./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.03.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/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_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.03.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/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_0e99f6df-d353-4a4d-b224-e91c2c9f0386/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 e96a4dadf08c19b3d92d901d7f9116f0323f4fb1660ac2537112df0afe321751 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 12:40:58,495 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 12:40:58,560 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 12:40:58,564 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 12:40:58,565 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 12:40:58,590 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 12:40:58,591 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 12:40:58,591 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 12:40:58,592 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 12:40:58,592 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 12:40:58,593 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 12:40:58,593 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 12:40:58,594 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 12:40:58,594 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 12:40:58,595 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 12:40:58,595 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 12:40:58,596 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 12:40:58,596 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 12:40:58,597 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 12:40:58,597 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 12:40:58,598 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 12:40:58,600 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 12:40:58,601 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 12:40:58,602 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 12:40:58,602 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 12:40:58,602 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 12:40:58,603 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 12:40:58,603 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 12:40:58,603 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 12:40:58,604 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 12:40:58,604 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 12:40:58,604 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 12:40:58,605 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 12:40:58,605 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 12:40:58,605 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 12:40:58,605 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 12:40:58,605 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 12:40:58,606 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:40:58,606 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 12:40:58,606 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 12:40:58,606 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 12:40:58,607 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 12:40:58,607 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 12:40:58,607 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 12:40:58,607 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 12:40:58,607 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 12:40:58,608 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 12:40:58,608 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_0e99f6df-d353-4a4d-b224-e91c2c9f0386/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e96a4dadf08c19b3d92d901d7f9116f0323f4fb1660ac2537112df0afe321751 [2023-12-02 12:40:58,822 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 12:40:58,843 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 12:40:58,846 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 12:40:58,847 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 12:40:58,848 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 12:40:58,849 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/systemc/token_ring.03.cil-1.c [2023-12-02 12:41:01,636 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 12:41:01,836 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 12:41:01,837 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/sv-benchmarks/c/systemc/token_ring.03.cil-1.c [2023-12-02 12:41:01,848 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/data/70ea07026/020cb01fe49d46598932e7c911b6404c/FLAG62e428636 [2023-12-02 12:41:01,862 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/data/70ea07026/020cb01fe49d46598932e7c911b6404c [2023-12-02 12:41:01,864 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 12:41:01,866 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 12:41:01,867 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 12:41:01,867 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 12:41:01,872 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 12:41:01,873 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:41:01" (1/1) ... [2023-12-02 12:41:01,874 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20558eb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:41:01, skipping insertion in model container [2023-12-02 12:41:01,874 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:41:01" (1/1) ... [2023-12-02 12:41:01,915 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 12:41:02,042 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_0e99f6df-d353-4a4d-b224-e91c2c9f0386/sv-benchmarks/c/systemc/token_ring.03.cil-1.c[671,684] [2023-12-02 12:41:02,100 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:41:02,110 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 12:41:02,122 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_0e99f6df-d353-4a4d-b224-e91c2c9f0386/sv-benchmarks/c/systemc/token_ring.03.cil-1.c[671,684] [2023-12-02 12:41:02,150 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:41:02,163 INFO L206 MainTranslator]: Completed translation [2023-12-02 12:41:02,163 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:41:02 WrapperNode [2023-12-02 12:41:02,164 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 12:41:02,165 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 12:41:02,165 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 12:41:02,165 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 12:41:02,171 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:41:02" (1/1) ... [2023-12-02 12:41:02,178 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:41:02" (1/1) ... [2023-12-02 12:41:02,203 INFO L138 Inliner]: procedures = 34, calls = 41, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 345 [2023-12-02 12:41:02,204 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 12:41:02,204 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 12:41:02,204 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 12:41:02,204 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 12:41:02,211 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:41:02" (1/1) ... [2023-12-02 12:41:02,211 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:41:02" (1/1) ... [2023-12-02 12:41:02,214 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:41:02" (1/1) ... [2023-12-02 12:41:02,214 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:41:02" (1/1) ... [2023-12-02 12:41:02,221 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:41:02" (1/1) ... [2023-12-02 12:41:02,228 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:41:02" (1/1) ... [2023-12-02 12:41:02,231 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:41:02" (1/1) ... [2023-12-02 12:41:02,233 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:41:02" (1/1) ... [2023-12-02 12:41:02,236 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 12:41:02,237 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 12:41:02,238 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 12:41:02,238 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 12:41:02,239 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:41:02" (1/1) ... [2023-12-02 12:41:02,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:41:02,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:41:02,266 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 12:41:02,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 12:41:02,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 12:41:02,301 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-12-02 12:41:02,301 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-12-02 12:41:02,301 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-12-02 12:41:02,302 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-12-02 12:41:02,302 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-12-02 12:41:02,302 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-12-02 12:41:02,302 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-12-02 12:41:02,302 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-12-02 12:41:02,302 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-12-02 12:41:02,302 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-12-02 12:41:02,303 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-12-02 12:41:02,303 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-12-02 12:41:02,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 12:41:02,303 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-12-02 12:41:02,303 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-12-02 12:41:02,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 12:41:02,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 12:41:02,384 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 12:41:02,387 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 12:41:02,761 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 12:41:02,971 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 12:41:02,971 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-12-02 12:41:02,973 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:41:02 BoogieIcfgContainer [2023-12-02 12:41:02,973 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 12:41:02,976 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 12:41:02,976 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 12:41:02,980 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 12:41:02,980 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:41:01" (1/3) ... [2023-12-02 12:41:02,981 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79f9a17b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:41:02, skipping insertion in model container [2023-12-02 12:41:02,981 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:41:02" (2/3) ... [2023-12-02 12:41:02,982 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79f9a17b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:41:02, skipping insertion in model container [2023-12-02 12:41:02,982 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:41:02" (3/3) ... [2023-12-02 12:41:02,983 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.03.cil-1.c [2023-12-02 12:41:03,004 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 12:41:03,004 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 12:41:03,055 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 12:41:03,062 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;@13e5c1f8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 12:41:03,062 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 12:41:03,066 INFO L276 IsEmpty]: Start isEmpty. Operand has 99 states, 71 states have (on average 1.4929577464788732) internal successors, (106), 75 states have internal predecessors, (106), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2023-12-02 12:41:03,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-02 12:41:03,076 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:41:03,077 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] [2023-12-02 12:41:03,077 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:41:03,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:41:03,081 INFO L85 PathProgramCache]: Analyzing trace with hash 720339040, now seen corresponding path program 1 times [2023-12-02 12:41:03,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:41:03,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254622749] [2023-12-02 12:41:03,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:03,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:41:03,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:03,407 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 12:41:03,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:41:03,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254622749] [2023-12-02 12:41:03,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254622749] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:41:03,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:41:03,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 12:41:03,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706412606] [2023-12-02 12:41:03,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:41:03,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:41:03,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:41:03,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:41:03,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:41:03,445 INFO L87 Difference]: Start difference. First operand has 99 states, 71 states have (on average 1.4929577464788732) internal successors, (106), 75 states have internal predecessors, (106), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 12:41:03,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:41:03,769 INFO L93 Difference]: Finished difference Result 273 states and 410 transitions. [2023-12-02 12:41:03,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:41:03,771 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2023-12-02 12:41:03,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:41:03,782 INFO L225 Difference]: With dead ends: 273 [2023-12-02 12:41:03,782 INFO L226 Difference]: Without dead ends: 175 [2023-12-02 12:41:03,787 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 12:41:03,791 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 227 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:41:03,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 334 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:41:03,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-12-02 12:41:03,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2023-12-02 12:41:03,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 129 states have (on average 1.37984496124031) internal successors, (178), 132 states have internal predecessors, (178), 32 states have call successors, (32), 13 states have call predecessors, (32), 12 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2023-12-02 12:41:03,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 240 transitions. [2023-12-02 12:41:03,856 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 240 transitions. Word has length 40 [2023-12-02 12:41:03,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:41:03,856 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 240 transitions. [2023-12-02 12:41:03,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 12:41:03,857 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 240 transitions. [2023-12-02 12:41:03,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-02 12:41:03,862 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:41:03,862 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:41:03,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 12:41:03,863 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:41:03,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:41:03,864 INFO L85 PathProgramCache]: Analyzing trace with hash 17474601, now seen corresponding path program 1 times [2023-12-02 12:41:03,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:41:03,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775540192] [2023-12-02 12:41:03,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:03,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:41:03,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:04,048 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 12:41:04,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:41:04,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775540192] [2023-12-02 12:41:04,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775540192] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:41:04,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365725334] [2023-12-02 12:41:04,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:04,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:41:04,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:41:04,051 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:41:04,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 12:41:04,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:04,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 12:41:04,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:41:04,280 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 12:41:04,281 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:41:04,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365725334] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:41:04,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:41:04,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 12:41:04,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761940683] [2023-12-02 12:41:04,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:41:04,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:41:04,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:41:04,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:41:04,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:41:04,285 INFO L87 Difference]: Start difference. First