43,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24443 to 24443. [2023-12-02 13:31:43,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24443 states, 21305 states have (on average 1.4076038488617695) internal successors, (29989), 21371 states have internal predecessors, (29989), 1954 states have call successors, (1954), 1182 states have call predecessors, (1954), 1182 states have return successors, (1954), 1890 states have call predecessors, (1954), 1954 states have call successors, (1954) [2023-12-02 13:31:43,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24443 states to 24443 states and 33897 transitions. [2023-12-02 13:31:43,736 INFO L78 Accepts]: Start accepts. Automaton has 24443 states and 33897 transitions. Word has length 149 [2023-12-02 13:31:43,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:31:43,736 INFO L495 AbstractCegarLoop]: Abstraction has 24443 states and 33897 transitions. [2023-12-02 13:31:43,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 13:31:43,736 INFO L276 IsEmpty]: Start isEmpty. Operand 24443 states and 33897 transitions. [2023-12-02 13:31:43,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-12-02 13:31:43,776 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:31:43,776 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:31:43,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 13:31:43,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 13:31:43,977 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:31:43,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:31:43,977 INFO L85 PathProgramCache]: Analyzing trace with hash 208616378, now seen corresponding path program 1 times [2023-12-02 13:31:43,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:31:43,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044734580] [2023-12-02 13:31:43,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:31:43,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:31:44,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:31:44,473 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-12-02 13:31:44,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:31:44,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044734580] [2023-12-02 13:31:44,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044734580] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:31:44,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741469266] [2023-12-02 13:31:44,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:31:44,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:31:44,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:31:44,475 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:31:44,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 13:31:44,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:31:44,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 908 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 13:31:44,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:31:44,905 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 70 proven. 17 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 13:31:44,905 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:31:45,291 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-12-02 13:31:45,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741469266] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:31:45,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [228469094] [2023-12-02 13:31:45,318 INFO L159 IcfgInterpreter]: Started Sifa with 78 locations of interest [2023-12-02 13:31:45,318 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:31:45,322 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:31:45,328 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:31:45,329 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:31:59,478 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 169 for LOIs [2023-12-02 13:31:59,590 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 183 for LOIs [2023-12-02 13:31:59,723 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 1 for LOIs [2023-12-02 13:31:59,724 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 1 for LOIs [2023-12-02 13:31:59,742 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 52 for LOIs [2023-12-02 13:31:59,912 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 1 for LOIs [2023-12-02 13:32:00,096 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:32:08,682 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '394032#(and (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (<= |ULTIMATE.start_eval_~tmp~0#1| 1) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (= ~m_pc~0 1) (= ~m_st~0 1) (not (= ~token~0 (+ 6 ~local~0))) (<= 0 |ULTIMATE.start_eval_~tmp~0#1|))' at error location [2023-12-02 13:32:08,682 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:32:08,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:32:08,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 9 [2023-12-02 13:32:08,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403169442] [2023-12-02 13:32:08,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:32:08,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 13:32:08,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:32:08,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 13:32:08,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=4453, Unknown=0, NotChecked=0, Total=4830 [2023-12-02 13:32:08,686 INFO L87 Difference]: Start difference. First operand 24443 states and 33897 transitions. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 5 states have call successors, (28), 6 states have call predecessors, (28), 7 states have return successors, (30), 6 states have call predecessors, (30), 5 states have call successors, (30) [2023-12-02 13:32:10,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:32:10,475 INFO L93 Difference]: Finished difference Result 59723 states and 81055 transitions. [2023-12-02 13:32:10,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 13:32:10,476 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 5 states have call successors, (28), 6 states have call predecessors, (28), 7 states have return successors, (30), 6 states have call predecessors, (30), 5 states have call successors, (30) Word has length 148 [2023-12-02 13:32:10,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:32:10,546 INFO L225 Difference]: With dead ends: 59723 [2023-12-02 13:32:10,546 INFO L226 Difference]: Without dead ends: 36927 [2023-12-02 13:32:10,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 389 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1943 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=438, Invalid=5262, Unknown=0, NotChecked=0, Total=5700 [2023-12-02 13:32:10,647 INFO L413 NwaCegarLoop]: 3219 mSDtfsCounter, 7048 mSDsluCounter, 9620 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7063 SdHoareTripleChecker+Valid, 12839 SdHoareTripleChecker+Invalid, 1248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 13:32:10,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7063 Valid, 12839 Invalid, 1248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1149 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 13:32:10,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36927 states. [2023-12-02 13:32:11,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36927 to 35485. [2023-12-02 13:32:11,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35485 states, 30815 states have (on average 1.3833198117799772) internal successors, (42627), 30913 states have internal predecessors, (42627), 2896 states have call successors, (2896), 1772 states have call predecessors, (2896), 1772 states have return successors, (2896), 2800 states have call predecessors, (2896), 2896 states have call successors, (2896) [2023-12-02 13:32:11,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35485 states to 35485 states and 48419 transitions. [2023-12-02 13:32:11,722 INFO L78 Accepts]: Start accepts. Automaton has 35485 states and 48419 transitions. Word has length 148 [2023-12-02 13:32:11,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:32:11,722 INFO L495 AbstractCegarLoop]: Abstraction has 35485 states and 48419 transitions. [2023-12-02 13:32:11,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 5 states have call successors, (28), 6 states have call predecessors, (28), 7 states have return successors, (30), 6 states have call predecessors, (30), 5 states have call successors, (30) [2023-12-02 13:32:11,723 INFO L276 IsEmpty]: Start isEmpty. Operand 35485 states and 48419 transitions. [2023-12-02 13:32:11,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-12-02 13:32:11,760 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:32:11,760 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:32:11,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 13:32:11,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 13:32:11,961 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:32:11,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:32:11,961 INFO L85 PathProgramCache]: