./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/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_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/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_81c2820c-1d8e-454e-8783-ceacfb3919a8/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 71189e3cc465fa9296e61b90c4b4428a637cf1ec8723797967b75b70226f0c15 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 19:41:52,375 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 19:41:52,439 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 19:41:52,444 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 19:41:52,444 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 19:41:52,466 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 19:41:52,466 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 19:41:52,467 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 19:41:52,467 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 19:41:52,468 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 19:41:52,468 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 19:41:52,469 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 19:41:52,469 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 19:41:52,470 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 19:41:52,470 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 19:41:52,471 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 19:41:52,471 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 19:41:52,472 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 19:41:52,473 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 19:41:52,473 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 19:41:52,474 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 19:41:52,476 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 19:41:52,477 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 19:41:52,478 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 19:41:52,478 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 19:41:52,479 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 19:41:52,479 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 19:41:52,479 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 19:41:52,480 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 19:41:52,480 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 19:41:52,480 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 19:41:52,481 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 19:41:52,481 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 19:41:52,481 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 19:41:52,482 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 19:41:52,482 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 19:41:52,482 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 19:41:52,482 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:41:52,482 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 19:41:52,483 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 19:41:52,483 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 19:41:52,483 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 19:41:52,483 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 19:41:52,483 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 19:41:52,484 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 19:41:52,484 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 19:41:52,484 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 19:41:52,484 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_81c2820c-1d8e-454e-8783-ceacfb3919a8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71189e3cc465fa9296e61b90c4b4428a637cf1ec8723797967b75b70226f0c15 [2023-12-02 19:41:52,685 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 19:41:52,706 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 19:41:52,708 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 19:41:52,710 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 19:41:52,710 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 19:41:52,711 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-1.c [2023-12-02 19:41:55,435 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 19:41:55,633 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 19:41:55,634 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-1.c [2023-12-02 19:41:55,647 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/data/ff3a362e0/16e930c51b454de1a59498a5b8fa71e6/FLAGe16035aa9 [2023-12-02 19:41:55,659 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/data/ff3a362e0/16e930c51b454de1a59498a5b8fa71e6 [2023-12-02 19:41:55,660 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 19:41:55,661 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 19:41:55,662 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 19:41:55,662 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 19:41:55,667 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 19:41:55,668 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:41:55" (1/1) ... [2023-12-02 19:41:55,669 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4655fccf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:55, skipping insertion in model container [2023-12-02 19:41:55,669 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:41:55" (1/1) ... [2023-12-02 19:41:55,726 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 19:41:55,852 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_81c2820c-1d8e-454e-8783-ceacfb3919a8/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-1.c[913,926] [2023-12-02 19:41:55,898 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_81c2820c-1d8e-454e-8783-ceacfb3919a8/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-1.c[5977,5990] [2023-12-02 19:41:55,976 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:41:55,988 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 19:41:56,000 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_81c2820c-1d8e-454e-8783-ceacfb3919a8/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-1.c[913,926] [2023-12-02 19:41:56,015 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_81c2820c-1d8e-454e-8783-ceacfb3919a8/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-1.c[5977,5990] [2023-12-02 19:41:56,061 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:41:56,084 INFO L206 MainTranslator]: Completed translation [2023-12-02 19:41:56,084 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:56 WrapperNode [2023-12-02 19:41:56,085 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 19:41:56,086 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 19:41:56,086 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 19:41:56,086 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 19:41:56,092 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:56" (1/1) ... [2023-12-02 19:41:56,103 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:56" (1/1) ... [2023-12-02 19:41:56,140 INFO L138 Inliner]: procedures = 64, calls = 72, calls flagged for inlining = 39, calls inlined = 39, statements flattened = 845 [2023-12-02 19:41:56,140 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 19:41:56,141 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 19:41:56,141 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 19:41:56,141 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 19:41:56,149 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:56" (1/1) ... [2023-12-02 19:41:56,149 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:56" (1/1) ... [2023-12-02 19:41:56,154 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:56" (1/1) ... [2023-12-02 19:41:56,155 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:56" (1/1) ... [2023-12-02 19:41:56,168 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:56" (1/1) ... [2023-12-02 19:41:56,193 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:56" (1/1) ... [2023-12-02 19:41:56,196 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:56" (1/1) ... [2023-12-02 19:41:56,200 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:56" (1/1) ... [2023-12-02 19:41:56,206 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 19:41:56,207 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 19:41:56,207 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 19:41:56,207 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 19:41:56,208 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:56" (1/1) ... [2023-12-02 19:41:56,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:41:56,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:41:56,249 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 19:41:56,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 19:41:56,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 19:41:56,289 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-12-02 19:41:56,289 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-12-02 19:41:56,289 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2023-12-02 19:41:56,289 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2023-12-02 19:41:56,290 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-12-02 19:41:56,290 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-12-02 19:41:56,290 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-12-02 19:41:56,290 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-12-02 19:41:56,290 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-12-02 19:41:56,291 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-12-02 19:41:56,291 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-12-02 19:41:56,291 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-12-02 19:41:56,291 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-12-02 19:41:56,291 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-12-02 19:41:56,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 19:41:56,292 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-12-02 19:41:56,292 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-12-02 19:41:56,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 19:41:56,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 19:41:56,292 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-12-02 19:41:56,292 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-12-02 19:41:56,417 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 19:41:56,419 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 19:41:57,081 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 19:41:57,481 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 19:41:57,481 INFO L309 CfgBuilder]: Removed 15 assume(true) statements. [2023-12-02 19:41:57,483 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:41:57 BoogieIcfgContainer [2023-12-02 19:41:57,483 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 19:41:57,485 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 19:41:57,485 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 19:41:57,488 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 19:41:57,489 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 07:41:55" (1/3) ... [2023-12-02 19:41:57,489 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18c8c45e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:41:57, skipping insertion in model container [2023-12-02 19:41:57,490 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:41:56" (2/3) ... [2023-12-02 19:41:57,490 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18c8c45e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:41:57, skipping insertion in model container [2023-12-02 19:41:57,490 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:41:57" (3/3) ... [2023-12-02 19:41:57,491 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.08.cil-1.c [2023-12-02 19:41:57,511 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 19:41:57,511 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-02 19:41:57,566 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 19:41:57,573 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;@1fa3b979, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 19:41:57,574 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-02 19:41:57,579 INFO L276 IsEmpty]: Start isEmpty. Operand has 204 states, 164 states have (on average 1.524390243902439) internal successors, (250), 169 states have internal predecessors, (250), 28 states have call successors, (28), 9 states have call predecessors, (28), 9 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2023-12-02 19:41:57,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 19:41:57,589 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:41:57,590 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] [2023-12-02 19:41:57,590 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:41:57,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:41:57,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1839927607, now seen corresponding path program 1 times [2023-12-02 19:41:57,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:41:57,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336939927] [2023-12-02 19:41:57,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:57,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:41:57,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:57,888 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 19:41:57,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:41:57,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336939927] [2023-12-02 19:41:57,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336939927] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:41:57,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:41:57,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:41:57,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555080007] [2023-12-02 19:41:57,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:41:57,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:41:57,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:41:57,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:41:57,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:41:57,929 INFO L87 Difference]: Start difference. First operand has 204 states, 164 states have (on average 1.524390243902439) internal successors, (250), 169 states have internal predecessors, (250), 28 states have call successors, (28), 9 states have call predecessors, (28), 9 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 19:41:58,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:41:58,104 INFO L93 Difference]: Finished difference Result 441 states and 660 transitions. [2023-12-02 19:41:58,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:41:58,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2023-12-02 19:41:58,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:41:58,117 INFO L225 Difference]: With dead ends: 441 [2023-12-02 19:41:58,117 INFO L226 Difference]: Without dead ends: 237 [2023-12-02 19:41:58,121 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 19:41:58,125 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 273 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:41:58,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 314 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:41:58,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2023-12-02 19:41:58,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 233. [2023-12-02 19:41:58,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 190 states have (on average 1.4578947368421054) internal successors, (277), 193 states have internal predecessors, (277), 31 states have call successors, (31), 11 states have call predecessors, (31), 10 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2023-12-02 19:41:58,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 337 transitions. [2023-12-02 19:41:58,185 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 337 transitions. Word has length 28 [2023-12-02 19:41:58,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:41:58,185 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 337 transitions. [2023-12-02 19:41:58,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 19:41:58,186 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 337 transitions. [2023-12-02 19:41:58,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 19:41:58,189 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:41:58,189 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] [2023-12-02 19:41:58,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 19:41:58,189 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:41:58,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:41:58,190 INFO L85 PathProgramCache]: Analyzing trace with hash -986806674, now seen corresponding path program 1 times [2023-12-02 19:41:58,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:41:58,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750319980] [2023-12-02 