operand 174 states and 240 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 12:41:04,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:41:04,385 INFO L93 Difference]: Finished difference Result 505 states and 705 transitions. [2023-12-02 12:41:04,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:41:04,385 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 74 [2023-12-02 12:41:04,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:41:04,391 INFO L225 Difference]: With dead ends: 505 [2023-12-02 12:41:04,391 INFO L226 Difference]: Without dead ends: 336 [2023-12-02 12:41:04,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 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 12:41:04,395 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 111 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:41:04,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 253 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:41:04,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2023-12-02 12:41:04,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 330. [2023-12-02 12:41:04,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 249 states have (on average 1.3694779116465863) internal successors, (341), 253 states have internal predecessors, (341), 56 states have call successors, (56), 25 states have call predecessors, (56), 24 states have return successors, (54), 52 states have call predecessors, (54), 54 states have call successors, (54) [2023-12-02 12:41:04,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 451 transitions. [2023-12-02 12:41:04,442 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 451 transitions. Word has length 74 [2023-12-02 12:41:04,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:41:04,443 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 451 transitions. [2023-12-02 12:41:04,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 12:41:04,443 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 451 transitions. [2023-12-02 12:41:04,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-02 12:41:04,447 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:41:04,447 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:41:04,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 12:41:04,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:41:04,653 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:41:04,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:41:04,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1432611801, now seen corresponding path program 1 times [2023-12-02 12:41:04,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:41:04,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983076588] [2023-12-02 12:41:04,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:04,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:41:04,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:04,804 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 12:41:04,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:41:04,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983076588] [2023-12-02 12:41:04,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983076588] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:41:04,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830970721] [2023-12-02 12:41:04,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:04,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:41:04,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:41:04,806 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:41:04,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 12:41:04,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:04,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 12:41:04,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:41:04,980 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 12:41:04,980 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:41:04,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830970721] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:41:04,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:41:04,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 12:41:04,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309483928] [2023-12-02 12:41:04,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:41:04,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:41:04,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:41:04,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:41:04,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:41:04,984 INFO L87 Difference]: Start difference. First operand 330 states and 451 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 12:41:05,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:41:05,090 INFO L93 Difference]: Finished difference Result 967 states and 1338 transitions. [2023-12-02 12:41:05,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:41:05,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 74 [2023-12-02 12:41:05,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:41:05,097 INFO L225 Difference]: With dead ends: 967 [2023-12-02 12:41:05,098 INFO L226 Difference]: Without dead ends: 642 [2023-12-02 12:41:05,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 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 12:41:05,101 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 108 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:41:05,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 211 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:41:05,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2023-12-02 12:41:05,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 634. [2023-12-02 12:41:05,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 483 states have (on average 1.3561076604554865) internal successors, (655), 489 states have internal predecessors, (655), 102 states have call successors, (102), 49 states have call predecessors, (102), 48 states have return successors, (100), 96 states have call predecessors, (100), 100 states have call successors, (100) [2023-12-02 12:41:05,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 857 transitions. [2023-12-02 12:41:05,158 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 857 transitions. Word has length 74 [2023-12-02 12:41:05,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:41:05,158 INFO L495 AbstractCegarLoop]: Abstraction has 634 states and 857 transitions. [2023-12-02 12:41:05,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 12:41:05,159 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 857 transitions. [2023-12-02 12:41:05,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-02 12:41:05,161 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:41:05,162 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:41:05,168 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 12:41:05,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:41:05,368 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:41:05,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:41:05,368 INFO L85 PathProgramCache]: Analyzing trace with hash -303377175, now seen corresponding path program 1 times [2023-12-02 12:41:05,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:41:05,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376348707] [2023-12-02 12:41:05,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:05,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:41:05,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:05,760 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 12:41:05,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:41:05,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376348707] [2023-12-02 12:41:05,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376348707] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:41:05,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:41:05,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 12:41:05,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535085712] [2023-12-02 12:41:05,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:41:05,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:41:05,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:41:05,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:41:05,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:41:05,763 INFO L87 Difference]: Start difference. First operand 634 states and 857 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 12:41:06,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:41:06,191 INFO L93 Difference]: Finished difference Result 1938 states and 2615 transitions. [2023-12-02 12:41:06,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 12:41:06,192 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 74 [2023-12-02 12:41:06,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:41:06,204 INFO L225 Difference]: With dead ends: 1938 [2023-12-02 12:41:06,204 INFO L226 Difference]: Without dead ends: 1310 [2023-12-02 12:41:06,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-12-02 12:41:06,208 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 309 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:41:06,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 367 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 12:41:06,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2023-12-02 12:41:06,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 1210. [2023-12-02 12:41:06,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 923 states have (on average 1.3380281690140845) internal successors, (1235), 933 states have internal predecessors, (1235), 190 states have call successors, (190), 97 states have call predecessors, (190), 96 states have return successors, (188), 180 states have call predecessors, (188), 188 states have call successors, (188) [2023-12-02 12:41:06,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1613 transitions. [2023-12-02 12:41:06,343 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1613 transitions. Word has length 74 [2023-12-02 12:41:06,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:41:06,343 INFO L495 AbstractCegarLoop]: Abstraction has 1210 states and 1613 transitions. [2023-12-02 12:41:06,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 12:41:06,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1613 transitions. [2023-12-02 12:41:06,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-12-02 12:41:06,347 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:41:06,348 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, 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 12:41:06,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 12:41:06,348 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:41:06,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:41:06,349 INFO L85 PathProgramCache]: Analyzing trace with hash 294895781, now seen corresponding path program 1 times [2023-12-02 12:41:06,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:41:06,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241327337] [2023-12-02 12:41:06,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:06,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:41:06,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:06,578 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 12:41:06,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:41:06,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241327337] [2023-12-02 12:41:06,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241327337] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:41:06,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272188117] [2023-12-02 12:41:06,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:06,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:41:06,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:41:06,581 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:41:06,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 12:41:06,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:06,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 12:41:06,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:41:06,751 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 12:41:06,751 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:41:06,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272188117] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:41:06,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:41:06,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 12:41:06,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173823358] [2023-12-02 12:41:06,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:41:06,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:41:06,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:41:06,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:41:06,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:41:06,754 INFO L87 Difference]: Start difference. First operand 1210 states and 1613 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 12:41:06,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:41:06,895 INFO L93 Difference]: Finished difference Result 2161 states and 2906 transitions. [2023-12-02 12:41:06,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:41:06,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 88 [2023-12-02 12:41:06,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:41:06,907 INFO L225 Difference]: With dead ends: 2161 [2023-12-02 12:41:06,908 INFO L226 Difference]: Without dead ends: 1525 [2023-12-02 12:41:06,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 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 12:41:06,911 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 47 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:41:06,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 276 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:41:06,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1525 states. [2023-12-02 12:41:07,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1525 to 1394. [2023-12-02 12:41:07,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1394 states, 1091 states have (on average 1.3593033913840513) internal successors, (1483), 1101 states have internal predecessors, (1483), 198 states have call successors, (198), 105 states have call predecessors, (198), 104 states have return successors, (196), 188 states have call predecessors, (196), 196 states have call successors, (196) [2023-12-02 12:41:07,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 1877 transitions. [2023-12-02 12:41:07,024 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 1877 transitions. Word has length 88 [2023-12-02 12:41:07,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:41:07,024 INFO L495 AbstractCegarLoop]: Abstraction has 1394 states and 1877 transitions. [2023-12-02 12:41:07,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 12:41:07,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 1877 transitions. [2023-12-02 12:41:07,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-12-02 12:41:07,031 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:41:07,031 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 12:41:07,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 12:41:07,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:41:07,232 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:41:07,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:41:07,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1671570742, now seen corresponding path program 1 times [2023-12-02 12:41:07,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:41:07,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091567017] [2023-12-02 12:41:07,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:07,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:41:07,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:07,303 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 12:41:07,303 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:41:07,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091567017] [2023-12-02 12:41:07,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091567017] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:41:07,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:41:07,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:41:07,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496928684] [2023-12-02 12:41:07,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:41:07,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:41:07,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:41:07,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:41:07,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:41:07,306 INFO L87 Difference]: Start difference. First operand 1394 states and 1877 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 12:41:07,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:41:07,522 INFO L93 Difference]: Finished difference Result 3475 states and 4706 transitions. [2023-12-02 12:41:07,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:41:07,523 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 98 [2023-12-02 12:41:07,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:41:07,538 INFO L225 Difference]: With dead ends: 3475 [2023-12-02 12:41:07,538 INFO L226 Difference]: Without dead ends: 2086 [2023-12-02 12:41:07,543 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 12:41:07,543 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 103 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:41:07,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 253 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:41:07,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2023-12-02 12:41:07,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 2070. [2023-12-02 12:41:07,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2070 states, 1623 states have (on average 1.3450400492914356) internal successors, (2183), 1637 states have internal predecessors, (2183), 