Analyzing trace with hash -2006550441, now seen corresponding path program 1 times [2023-12-02 13:32:11,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:32:11,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166820995] [2023-12-02 13:32:11,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:32:11,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:32:11,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:32:12,135 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-12-02 13:32:12,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:32:12,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166820995] [2023-12-02 13:32:12,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166820995] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:32:12,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618457336] [2023-12-02 13:32:12,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:32:12,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:32:12,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:32:12,137 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:32:12,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 13:32:12,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:32:12,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 13:32:12,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:32:12,370 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 13:32:12,370 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:32:12,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618457336] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:32:12,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:32:12,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-12-02 13:32:12,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152771363] [2023-12-02 13:32:12,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:32:12,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:32:12,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:32:12,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:32:12,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 13:32:12,372 INFO L87 Difference]: Start difference. First operand 35485 states and 48419 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 13:32:13,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:32:13,678 INFO L93 Difference]: Finished difference Result 50230 states and 68193 transitions. [2023-12-02 13:32:13,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 13:32:13,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 150 [2023-12-02 13:32:13,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:32:13,744 INFO L225 Difference]: With dead ends: 50230 [2023-12-02 13:32:13,744 INFO L226 Difference]: Without dead ends: 37143 [2023-12-02 13:32:13,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-12-02 13:32:13,766 INFO L413 NwaCegarLoop]: 3274 mSDtfsCounter, 3410 mSDsluCounter, 3417 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3410 SdHoareTripleChecker+Valid, 6691 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:32:13,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3410 Valid, 6691 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:32:13,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37143 states. [2023-12-02 13:32:14,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37143 to 36912. [2023-12-02 13:32:14,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36912 states, 32101 states have (on average 1.3769976013208312) internal successors, (44203), 32263 states have internal predecessors, (44203), 2904 states have call successors, (2904), 1777 states have call predecessors, (2904), 1905 states have return successors, (3032), 2872 states have call predecessors, (3032), 2904 states have call successors, (3032) [2023-12-02 13:32:15,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36912 states to 36912 states and 50139 transitions. [2023-12-02 13:32:15,014 INFO L78 Accepts]: Start accepts. Automaton has 36912 states and 50139 transitions. Word has length 150 [2023-12-02 13:32:15,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:32:15,015 INFO L495 AbstractCegarLoop]: Abstraction has 36912 states and 50139 transitions. [2023-12-02 13:32:15,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 13:32:15,015 INFO L276 IsEmpty]: Start isEmpty. Operand 36912 states and 50139 transitions. [2023-12-02 13:32:15,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-12-02 13:32:15,071 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:32:15,071 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:32:15,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 13:32:15,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 13:32:15,272 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:32:15,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:32:15,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1007719754, now seen corresponding path program 1 times [2023-12-02 13:32:15,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:32:15,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948474214] [2023-12-02 13:32:15,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:32:15,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:32:15,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:32:15,523 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 10 proven. 43 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-12-02 13:32:15,524 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:32:15,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948474214] [2023-12-02 13:32:15,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948474214] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:32:15,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824434265] [2023-12-02 13:32:15,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:32:15,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:32:15,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:32:15,526 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:32:15,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 13:32:15,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:32:15,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 13:32:15,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:32:15,754 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-02 13:32:15,754 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:32:15,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824434265] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:32:15,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:32:15,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 13:32:15,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537622141] [2023-12-02 13:32:15,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:32:15,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:32:15,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:32:15,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:32:15,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:32:15,757 INFO L87 Difference]: Start difference. First operand 36912 states and 50139 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 13:32:17,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:32:17,180 INFO L93 Difference]: Finished difference Result 50527 states and 68729 transitions. [2023-12-02 13:32:17,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:32:17,181 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 151 [2023-12-02 13:32:17,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:32:17,252 INFO L225 Difference]: With dead ends: 50527 [2023-12-02 13:32:17,252 INFO L226 Difference]: Without dead ends: 35312 [2023-12-02 13:32:17,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:32:17,280 INFO L413 NwaCegarLoop]: 3225 mSDtfsCounter, 40 mSDsluCounter, 3203 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 6428 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:32:17,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 6428 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:32:17,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35312 states. [2023-12-02 13:32:18,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35312 to 33200. [2023-12-02 13:32:18,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33200 states, 28773 states have (on average 1.3939109581899698) internal successors, (40107), 28839 states have internal predecessors, (40107), 2776 states have call successors, (2776), 1649 states have call predecessors, (2776), 1649 states have return successors, (2776), 2712 states have call predecessors, (2776), 2776 states have call successors, (2776) [2023-12-02 13:32:18,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33200 states to 33200 states and 45659 transitions. [2023-12-02 13:32:18,339 INFO L78 Accepts]: Start accepts. Automaton has 33200 states and 45659 transitions. Word has length 151 [2023-12-02 13:32:18,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:32:18,340 INFO L495 AbstractCegarLoop]: Abstraction has 33200 states and 45659 transitions. [2023-12-02 13:32:18,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 13:32:18,340 INFO L276 IsEmpty]: Start isEmpty. Operand 33200 states and 45659 transitions. [2023-12-02 13:32:18,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-12-02 13:32:18,377 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:32:18,377 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:32:18,382 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 13:32:18,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 13:32:18,578 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:32:18,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:32:18,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1732411333, now seen corresponding path program 1 times [2023-12-02 13:32:18,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:32:18,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576328537] [2023-12-02 13:32:18,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:32:18,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:32:18,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:32:18,807 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 10 proven. 