19:41:58,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:58,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:41:58,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:58,251 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 19:41:58,251 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:41:58,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750319980] [2023-12-02 19:41:58,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750319980] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:41:58,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:41:58,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:41:58,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351628777] [2023-12-02 19:41:58,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:41:58,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:41:58,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:41:58,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:41:58,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:41:58,255 INFO L87 Difference]: Start difference. First operand 233 states and 337 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 19:41:58,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:41:58,361 INFO L93 Difference]: Finished difference Result 389 states and 554 transitions. [2023-12-02 19:41:58,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:41:58,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2023-12-02 19:41:58,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:41:58,365 INFO L225 Difference]: With dead ends: 389 [2023-12-02 19:41:58,365 INFO L226 Difference]: Without dead ends: 308 [2023-12-02 19:41:58,366 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 19:41:58,367 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 271 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:41:58,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 298 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:41:58,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2023-12-02 19:41:58,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 304. [2023-12-02 19:41:58,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 250 states have (on average 1.432) internal successors, (358), 253 states have internal predecessors, (358), 38 states have call successors, (38), 15 states have call predecessors, (38), 14 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2023-12-02 19:41:58,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 432 transitions. [2023-12-02 19:41:58,397 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 432 transitions. Word has length 29 [2023-12-02 19:41:58,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:41:58,397 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 432 transitions. [2023-12-02 19:41:58,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 19:41:58,397 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 432 transitions. [2023-12-02 19:41:58,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 19:41:58,399 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:41:58,400 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] [2023-12-02 19:41:58,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 19:41:58,400 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:41:58,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:41:58,401 INFO L85 PathProgramCache]: Analyzing trace with hash 2074880379, now seen corresponding path program 1 times [2023-12-02 19:41:58,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:41:58,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512239676] [2023-12-02 19:41:58,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:58,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:41:58,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:58,471 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 19:41:58,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:41:58,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512239676] [2023-12-02 19:41:58,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512239676] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:41:58,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:41:58,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:41:58,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399806589] [2023-12-02 19:41:58,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:41:58,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:41:58,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:41:58,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:41:58,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:41:58,474 INFO L87 Difference]: Start difference. First operand 304 states and 432 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 19:41:58,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:41:58,605 INFO L93 Difference]: Finished difference Result 544 states and 760 transitions. [2023-12-02 19:41:58,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:41:58,605 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2023-12-02 19:41:58,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:41:58,609 INFO L225 Difference]: With dead ends: 544 [2023-12-02 19:41:58,609 INFO L226 Difference]: Without dead ends: 392 [2023-12-02 19:41:58,610 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 19:41:58,611 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 46 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:41:58,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 487 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:41:58,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2023-12-02 19:41:58,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 378. [2023-12-02 19:41:58,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 313 states have (on average 1.415335463258786) internal successors, (443), 318 states have internal predecessors, (443), 44 states have call successors, (44), 20 states have call predecessors, (44), 19 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2023-12-02 19:41:58,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 529 transitions. [2023-12-02 19:41:58,642 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 529 transitions. Word has length 30 [2023-12-02 19:41:58,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:41:58,642 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 529 transitions. [2023-12-02 19:41:58,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 19:41:58,642 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 529 transitions. [2023-12-02 19:41:58,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-02 19:41:58,645 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:41:58,645 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:41:58,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 19:41:58,645 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:41:58,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:41:58,646 INFO L85 PathProgramCache]: Analyzing trace with hash 684971106, now seen corresponding path program 1 times [2023-12-02 19:41:58,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:41:58,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451916733] [2023-12-02 19:41:58,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:58,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:41:58,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:58,726 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 19:41:58,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:41:58,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451916733] [2023-12-02 19:41:58,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451916733] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:41:58,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:41:58,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:41:58,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804815316] [2023-12-02 19:41:58,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:41:58,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:41:58,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:41:58,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:41:58,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:41:58,729 INFO L87 Difference]: Start difference. First operand 378 states and 529 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 19:41:58,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:41:58,851 INFO L93 Difference]: Finished difference Result 541 states and 747 transitions. [2023-12-02 19:41:58,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:41:58,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2023-12-02 19:41:58,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:41:58,856 INFO L225 Difference]: With dead ends: 541 [2023-12-02 19:41:58,856 INFO L226 Difference]: Without dead ends: 383 [2023-12-02 19:41:58,857 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 19:41:58,859 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 32 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:41:58,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 521 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:41:58,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2023-12-02 19:41:58,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 372. [2023-12-02 19:41:58,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 307 states have (on average 1.3973941368078175) internal successors, (429), 312 states have internal predecessors, (429), 44 states have call successors, (44), 20 states have call predecessors, (44), 19 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2023-12-02 19:41:58,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 515 transitions. [2023-12-02 19:41:58,885 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 515 transitions. Word has length 43 [2023-12-02 19:41:58,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:41:58,885 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 515 transitions. [2023-12-02 19:41:58,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 19:41:58,886 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 515 transitions. [2023-12-02 19:41:58,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-02 19:41:58,887 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:41:58,888 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:41:58,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 19:41:58,888 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:41:58,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:41:58,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1125024550, now seen corresponding path program 1 times [2023-12-02 19:41:58,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:41:58,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279367514] [2023-12-02 19:41:58,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:58,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:41:58,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:58,935 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 19:41:58,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:41:58,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279367514] [2023-12-02 19:41:58,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279367514] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:41:58,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:41:58,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:41:58,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977188648] [2023-12-02 19:41:58,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:41:58,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:41:58,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:41:58,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:41:58,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:41:58,938 INFO L87 Difference]: Start difference. First operand 372 states and 515 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 19:41:59,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:41:59,046 INFO L93 Difference]: Finished difference Result 621 states and 839 transitions. [2023-12-02 19:41:59,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:41:59,047 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2023-12-02 19:41:59,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:41:59,050 INFO L225 Difference]: With dead ends: 621 [2023-12-02 19:41:59,050 INFO L226 Difference]: Without dead ends: 418 [2023-12-02 19:41:59,051 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 19:41:59,053 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 257 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:41:59,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 297 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:41:59,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2023-12-02 19:41:59,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 418. [2023-12-02 19:41:59,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 346 states have (on average 1.3641618497109826) internal successors, (472), 351 states have internal predecessors, (472), 48 states have call successors, (48), 23 states have call predecessors, (48), 22 states have return successors, (46), 44 states have call predecessors, (46), 46 states have call successors, (46) [2023-12-02 19:41:59,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 566 transitions. [2023-12-02 19:41:59,083 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 566 transitions. Word has length 46 [2023-12-02 19:41:59,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:41:59,084 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 566 transitions. [2023-12-02 19:41:59,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 19:41:59,084 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 566 transitions. [2023-12-02 19:41:59,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 19:41:59,085 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:41:59,086 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:41:59,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 19:41:59,086 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:41:59,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:41:59,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1686352695, now seen corresponding path program 1 times [2023-12-02 19:41:59,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:41:59,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939972294] [2023-12-02 19:41:59,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:59,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:41:59,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:59,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 19:41:59,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:41:59,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939972294] [2023-12-02 19:41:59,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939972294] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:41:59,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:41:59,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 19:41:59,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577434450] [2023-12-02 19:41:59,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:41:59,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 19:41:59,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:41:59,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 19:41:59,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 19:41:59,225 INFO L87 Difference]: Start difference. First operand 418 states and 566 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 19:41:59,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:41:59,479 INFO L93 Difference]: Finished difference Result 458 states and 613 transitions. [2023-12-02 19:41:59,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 19:41:59,480 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2023-12-02 19:41:59,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:41:59,484 INFO L225 Difference]: With dead ends: 458 [2023-12-02 19:41:59,484 INFO L226 Difference]: Without dead ends: 455 [2023-12-02 19:41:59,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:41:59,485 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 474 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 19:41:59,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 296 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 19:41:59,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2023-12-02 19:41:59,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 417. [2023-12-02 19:41:59,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 346 states have (on average 1.3583815028901733) internal successors, (470), 350 states have internal predecessors, (470), 47 states have call successors, (47), 23 states have call predecessors, (47), 22 states have return successors, (46), 44 states have call predecessors, (46), 46 states have call successors, (46) [2023-12-02 