290 states have call successors, (290), 157 states have call predecessors, (290), 156 states have return successors, (288), 276 states have call predecessors, (288), 288 states have call successors, (288) [2023-12-02 12:41:07,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2070 states to 2070 states and 2761 transitions. [2023-12-02 12:41:07,705 INFO L78 Accepts]: Start accepts. Automaton has 2070 states and 2761 transitions. Word has length 98 [2023-12-02 12:41:07,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:41:07,706 INFO L495 AbstractCegarLoop]: Abstraction has 2070 states and 2761 transitions. [2023-12-02 12:41:07,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 12:41:07,706 INFO L276 IsEmpty]: Start isEmpty. Operand 2070 states and 2761 transitions. [2023-12-02 12:41:07,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-12-02 12:41:07,715 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:41:07,715 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 12:41:07,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 12:41:07,716 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:41:07,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:41:07,716 INFO L85 PathProgramCache]: Analyzing trace with hash 2037554418, now seen corresponding path program 1 times [2023-12-02 12:41:07,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:41:07,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982992666] [2023-12-02 12:41:07,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:07,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:41:07,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:07,973 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-02 12:41:07,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:41:07,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982992666] [2023-12-02 12:41:07,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982992666] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:41:07,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064525431] [2023-12-02 12:41:07,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:07,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:41:07,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:41:07,975 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:41:07,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 12:41:08,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:08,116 INFO L262 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 12:41:08,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:41:08,170 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 12:41:08,170 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:41:08,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064525431] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:41:08,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:41:08,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 12:41:08,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495434366] [2023-12-02 12:41:08,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:41:08,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:41:08,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:41:08,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:41:08,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:41:08,172 INFO L87 Difference]: Start difference. First operand 2070 states and 2761 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 12:41:08,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:41:08,403 INFO L93 Difference]: Finished difference Result 3470 states and 4727 transitions. [2023-12-02 12:41:08,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:41:08,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 112 [2023-12-02 12:41:08,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:41:08,418 INFO L225 Difference]: With dead ends: 3470 [2023-12-02 12:41:08,419 INFO L226 Difference]: Without dead ends: 2082 [2023-12-02 12:41:08,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 114 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 12:41:08,424 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 102 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:41:08,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 269 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:41:08,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2082 states. [2023-12-02 12:41:08,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2082 to 2062. [2023-12-02 12:41:08,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 1615 states have (on average 1.3219814241486068) internal successors, (2135), 1629 states have internal predecessors, (2135), 290 states have call successors, (290), 157 states have call predecessors, (290), 156 states have return successors, (288), 276 states have call predecessors, (288), 288 states have call successors, (288) [2023-12-02 12:41:08,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 2713 transitions. [2023-12-02 12:41:08,580 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 2713 transitions. Word has length 112 [2023-12-02 12:41:08,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:41:08,580 INFO L495 AbstractCegarLoop]: Abstraction has 2062 states and 2713 transitions. [2023-12-02 12:41:08,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 12:41:08,581 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 2713 transitions. [2023-12-02 12:41:08,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-12-02 12:41:08,588 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:41:08,589 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:41:08,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-02 12:41:08,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:41:08,792 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:41:08,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:41:08,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1092140014, now seen corresponding path program 1 times [2023-12-02 12:41:08,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:41:08,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107163033] [2023-12-02 12:41:08,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:08,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:41:08,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:09,060 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-02 12:41:09,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:41:09,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107163033] [2023-12-02 12:41:09,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107163033] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:41:09,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093836354] [2023-12-02 12:41:09,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:09,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:41:09,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:41:09,062 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:41:09,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 12:41:09,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:09,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 12:41:09,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:41:09,233 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 12:41:09,233 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:41:09,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093836354] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:41:09,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:41:09,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 12:41:09,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263617804] [2023-12-02 12:41:09,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:41:09,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:41:09,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:41:09,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:41:09,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:41:09,236 INFO L87 Difference]: Start difference. First operand 2062 states and 2713 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 12:41:09,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:41:09,419 INFO L93 Difference]: Finished difference Result 3882 states and 5094 transitions. [2023-12-02 12:41:09,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:41:09,420 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 112 [2023-12-02 12:41:09,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:41:09,436 INFO L225 Difference]: With dead ends: 3882 [2023-12-02 12:41:09,436 INFO L226 Difference]: Without dead ends: 2510 [2023-12-02 12:41:09,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 114 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 12:41:09,441 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 112 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:41:09,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 147 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:41:09,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2510 states. [2023-12-02 12:41:09,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2510 to 2510. [2023-12-02 12:41:09,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2510 states, 1999 states have (on average 1.2901450725362682) internal successors, (2579), 2013 states have internal predecessors, (2579), 310 states have call successors, (310), 201 states have call predecessors, (310), 200 states have return successors, (308), 296 states have call predecessors, (308), 308 states have call successors, (308) [2023-12-02 12:41:09,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2510 states to 2510 states and 3197 transitions. [2023-12-02 12:41:09,606 INFO L78 Accepts]: Start accepts. Automaton has 2510 states and 3197 transitions. Word has length 112 [2023-12-02 12:41:09,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:41:09,607 INFO L495 AbstractCegarLoop]: Abstraction has 2510 states and 3197 transitions. [2023-12-02 12:41:09,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 12:41:09,607 INFO L276 IsEmpty]: Start isEmpty. Operand 2510 states and 3197 transitions. [2023-12-02 12:41:09,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-12-02 12:41:09,615 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:41:09,616 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:41:09,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 12:41:09,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:41:09,816 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:41:09,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:41:09,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1755425429, now seen corresponding path program 1 times [2023-12-02 12:41:09,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:41:09,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832587812] [2023-12-02 12:41:09,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:09,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:41:09,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:10,021 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-02 12:41:10,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:41:10,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832587812] [2023-12-02 12:41:10,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832587812] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:41:10,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662223214] [2023-12-02 12:41:10,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:10,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:41:10,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:41:10,023 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:41:10,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 12:41:10,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:10,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 12:41:10,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:41:10,179 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 12:41:10,179 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:41:10,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662223214] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:41:10,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:41:10,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 12:41:10,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562004392] [2023-12-02 12:41:10,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:41:10,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:41:10,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:41:10,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:41:10,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:41:10,181 INFO L87 Difference]: Start difference. First operand 2510 states and 3197 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 12:41:10,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:41:10,374 INFO L93 Difference]: Finished difference Result 5918 states and 7616 transitions. [2023-12-02 12:41:10,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:41:10,375 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 113 [2023-12-02 12:41:10,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:41:10,397 INFO L225 Difference]: With dead ends: 5918 [2023-12-02 12:41:10,397 INFO L226 Difference]: Without dead ends: 3414 [2023-12-02 12:41:10,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 115 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 12:41:10,404 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 60 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:41:10,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 220 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:41:10,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3414 states. [2023-12-02 12:41:10,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3414 to 2774. [2023-12-02 12:41:10,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2774 states, 2235 states have (on average 1.3078299776286353) internal successors, (2923), 2250 states have internal predecessors, (2923), 324 states have call successors, (324), 215 states have call predecessors, (324), 214 states have return successors, (322), 309 states have call predecessors, (322), 322 states have call successors, (322) [2023-12-02 12:41:10,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2774 states to 2774 states and 3569 transitions. [2023-12-02 12:41:10,597 INFO L78 Accepts]: Start accepts. Automaton has 2774 states and 3569 transitions. Word has length 113 [2023-12-02 12:41:10,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:41:10,598 INFO L495 AbstractCegarLoop]: Abstraction has 2774 states and 3569 transitions. [2023-12-02 12:41:10,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 12:41:10,598 INFO L276 IsEmpty]: Start isEmpty. Operand 2774 states and 3569 transitions. [2023-12-02 12:41:10,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-12-02 12:41:10,607 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:41:10,607 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:41:10,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 12:41:10,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:41:10,808 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:41:10,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:41:10,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1276333172, now seen corresponding path program 1 times [2023-12-02 12:41:10,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:41:10,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038929508] [2023-12-02 12:41:10,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:10,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:41:10,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:10,903 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-12-02 12:41:10,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:41:10,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038929508] [2023-12-02 12:41:10,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038929508] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:41:10,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488941528] [2023-12-02 12:41:10,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:10,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:41:10,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:41:10,905 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:41:10,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 12:41:11,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:11,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 12:41:11,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:41:11,095 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 12:41:11,096 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:41:11,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488941528] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:41:11,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:41:11,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 12:41:11,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274153476] [2023-12-02 12:41:11,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:41:11,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:41:11,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:41:11,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:41:11,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:41:11,098 INFO L87 Difference]: Start difference. First operand 2774 states and 3569 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 12:41:11,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:41:11,292 INFO L93 Difference]: Finished difference Result 5210 states and 6769 transitions. [2023-12-02 12:41:11,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:41:11,293 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 113 [2023-12-02 12:41:11,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:41:11,309 INFO L225 Difference]: With dead ends: 5210 [2023-12-02 12:41:11,309 INFO L226 Difference]: Without dead ends: 3372 [2023-12-02 