43 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 13:32:18,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:32:18,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576328537] [2023-12-02 13:32:18,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576328537] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:32:18,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416597579] [2023-12-02 13:32:18,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:32:18,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:32:18,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:32:18,808 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:32:18,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 13:32:18,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:32:18,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 13:32:18,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:32:19,033 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-02 13:32:19,033 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:32:19,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416597579] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:32:19,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:32:19,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 13:32:19,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777164707] [2023-12-02 13:32:19,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:32:19,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:32:19,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:32:19,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:32:19,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:32:19,035 INFO L87 Difference]: Start difference. First operand 33200 states and 45659 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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) [2023-12-02 13:32:20,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:32:20,739 INFO L93 Difference]: Finished difference Result 78474 states and 107912 transitions. [2023-12-02 13:32:20,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:32:20,739 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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 152 [2023-12-02 13:32:20,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:32:20,946 INFO L225 Difference]: With dead ends: 78474 [2023-12-02 13:32:20,946 INFO L226 Difference]: Without dead ends: 46972 [2023-12-02 13:32:20,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:32:20,974 INFO L413 NwaCegarLoop]: 3226 mSDtfsCounter, 79 mSDsluCounter, 3196 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 6422 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:32:20,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 6422 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:32:21,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46972 states. [2023-12-02 13:32:22,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46972 to 38268. [2023-12-02 13:32:22,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38268 states, 33551 states have (on average 1.4100622932252391) internal successors, (47309), 33618 states have internal predecessors, (47309), 2921 states have call successors, (2921), 1794 states have call predecessors, (2921), 1794 states have return successors, (2921), 2856 states have call predecessors, (2921), 2921 states have call successors, (2921) [2023-12-02 13:32:22,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38268 states to 38268 states and 53151 transitions. [2023-12-02 13:32:22,227 INFO L78 Accepts]: Start accepts. Automaton has 38268 states and 53151 transitions. Word has length 152 [2023-12-02 13:32:22,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:32:22,227 INFO L495 AbstractCegarLoop]: Abstraction has 38268 states and 53151 transitions. [2023-12-02 13:32:22,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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) [2023-12-02 13:32:22,228 INFO L276 IsEmpty]: Start isEmpty. Operand 38268 states and 53151 transitions. [2023-12-02 13:32:22,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-12-02 13:32:22,275 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:32:22,275 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:32:22,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 13:32:22,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 13:32:22,476 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:32:22,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:32:22,476 INFO L85 PathProgramCache]: Analyzing trace with hash -910581012, now seen corresponding path program 1 times [2023-12-02 13:32:22,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:32:22,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519697183] [2023-12-02 13:32:22,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:32:22,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:32:22,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:32:22,651 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 17 proven. 43 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-12-02 13:32:22,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:32:22,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519697183] [2023-12-02 13:32:22,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519697183] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:32:22,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003065016] [2023-12-02 13:32:22,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:32:22,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:32:22,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:32:22,653 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:32:22,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 13:32:22,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:32:22,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 13:32:22,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:32:22,880 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 13:32:22,880 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:32:22,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003065016] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:32:22,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:32:22,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2023-12-02 13:32:22,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693713141] [2023-12-02 13:32:22,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:32:22,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:32:22,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:32:22,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:32:22,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-12-02 13:32:22,882 INFO L87 Difference]: Start difference. First operand 38268 states and 53151 transitions. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 13:32:25,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:32:25,385 INFO L93 Difference]: Finished difference Result 92236 states and 126525 transitions. [2023-12-02 13:32:25,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 13:32:25,386 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 154 [2023-12-02 13:32:25,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:32:25,510 INFO L225 Difference]: With dead ends: 92236 [2023-12-02 13:32:25,510 INFO L226 Difference]: Without dead ends: 55666 [2023-12-02 13:32:25,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-12-02 13:32:25,556 INFO L413 NwaCegarLoop]: 3199 mSDtfsCounter, 3712 mSDsluCounter, 6393 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3727 SdHoareTripleChecker+Valid, 9592 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 13:32:25,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3727 Valid, 9592 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 13:32:25,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55666 states. [2023-12-02 13:32:27,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55666 to 55664. [2023-12-02 13:32:27,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55664 states, 48651 states have (on average 1.3870424040615814) internal successors, (67481), 48750 states have internal predecessors, (67481), 4325 states have call successors, (4325), 2686 states have call predecessors, (4325), 2686 states have return successors, (4325), 4228 states have call predecessors, (4325), 4325 states have call successors, (4325) [2023-12-02 13:32:27,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55664 states to 55664 states and 76131 transitions. [2023-12-02 13:32:27,674 INFO L78 Accepts]: Start accepts. Automaton has 55664 states and 76131 transitions. Word has length 154 [2023-12-02 13:32:27,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:32:27,675 INFO L495 AbstractCegarLoop]: Abstraction has 55664 states and 76131 transitions. [2023-12-02 13:32:27,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 13:32:27,675 INFO L276 IsEmpty]: Start isEmpty. Operand 55664 states and 76131 transitions. [2023-12-02 13:32:27,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-12-02 13:32:27,763 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:32:27,764 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:32:27,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 13:32:27,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 13:32:27,964 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:32:27,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:32:27,965 INFO L85 PathProgramCache]: Analyzing trace with hash 2079691607, now seen corresponding path program 1 times [2023-12-02 13:32:27,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:32:27,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566006799] [2023-12-02 13:32:27,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:32:27,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:32:27,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:32:28,057 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-12-02 13:32:28,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:32:28,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566006799] [2023-12-02 13:32:28,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566006799] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:32:28,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758769663] [2023-12-02 13:32:28,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:32:28,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:32:28,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:32:28,059 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:32:28,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 13:32:28,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:32:28,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:32:28,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:32:28,244 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-02 13:32:28,244 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:32:28,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758769663] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:32:28,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:32:28,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 13:32:28,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690096913] [2023-12-02 13:32:28,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:32:28,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:32:28,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:32:28,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:32:28,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:32:28,246 INFO L87 Difference]: Start difference. First operand 55664 states and 76131 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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) [2023-12-02 13:32:31,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:32:31,502 INFO L93 Difference]: Finished difference Result 105764 states and 145073 transitions. [2023-12-02 13:32:31,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:32:31,503 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 150 [2023-12-02 13:32:31,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:32:31,655 INFO L225 Difference]: With dead ends: 105764 [2023-12-02 13:32:31,655 INFO L226 Difference]: Without dead ends: 69614 [2023-12-02 13:32:31,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:32:31,714 INFO L413 NwaCegarLoop]: 3308 mSDtfsCounter, 102 mSDsluCounter, 3213 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 6521 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:32:31,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 6521 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:32:31,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69614 states. [2023-12-02 13:32:34,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69614 to 64928. [2023-12-02 13:32:34,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64928 states, 57339 states have (on average 1.4029020387519837) internal successors, (80441), 57438 states have internal predecessors, (80441), 4613 states have call successors, (4613), 2974 states have call predecessors, (4613), 2974 states have return successors, (4613), 4516 states have call predecessors, (4613), 4613 states have call successors, (4613) [2023-12-02 13:32:34,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64928 states to 64928 states and 89667 transitions. [2023-12-02 13:32:34,241 INFO L78 Accepts]: Start accepts. Automaton has 64928 states and 89667 transitions. Word has length 150 [2023-12-02 13:32:34,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:32:34,241 INFO L495 AbstractCegarLoop]: Abstraction has 64928 states and 89667 transitions. [2023-12-02 13:32:34,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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) [2023-12-02 13:32:34,241 INFO L276 IsEmpty]: Start isEmpty. Operand 64928 states and 89667 transitions. [2023-12-02 13:32:34,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-12-02 13:32:34,332 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:32:34,332 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:32:34,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 13:32:34,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 13:32:34,533 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:32:34,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:32:34,533 INFO L85 PathProgramCache]: Analyzing trace with hash -727250295, now seen corresponding path program 1 times [2023-12-02 13:32:34,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:32:34,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362541269] [2023-12-02 13:32:34,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:32:34,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:32:34,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:32:34,710 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 17 proven. 45 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-12-02 13:32:34,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:32:34,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362541269] [2023-12-02 13:32:34,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362541269] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:32:34,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67688242] [2023-12-02 13:32:34,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:32:34,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:32:34,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:32:34,712 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:32:34,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 13:32:34,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:32:34,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 13:32:34,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:32:34,906 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 13:32:34,906 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:32:34,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67688242] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:32:34,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:32:34,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 13:32:34,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090838512] [2023-12-02 13:32:34,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:32:34,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:32:34,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:32:34,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:32:34,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:32:34,907 INFO L87 Difference]: Start difference. First operand 64928 states and 89667 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 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) [2023-12-02 13:32:37,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:32:37,860 INFO L93 Difference]: Finished difference Result 110440 states and 153813 transitions. [2023-12-02 13:32:37,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:32:37,860 