19:41:59,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 563 transitions. [2023-12-02 19:41:59,515 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 563 transitions. Word has length 47 [2023-12-02 19:41:59,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:41:59,515 INFO L495 AbstractCegarLoop]: Abstraction has 417 states and 563 transitions. [2023-12-02 19:41:59,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 19:41:59,515 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 563 transitions. [2023-12-02 19:41:59,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-02 19:41:59,516 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:41:59,517 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:41:59,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 19:41:59,517 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:41:59,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:41:59,518 INFO L85 PathProgramCache]: Analyzing trace with hash -738434295, now seen corresponding path program 1 times [2023-12-02 19:41:59,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:41:59,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998690611] [2023-12-02 19:41:59,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:59,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:41:59,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:59,648 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 19:41:59,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:41:59,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998690611] [2023-12-02 19:41:59,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998690611] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:41:59,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915807509] [2023-12-02 19:41:59,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:59,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:41:59,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:41:59,652 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:41:59,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 19:41:59,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:41:59,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 19:41:59,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:42:00,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:42:00,057 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:42:00,149 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 19:42:00,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915807509] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:42:00,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1935910740] [2023-12-02 19:42:00,172 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2023-12-02 19:42:00,173 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:42:00,176 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:42:00,182 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:42:00,183 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:42:06,529 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 141 for LOIs [2023-12-02 19:42:06,568 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 166 for LOIs [2023-12-02 19:42:06,632 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify_threads with input of size 175 for LOIs [2023-12-02 19:42:08,050 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:42:24,691 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6967#(and (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (<= 1 |#StackHeapBarrier|) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~q_buf_0~0 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (not (= ~p_num_write~0 1)) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (= ~p_last_write~0 0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~m_st~0 0) (= ~E_5~0 2) (= ~q_free~0 1) (= ~c_last_read~0 0) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (<= ~p_num_write~0 1) (= ~m_i~0 0) (= ~p_dw_pc~0 1) (= ~q_write_ev~0 2) (= ~E_2~0 2) (= ~p_dw_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~token~0 0) (= ~q_read_ev~0 2) (= ~c_dr_pc~0 0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (exists ((|v_ULTIMATE.start_eval1_~tmp___0~1#1_BEFORE_CALL_4| Int)) (and (<= |v_ULTIMATE.start_eval1_~tmp___0~1#1_BEFORE_CALL_4| 2147483647) (<= 0 (+ 2147483648 |v_ULTIMATE.start_eval1_~tmp___0~1#1_BEFORE_CALL_4|)) (not (= 0 |v_ULTIMATE.start_eval1_~tmp___0~1#1_BEFORE_CALL_4|)))) (= 0 ~t2_pc~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= 0 ~t4_pc~0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (= ~t1_i~0 0))' at error location [2023-12-02 19:42:24,692 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:42:24,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:42:24,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-12-02 19:42:24,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942401019] [2023-12-02 19:42:24,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:42:24,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 19:42:24,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:42:24,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 19:42:24,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1074, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 19:42:24,695 INFO L87 Difference]: Start difference. First operand 417 states and 563 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 19:42:25,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:42:25,002 INFO L93 Difference]: Finished difference Result 860 states and 1131 transitions. [2023-12-02 19:42:25,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 19:42:25,002 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 48 [2023-12-02 19:42:25,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:42:25,008 INFO L225 Difference]: With dead ends: 860 [2023-12-02 19:42:25,008 INFO L226 Difference]: Without dead ends: 857 [2023-12-02 19:42:25,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 112 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=116, Invalid=1074, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 19:42:25,010 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 570 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 19:42:25,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 1094 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 19:42:25,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2023-12-02 19:42:25,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 626. [2023-12-02 19:42:25,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 523 states have (on average 1.344168260038241) internal successors, (703), 529 states have internal predecessors, (703), 66 states have call successors, (66), 36 states have call predecessors, (66), 35 states have return successors, (65), 61 states have call predecessors, (65), 65 states have call successors, (65) [2023-12-02 19:42:25,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 834 transitions. [2023-12-02 19:42:25,063 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 834 transitions. Word has length 48 [2023-12-02 19:42:25,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:42:25,063 INFO L495 AbstractCegarLoop]: Abstraction has 626 states and 834 transitions. [2023-12-02 19:42:25,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 19:42:25,064 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 834 transitions. [2023-12-02 19:42:25,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-02 19:42:25,065 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:42:25,066 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, 1, 1, 1, 1, 1, 1] [2023-12-02 19:42:25,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 19:42:25,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:42:25,266 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:42:25,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:42:25,267 INFO L85 PathProgramCache]: Analyzing trace with hash 824234195, now seen corresponding path program 1 times [2023-12-02 19:42:25,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:42:25,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351909260] [2023-12-02 19:42:25,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:42:25,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:42:25,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:42:25,347 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 19:42:25,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:42:25,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351909260] [2023-12-02 19:42:25,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351909260] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:42:25,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:42:25,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 19:42:25,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705793604] [2023-12-02 19:42:25,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:42:25,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 19:42:25,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:42:25,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 19:42:25,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 19:42:25,350 INFO L87 Difference]: Start difference. First operand 626 states and 834 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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 19:42:25,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:42:25,648 INFO L93 Difference]: Finished difference Result 911 states and 1279 transitions. [2023-12-02 19:42:25,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 19:42:25,649 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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 55 [2023-12-02 19:42:25,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:42:25,654 INFO L225 Difference]: With dead ends: 911 [2023-12-02 19:42:25,654 INFO L226 Difference]: Without dead ends: 765 [2023-12-02 19:42:25,655 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 19:42:25,656 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 454 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 19:42:25,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 723 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 19:42:25,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2023-12-02 19:42:25,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 764. [2023-12-02 19:42:25,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 637 states have (on average 1.359497645211931) internal successors, (866), 644 states have internal predecessors, (866), 84 states have call successors, (84), 42 states have call predecessors, (84), 41 states have return successors, (83), 78 states have call predecessors, (83), 83 states have call successors, (83) [2023-12-02 19:42:25,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1033 transitions. [2023-12-02 19:42:25,713 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1033 transitions. Word has length 55 [2023-12-02 19:42:25,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:42:25,713 INFO L495 AbstractCegarLoop]: Abstraction has 764 states and 1033 transitions. [2023-12-02 19:42:25,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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 19:42:25,714 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1033 transitions. [2023-12-02 19:42:25,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-02 19:42:25,716 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:42:25,716 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:42:25,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 19:42:25,717 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:42:25,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:42:25,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1032591214, now seen corresponding path program 2 times [2023-12-02 19:42:25,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:42:25,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656367545] [2023-12-02 19:42:25,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:42:25,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:42:25,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:42:25,756 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 19:42:25,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:42:25,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656367545] [2023-12-02 19:42:25,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656367545] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:42:25,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:42:25,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:42:25,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339701725] [2023-12-02 19:42:25,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:42:25,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:42:25,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:42:25,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:42:25,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:42:25,758 INFO L87 Difference]: Start difference. First operand 764 states and 1033 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 19:42:25,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:42:25,867 INFO L93 Difference]: Finished difference Result 1094 states and 1466 transitions. [2023-12-02 19:42:25,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:42:25,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 61 [2023-12-02 19:42:25,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:42:25,872 INFO L225 Difference]: With dead ends: 1094 [2023-12-02 19:42:25,872 INFO L226 Difference]: Without dead ends: 706 [2023-12-02 19:42:25,873 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 19:42:25,873 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 269 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:42:25,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 312 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:42:25,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2023-12-02 19:42:25,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 697. [2023-12-02 19:42:25,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 580 states have (on average 1.353448275862069) internal successors, (785), 588 states have internal predecessors, (785), 78 states have call successors, (78), 38 states have call predecessors, (78), 37 states have return successors, (77), 71 states have call predecessors, (77), 77 states have call successors, (77) [2023-12-02 19:42:25,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 940 transitions. [2023-12-02 19:42:25,922 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 940 transitions. Word has length 61 [2023-12-02 19:42:25,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:42:25,922 INFO L495 AbstractCegarLoop]: Abstraction has 697 states and 940 transitions. [2023-12-02 19:42:25,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 19:42:25,922 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 940 transitions. [2023-12-02 19:42:25,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-02 19:42:25,924 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:42:25,924 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:42:25,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 19:42:25,924 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:42:25,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:42:25,925 INFO L85 PathProgramCache]: Analyzing trace with hash 83629681, now seen corresponding path program 1 times [2023-12-02 19:42:25,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:42:25,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850938384] [2023-12-02 19:42:25,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:42:25,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:42:25,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:42:26,090 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 19:42:26,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:42:26,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850938384] [2023-12-02 19:42:26,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850938384] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:42:26,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254534234] [2023-12-02 19:42:26,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:42:26,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:42:26,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:42:26,093 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:42:26,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 19:42:26,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:42:26,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 19:42:26,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:42:26,244 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 19:42:26,244 