12:41:11,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:41:11,314 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 63 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:41:11,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 274 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:41:11,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3372 states. [2023-12-02 12:41:11,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3372 to 3094. [2023-12-02 12:41:11,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3094 states, 2523 states have (on average 1.3297661514070551) internal successors, (3355), 2538 states have internal predecessors, (3355), 340 states have call successors, (340), 231 states have call predecessors, (340), 230 states have return successors, (338), 325 states have call predecessors, (338), 338 states have call successors, (338) [2023-12-02 12:41:11,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3094 states to 3094 states and 4033 transitions. [2023-12-02 12:41:11,481 INFO L78 Accepts]: Start accepts. Automaton has 3094 states and 4033 transitions. Word has length 113 [2023-12-02 12:41:11,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:41:11,481 INFO L495 AbstractCegarLoop]: Abstraction has 3094 states and 4033 transitions. [2023-12-02 12:41:11,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 12:41:11,482 INFO L276 IsEmpty]: Start isEmpty. Operand 3094 states and 4033 transitions. [2023-12-02 12:41:11,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-12-02 12:41:11,488 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:41:11,488 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:41:11,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 12:41:11,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 12:41:11,689 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:41:11,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:41:11,689 INFO L85 PathProgramCache]: Analyzing trace with hash 629026686, now seen corresponding path program 1 times [2023-12-02 12:41:11,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:41:11,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921003821] [2023-12-02 12:41:11,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:11,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:41:11,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:11,833 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 26 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 12:41:11,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:41:11,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921003821] [2023-12-02 12:41:11,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921003821] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:41:11,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935338082] [2023-12-02 12:41:11,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:11,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:41:11,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:41:11,835 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:41:11,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 12:41:11,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:11,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 12:41:11,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:41:12,089 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 12:41:12,089 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:41:12,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935338082] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:41:12,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:41:12,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2023-12-02 12:41:12,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470604008] [2023-12-02 12:41:12,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:41:12,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:41:12,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:41:12,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:41:12,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-12-02 12:41:12,092 INFO L87 Difference]: Start difference. First operand 3094 states and 4033 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 12:41:12,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:41:12,576 INFO L93 Difference]: Finished difference Result 7606 states and 9885 transitions. [2023-12-02 12:41:12,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 12:41:12,577 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 115 [2023-12-02 12:41:12,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:41:12,597 INFO L225 Difference]: With dead ends: 7606 [2023-12-02 12:41:12,597 INFO L226 Difference]: Without dead ends: 4518 [2023-12-02 12:41:12,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-12-02 12:41:12,604 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 286 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:41:12,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 316 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:41:12,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4518 states. [2023-12-02 12:41:12,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4518 to 4514. [2023-12-02 12:41:12,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4514 states, 3673 states have (on average 1.3071059079771303) internal successors, (4801), 3694 states have internal predecessors, (4801), 498 states have call successors, (498), 343 states have call predecessors, (498), 342 states have return successors, (496), 477 states have call predecessors, (496), 496 states have call successors, (496) [2023-12-02 12:41:12,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4514 states to 4514 states and 5795 transitions. [2023-12-02 12:41:12,921 INFO L78 Accepts]: Start accepts. Automaton has 4514 states and 5795 transitions. Word has length 115 [2023-12-02 12:41:12,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:41:12,921 INFO L495 AbstractCegarLoop]: Abstraction has 4514 states and 5795 transitions. [2023-12-02 12:41:12,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 12:41:12,921 INFO L276 IsEmpty]: Start isEmpty. Operand 4514 states and 5795 transitions. [2023-12-02 12:41:12,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-12-02 12:41:12,931 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:41:12,932 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 12:41:12,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 12:41:13,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:41:13,133 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:41:13,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:41:13,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1149997315, now seen corresponding path program 1 times [2023-12-02 12:41:13,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:41:13,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120037641] [2023-12-02 12:41:13,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:13,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:41:13,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:13,254 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-12-02 12:41:13,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:41:13,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120037641] [2023-12-02 12:41:13,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120037641] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:41:13,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826070474] [2023-12-02 12:41:13,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:13,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:41:13,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:41:13,256 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:41:13,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 12:41:13,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:13,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 12:41:13,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:41:13,443 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 12:41:13,443 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:41:13,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826070474] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:41:13,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:41:13,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 12:41:13,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427974338] [2023-12-02 12:41:13,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:41:13,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:41:13,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:41:13,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:41:13,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:41:13,446 INFO L87 Difference]: Start difference. First operand 4514 states and 5795 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 12:41:13,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:41:13,849 INFO L93 Difference]: Finished difference Result 8582 states and 11127 transitions. [2023-12-02 12:41:13,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:41:13,850 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 116 [2023-12-02 12:41:13,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:41:13,881 INFO L225 Difference]: With dead ends: 8582 [2023-12-02 12:41:13,881 INFO L226 Difference]: Without dead ends: 5574 [2023-12-02 12:41:13,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:41:13,889 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 67 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:41:13,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 280 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:41:13,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5574 states. [2023-12-02 12:41:14,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5574 to 5066. [2023-12-02 12:41:14,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5066 states, 4161 states have (on average 1.31915404950733) internal successors, (5489), 4182 states have internal predecessors, (5489), 530 states have call successors, (530), 375 states have call predecessors, (530), 374 states have return successors, (528), 509 states have call predecessors, (528), 528 states have call successors, (528) [2023-12-02 12:41:14,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5066 states to 5066 states and 6547 transitions. [2023-12-02 12:41:14,278 INFO L78 Accepts]: Start accepts. Automaton has 5066 states and 6547 transitions. Word has length 116 [2023-12-02 12:41:14,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:41:14,278 INFO L495 AbstractCegarLoop]: Abstraction has 5066 states and 6547 transitions. [2023-12-02 12:41:14,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 12:41:14,279 INFO L276 IsEmpty]: Start isEmpty. Operand 5066 states and 6547 transitions. [2023-12-02 12:41:14,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-12-02 12:41:14,292 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:41:14,293 INFO L195 NwaCegarLoop]: trace histogram [5, 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] [2023-12-02 12:41:14,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 12:41:14,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 12:41:14,497 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:41:14,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:41:14,497 INFO L85 PathProgramCache]: Analyzing trace with hash 623134976, now seen corresponding path program 1 times [2023-12-02 12:41:14,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:41:14,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994786327] [2023-12-02 12:41:14,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:14,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:41:14,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:14,854 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-12-02 12:41:14,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:41:14,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994786327] [2023-12-02 12:41:14,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994786327] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:41:14,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314505296] [2023-12-02 12:41:14,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:14,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:41:14,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:41:14,856 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:41:14,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 12:41:15,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:15,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 12:41:15,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:41:15,141 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 62 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 12:41:15,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:41:15,566 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-12-02 12:41:15,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314505296] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:41:15,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [694685346] [2023-12-02 12:41:15,589 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2023-12-02 12:41:15,589 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:41:15,593 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:41:15,598 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:41:15,599 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:41:20,206 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 37 for LOIs [2023-12-02 12:41:20,209 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 108 for LOIs [2023-12-02 12:41:20,283 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 116 for LOIs [2023-12-02 12:41:20,362 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 91 for LOIs [2023-12-02 12:41:20,398 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 32 for LOIs [2023-12-02 12:41:20,417 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 52 for LOIs [2023-12-02 12:41:20,492 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 32 for LOIs [2023-12-02 12:41:20,773 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:41:27,723 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '90897#(and (<= 1 |#StackHeapBarrier|) (<= ~local~0 2147483647) (= ~t1_pc~0 0) (= ~t1_i~0 1) (<= 0 (+ ~local~0 2147483648)) (= 0 ~t3_pc~0) (= ~m_pc~0 1) (= ~m_i~0 1) (not (= ~token~0 (+ 3 ~local~0))) (= ~t2_i~0 1) (= 0 ~t2_pc~0) (= ~m_st~0 1) (<= ~token~0 2147483647) (= ~t3_i~0 1) (<= 0 (+ ~token~0 2147483648)))' at error location [2023-12-02 12:41:27,724 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:41:27,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:41:27,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 16 [2023-12-02 12:41:27,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134278893] [2023-12-02 12:41:27,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:41:27,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 12:41:27,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:41:27,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 12:41:27,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=3856, Unknown=0, NotChecked=0, Total=4290 [2023-12-02 12:41:27,729 INFO L87 Difference]: Start difference. First operand 5066 states and 6547 transitions. Second operand has 16 states, 14 states have (on average 10.285714285714286) internal successors, (144), 14 states have internal predecessors, (144), 8 states have call successors, (34), 5 states have call predecessors, (34), 6 states have return successors, (33), 8 states have call predecessors, (33), 8 states have call successors, (33) [2023-12-02 12:41:31,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:41:31,558 INFO L93 Difference]: Finished difference Result 15583 states and 20553 transitions. [2023-12-02 12:41:31,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2023-12-02 12:41:31,559 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 10.285714285714286) internal successors, (144), 14 states have internal predecessors, (144), 8 states have call successors, (34), 5 states have call predecessors, (34), 6 states have return successors, (33), 8 states have call predecessors, (33), 8 states have call successors, (33) Word has length 122 [2023-12-02 12:41:31,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:41:31,601 INFO L225 Difference]: With dead ends: 15583 [2023-12-02 12:41:31,601 INFO L226 Difference]: Without dead ends: 10523 [2023-12-02 12:41:31,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 354 SyntacticMatches, 14 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13467 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=2495, Invalid=28657, Unknown=0, NotChecked=0, Total=31152 [2023-12-02 12:41:31,627 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 1351 mSDsluCounter, 2942 mSDsCounter, 0 mSdLazyCounter, 2151 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1357 SdHoareTripleChecker+Valid, 3334 SdHoareTripleChecker+Invalid, 2501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 2151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:41:31,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1357 Valid, 3334 Invalid, 2501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 2151 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-02 12:41:31,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10523 states. [2023-12-02 12:41:32,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10523 to 7655. [2023-12-02 12:41:32,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7655 states, 6482 states have (on average 1.2903424868867635) internal successors, (8364), 6509 states have internal predecessors, (8364), 635 states have call successors, (635), 538 states have call predecessors, (635), 537 states have return successors, (633), 608 states have call predecessors, (633), 633 states have call successors, (633) [2023-12-02 12:41:32,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7655 states to 7655 