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 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 154 [2023-12-02 13:32:37,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:32:37,978 INFO L225 Difference]: With dead ends: 110440 [2023-12-02 13:32:37,978 INFO L226 Difference]: Without dead ends: 65026 [2023-12-02 13:32:38,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:32:38,020 INFO L413 NwaCegarLoop]: 3324 mSDtfsCounter, 140 mSDsluCounter, 3197 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 6521 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:32:38,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 6521 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:32:38,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65026 states. [2023-12-02 13:32:40,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65026 to 64544. [2023-12-02 13:32:40,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64544 states, 56955 states have (on average 1.3898867526994996) internal successors, (79161), 57054 states have internal predecessors, (79161), 4613 states have call successors, (4613), 2974 states have call predecessors, (4613), 2974 states have return successors, (4613), 4516 states have call predecessors, (4613), 4613 states have call successors, (4613) [2023-12-02 13:32:40,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64544 states to 64544 states and 88387 transitions. [2023-12-02 13:32:40,747 INFO L78 Accepts]: Start accepts. Automaton has 64544 states and 88387 transitions. Word has length 154 [2023-12-02 13:32:40,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:32:40,747 INFO L495 AbstractCegarLoop]: Abstraction has 64544 states and 88387 transitions. [2023-12-02 13:32:40,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 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) [2023-12-02 13:32:40,747 INFO L276 IsEmpty]: Start isEmpty. Operand 64544 states and 88387 transitions. [2023-12-02 13:32:40,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-12-02 13:32:40,830 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:32:40,831 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:32:40,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 13:32:41,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:32:41,031 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:32:41,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:32:41,032 INFO L85 PathProgramCache]: Analyzing trace with hash -2095221689, now seen corresponding path program 1 times [2023-12-02 13:32:41,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:32:41,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453087838] [2023-12-02 13:32:41,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:32:41,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:32:41,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:32:41,202 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 17 proven. 43 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-12-02 13:32:41,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:32:41,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453087838] [2023-12-02 13:32:41,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453087838] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:32:41,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235749206] [2023-12-02 13:32:41,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:32:41,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:32:41,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:32:41,204 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:32:41,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 13:32:41,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:32:41,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 13:32:41,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:32:41,455 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-02 13:32:41,455 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:32:41,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235749206] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:32:41,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:32:41,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2023-12-02 13:32:41,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258562917] [2023-12-02 13:32:41,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:32:41,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:32:41,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:32:41,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:32:41,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-12-02 13:32:41,457 INFO L87 Difference]: Start difference. First operand 64544 states and 88387 transitions. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 13:32:46,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:32:46,341 INFO L93 Difference]: Finished difference Result 156760 states and 212641 transitions. [2023-12-02 13:32:46,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 13:32:46,341 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 154 [2023-12-02 13:32:46,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:32:46,640 INFO L225 Difference]: With dead ends: 156760 [2023-12-02 13:32:46,640 INFO L226 Difference]: Without dead ends: 93914 [2023-12-02 13:32:46,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-12-02 13:32:46,686 INFO L413 NwaCegarLoop]: 3196 mSDtfsCounter, 3725 mSDsluCounter, 6375 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3740 SdHoareTripleChecker+Valid, 9571 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 13:32:46,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3740 Valid, 9571 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 13:32:46,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93914 states. [2023-12-02 13:32:50,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93914 to 93912. [2023-12-02 13:32:50,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93912 states, 82619 states have (on average 1.3648313341967344) internal successors, (112761), 82766 states have internal predecessors, (112761), 6837 states have call successors, (6837), 4454 states have call predecessors, (6837), 4454 states have return successors, (6837), 6692 states have call predecessors, (6837), 6837 states have call successors, (6837) [2023-12-02 13:32:50,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93912 states to 93912 states and 126435 transitions. [2023-12-02 13:32:51,000 INFO L78 Accepts]: Start accepts. Automaton has 93912 states and 126435 transitions. Word has length 154 [2023-12-02 13:32:51,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:32:51,000 INFO L495 AbstractCegarLoop]: Abstraction has 93912 states and 126435 transitions. [2023-12-02 13:32:51,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 13:32:51,001 INFO L276 IsEmpty]: Start isEmpty. Operand 93912 states and 126435 transitions. [2023-12-02 13:32:51,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-12-02 13:32:51,159 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:32:51,159 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:32:51,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 13:32:51,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:32:51,360 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:32:51,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:32:51,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1394238128, now seen corresponding path program 1 times [2023-12-02 13:32:51,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:32:51,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982752410] [2023-12-02 13:32:51,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:32:51,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:32:51,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:32:51,497 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-12-02 13:32:51,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:32:51,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982752410] [2023-12-02 13:32:51,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982752410] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:32:51,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451544428] [2023-12-02 13:32:51,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:32:51,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:32:51,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:32:51,499 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:32:51,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 13:32:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:32:51,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 822 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:32:51,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:32:51,696 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-02 13:32:51,696 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:32:51,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451544428] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:32:51,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:32:51,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 