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:42:26,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254534234] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:42:26,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:42:26,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 19:42:26,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042439173] [2023-12-02 19:42:26,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:42:26,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:42:26,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:42:26,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:42:26,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:42:26,246 INFO L87 Difference]: Start difference. First operand 697 states and 940 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 19:42:26,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:42:26,356 INFO L93 Difference]: Finished difference Result 824 states and 1099 transitions. [2023-12-02 19:42:26,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:42:26,356 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 73 [2023-12-02 19:42:26,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:42:26,359 INFO L225 Difference]: With dead ends: 824 [2023-12-02 19:42:26,359 INFO L226 Difference]: Without dead ends: 290 [2023-12-02 19:42:26,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:42:26,361 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 25 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:42:26,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 490 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:42:26,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2023-12-02 19:42:26,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2023-12-02 19:42:26,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 237 states have (on average 1.4472573839662448) internal successors, (343), 239 states have internal predecessors, (343), 40 states have call successors, (40), 12 states have call predecessors, (40), 12 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2023-12-02 19:42:26,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 423 transitions. [2023-12-02 19:42:26,379 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 423 transitions. Word has length 73 [2023-12-02 19:42:26,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:42:26,379 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 423 transitions. [2023-12-02 19:42:26,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 19:42:26,379 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 423 transitions. [2023-12-02 19:42:26,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-12-02 19:42:26,381 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:42:26,381 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, 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] [2023-12-02 19:42:26,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 19:42:26,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 19:42:26,584 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:42:26,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:42:26,585 INFO L85 PathProgramCache]: Analyzing trace with hash 248285304, now seen corresponding path program 1 times [2023-12-02 19:42:26,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:42:26,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419196464] [2023-12-02 19:42:26,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:42:26,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:42:26,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:42:26,709 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 19:42:26,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:42:26,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419196464] [2023-12-02 19:42:26,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419196464] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:42:26,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482638214] [2023-12-02 19:42:26,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:42:26,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:42:26,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:42:26,711 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:42:26,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 19:42:26,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:42:26,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 19:42:26,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:42:26,928 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-02 19:42:26,928 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:42:26,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482638214] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:42:26,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:42:26,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 19:42:26,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318816302] [2023-12-02 19:42:26,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:42:26,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:42:26,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:42:26,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:42:26,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:42:26,930 INFO L87 Difference]: Start difference. First operand 290 states and 423 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 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 19:42:27,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:42:27,055 INFO L93 Difference]: Finished difference Result 851 states and 1262 transitions. [2023-12-02 19:42:27,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:42:27,055 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 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 109 [2023-12-02 19:42:27,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:42:27,060 INFO L225 Difference]: With dead ends: 851 [2023-12-02 19:42:27,060 INFO L226 Difference]: Without dead ends: 567 [2023-12-02 19:42:27,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 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 19:42:27,062 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 201 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:42:27,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 402 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:42:27,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2023-12-02 19:42:27,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 563. [2023-12-02 19:42:27,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 464 states have (on average 1.4439655172413792) internal successors, (670), 467 states have internal predecessors, (670), 74 states have call successors, (74), 24 states have call predecessors, (74), 24 states have return successors, (74), 72 states have call predecessors, (74), 74 states have call successors, (74) [2023-12-02 19:42:27,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 818 transitions. [2023-12-02 19:42:27,096 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 818 transitions. Word has length 109 [2023-12-02 19:42:27,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:42:27,097 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 818 transitions. [2023-12-02 19:42:27,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 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 19:42:27,097 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 818 transitions. [2023-12-02 19:42:27,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-12-02 19:42:27,099 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:42:27,099 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, 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] [2023-12-02 19:42:27,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-02 19:42:27,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:42:27,301 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:42:27,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:42:27,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1609128232, now seen corresponding path program 1 times [2023-12-02 19:42:27,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:42:27,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134436750] [2023-12-02 19:42:27,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:42:27,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:42:27,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:42:27,442 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 19:42:27,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:42:27,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134436750] [2023-12-02 19:42:27,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134436750] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:42:27,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55703795] [2023-12-02 19:42:27,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:42:27,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:42:27,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:42:27,444 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:42:27,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 19:42:27,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:42:27,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 755 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 19:42:27,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:42:27,676 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-02 19:42:27,677 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:42:27,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55703795] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:42:27,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:42:27,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 19:42:27,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274136372] [2023-12-02 19:42:27,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:42:27,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:42:27,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:42:27,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:42:27,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:42:27,679 INFO L87 Difference]: Start difference. First operand 563 states and 818 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 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 19:42:27,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:42:27,860 INFO L93 Difference]: Finished difference Result 1664 states and 2457 transitions. [2023-12-02 19:42:27,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:42:27,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 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 109 [2023-12-02 19:42:27,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:42:27,868 INFO L225 Difference]: With dead ends: 1664 [2023-12-02 19:42:27,868 INFO L226 Difference]: Without dead ends: 1107 [2023-12-02 19:42:27,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 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 19:42:27,871 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 195 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:42:27,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 357 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:42:27,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2023-12-02 19:42:27,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 1101. [2023-12-02 19:42:27,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 912 states have (on average 1.4385964912280702) internal successors, (1312), 917 states have internal predecessors, (1312), 140 states have call successors, (140), 48 states have call predecessors, (140), 48 states have return successors, (140), 136 states have call predecessors, (140), 140 states have call successors, (140) [2023-12-02 19:42:27,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 1592 transitions. [2023-12-02 19:42:27,965 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 1592 transitions. Word has length 109 [2023-12-02 19:42:27,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:42:27,965 INFO L495 AbstractCegarLoop]: Abstraction has 1101 states and 1592 transitions. [2023-12-02 19:42:27,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 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 19:42:27,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 1592 transitions. [2023-12-02 19:42:27,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-12-02 19:42:27,969 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:42:27,970 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, 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] [2023-12-02 19:42:27,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 19:42:28,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:42:28,172 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:42:28,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:42:28,173 INFO L85 PathProgramCache]: Analyzing trace with hash 24055096, now seen corresponding path program 1 times [2023-12-02 19:42:28,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:42:28,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007006752] [2023-12-02 19:42:28,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:42:28,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:42:28,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:42:28,308 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 19:42:28,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:42:28,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007006752] [2023-12-02 19:42:28,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007006752] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:42:28,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118794800] [2023-12-02 19:42:28,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:42:28,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:42:28,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:42:28,310 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:42:28,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 19:42:28,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:42:28,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 19:42:28,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:42:28,549 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 19:42:28,550 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:42:28,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118794800] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:42:28,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:42:28,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 19:42:28,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637882980] [2023-12-02 19:42:28,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:42:28,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:42:28,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:42:28,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:42:28,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:42:28,552 INFO L87 Difference]: Start difference. First operand 1101 states and 1592 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 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 19:42:28,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:42:28,791 INFO L93 Difference]: Finished difference Result 3266 states and 4797 transitions. [2023-12-02 19:42:28,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:42:28,792 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 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 109 [2023-12-02 19:42:28,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:42:28,808 INFO L225 Difference]: With dead ends: 3266 [2023-12-02 19:42:28,808 INFO L226 Difference]: Without dead ends: 2171 [2023-12-02 19:42:28,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 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 19:42:28,813 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 189 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:42:28,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 357 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:42:28,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2023-12-02 19:42:29,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2161. [2023-12-02 19:42:29,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2161 states, 1796 states have (on average 1.4320712694877507) internal successors, (2572), 1805 states have internal predecessors, (2572), 268 states have call successors, (268), 96 states have call predecessors, (268), 96 states have return successors, (268), 260 states have call predecessors, (268), 268 states have call successors, (268) [2023-12-02 19:42:29,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2161 states to 2161 states and 3108 transitions. [2023-12-02 19:42:29,021 INFO L78 Accepts]: Start accepts. Automaton has 2161 states and 3108 transitions. Word has length 109 [2023-12-02 19:42:29,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:42:29,021 