states and 9632 transitions. [2023-12-02 12:41:32,272 INFO L78 Accepts]: Start accepts. Automaton has 7655 states and 9632 transitions. Word has length 122 [2023-12-02 12:41:32,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:41:32,272 INFO L495 AbstractCegarLoop]: Abstraction has 7655 states and 9632 transitions. [2023-12-02 12:41:32,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 10.285714285714286) internal successors, (144), 14 states have internal predecessors, (144), 8 states have call successors, (34), 5 states have call predecessors, (34), 6 states have return successors, (33), 8 states have call predecessors, (33), 8 states have call successors, (33) [2023-12-02 12:41:32,273 INFO L276 IsEmpty]: Start isEmpty. Operand 7655 states and 9632 transitions. [2023-12-02 12:41:32,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-12-02 12:41:32,289 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:41:32,290 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:41:32,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-02 12:41:32,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 12:41:32,490 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:41:32,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:41:32,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1018324235, now seen corresponding path program 1 times [2023-12-02 12:41:32,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:41:32,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165018978] [2023-12-02 12:41:32,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:32,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:41:32,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:32,581 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-12-02 12:41:32,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:41:32,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165018978] [2023-12-02 12:41:32,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165018978] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:41:32,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194829742] [2023-12-02 12:41:32,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:32,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:41:32,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:41:32,584 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:41:32,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 12:41:32,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:32,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 12:41:32,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:41:32,738 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 12:41:32,738 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:41:32,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194829742] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:41:32,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:41:32,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 12:41:32,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638109945] [2023-12-02 12:41:32,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:41:32,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:41:32,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:41:32,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:41:32,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:41:32,740 INFO L87 Difference]: Start difference. First operand 7655 states and 9632 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 12:41:33,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:41:33,331 INFO L93 Difference]: Finished difference Result 14086 states and 17853 transitions. [2023-12-02 12:41:33,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:41:33,332 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 121 [2023-12-02 12:41:33,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:41:33,357 INFO L225 Difference]: With dead ends: 14086 [2023-12-02 12:41:33,357 INFO L226 Difference]: Without dead ends: 8664 [2023-12-02 12:41:33,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:41:33,370 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 73 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:41:33,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 290 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:41:33,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8664 states. [2023-12-02 12:41:33,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8664 to 8094. [2023-12-02 12:41:33,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8094 states, 6838 states have (on average 1.28487861947938) internal successors, (8786), 6861 states have internal predecessors, (8786), 676 states have call successors, (676), 580 states have call predecessors, (676), 579 states have return successors, (674), 653 states have call predecessors, (674), 674 states have call successors, (674) [2023-12-02 12:41:33,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8094 states to 8094 states and 10136 transitions. [2023-12-02 12:41:33,897 INFO L78 Accepts]: Start accepts. Automaton has 8094 states and 10136 transitions. Word has length 121 [2023-12-02 12:41:33,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:41:33,897 INFO L495 AbstractCegarLoop]: Abstraction has 8094 states and 10136 transitions. [2023-12-02 12:41:33,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 12:41:33,897 INFO L276 IsEmpty]: Start isEmpty. Operand 8094 states and 10136 transitions. [2023-12-02 12:41:33,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-02 12:41:33,905 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:41:33,906 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:41:33,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 12:41:34,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:41:34,106 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:41:34,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:41:34,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1601926026, now seen corresponding path program 1 times [2023-12-02 12:41:34,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:41:34,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757096944] [2023-12-02 12:41:34,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:34,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:41:34,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:34,228 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-02 12:41:34,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:41:34,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757096944] [2023-12-02 12:41:34,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757096944] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:41:34,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333152496] [2023-12-02 12:41:34,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:34,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:41:34,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:41:34,230 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:41:34,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 12:41:34,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:34,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 12:41:34,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:41:34,394 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 12:41:34,395 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:41:34,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333152496] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:41:34,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:41:34,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-12-02 12:41:34,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256727385] [2023-12-02 12:41:34,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:41:34,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:41:34,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:41:34,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:41:34,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 12:41:34,397 INFO L87 Difference]: Start difference. First operand 8094 states and 10136 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 12:41:34,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:41:34,910 INFO L93 Difference]: Finished difference Result 11986 states and 15053 transitions. [2023-12-02 12:41:34,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 12:41:34,910 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 123 [2023-12-02 12:41:34,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:41:34,933 INFO L225 Difference]: With dead ends: 11986 [2023-12-02 12:41:34,933 INFO L226 Difference]: Without dead ends: 8385 [2023-12-02 12:41:34,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:41:34,943 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 76 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:41:34,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 431 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:41:34,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8385 states. [2023-12-02 12:41:35,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8385 to 8298. [2023-12-02 12:41:35,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8298 states, 7006 states have (on average 1.2848986582928918) internal successors, (9002), 7047 states have internal predecessors, (9002), 676 states have call successors, (676), 580 states have call predecessors, (676), 615 states have return successors, (710), 671 states have call predecessors, (710), 674 states have call successors, (710) [2023-12-02 12:41:35,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8298 states to 8298 states and 10388 transitions. [2023-12-02 12:41:35,579 INFO L78 Accepts]: Start accepts. Automaton has 8298 states and 10388 transitions. Word has length 123 [2023-12-02 12:41:35,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:41:35,580 INFO L495 AbstractCegarLoop]: Abstraction has 8298 states and 10388 transitions. [2023-12-02 12:41:35,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 12:41:35,580 INFO L276 IsEmpty]: Start isEmpty. Operand 8298 states and 10388 transitions. [2023-12-02 12:41:35,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-12-02 12:41:35,590 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:41:35,590 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:41:35,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 12:41:35,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:41:35,790 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:41:35,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:41:35,791 INFO L85 PathProgramCache]: Analyzing trace with hash 698587941, now seen corresponding path program 1 times [2023-12-02 12:41:35,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:41:35,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555171673] [2023-12-02 12:41:35,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:35,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:41:35,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:35,861 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 31 proven. 11 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-02 12:41:35,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:41:35,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555171673] [2023-12-02 12:41:35,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555171673] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:41:35,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575375667] [2023-12-02 12:41:35,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:35,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:41:35,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:41:35,863 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:41:35,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 12:41:35,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:36,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 12:41:36,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:41:36,020 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-02 12:41:36,020 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:41:36,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575375667] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:41:36,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:41:36,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-12-02 12:41:36,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043662001] [2023-12-02 12:41:36,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:41:36,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:41:36,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:41:36,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:41:36,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:41:36,022 INFO L87 Difference]: Start difference. First operand 8298 states and 10388 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 12:41:36,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:41:36,436 INFO L93 Difference]: Finished difference Result 11956 states and 15073 transitions. [2023-12-02 12:41:36,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:41:36,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 124 [2023-12-02 12:41:36,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:41:36,459 INFO L225 Difference]: With dead ends: 11956 [2023-12-02 12:41:36,460 INFO L226 Difference]: Without dead ends: 8031 [2023-12-02 12:41:36,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 125 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 12:41:36,471 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 22 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:41:36,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 232 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:41:36,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8031 states. [2023-12-02 12:41:36,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8031 to 7593. [2023-12-02 12:41:36,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7593 states, 6409 states have (on average 1.2838196286472148) internal successors, (8228), 6423 states have internal predecessors, (8228), 640 states have call successors, (640), 544 states have call predecessors, (640), 543 states have return successors, (638), 626 states have call predecessors, (638), 638 states have call successors, (638) [2023-12-02 12:41:37,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7593 states to 7593 states and 9506 transitions. [2023-12-02 12:41:37,009 INFO L78 Accepts]: Start accepts. Automaton has 7593 states and 9506 transitions. Word has length 124 [2023-12-02 12:41:37,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:41:37,009 INFO L495 AbstractCegarLoop]: Abstraction has 7593 states and 9506 transitions. [2023-12-02 12:41:37,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 12:41:37,009 INFO L276 IsEmpty]: Start isEmpty. Operand 7593 states and 9506 transitions. [2023-12-02 12:41:37,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-12-02 12:41:37,017 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:41:37,017 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 12:41:37,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 12:41:37,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:41:37,218 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:41:37,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:41:37,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1239958832, now seen corresponding path program 1 times [2023-12-02 12:41:37,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:41:37,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336407287] [2023-12-02 12:41:37,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:37,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:41:37,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:37,355 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 32 proven. 