13:32:51,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157223885] [2023-12-02 13:32:51,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:32:51,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:32:51,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:32:51,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:32:51,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:32:51,698 INFO L87 Difference]: Start difference. First operand 93912 states and 126435 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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) [2023-12-02 13:32:57,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:32:57,057 INFO L93 Difference]: Finished difference Result 180188 states and 243277 transitions. [2023-12-02 13:32:57,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:32:57,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 154 [2023-12-02 13:32:57,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:32:57,329 INFO L225 Difference]: With dead ends: 180188 [2023-12-02 13:32:57,329 INFO L226 Difference]: Without dead ends: 118834 [2023-12-02 13:32:57,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:32:57,408 INFO L413 NwaCegarLoop]: 3312 mSDtfsCounter, 105 mSDsluCounter, 3212 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 6524 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:32:57,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 6524 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:32:57,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118834 states. [2023-12-02 13:33:03,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118834 to 110856. [2023-12-02 13:33:03,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110856 states, 98411 states have (on average 1.3770107000233713) internal successors, (135513), 98558 states have internal predecessors, (135513), 7413 states have call successors, (7413), 5030 states have call predecessors, (7413), 5030 states have return successors, (7413), 7268 states have call predecessors, (7413), 7413 states have call successors, (7413) [2023-12-02 13:33:03,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110856 states to 110856 states and 150339 transitions. [2023-12-02 13:33:03,535 INFO L78 Accepts]: Start accepts. Automaton has 110856 states and 150339 transitions. Word has length 154 [2023-12-02 13:33:03,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:33:03,535 INFO L495 AbstractCegarLoop]: Abstraction has 110856 states and 150339 transitions. [2023-12-02 13:33:03,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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) [2023-12-02 13:33:03,536 INFO L276 IsEmpty]: Start isEmpty. Operand 110856 states and 150339 transitions. [2023-12-02 13:33:03,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-12-02 13:33:03,704 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:33:03,704 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:33:03,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-02 13:33:03,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:33:03,905 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:33:03,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:33:03,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1779802157, now seen corresponding path program 1 times [2023-12-02 13:33:03,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:33:03,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56009463] [2023-12-02 13:33:03,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:33:03,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:33:03,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:33:04,171 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 17 proven. 43 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-12-02 13:33:04,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:33:04,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56009463] [2023-12-02 13:33:04,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56009463] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:33:04,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383090156] [2023-12-02 13:33:04,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:33:04,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:33:04,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:33:04,173 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:33:04,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-02 13:33:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:33:04,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 13:33:04,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:33:04,413 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-12-02 13:33:04,413 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:33:04,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383090156] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:33:04,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:33:04,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2023-12-02 13:33:04,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724063105] [2023-12-02 13:33:04,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:33:04,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:33:04,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:33:04,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:33:04,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:33:04,416 INFO L87 Difference]: Start difference. First operand 110856 states and 150339 transitions. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 13:33:12,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:33:12,508 INFO L93 Difference]: Finished difference Result 270500 states and 364125 transitions. [2023-12-02 13:33:12,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 13:33:12,509 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 158 [2023-12-02 13:33:12,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:33:12,839 INFO L225 Difference]: With dead ends: 270500 [2023-12-02 13:33:12,839 INFO L226 Difference]: Without dead ends: 161342 [2023-12-02 13:33:12,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-12-02 13:33:12,934 INFO L413 NwaCegarLoop]: 3198 mSDtfsCounter, 7091 mSDsluCounter, 6320 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7106 SdHoareTripleChecker+Valid, 9518 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 13:33:12,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7106 Valid, 9518 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 13:33:13,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161342 states. [2023-12-02 13:33:21,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161342 to 161340. [2023-12-02 13:33:21,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161340 states, 142807 states have (on average 1.3502209275455685) internal successors, (192821), 143026 states have internal predecessors, (192821), 10997 states have call successors, (10997), 7534 states have call predecessors, (10997), 7534 states have return successors, (10997), 10780 states have call predecessors, (10997), 10997 states have call successors, (10997) [2023-12-02 13:33:22,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161340 states to 161340 states and 214815 transitions. [2023-12-02 13:33:22,137 INFO L78 Accepts]: Start accepts. Automaton has 161340 states and 214815 transitions. Word has length 158 [2023-12-02 13:33:22,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:33:22,138 INFO L495 AbstractCegarLoop]: Abstraction has 161340 states and 214815 transitions. [2023-12-02 13:33:22,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 13:33:22,138 INFO L276 IsEmpty]: Start isEmpty. Operand 161340 states and 214815 transitions. [2023-12-02 13:33:22,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-12-02 13:33:22,402 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:33:22,403 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:33:22,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-02 13:33:22,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:33:22,603 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:33:22,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:33:22,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1783485667, now seen corresponding path program 1 times [2023-12-02 13:33:22,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:33:22,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926499706] [2023-12-02 13:33:22,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:33:22,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:33:22,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:33:22,829 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 20 proven. 