INFO L495 AbstractCegarLoop]: Abstraction has 2161 states and 3108 transitions. [2023-12-02 19:42:29,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 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 19:42:29,021 INFO L276 IsEmpty]: Start isEmpty. Operand 2161 states and 3108 transitions. [2023-12-02 19:42:29,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-12-02 19:42:29,028 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:42:29,028 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, 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] [2023-12-02 19:42:29,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 19:42:29,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:42:29,231 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:42:29,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:42:29,231 INFO L85 PathProgramCache]: Analyzing trace with hash -852771944, now seen corresponding path program 1 times [2023-12-02 19:42:29,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:42:29,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173239838] [2023-12-02 19:42:29,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:42:29,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:42:29,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:42:29,364 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 19:42:29,364 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:42:29,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173239838] [2023-12-02 19:42:29,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173239838] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:42:29,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332593463] [2023-12-02 19:42:29,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:42:29,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:42:29,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:42:29,366 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:42:29,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 19:42:29,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:42:29,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 19:42:29,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:42:29,592 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 19:42:29,593 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:42:29,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332593463] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:42:29,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:42:29,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 19:42:29,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018636185] [2023-12-02 19:42:29,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:42:29,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:42:29,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:42:29,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:42:29,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:42:29,595 INFO L87 Difference]: Start difference. First operand 2161 states and 3108 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 19:42:29,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:42:29,943 INFO L93 Difference]: Finished difference Result 6422 states and 9377 transitions. [2023-12-02 19:42:29,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:42:29,944 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 109 [2023-12-02 19:42:29,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:42:29,972 INFO L225 Difference]: With dead ends: 6422 [2023-12-02 19:42:29,973 INFO L226 Difference]: Without dead ends: 4267 [2023-12-02 19:42:29,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 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 19:42:29,981 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 183 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:42:29,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 357 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:42:29,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4267 states. [2023-12-02 19:42:30,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4267 to 4249. [2023-12-02 19:42:30,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4249 states, 3540 states have (on average 1.424858757062147) internal successors, (5044), 3557 states have internal predecessors, (5044), 516 states have call successors, (516), 192 states have call predecessors, (516), 192 states have return successors, (516), 500 states have call predecessors, (516), 516 states have call successors, (516) [2023-12-02 19:42:30,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4249 states to 4249 states and 6076 transitions. [2023-12-02 19:42:30,341 INFO L78 Accepts]: Start accepts. Automaton has 4249 states and 6076 transitions. Word has length 109 [2023-12-02 19:42:30,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:42:30,341 INFO L495 AbstractCegarLoop]: Abstraction has 4249 states and 6076 transitions. [2023-12-02 19:42:30,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 19:42:30,342 INFO L276 IsEmpty]: Start isEmpty. Operand 4249 states and 6076 transitions. [2023-12-02 19:42:30,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-12-02 19:42:30,353 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:42:30,354 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, 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] [2023-12-02 19:42:30,361 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 19:42:30,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 19:42:30,554 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:42:30,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:42:30,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1776111112, now seen corresponding path program 1 times [2023-12-02 19:42:30,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:42:30,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248624571] [2023-12-02 19:42:30,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:42:30,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:42:30,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:42:30,668 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-02 19:42:30,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:42:30,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248624571] [2023-12-02 19:42:30,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248624571] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:42:30,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:42:30,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:42:30,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164624752] [2023-12-02 19:42:30,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:42:30,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:42:30,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:42:30,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:42:30,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:42:30,670 INFO L87 Difference]: Start difference. First operand 4249 states and 6076 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 19:42:31,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:42:31,026 INFO L93 Difference]: Finished difference Result 7611 states and 11021 transitions. [2023-12-02 19:42:31,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:42:31,026 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), 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 109 [2023-12-02 19:42:31,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:42:31,054 INFO L225 Difference]: With dead ends: 7611 [2023-12-02 19:42:31,054 INFO L226 Difference]: Without dead ends: 5449 [2023-12-02 19:42:31,060 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 19:42:31,061 INFO L413 NwaCegarLoop]: 287 mSDtfsCounter, 99 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:42:31,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 479 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:42:31,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5449 states. [2023-12-02 19:42:31,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5449 to 5113. [2023-12-02 19:42:31,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5113 states, 4372 states have (on average 1.4574565416285452) internal successors, (6372), 4389 states have internal predecessors, (6372), 532 states have call successors, (532), 208 states have call predecessors, (532), 208 states have return successors, (532), 516 states have call predecessors, (532), 532 states have call successors, (532) [2023-12-02 19:42:31,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5113 states to 5113 states and 7436 transitions. [2023-12-02 19:42:31,398 INFO L78 Accepts]: Start accepts. Automaton has 5113 states and 7436 transitions. Word has length 109 [2023-12-02 19:42:31,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:42:31,399 INFO L495 AbstractCegarLoop]: Abstraction has 5113 states and 7436 transitions. [2023-12-02 19:42:31,399 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), 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 19:42:31,399 INFO L276 IsEmpty]: Start isEmpty. Operand 5113 states and 7436 transitions. [2023-12-02 19:42:31,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-12-02 19:42:31,417 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:42:31,417 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:42:31,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-02 19:42:31,418 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:42:31,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:42:31,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1379090410, now seen corresponding path program 1 times [2023-12-02 19:42:31,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:42:31,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120019685] [2023-12-02 19:42:31,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:42:31,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:42:31,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:42:31,512 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-02 19:42:31,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:42:31,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120019685] [2023-12-02 19:42:31,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120019685] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:42:31,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:42:31,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:42:31,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113252905] [2023-12-02 19:42:31,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:42:31,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:42:31,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:42:31,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:42:31,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:42:31,515 INFO L87 Difference]: Start difference. First operand 5113 states and 7436 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 19:42:32,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:42:32,107 INFO L93 Difference]: Finished difference Result 15182 states and 22321 transitions. [2023-12-02 19:42:32,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:42:32,107 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 148 [2023-12-02 19:42:32,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:42:32,171 INFO L225 Difference]: With dead ends: 15182 [2023-12-02 19:42:32,172 INFO L226 Difference]: Without dead ends: 10075 [2023-12-02 19:42:32,189 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 19:42:32,190 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 184 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:42:32,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 359 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:42:32,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10075 states. [2023-12-02 19:42:32,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10075 to 10025. [2023-12-02 19:42:32,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10025 states, 8580 states have (on average 1.4475524475524475) internal successors, (12420), 8613 states have internal predecessors, (12420), 1028 states have call successors, (1028), 416 states have call predecessors, (1028), 416 states have return successors, (1028), 996 states have call predecessors, (1028), 1028 states have call successors, (1028) [2023-12-02 19:42:32,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10025 states to 10025 states and 14476 transitions. [2023-12-02 19:42:32,955 INFO L78 Accepts]: Start accepts. Automaton has 10025 states and 14476 transitions. Word has length 148 [2023-12-02 19:42:32,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:42:32,955 INFO L495 AbstractCegarLoop]: Abstraction has 10025 states and 14476 transitions. [2023-12-02 19:42:32,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 19:42:32,955 INFO L276 IsEmpty]: Start isEmpty. Operand 10025 states and 14476 transitions. [2023-12-02 19:42:32,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-12-02 19:42:32,977 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:42:32,977 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:42:32,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-12-02 19:42:32,978 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:42:32,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:42:32,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1192268854, now seen corresponding path program 1 times [2023-12-02 19:42:32,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:42:32,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684796583] [2023-12-02 19:42:32,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:42:32,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:42:33,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:42:33,049 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-02 19:42:33,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:42:33,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684796583] [2023-12-02 19:42:33,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684796583] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:42:33,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:42:33,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:42:33,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009164437] [2023-12-02 19:42:33,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:42:33,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:42:33,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:42:33,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:42:33,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:42:33,051 INFO L87 Difference]: Start difference. First operand 10025 states and 14476 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 19:42:34,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:42:34,093 INFO L93 Difference]: Finished difference Result 29774 states and 43441 transitions. [2023-12-02 19:42:34,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:42:34,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 148 [2023-12-02 19:42:34,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:42:34,166 INFO L225 Difference]: With dead ends: 29774 [2023-12-02 19:42:34,166 INFO L226 Difference]: Without dead ends: 19755 [2023-12-02 19:42:34,197 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 19:42:34,198 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 186 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:42:34,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 359 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:42:34,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19755 states. [2023-12-02 19:42:35,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19755 to 19657. [2023-12-02 19:42:35,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19657 states, 16836 states have (on average 1.4371584699453552) internal successors, (24196), 16901 states have internal predecessors, (24196), 1988 states have call successors, (1988), 832 states have call predecessors, (1988), 832 states have return successors, (1988), 1924 states have call predecessors, (1988), 1988 states have call successors, (1988) [2023-12-02 19:42:35,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19657 states to 19657 states and 28172 transitions. [2023-12-02 19:42:35,285 INFO L78 Accepts]: Start accepts. Automaton has 19657 states and 28172 transitions. Word has length 148 [2023-12-02 19:42:35,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:42:35,285 INFO L495 AbstractCegarLoop]: Abstraction has 19657 states and 28172 transitions. [2023-12-02 19:42:35,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 19:42:35,286 INFO L276 IsEmpty]: Start isEmpty. Operand 19657 states and 28172 transitions. [2023-12-02 19:42:35,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-12-02 19:42:35,322 