14 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 12:41:37,356 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:41:37,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336407287] [2023-12-02 12:41:37,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336407287] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:41:37,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70627469] [2023-12-02 12:41:37,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:37,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:41:37,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:41:37,357 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:41:37,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 12:41:37,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:37,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 12:41:37,495 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:41:37,546 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 12:41:37,547 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:41:37,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70627469] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:41:37,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:41:37,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2023-12-02 12:41:37,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184335991] [2023-12-02 12:41:37,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:41:37,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:41:37,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:41:37,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:41:37,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:41:37,549 INFO L87 Difference]: Start difference. First operand 7593 states and 9506 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 12:41:37,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:41:37,967 INFO L93 Difference]: Finished difference Result 13427 states and 16924 transitions. [2023-12-02 12:41:37,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:41:37,967 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 125 [2023-12-02 12:41:37,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:41:37,990 INFO L225 Difference]: With dead ends: 13427 [2023-12-02 12:41:37,990 INFO L226 Difference]: Without dead ends: 8093 [2023-12-02 12:41:38,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 127 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 12:41:38,003 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 83 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:41:38,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 161 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:41:38,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8093 states. [2023-12-02 12:41:38,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8093 to 8030. [2023-12-02 12:41:38,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8030 states, 6800 states have (on average 1.2726470588235295) internal successors, (8654), 6814 states have internal predecessors, (8654), 651 states have call successors, (651), 579 states have call predecessors, (651), 578 states have return successors, (679), 637 states have call predecessors, (679), 649 states have call successors, (679) [2023-12-02 12:41:38,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8030 states to 8030 states and 9984 transitions. [2023-12-02 12:41:38,609 INFO L78 Accepts]: Start accepts. Automaton has 8030 states and 9984 transitions. Word has length 125 [2023-12-02 12:41:38,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:41:38,610 INFO L495 AbstractCegarLoop]: Abstraction has 8030 states and 9984 transitions. [2023-12-02 12:41:38,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 12:41:38,610 INFO L276 IsEmpty]: Start isEmpty. Operand 8030 states and 9984 transitions. [2023-12-02 12:41:38,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-12-02 12:41:38,621 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:41:38,621 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 12:41:38,627 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 12:41:38,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 12:41:38,822 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:41:38,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:41:38,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1345594930, now seen corresponding path program 1 times [2023-12-02 12:41:38,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:41:38,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217598680] [2023-12-02 12:41:38,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:38,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:41:38,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:38,872 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 34 proven. 5 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 12:41:38,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:41:38,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217598680] [2023-12-02 12:41:38,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217598680] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:41:38,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682801707] [2023-12-02 12:41:38,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:38,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:41:38,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:41:38,874 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:41:38,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 12:41:39,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:39,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 12:41:39,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:41:39,036 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 12:41:39,036 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:41:39,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682801707] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:41:39,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:41:39,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-12-02 12:41:39,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948382544] [2023-12-02 12:41:39,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:41:39,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:41:39,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:41:39,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:41:39,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:41:39,038 INFO L87 Difference]: Start difference. First operand 8030 states and 9984 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 12:41:39,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:41:39,525 INFO L93 Difference]: Finished difference Result 13685 states and 17203 transitions. [2023-12-02 12:41:39,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:41:39,526 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 125 [2023-12-02 12:41:39,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:41:39,541 INFO L225 Difference]: With dead ends: 13685 [2023-12-02 12:41:39,542 INFO L226 Difference]: Without dead ends: 8029 [2023-12-02 12:41:39,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 126 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 12:41:39,551 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 97 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:41:39,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 308 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:41:39,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8029 states. [2023-12-02 12:41:40,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8029 to 7897. [2023-12-02 12:41:40,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7897 states, 6667 states have (on average 1.2455377231138443) internal successors, (8304), 6681 states have internal predecessors, (8304), 651 states have call successors, (651), 579 states have call predecessors, (651), 578 states have return successors, (679), 637 states have call predecessors, (679), 649 states have call successors, (679) [2023-12-02 12:41:40,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7897 states to 7897 states and 9634 transitions. [2023-12-02 12:41:40,074 INFO L78 Accepts]: Start accepts. Automaton has 7897 states and 9634 transitions. Word has length 125 [2023-12-02 12:41:40,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:41:40,075 INFO L495 AbstractCegarLoop]: Abstraction has 7897 states and 9634 transitions. [2023-12-02 12:41:40,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 12:41:40,075 INFO L276 IsEmpty]: Start isEmpty. Operand 7897 states and 9634 transitions. [2023-12-02 12:41:40,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-12-02 12:41:40,082 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:41:40,082 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 12:41:40,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 12:41:40,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 12:41:40,283 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:41:40,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:41:40,283 INFO L85 PathProgramCache]: Analyzing trace with hash -2072098886, now seen corresponding path program 1 times [2023-12-02 12:41:40,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:41:40,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972212332] [2023-12-02 12:41:40,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:40,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:41:40,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:40,469 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-02 12:41:40,469 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:41:40,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972212332] [2023-12-02 12:41:40,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972212332] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:41:40,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807539054] [2023-12-02 12:41:40,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:40,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:41:40,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:41:40,471 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:41:40,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 12:41:40,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:40,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 12:41:40,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:41:40,653 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:41:40,653 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:41:40,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807539054] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:41:40,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:41:40,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2023-12-02 12:41:40,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152475262] [2023-12-02 12:41:40,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:41:40,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:41:40,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:41:40,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:41:40,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:41:40,655 INFO L87 Difference]: Start difference. First operand 7897 states and 9634 transitions. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-12-02 12:41:41,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:41:41,385 INFO L93 Difference]: Finished difference Result 14828 states and 18179 transitions. [2023-12-02 12:41:41,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 12:41:41,385 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 127 [2023-12-02 12:41:41,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:41:41,405 INFO L225 Difference]: With dead ends: 14828 [2023-12-02 12:41:41,405 INFO L226 Difference]: Without dead ends: 9563 [2023-12-02 12:41:41,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-12-02 12:41:41,416 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 208 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:41:41,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 504 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:41:41,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9563 states. [2023-12-02 12:41:42,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9563 to 8496. [2023-12-02 12:41:42,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8496 states, 7132 states have (on average 1.2389231632080764) internal successors, (8836), 7148 states have internal predecessors, (8836), 732 states have call successors, (732), 640 states have call predecessors, (732), 631 states have return successors, (780), 708 states have call predecessors, (780), 730 states have call successors, (780) [2023-12-02 12:41:42,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8496 states to 8496 states and 10348 transitions. [2023-12-02 12:41:42,205 INFO L78 Accepts]: Start accepts. Automaton has 8496 states and 10348 transitions. Word has length 127 [2023-12-02 12:41:42,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:41:42,205 INFO L495 AbstractCegarLoop]: Abstraction has 8496 states and 10348 transitions. [2023-12-02 12:41:42,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-12-02 12:41:42,205 INFO L276 IsEmpty]: Start isEmpty. Operand 8496 states and 10348 transitions. [2023-12-02 12:41:42,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-12-02 12:41:42,212 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:41:42,212 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 12:41:42,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-02 12:41:42,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:41:42,412 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:41:42,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:41:42,413 INFO L85 PathProgramCache]: Analyzing trace with hash -969616539, now seen corresponding path program 1 times [2023-12-02 12:41:42,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:41:42,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639677659] [2023-12-02 12:41:42,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:42,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:41:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:42,829 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 12:41:42,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:41:42,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639677659] [2023-12-02 12:41:42,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639677659] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:41:42,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:41:42,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-02 12:41:42,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391456457] [2023-12-02 12:41:42,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:41:42,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 12:41:42,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:41:42,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 12:41:42,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-12-02 12:41:42,831 INFO L87 Difference]: Start difference. First operand 8496 states and 10348 transitions. Second operand has 11 states, 7 states have (on average 10.714285714285714) internal successors, (75), 8 states have internal predecessors, (75), 6 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2023-12-02 12:41:44,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:41:44,878 INFO L93 Difference]: Finished difference Result 26653 states and 33607 transitions. [2023-12-02 12:41:44,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 12:41:44,879 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 10.714285714285714) internal successors, (75), 8 states have internal predecessors, (75), 6 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 122 [2023-12-02 12:41:44,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:41:44,919 INFO L225 Difference]: With dead ends: 26653 [2023-12-02 12:41:44,919 INFO L226 Difference]: Without dead ends: 22195 [2023-12-02 12:41:44,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2023-12-02 12:41:44,931 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 709 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 12:41:44,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [724 Valid, 438 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 12:41:44,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22195 states. [2023-12-02 12:41:46,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22195 to 16717. [2023-12-02 12:41:46,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16717 states, 14068 states have (on average 1.2337219220926927) internal successors, (17356), 14109 states have internal predecessors, (17356), 1387 states have call successors, (1387), 1251 states have call predecessors, (1387), 1261 states have return successors, (1492), 1357 states have call predecessors, (1492), 1385 states have call successors, (1492) [2023-12-02 12:41:46,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16717 states to 16717 states and 20235 transitions. [2023-12-02 12:41:46,430 INFO L78 Accepts]: Start accepts. Automaton has 16717 states and 20235 transitions. Word has length 122 [2023-12-02 12:41:46,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:41:46,430 INFO L495 AbstractCegarLoop]: Abstraction has 16717 states and 20235 transitions. [2023-12-02 12:41:46,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 10.714285714285714) internal successors, (75), 8 states have internal predecessors, (75), 6 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2023-12-02 12:41:46,430 INFO L276 IsEmpty]: Start isEmpty. Operand 16717 states and 20235 transitions. [2023-12-02 12:41:46,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-02 12:41:46,436 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:41:46,437 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:41:46,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-12-02 12:41:46,437 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:41:46,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:41:46,437 INFO L85 PathProgramCache]: Analyzing trace with hash -110627475, now seen corresponding path program 1 times [2023-12-02 12:41:46,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:41:46,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412969967] [2023-12-02 12:41:46,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:46,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:41:46,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:46,622 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-02 12:41:46,622 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:41:46,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412969967] [2023-12-02 12:41:46,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412969967] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:41:46,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:41:46,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 12:41:46,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076340154] [2023-12-02 12:41:46,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:41:46,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 12:41:46,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:41:46,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 12:41:46,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 12:41:46,624 INFO L87 Difference]: Start difference. First operand 16717 states and 20235 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 12:41:47,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:41:47,950 INFO L93 Difference]: Finished difference Result 25873 states and 31310 transitions. [2023-12-02 12:41:47,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 12:41:47,951 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 123 [2023-12-02 12:41:47,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:41:47,979 INFO L225 Difference]: With dead ends: 25873 [2023-12-02 12:41:47,979 INFO L226 Difference]: Without dead ends: 17118 [2023-12-02 12:41:47,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:41:47,989 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 85 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:41:47,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 391 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:41:48,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17118 states. [2023-12-02 12:41:49,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17118 to 16239. [2023-12-02 12:41:49,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16239 states, 13538 states have (on average 1.2207120697296499) internal successors, (16526), 13586 states have internal predecessors, (16526), 1431 states have call successors, (1431), 1259 states have call predecessors, (1431), 1269 states have return successors, (1577), 1394 states have call predecessors, (1577), 1429 states have call successors, (1577) [2023-12-02 12:41:49,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16239 states to 16239 states and 19534 transitions. [2023-12-02 12:41:49,237 INFO L78 Accepts]: Start accepts. Automaton has 16239 states and 19534 transitions. Word has length 123 [2023-12-02 12:41:49,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:41:49,237 INFO L495 AbstractCegarLoop]: Abstraction has 16239 states and 19534 transitions. [2023-12-02 12:41:49,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 12:41:49,237 INFO L276 IsEmpty]: Start isEmpty. Operand 16239 states and 19534 transitions. [2023-12-02 12:41:49,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-12-02 12:41:49,248 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:41:49,248 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:41:49,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-12-02 12:41:49,249 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:41:49,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:41:49,249 INFO L85 PathProgramCache]: Analyzing trace with hash 663087428, now seen corresponding path program 1 times [2023-12-02 12:41:49,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:41:49,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524900051] [2023-12-02 12:41:49,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:49,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:41:49,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:49,405 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 34 proven. 