43 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-12-02 13:33:22,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:33:22,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926499706] [2023-12-02 13:33:22,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926499706] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:33:22,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831107895] [2023-12-02 13:33:22,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:33:22,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:33:22,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:33:22,831 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:33:22,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-02 13:33:23,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:33:23,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 13:33:23,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:33:23,099 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-02 13:33:23,099 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:33:23,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831107895] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:33:23,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:33:23,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2023-12-02 13:33:23,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272239588] [2023-12-02 13:33:23,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:33:23,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:33:23,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:33:23,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:33:23,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-12-02 13:33:23,101 INFO L87 Difference]: Start difference. First operand 161340 states and 214815 transitions. Second operand has 6 states, 5 states have (on average 22.8) internal successors, (114), 6 states have internal predecessors, (114), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 13:33:35,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:33:35,301 INFO L93 Difference]: Finished difference Result 379976 states and 503973 transitions. [2023-12-02 13:33:35,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 13:33:35,302 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 22.8) internal successors, (114), 6 states have internal predecessors, (114), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 162 [2023-12-02 13:33:35,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:33:35,887 INFO L225 Difference]: With dead ends: 379976 [2023-12-02 13:33:35,887 INFO L226 Difference]: Without dead ends: 220334 [2023-12-02 13:33:36,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-12-02 13:33:36,068 INFO L413 NwaCegarLoop]: 3198 mSDtfsCounter, 7071 mSDsluCounter, 6300 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7086 SdHoareTripleChecker+Valid, 9498 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 13:33:36,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7086 Valid, 9498 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 13:33:36,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220334 states. [2023-12-02 13:33:48,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220334 to 220332. [2023-12-02 13:33:48,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220332 states, 193889 states have (on average 1.3343562553832347) internal successors, (258717), 194216 states have internal predecessors, (258717), 15735 states have call successors, (15735), 10706 states have call predecessors, (15735), 10706 states have return successors, (15735), 15410 states have call predecessors, (15735), 15735 states have call successors, (15735) [2023-12-02 13:33:49,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220332 states to 220332 states and 290187 transitions. [2023-12-02 13:33:49,568 INFO L78 Accepts]: Start accepts. Automaton has 220332 states and 290187 transitions. Word has length 162 [2023-12-02 13:33:49,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:33:49,569 INFO L495 AbstractCegarLoop]: Abstraction has 220332 states and 290187 transitions. [2023-12-02 13:33:49,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 22.8) internal successors, (114), 6 states have internal predecessors, (114), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 13:33:49,569 INFO L276 IsEmpty]: Start isEmpty. Operand 220332 states and 290187 transitions. [2023-12-02 13:33:49,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-12-02 13:33:49,853 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:33:49,853 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:33:49,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-02 13:33:50,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:33:50,054 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:33:50,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:33:50,054 INFO L85 PathProgramCache]: Analyzing trace with hash -2125670302, now seen corresponding path program 1 times [2023-12-02 13:33:50,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:33:50,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786930485] [2023-12-02 13:33:50,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:33:50,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:33:50,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:33:50,514 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 20 proven. 43 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-12-02 13:33:50,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:33:50,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786930485] [2023-12-02 13:33:50,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786930485] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:33:50,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055167597] [2023-12-02 13:33:50,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:33:50,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:33:50,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:33:50,515 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:33:50,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-02 13:33:50,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:33:50,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 13:33:50,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:33:50,753 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 13:33:50,754 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:33:50,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055167597] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:33:50,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:33:50,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2023-12-02 13:33:50,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188832976] [2023-12-02 13:33:50,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:33:50,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:33:50,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:33:50,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:33:50,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:33:50,755 INFO L87 Difference]: Start difference. First operand 220332 states and 290187 transitions. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 13:34:09,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:34:09,495 INFO L93 Difference]: Finished difference Result 540041 states and 707031 transitions. [2023-12-02 13:34:09,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 13:34:09,496 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 166 [2023-12-02 13:34:09,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:34:10,149 INFO L225 Difference]: With dead ends: 540041 [2023-12-02 13:34:10,149 INFO L226 Difference]: Without dead ends: 321407 [2023-12-02 13:34:10,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-12-02 13:34:10,328 INFO L413 NwaCegarLoop]: 3197 mSDtfsCounter, 3712 mSDsluCounter, 6394 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3727 SdHoareTripleChecker+Valid, 9591 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 13:34:10,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3727 Valid, 9591 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 13:34:10,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321407 states. [2023-12-02 13:34:27,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321407 to 321405. [2023-12-02 13:34:27,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321405 states, 282058 states have (on average 1.3079827553198278) internal successors, (368927), 282547 states have internal predecessors, (368927), 23321 states have call successors, (23321), 16024 states have call predecessors, (23321), 16024 states have return successors, (23321), 22834 states have call predecessors, (23321), 23321 states have call successors, (23321) [2023-12-02 13:34:28,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321405 states to 321405 states and 415569 transitions. [2023-12-02 13:34:28,198 INFO L78 Accepts]: Start accepts. Automaton has 321405 states and 415569 transitions. Word has length 166 [2023-12-02 13:34:28,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:34:28,198 INFO L495 AbstractCegarLoop]: Abstraction has 321405 states and 415569 transitions. [2023-12-02 13:34:28,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 13:34:28,198 INFO L276 IsEmpty]: Start isEmpty. Operand 321405 states and 415569 transitions. [2023-12-02 13:34:28,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-12-02 13:34:28,994 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:34:28,995 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:34:29,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-02 13:34:29,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-12-02 13:34:29,196 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:34:29,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:34:29,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1257487124, now seen corresponding path program 1 times [2023-12-02 13:34:29,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:34:29,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970736241] [2023-12-02 13:34:29,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:34:29,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:34:29,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:34:29,375 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 50 proven. 