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:42:35,322 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:42:35,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-12-02 19:42:35,323 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:42:35,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:42:35,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1386490821, now seen corresponding path program 1 times [2023-12-02 19:42:35,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:42:35,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621244001] [2023-12-02 19:42:35,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:42:35,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:42:35,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:42:35,386 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-02 19:42:35,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:42:35,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621244001] [2023-12-02 19:42:35,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621244001] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:42:35,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:42:35,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:42:35,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812893674] [2023-12-02 19:42:35,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:42:35,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:42:35,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:42:35,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:42:35,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:42:35,389 INFO L87 Difference]: Start difference. First operand 19657 states and 28172 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 19:42:37,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:42:37,539 INFO L93 Difference]: Finished difference Result 58382 states and 84497 transitions. [2023-12-02 19:42:37,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:42:37,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 148 [2023-12-02 19:42:37,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:42:37,649 INFO L225 Difference]: With dead ends: 58382 [2023-12-02 19:42:37,649 INFO L226 Difference]: Without dead ends: 38731 [2023-12-02 19:42:37,687 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 19:42:37,688 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 188 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:42:37,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 359 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:42:37,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38731 states. [2023-12-02 19:42:39,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38731 to 38537. [2023-12-02 19:42:39,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38537 states, 33028 states have (on average 1.4263049533728958) internal successors, (47108), 33157 states have internal predecessors, (47108), 3844 states have call successors, (3844), 1664 states have call predecessors, (3844), 1664 states have return successors, (3844), 3716 states have call predecessors, (3844), 3844 states have call successors, (3844) [2023-12-02 19:42:39,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38537 states to 38537 states and 54796 transitions. [2023-12-02 19:42:39,582 INFO L78 Accepts]: Start accepts. Automaton has 38537 states and 54796 transitions. Word has length 148 [2023-12-02 19:42:39,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:42:39,582 INFO L495 AbstractCegarLoop]: Abstraction has 38537 states and 54796 transitions. [2023-12-02 19:42:39,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 19:42:39,583 INFO L276 IsEmpty]: Start isEmpty. Operand 38537 states and 54796 transitions. [2023-12-02 19:42:39,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-12-02 19:42:39,647 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:42:39,647 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:42:39,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-12-02 19:42:39,647 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:42:39,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:42:39,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1529592747, now seen corresponding path program 1 times [2023-12-02 19:42:39,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:42:39,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065573668] [2023-12-02 19:42:39,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:42:39,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:42:39,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:42:39,725 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-02 19:42:39,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:42:39,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065573668] [2023-12-02 19:42:39,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065573668] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:42:39,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:42:39,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:42:39,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164034588] [2023-12-02 19:42:39,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:42:39,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:42:39,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:42:39,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:42:39,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:42:39,727 INFO L87 Difference]: Start difference. First operand 38537 states and 54796 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 19:42:43,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:42:43,457 INFO L93 Difference]: Finished difference Result 114446 states and 164241 transitions. [2023-12-02 19:42:43,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:42:43,458 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 148 [2023-12-02 19:42:43,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:42:43,771 INFO L225 Difference]: With dead ends: 114446 [2023-12-02 19:42:43,771 INFO L226 Difference]: Without dead ends: 75915 [2023-12-02 19:42:43,822 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 19:42:43,822 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 190 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:42:43,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 359 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:42:43,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75915 states. [2023-12-02 19:42:47,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75915 to 75529. [2023-12-02 19:42:47,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75529 states, 64772 states have (on average 1.4149941332674612) internal successors, (91652), 65029 states have internal predecessors, (91652), 7428 states have call successors, (7428), 3328 states have call predecessors, (7428), 3328 states have return successors, (7428), 7172 states have call predecessors, (7428), 7428 states have call successors, (7428) [2023-12-02 19:42:47,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75529 states to 75529 states and 106508 transitions. [2023-12-02 19:42:47,718 INFO L78 Accepts]: Start accepts. Automaton has 75529 states and 106508 transitions. Word has length 148 [2023-12-02 19:42:47,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:42:47,718 INFO L495 AbstractCegarLoop]: Abstraction has 75529 states and 106508 transitions. [2023-12-02 19:42:47,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 19:42:47,719 INFO L276 IsEmpty]: Start isEmpty. Operand 75529 states and 106508 transitions. [2023-12-02 19:42:47,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-12-02 19:42:47,886 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:42:47,887 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, 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] [2023-12-02 19:42:47,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-12-02 19:42:47,887 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:42:47,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:42:47,887 INFO L85 PathProgramCache]: Analyzing trace with hash 416846747, now seen corresponding path program 1 times [2023-12-02 19:42:47,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:42:47,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31833769] [2023-12-02 19:42:47,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:42:47,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:42:47,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:42:48,410 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 14 proven. 57 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 19:42:48,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:42:48,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31833769] [2023-12-02 19:42:48,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31833769] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:42:48,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341443922] [2023-12-02 19:42:48,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:42:48,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:42:48,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:42:48,412 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:42:48,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 19:42:48,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:42:48,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 19:42:48,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:42:48,726 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-12-02 19:42:48,726 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:42:48,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341443922] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:42:48,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:42:48,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 19:42:48,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006393604] [2023-12-02 19:42:48,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:42:48,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:42:48,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:42:48,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:42:48,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 19:42:48,729 INFO L87 Difference]: Start difference. First operand 75529 states and 106508 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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 19:42:52,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:42:52,583 INFO L93 Difference]: Finished difference Result 132549 states and 185351 transitions. [2023-12-02 19:42:52,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:42:52,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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 171 [2023-12-02 19:42:52,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:42:52,802 INFO L225 Difference]: With dead ends: 132549 [2023-12-02 19:42:52,802 INFO L226 Difference]: Without dead ends: 94211 [2023-12-02 19:42:52,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 179 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 19:42:52,918 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 179 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:42:52,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 261 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:42:53,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94211 states. [2023-12-02 19:42:57,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94211 to 94211. [2023-12-02 19:42:57,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94211 states, 81922 states have (on average 1.3781157686579917) internal successors, (112898), 82179 states have internal predecessors, (112898), 7938 states have call successors, (7938), 4350 states have call predecessors, (7938), 4350 states have return successors, (7938), 7682 states have call predecessors, (7938), 7938 states have call successors, (7938) [2023-12-02 19:42:58,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94211 states to 94211 states and 128774 transitions. [2023-12-02 19:42:58,008 INFO L78 Accepts]: Start accepts. Automaton has 94211 states and 128774 transitions. Word has length 171 [2023-12-02 19:42:58,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:42:58,008 INFO L495 AbstractCegarLoop]: Abstraction has 94211 states and 128774 transitions. [2023-12-02 19:42:58,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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 19:42:58,009 INFO L276 IsEmpty]: Start isEmpty. Operand 94211 states and 128774 transitions. [2023-12-02 19:42:58,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-12-02 19:42:58,144 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:42:58,144 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, 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] [2023-12-02 19:42:58,151 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 19:42:58,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:42:58,345 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:42:58,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:42:58,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1738667654, now seen corresponding path program 1 times [2023-12-02 19:42:58,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:42:58,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898931232] [2023-12-02 19:42:58,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:42:58,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:42:58,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:42:58,893 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 14 proven. 59 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 19:42:58,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:42:58,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898931232] [2023-12-02 19:42:58,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898931232] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:42:58,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260295885] [2023-12-02 19:42:58,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:42:58,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:42:58,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:42:58,895 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:42:58,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 19:42:59,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:42:59,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 977 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 19:42:59,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:42:59,161 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 19:42:59,161 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:42:59,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260295885] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:42:59,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:42:59,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 19:42:59,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484252380] [2023-12-02 19:42:59,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:42:59,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:42:59,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:42:59,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:42:59,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 19:42:59,163 INFO L87 Difference]: Start difference. First operand 94211 states and 128774 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 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 19:43:04,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:43:04,134 INFO L93 Difference]: Finished difference Result 182021 states and 251780 transitions. [2023-12-02 19:43:04,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:43:04,135 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 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 171 [2023-12-02 19:43:04,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:43:04,622 INFO L225 Difference]: With dead ends: 182021 [2023-12-02 19:43:04,622 INFO L226 Difference]: Without dead ends: 134019 [2023-12-02 19:43:04,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 179 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 19:43:04,682 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 148 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:43:04,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 520 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:43:04,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134019 states. [2023-12-02 19:43:09,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134019 to 112387. [2023-12-02 19:43:09,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112387 states, 99330 states have (on average 1.4097855632739353) internal successors, (140034), 99587 states have internal predecessors, (140034), 8322 states have call successors, (8322), 4734 states have call