20 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-12-02 12:41:49,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:41:49,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524900051] [2023-12-02 12:41:49,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524900051] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:41:49,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604032181] [2023-12-02 12:41:49,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:49,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:41:49,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:41:49,407 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:41:49,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-02 12:41:49,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:49,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 12:41:49,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:41:49,615 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 12:41:49,615 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:41:49,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604032181] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:41:49,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:41:49,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2023-12-02 12:41:49,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894324757] [2023-12-02 12:41:49,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:41:49,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:41:49,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:41:49,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:41:49,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:41:49,617 INFO L87 Difference]: Start difference. First operand 16239 states and 19534 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 12:41:51,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:41:51,091 INFO L93 Difference]: Finished difference Result 29205 states and 35442 transitions. [2023-12-02 12:41:51,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:41:51,092 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 149 [2023-12-02 12:41:51,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:41:51,119 INFO L225 Difference]: With dead ends: 29205 [2023-12-02 12:41:51,119 INFO L226 Difference]: Without dead ends: 17605 [2023-12-02 12:41:51,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 151 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 12:41:51,133 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 84 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:41:51,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 161 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:41:51,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17605 states. [2023-12-02 12:41:52,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17605 to 17203. [2023-12-02 12:41:52,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17203 states, 14430 states have (on average 1.2050589050589051) internal successors, (17389), 14491 states have internal predecessors, (17389), 1431 states have call successors, (1431), 1303 states have call predecessors, (1431), 1341 states have return successors, (1660), 1409 states have call predecessors, (1660), 1429 states have call successors, (1660) [2023-12-02 12:41:52,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17203 states to 17203 states and 20480 transitions. [2023-12-02 12:41:52,406 INFO L78 Accepts]: Start accepts. Automaton has 17203 states and 20480 transitions. Word has length 149 [2023-12-02 12:41:52,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:41:52,406 INFO L495 AbstractCegarLoop]: Abstraction has 17203 states and 20480 transitions. [2023-12-02 12:41:52,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 12:41:52,407 INFO L276 IsEmpty]: Start isEmpty. Operand 17203 states and 20480 transitions. [2023-12-02 12:41:52,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-12-02 12:41:52,418 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:41:52,418 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:41:52,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-02 12:41:52,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-12-02 12:41:52,619 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:41:52,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:41:52,619 INFO L85 PathProgramCache]: Analyzing trace with hash 661024613, now seen corresponding path program 1 times [2023-12-02 12:41:52,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:41:52,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454140260] [2023-12-02 12:41:52,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:52,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:41:52,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:52,661 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 39 proven. 17 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-12-02 12:41:52,661 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:41:52,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454140260] [2023-12-02 12:41:52,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454140260] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:41:52,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525473493] [2023-12-02 12:41:52,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:52,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:41:52,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:41:52,662 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:41:52,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-02 12:41:52,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:52,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 12:41:52,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:41:52,803 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-02 12:41:52,804 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:41:52,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525473493] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:41:52,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:41:52,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2023-12-02 12:41:52,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035252734] [2023-12-02 12:41:52,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:41:52,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:41:52,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:41:52,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:41:52,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:41:52,805 INFO L87 Difference]: Start difference. First operand 17203 states and 20480 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-12-02 12:41:54,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:41:54,009 INFO L93 Difference]: Finished difference Result 29563 states and 35761 transitions. [2023-12-02 12:41:54,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:41:54,010 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 149 [2023-12-02 12:41:54,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:41:54,034 INFO L225 Difference]: With dead ends: 29563 [2023-12-02 12:41:54,034 INFO L226 Difference]: Without dead ends: 17195 [2023-12-02 12:41:54,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 150 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 12:41:54,047 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 95 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:41:54,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 291 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:41:54,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17195 states. [2023-12-02 12:41:55,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17195 to 16985. [2023-12-02 12:41:55,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16985 states, 14212 states have (on average 1.1740782437376864) internal successors, (16686), 14273 states have internal predecessors, (16686), 1431 states have call successors, (1431), 1303 states have call predecessors, (1431), 1341 states have return successors, (1660), 1409 states have call predecessors, (1660), 1429 states have call successors, (1660) [2023-12-02 12:41:55,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16985 states to 16985 states and 19777 transitions. [2023-12-02 12:41:55,268 INFO L78 Accepts]: Start accepts. Automaton has 16985 states and 19777 transitions. Word has length 149 [2023-12-02 12:41:55,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:41:55,268 INFO L495 AbstractCegarLoop]: Abstraction has 16985 states and 19777 transitions. [2023-12-02 12:41:55,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-12-02 12:41:55,268 INFO L276 IsEmpty]: Start isEmpty. Operand 16985 states and 19777 transitions. [2023-12-02 12:41:55,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-12-02 12:41:55,279 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:41:55,279 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:41:55,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-02 12:41:55,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-12-02 12:41:55,480 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:41:55,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:41:55,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1431609372, now seen corresponding path program 1 times [2023-12-02 12:41:55,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:41:55,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810308733] [2023-12-02 12:41:55,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:55,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:41:55,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:55,662 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 47 proven. 36 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-02 12:41:55,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:41:55,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810308733] [2023-12-02 12:41:55,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810308733] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:41:55,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813198517] [2023-12-02 12:41:55,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:55,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:41:55,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:41:55,664 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:41:55,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-02 12:41:55,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:55,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 12:41:55,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:41:55,827 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 12:41:55,827 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:41:55,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813198517] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:41:55,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:41:55,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2023-12-02 12:41:55,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181823063] [2023-12-02 12:41:55,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:41:55,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:41:55,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:41:55,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:41:55,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:41:55,829 INFO L87 Difference]: Start difference. First operand 16985 states and 19777 transitions. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 5 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-12-02 12:41:57,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:41:57,636 INFO L93 Difference]: Finished difference Result 31838 states and 37246 transitions. [2023-12-02 12:41:57,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 12:41:57,637 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 5 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 152 [2023-12-02 12:41:57,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:41:57,665 INFO L225 Difference]: With dead ends: 31838 [2023-12-02 12:41:57,665 INFO L226 Difference]: Without dead ends: 20230 [2023-12-02 12:41:57,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-12-02 12:41:57,684 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 230 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:41:57,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 386 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:41:57,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20230 states. [2023-12-02 12:41:59,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20230 to 18248. [2023-12-02 12:41:59,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18248 states, 15164 states have (on average 1.1643365866525983) internal successors, (17656), 15247 states have internal predecessors, (17656), 1607 states have call successors, (1607), 1439 states have call predecessors, (1607), 1476 states have return successors, (1963), 1562 states have call predecessors, (1963), 1605 states have call successors, (1963) [2023-12-02 12:41:59,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18248 states to 18248 states and 21226 transitions. [2023-12-02 12:41:59,096 INFO L78 Accepts]: Start accepts. Automaton has 18248 states and 21226 transitions. Word has length 152 [2023-12-02 12:41:59,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:41:59,097 INFO L495 AbstractCegarLoop]: Abstraction has 18248 states and 21226 transitions. [2023-12-02 12:41:59,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 5 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2023-12-02 12:41:59,097 INFO L276 IsEmpty]: Start isEmpty. Operand 18248 states and 21226 transitions. [2023-12-02 12:41:59,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-12-02 12:41:59,115 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:41:59,115 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:41:59,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-02 12:41:59,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-12-02 12:41:59,316 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:41:59,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:41:59,316 INFO L85 PathProgramCache]: Analyzing trace with hash 864829316, now seen corresponding path program 1 times [2023-12-02 12:41:59,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:41:59,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908301783] [2023-12-02 12:41:59,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:59,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:41:59,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:59,494 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 35 proven. 38 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-12-02 12:41:59,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:41:59,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908301783] [2023-12-02 12:41:59,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908301783] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:41:59,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153658326] [2023-12-02 12:41:59,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:59,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:41:59,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:41:59,495 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:41:59,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-02 12:41:59,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:59,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 12:41:59,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:41:59,797 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 113 proven. 