23 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 13:34:29,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:34:29,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970736241] [2023-12-02 13:34:29,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970736241] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:34:29,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322546112] [2023-12-02 13:34:29,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:34:29,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:34:29,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:34:29,377 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:34:29,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-02 13:34:29,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:34:29,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 13:34:29,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:34:29,647 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 13:34:29,648 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:34:29,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322546112] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:34:29,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:34:29,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2023-12-02 13:34:29,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907551726] [2023-12-02 13:34:29,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:34:29,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:34:29,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:34:29,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:34:29,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:34:29,650 INFO L87 Difference]: Start difference. First operand 321405 states and 415569 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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) [2023-12-02 13:34:48,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:34:48,341 INFO L93 Difference]: Finished difference Result 590597 states and 767008 transitions. [2023-12-02 13:34:48,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:34:48,342 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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 170 [2023-12-02 13:34:48,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:34:49,380 INFO L225 Difference]: With dead ends: 590597 [2023-12-02 13:34:49,380 INFO L226 Difference]: Without dead ends: 364149 [2023-12-02 13:34:49,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:34:49,687 INFO L413 NwaCegarLoop]: 3226 mSDtfsCounter, 3380 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3380 SdHoareTripleChecker+Valid, 3272 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:34:49,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3380 Valid, 3272 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 13:34:49,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364149 states. [2023-12-02 13:35:08,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364149 to 361817. [2023-12-02 13:35:08,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361817 states, 320167 states have (on average 1.2928284301630086) internal successors, (413921), 320656 states have internal predecessors, (413921), 23743 states have call successors, (23743), 17905 states have call predecessors, (23743), 17905 states have return successors, (25331), 23256 states have call predecessors, (25331), 23743 states have call successors, (25331) [2023-12-02 13:35:09,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361817 states to 361817 states and 462995 transitions. [2023-12-02 13:35:09,826 INFO L78 Accepts]: Start accepts. Automaton has 361817 states and 462995 transitions. Word has length 170 [2023-12-02 13:35:09,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:35:09,827 INFO L495 AbstractCegarLoop]: Abstraction has 361817 states and 462995 transitions. [2023-12-02 13:35:09,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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) [2023-12-02 13:35:09,827 INFO L276 IsEmpty]: Start isEmpty. Operand 361817 states and 462995 transitions. [2023-12-02 13:35:10,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-12-02 13:35:10,238 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:35:10,238 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:35:10,244 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-12-02 13:35:10,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-12-02 13:35:10,439 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:35:10,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:35:10,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1599765280, now seen corresponding path program 1 times [2023-12-02 13:35:10,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:35:10,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177705430] [2023-12-02 13:35:10,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:35:10,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:35:10,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:35:11,182 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 63 proven. 26 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 13:35:11,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:35:11,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177705430] [2023-12-02 13:35:11,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177705430] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:35:11,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791058692] [2023-12-02 13:35:11,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:35:11,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:35:11,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:35:11,184 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:35:11,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a54a1a-b877-47a4-972b-ced623cb44fd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-02 13:35:11,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:35:11,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 13:35:11,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:35:11,478 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:35:11,478 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:35:11,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791058692] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:35:11,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:35:11,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2023-12-02 13:35:11,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087062301] [2023-12-02 13:35:11,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:35:11,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:35:11,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:35:11,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:35:11,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:35:11,480 INFO L87 Difference]: Start difference. First operand 361817 states and 462995 transitions. Second operand has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-12-02 13:35:35,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:35:35,953 INFO L93 Difference]: Finished difference Result 714371 states and 917003 transitions. [2023-12-02 13:35:35,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 13:35:35,954 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 172 [2023-12-02 13:35:35,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:35:37,091 INFO L225 Difference]: With dead ends: 714371 [2023-12-02 13:35:37,091 INFO L226 Difference]: Without dead ends: 460965 [2023-12-02 13:35:37,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-12-02 13:35:37,338 INFO L413 NwaCegarLoop]: 3319 mSDtfsCounter, 295 mSDsluCounter, 9498 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 12817 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 13:35:37,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 12817 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1118 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 13:35:37,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460965 states.