predecessors, (8322), 4734 states have return successors, (8322), 8066 states have call predecessors, (8322), 8322 states have call successors, (8322) [2023-12-02 19:43:09,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112387 states to 112387 states and 156678 transitions. [2023-12-02 19:43:09,989 INFO L78 Accepts]: Start accepts. Automaton has 112387 states and 156678 transitions. Word has length 171 [2023-12-02 19:43:09,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:43:09,990 INFO L495 AbstractCegarLoop]: Abstraction has 112387 states and 156678 transitions. [2023-12-02 19:43:09,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 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 19:43:09,990 INFO L276 IsEmpty]: Start isEmpty. Operand 112387 states and 156678 transitions. [2023-12-02 19:43:10,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-12-02 19:43:10,126 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:43:10,127 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, 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] [2023-12-02 19:43:10,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-02 19:43:10,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:43:10,328 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:43:10,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:43:10,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1073450871, now seen corresponding path program 2 times [2023-12-02 19:43:10,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:43:10,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307110116] [2023-12-02 19:43:10,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:43:10,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:43:10,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:43:10,648 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-02 19:43:10,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:43:10,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307110116] [2023-12-02 19:43:10,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307110116] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:43:10,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717730348] [2023-12-02 19:43:10,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:43:10,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:43:10,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:43:10,650 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:43:10,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 19:43:10,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 19:43:10,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:43:10,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 19:43:10,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:43:10,877 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 19:43:10,878 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:43:10,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717730348] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:43:10,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:43:10,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-12-02 19:43:10,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670876999] [2023-12-02 19:43:10,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:43:10,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 19:43:10,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:43:10,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 19:43:10,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 19:43:10,880 INFO L87 Difference]: Start difference. First operand 112387 states and 156678 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 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 19:43:19,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:43:19,145 INFO L93 Difference]: Finished difference Result 332533 states and 462774 transitions. [2023-12-02 19:43:19,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 19:43:19,146 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 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 171 [2023-12-02 19:43:19,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:43:19,679 INFO L225 Difference]: With dead ends: 332533 [2023-12-02 19:43:19,679 INFO L226 Difference]: Without dead ends: 220153 [2023-12-02 19:43:19,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 172 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 19:43:19,807 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 176 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:43:19,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 885 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:43:19,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220153 states. [2023-12-02 19:43:28,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220153 to 219639. [2023-12-02 19:43:29,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219639 states, 193790 states have (on average 1.3992775685019867) internal successors, (271166), 194303 states have internal predecessors, (271166), 16382 states have call successors, (16382), 9466 states have call predecessors, (16382), 9466 states have return successors, (16894), 15870 states have call predecessors, (16894), 16382 states have call successors, (16894) [2023-12-02 19:43:30,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219639 states to 219639 states and 304442 transitions. [2023-12-02 19:43:30,016 INFO L78 Accepts]: Start accepts. Automaton has 219639 states and 304442 transitions. Word has length 171 [2023-12-02 19:43:30,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:43:30,016 INFO L495 AbstractCegarLoop]: Abstraction has 219639 states and 304442 transitions. [2023-12-02 19:43:30,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 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 19:43:30,016 INFO L276 IsEmpty]: Start isEmpty. Operand 219639 states and 304442 transitions. [2023-12-02 19:43:30,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-12-02 19:43:30,318 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:43:30,319 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, 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] [2023-12-02 19:43:30,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-02 19:43:30,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-12-02 19:43:30,519 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:43:30,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:43:30,520 INFO L85 PathProgramCache]: Analyzing trace with hash -313230408, now seen corresponding path program 2 times [2023-12-02 19:43:30,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:43:30,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685710868] [2023-12-02 19:43:30,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:43:30,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:43:30,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:43:30,831 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 10 proven. 57 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-12-02 19:43:30,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:43:30,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685710868] [2023-12-02 19:43:30,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685710868] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:43:30,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289124732] [2023-12-02 19:43:30,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:43:30,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:43:30,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:43:30,833 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:43:30,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 19:43:31,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 19:43:31,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:43:31,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 19:43:31,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:43:31,062 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-12-02 19:43:31,062 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:43:31,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289124732] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:43:31,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:43:31,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 19:43:31,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835296612] [2023-12-02 19:43:31,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:43:31,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:43:31,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:43:31,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:43:31,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 19:43:31,064 INFO L87 Difference]: Start difference. First operand 219639 states and 304442 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), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 19:43:40,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:43:40,004 INFO L93 Difference]: Finished difference Result 349179 states and 492476 transitions. [2023-12-02 19:43:40,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:43:40,004 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), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 171 [2023-12-02 19:43:40,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:43:40,779 INFO L225 Difference]: With dead ends: 349179 [2023-12-02 19:43:40,779 INFO L226 Difference]: Without dead ends: 220153 [2023-12-02 19:43:40,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 173 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 19:43:40,932 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 180 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:43:40,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 516 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:43:41,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220153 states. [2023-12-02 19:43:50,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220153 to 219127. [2023-12-02 19:43:50,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219127 states, 193278 states have (on average 1.3870900982005194) internal successors, (268094), 193791 states have internal predecessors, (268094), 16382 states have call successors, (16382), 9466 states have call predecessors, (16382), 9466 states have return successors, (16894), 15870 states have call predecessors, (16894), 16382 states have call successors, (16894) [2023-12-02 19:43:51,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219127 states to 219127 states and 301370 transitions. [2023-12-02 19:43:51,286 INFO L78 Accepts]: Start accepts. Automaton has 219127 states and 301370 transitions. Word has length 171 [2023-12-02 19:43:51,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:43:51,287 INFO L495 AbstractCegarLoop]: Abstraction has 219127 states and 301370 transitions. [2023-12-02 19:43:51,287 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), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 19:43:51,287 INFO L276 IsEmpty]: Start isEmpty. Operand 219127 states and 301370 transitions. [2023-12-02 19:43:51,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-12-02 19:43:51,604 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:43:51,605 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, 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] [2023-12-02 19:43:51,611 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 19:43:51,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-12-02 19:43:51,805 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:43:51,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:43:51,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1177554472, now seen corresponding path program 1 times [2023-12-02 19:43:51,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:43:51,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797272232] [2023-12-02 19:43:51,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:43:51,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:43:51,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:43:52,380 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-12-02 19:43:52,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:43:52,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797272232] [2023-12-02 19:43:52,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797272232] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:43:52,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291606541] [2023-12-02 19:43:52,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:43:52,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:43:52,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:43:52,382 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:43:52,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 19:43:52,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:43:52,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 19:43:52,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:43:52,615 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 19:43:52,616 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:43:52,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291606541] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:43:52,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:43:52,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 19:43:52,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004610887] [2023-12-02 19:43:52,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:43:52,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:43:52,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:43:52,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:43:52,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 19:43:52,618 INFO L87 Difference]: Start difference. First operand 219127 states and 301370 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 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 19:44:01,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:44:01,762 INFO L93 Difference]: Finished difference Result 330293 states and 459700 transitions. [2023-12-02 19:44:01,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:44:01,763 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 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 171 [2023-12-02 19:44:01,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:44:02,336 INFO L225 Difference]: With dead ends: 330293 [2023-12-02 19:44:02,336 INFO L226 Difference]: Without dead ends: 219385 [2023-12-02 19:44:02,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 173 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 19:44:02,496 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 179 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:44:02,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 514 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:44:02,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219385 states. [2023-12-02 19:44:12,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219385 to 218487. [2023-12-02 19:44:12,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218487 states, 192638 states have (on average 1.3770803268306357) internal successors, (265278), 193151 states have internal predecessors, (265278), 16382 states have call successors, (16382), 9466 states have call predecessors, (16382), 9466 states have return successors, (16894), 15870 states have call predecessors, (16894), 16382 states have call successors, (16894) [2023-12-02 19:44:13,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218487 states to 218487 states and 298554 transitions. [2023-12-02 19:44:13,354 INFO L78 Accepts]: Start accepts. Automaton has 218487 states and 298554 transitions. Word has length 171 [2023-12-02 19:44:13,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:44:13,355 INFO L495 AbstractCegarLoop]: Abstraction has 218487 states and 298554 transitions. [2023-12-02 19:44:13,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 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 19:44:13,355 INFO L276 IsEmpty]: Start isEmpty. Operand 218487 states and 298554 transitions. [2023-12-02 19:44:13,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-12-02 19:44:13,676 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:44:13,676 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, 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, 1, 1] [2023-12-02 19:44:13,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 19:44:13,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:44:13,877 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:44:13,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:44:13,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1144564283, now seen corresponding path program 1 times [2023-12-02 19:44:13,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:44:13,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954927811] [2023-12-02 19:44:13,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:44:13,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:44:13,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:44:14,609 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 12 proven. 56 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-12-02 19:44:14,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:44:14,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954927811] [2023-12-02 19:44:14,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954927811] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:44:14,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16296016] [2023-12-02 19:44:14,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:44:14,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:44:14,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:44:14,610 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:44:14,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 19:44:14,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:44:14,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 1110 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 19:44:14,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:44:14,950 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 82 proven. 23 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 19:44:14,950 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:44:15,267 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 13 proven. 56 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-12-02 19:44:15,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16296016] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:44:15,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1358909482] [2023-12-02 19:44:15,271 INFO L159 IcfgInterpreter]: Started Sifa with 86 locations of interest [2023-12-02 19:44:15,272 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:44:15,272 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:44:15,273 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:44:15,273 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:44:38,114 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 1 for LOIs [2023-12-02 19:44:38,126 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 1 for LOIs [2023-12-02 19:44:38,160 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 1 for LOIs [2023-12-02 19:44:38,161 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 45 for LOIs [2023-12-02 19:44:38,281 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 1 for LOIs [2023-12-02 19:44:38,512 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 1 for LOIs [2023-12-02 19:44:38,524 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:44:54,829 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3053946#(and (<= 0 (+ |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483648)) (<= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483647) (<= 0 |ULTIMATE.start_eval2_~tmp~4#1|) (= ~m_pc~0 1) (= |ULTIMATE.start_start_simulation2_~kernel_st~1#1| 1) (<= |ULTIMATE.start_eval2_~tmp~4#1| 1) (= ~m_st~0 1) (not (= ~token~0 (+ 8 ~local~0))))' at error location [2023-12-02 19:44:54,829 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:44:54,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:44:54,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 13 [2023-12-02 19:44:54,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678797041] [2023-12-02 19:44:54,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:44:54,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 19:44:54,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:44:54,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 19:44:54,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=6110, Unknown=0, NotChecked=0, Total=6642 [2023-12-02 19:44:54,835 INFO L87 Difference]: Start difference. First operand 218487 states and 298554 transitions. Second operand has 13 states, 13 states have (on average 18.076923076923077) internal successors, (235), 13 states have internal predecessors, (235), 8 states have call successors, (35), 7 states have call predecessors, (35), 8 states have return successors, (35), 8 states have call predecessors, (35), 8 states have call successors, (35) [2023-12-02 19:45:07,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:45:07,263 INFO L93 Difference]: Finished difference Result 499739 states and 678259 transitions. [2023-12-02 19:45:07,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-02 19:45:07,264 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 18.076923076923077) internal successors, (235), 13 states have internal predecessors, (235), 8 states have call successors, (35), 7 states have call predecessors, (35), 8 states have return successors, (35), 8 states have call predecessors, (35), 8 states have call successors, (35) Word has length 168 [2023-12-02 19:45:07,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:45:08,189 INFO L225 Difference]: With dead ends: 499739 [2023-12-02 19:45:08,189 INFO L226 Difference]: Without dead ends: 281259 [2023-12-02 19:45:08,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 445 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3822 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=914, Invalid=10216, Unknown=0, NotChecked=0, Total=11130 [2023-12-02 19:45:08,386 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 2774 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 633 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2774 SdHoareTripleChecker+Valid, 1237 SdHoareTripleChecker+Invalid, 1284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 633 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 19:45:08,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2774 Valid, 1237 Invalid, 1284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [633 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 19:45:08,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281259 states. [2023-12-02 19:45:20,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281259 to 256762. [2023-12-02 19:45:20,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256762 states, 227000 states have (on average 1.36152422907489) internal successors, (309066), 227961 states have internal predecessors, (309066), 18340 states have call successors, (18340), 10653 states have call predecessors, (18340), 11421 states have return successors, (19108), 18148 states have call predecessors, (19108), 18340 states have call successors, (19108) [2023-12-02 19:45:21,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256762 states to 256762 states and 346514 transitions. [2023-12-02 19:45:21,849 INFO L78 Accepts]: Start accepts. Automaton has 256762 states and 346514 transitions. Word has length 168 [2023-12-02 19:45:21,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:45:21,850 INFO L495 AbstractCegarLoop]: Abstraction has 256762 states and 346514 transitions. [2023-12-02 19:45:21,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.076923076923077) internal successors, (235), 13 states have internal predecessors, (235), 8 states have call successors, (35), 7 states have call predecessors, (35), 8 states have return successors, (35), 8 states have call predecessors, (35), 8 states have call successors, (35) [2023-12-02 19:45:21,850 INFO L276 IsEmpty]: Start isEmpty. Operand 256762 states and 346514 transitions. [2023-12-02 19:45:22,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2023-12-02 19:45:22,201 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:45:22,201 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:45:22,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 19:45:22,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:45:22,401 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:45:22,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:45:22,402 INFO L85 PathProgramCache]: Analyzing trace with hash 318431274, now seen corresponding path program 1 times [2023-12-02 19:45:22,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:45:22,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041792438] [2023-12-02 19:45:22,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:45:22,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:45:22,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:45:23,018 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-12-02 19:45:23,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:45:23,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041792438] [2023-12-02 19:45:23,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041792438] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:45:23,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902030036] [2023-12-02 19:45:23,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:45:23,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:45:23,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:45:23,020 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:45:23,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 19:45:23,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:45:23,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 19:45:23,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:45:23,229 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-02 19:45:23,229 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:45:23,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902030036] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:45:23,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:45:23,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 19:45:23,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450391165] [2023-12-02 19:45:23,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:45:23,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:45:23,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:45:23,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:45:23,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 19:45:23,231 INFO L87 Difference]: Start difference. First operand 256762 states and 346514 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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 19:45:34,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:45:34,323 INFO L93 Difference]: Finished difference Result 356342 states and 483885 transitions. [2023-12-02 19:45:34,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:45:34,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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 177 [2023-12-02 19:45:34,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:45:35,001 INFO L225 Difference]: With dead ends: 356342 [2023-12-02 19:45:35,001 INFO L226 Difference]: Without dead ends: 244410 [2023-12-02 19:45:35,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 179 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 19:45:35,130 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 52 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:45:35,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 388 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:45:35,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244410 states. [2023-12-02 19:45:47,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244410 to 228986. [2023-12-02 19:45:47,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228986 states, 201528 states have (on average 1.3754614743360725) internal successors, (277194), 201913 states have internal predecessors, (277194), 17572 states have call successors, (17572), 9885 states have call predecessors, (17572), 9885 states have return successors, (17572), 17188 states have call predecessors, (17572), 17572 states have call successors, (17572) [2023-12-02 19:45:47,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228986 states to 228986 states and 312338 transitions. [2023-12-02 19:45:47,842 INFO L78 Accepts]: Start accepts. Automaton has 228986 states and 312338 transitions. Word has length 177 [2023-12-02 19:45:47,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:45:47,843 INFO L495 AbstractCegarLoop]: Abstraction has 228986 states and 312338 transitions. [2023-12-02 19:45:47,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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 19:45:47,843 INFO L276 IsEmpty]: Start isEmpty. Operand 228986 states and 312338 transitions. [2023-12-02 19:45:48,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-12-02 19:45:48,497 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:45:48,497 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, 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, 1] [2023-12-02 19:45:48,505 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 19:45:48,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:45:48,698 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:45:48,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:45:48,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1218149865, now seen corresponding path program 1 times [2023-12-02 19:45:48,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:45:48,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794679383] [2023-12-02 19:45:48,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:45:48,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:45:48,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:45:48,901 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-12-02 19:45:48,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:45:48,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794679383] [2023-12-02 19:45:48,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794679383] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:45:48,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680694294] [2023-12-02 19:45:48,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:45:48,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:45:48,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:45:48,902 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:45:48,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81c2820c-1d8e-454e-8783-ceacfb3919a8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 19:45:49,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:45:49,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 1003 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 19:45:49,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:45:49,110 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-02 19:45:49,110 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:45:49,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680694294] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:45:49,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:45:49,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 19:45:49,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880235560] [2023-12-02 19:45:49,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:45:49,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:45:49,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:45:49,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:45:49,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 19:45:49,112 INFO L87 Difference]: Start difference. First operand 228986 states and 312338 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 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 19:46:07,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:46:07,538 INFO L93 Difference]: Finished difference Result 557644 states and 770891 transitions. [2023-12-02 19:46:07,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:46:07,539 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 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 178 [2023-12-02 19:46:07,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:46:08,342 INFO L225 Difference]: With dead ends: 557644 [2023-12-02 19:46:08,343 INFO L226 Difference]: Without dead ends: 328722 [2023-12-02 19:46:08,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 180 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 19:46:08,779 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 98 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:46:08,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 378 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:46:09,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328722 states. [2023-12-02 19:46:23,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328722 to 267438. [2023-12-02 19:46:24,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267438 states, 238250 states have (on average 1.3967681007345225) internal successors, (332780), 238636 states have internal predecessors, (332780), 18437 states have call successors, (18437), 10750 states have call predecessors, (18437), 10750 states have return successors, (18437), 18052 states have call predecessors, (18437), 18437 states have call successors, (18437)