14 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 12:41:59,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:42:00,100 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 35 proven. 4 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-12-02 12:42:00,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153658326] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:42:00,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1290706814] [2023-12-02 12:42:00,104 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2023-12-02 12:42:00,104 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:42:00,105 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:42:00,105 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:42:00,105 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:42:08,378 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 12 for LOIs [2023-12-02 12:42:08,379 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 1 for LOIs [2023-12-02 12:42:08,385 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 102 for LOIs [2023-12-02 12:42:08,429 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 1 for LOIs [2023-12-02 12:42:08,429 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 1 for LOIs [2023-12-02 12:42:08,435 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 62 for LOIs [2023-12-02 12:42:08,612 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 1 for LOIs [2023-12-02 12:42:08,663 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:42:13,074 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '559762#(and (= ~m_pc~0 1) (not (= ~token~0 (+ 3 ~local~0))) (= ~m_st~0 1))' at error location [2023-12-02 12:42:13,074 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:42:13,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:42:13,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 6] total 17 [2023-12-02 12:42:13,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19938117] [2023-12-02 12:42:13,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:42:13,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 12:42:13,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:42:13,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 12:42:13,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=5684, Unknown=0, NotChecked=0, Total=6006 [2023-12-02 12:42:13,078 INFO L87 Difference]: Start difference. First operand 18248 states and 21226 transitions. Second operand has 17 states, 14 states have (on average 12.071428571428571) internal successors, (169), 15 states have internal predecessors, (169), 7 states have call successors, (34), 4 states have call predecessors, (34), 7 states have return successors, (33), 6 states have call predecessors, (33), 7 states have call successors, (33) [2023-12-02 12:42:19,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:42:19,547 INFO L93 Difference]: Finished difference Result 39309 states and 47358 transitions. [2023-12-02 12:42:19,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2023-12-02 12:42:19,548 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 12.071428571428571) internal successors, (169), 15 states have internal predecessors, (169), 7 states have call successors, (34), 4 states have call predecessors, (34), 7 states have return successors, (33), 6 states have call predecessors, (33), 7 states have call successors, (33) Word has length 168 [2023-12-02 12:42:19,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:42:19,582 INFO L225 Difference]: With dead ends: 39309 [2023-12-02 12:42:19,582 INFO L226 Difference]: Without dead ends: 21845 [2023-12-02 12:42:19,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 671 GetRequests, 483 SyntacticMatches, 4 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13042 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=2146, Invalid=32264, Unknown=0, NotChecked=0, Total=34410 [2023-12-02 12:42:19,606 INFO L413 NwaCegarLoop]: 617 mSDtfsCounter, 1793 mSDsluCounter, 4725 mSDsCounter, 0 mSdLazyCounter, 2687 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1802 SdHoareTripleChecker+Valid, 5342 SdHoareTripleChecker+Invalid, 2993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 2687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:42:19,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1802 Valid, 5342 Invalid, 2993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 2687 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-02 12:42:19,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21845 states. [2023-12-02 12:42:20,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21845 to 13373. [2023-12-02 12:42:20,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13373 states, 11153 states have (on average 1.156818793149825) internal successors, (12902), 11208 states have internal predecessors, (12902), 1137 states have call successors, (1137), 1049 states have call predecessors, (1137), 1082 states have return successors, (1421), 1116 states have call predecessors, (1421), 1135 states have call successors, (1421) [2023-12-02 12:42:20,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13373 states to 13373 states and 15460 transitions. [2023-12-02 12:42:20,823 INFO L78 Accepts]: Start accepts. Automaton has 13373 states and 15460 transitions. Word has length 168 [2023-12-02 12:42:20,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:42:20,823 INFO L495 AbstractCegarLoop]: Abstraction has 13373 states and 15460 transitions. [2023-12-02 12:42:20,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 12.071428571428571) internal successors, (169), 15 states have internal predecessors, (169), 7 states have call successors, (34), 4 states have call predecessors, (34), 7 states have return successors, (33), 6 states have call predecessors, (33), 7 states have call successors, (33) [2023-12-02 12:42:20,823 INFO L276 IsEmpty]: Start isEmpty. Operand 13373 states and 15460 transitions. [2023-12-02 12:42:20,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-12-02 12:42:20,839 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:42:20,839 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:42:20,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-12-02 12:42:21,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:42:21,040 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:42:21,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:42:21,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1365496966, now seen corresponding path program 1 times [2023-12-02 12:42:21,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:42:21,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921131403] [2023-12-02 12:42:21,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:42:21,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:42:21,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:42:21,690 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 37 proven. 53 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-12-02 12:42:21,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:42:21,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921131403] [2023-12-02 12:42:21,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921131403] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:42:21,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836218581] [2023-12-02 12:42:21,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:42:21,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:42:21,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:42:21,691 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:42:21,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-02 12:42:21,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:42:21,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 12:42:21,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:42:21,878 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-12-02 12:42:21,878 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:42:21,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836218581] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:42:21,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:42:21,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2023-12-02 12:42:21,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273199867] [2023-12-02 12:42:21,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:42:21,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:42:21,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:42:21,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:42:21,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2023-12-02 12:42:21,880 INFO L87 Difference]: Start difference. First operand 13373 states and 15460 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-12-02 12:42:22,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:42:22,917 INFO L93 Difference]: Finished difference Result 24080 states and 27753 transitions. [2023-12-02 12:42:22,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 12:42:22,918 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 169 [2023-12-02 12:42:22,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:42:22,933 INFO L225 Difference]: With dead ends: 24080 [2023-12-02 12:42:22,933 INFO L226 Difference]: Without dead ends: 12079 [2023-12-02 12:42:22,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2023-12-02 12:42:22,945 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 91 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:42:22,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 453 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:42:22,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12079 states. [2023-12-02 12:42:23,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12079 to 11715. [2023-12-02 12:42:23,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11715 states, 9754 states have (on average 1.1403526758253024) internal successors, (11123), 9842 states have internal predecessors, (11123), 991 states have call successors, (991), 903 states have call predecessors, (991), 969 states have return successors, (1265), 970 states have call predecessors, (1265), 989 states have call successors, (1265) [2023-12-02 12:42:23,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11715 states to 11715 states and 13379 transitions. [2023-12-02 12:42:23,849 INFO L78 Accepts]: Start accepts. Automaton has 11715 states and 13379 transitions. Word has length 169 [2023-12-02 12:42:23,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:42:23,849 INFO L495 AbstractCegarLoop]: Abstraction has 11715 states and 13379 transitions. [2023-12-02 12:42:23,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-12-02 12:42:23,850 INFO L276 IsEmpty]: Start isEmpty. Operand 11715 states and 13379 transitions. [2023-12-02 12:42:23,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-12-02 12:42:23,858 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:42:23,859 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:42:23,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-12-02 12:42:24,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:42:24,059 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:42:24,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:42:24,059 INFO L85 PathProgramCache]: Analyzing trace with hash 401038280, now seen corresponding path program 1 times [2023-12-02 12:42:24,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:42:24,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643694175] [2023-12-02 12:42:24,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:42:24,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:42:24,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:42:24,675 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 38 proven. 55 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-12-02 12:42:24,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:42:24,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643694175] [2023-12-02 12:42:24,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643694175] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:42:24,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089875749] [2023-12-02 12:42:24,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:42:24,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:42:24,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:42:24,676 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:42:24,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-02 12:42:24,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:42:24,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-02 12:42:24,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:42:25,087 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 123 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-02 12:42:25,088 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:42:25,606 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 45 proven. 17 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-12-02 12:42:25,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089875749] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:42:25,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1331141679] [2023-12-02 12:42:25,610 INFO L159 IcfgInterpreter]: Started Sifa with 84 locations of interest [2023-12-02 12:42:25,610 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:42:25,611 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:42:25,611 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:42:25,611 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:44:13,877 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 25 for LOIs [2023-12-02 12:44:13,879 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 1 for LOIs [2023-12-02 12:44:13,883 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 102 for LOIs [2023-12-02 12:44:13,927 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 1 for LOIs [2023-12-02 12:44:13,928 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 1 for LOIs [2023-12-02 12:44:13,934 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 59 for LOIs [2023-12-02 12:44:14,149 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 1 for LOIs [2023-12-02 12:44:14,195 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:44:18,972 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '669290#(and (exists ((|v_ULTIMATE.start_eval_~tmp_ndt_1~0#1_BEFORE_CALL_29| Int)) (and (<= 0 (+ 2147483648 |v_ULTIMATE.start_eval_~tmp_ndt_1~0#1_BEFORE_CALL_29|)) (<= |v_ULTIMATE.start_eval_~tmp_ndt_1~0#1_BEFORE_CALL_29| 2147483647) (not (= |v_ULTIMATE.start_eval_~tmp_ndt_1~0#1_BEFORE_CALL_29| 0)))) (= ~m_pc~0 1) (not (= ~token~0 (+ 3 ~local~0))) (= ~m_st~0 1) (<= 0 ~t3_pc~0))' at error location [2023-12-02 12:44:18,973 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:44:18,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:44:18,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 12] total 32 [2023-12-02 12:44:18,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813992496] [2023-12-02 12:44:18,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:44:18,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-02 12:44:18,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:44:18,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-02 12:44:18,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=507, Invalid=8805, Unknown=0, NotChecked=0, Total=9312 [2023-12-02 12:44:18,976 INFO L87 Difference]: Start difference. First operand 11715 states and 13379 transitions. Second operand has 32 states, 20 states have (on average 11.75) internal successors, (235), 25 states have internal predecessors, (235), 13 states have call successors, (43), 9 states have call predecessors, (43), 17 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) [2023-12-02 12:44:25,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:44:25,494 INFO L93 Difference]: Finished difference Result 34485 states and 40371 transitions. [2023-12-02 12:44:25,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-12-02 12:44:25,495 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 20 states have (on average 11.75) internal successors, (235), 25 states have internal predecessors, (235), 13 states have call successors, (43), 9 states have call predecessors, (43), 17 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) Word has length 170 [2023-12-02 12:44:25,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:44:25,551 INFO L225 Difference]: With dead ends: 34485 [2023-12-02 12:44:25,551 INFO L226 Difference]: Without dead ends: 26838 [2023-12-02 12:44:25,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 612 GetRequests, 448 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9697 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=2504, Invalid=24556, Unknown=0, NotChecked=0, Total=27060 [2023-12-02 12:44:25,574 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 2475 mSDsluCounter, 1743 mSDsCounter, 0 mSdLazyCounter, 3069 mSolverCounterSat, 876 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2477 SdHoareTripleChecker+Valid, 1862 SdHoareTripleChecker+Invalid, 3945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 876 IncrementalHoareTripleChecker+Valid, 3069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-12-02 12:44:25,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2477 Valid, 1862 Invalid, 3945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [876 Valid, 3069 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-12-02 12:44:25,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26838 states. [2023-12-02 12:44:27,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26838 to 16645. [2023-12-02 12:44:27,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16645 states, 13639 states have (on average 1.1398196348705918) internal successors, (15546), 13756 states have internal predecessors, (15546), 1565 states have call successors, (1565), 1373 states have call predecessors, (1565), 1440 states have return successors, (1911), 1516 states have call predecessors, (1911), 1563 states have call successors, (1911) [2023-12-02 12:44:27,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16645 states to 16645 states and 19022 transitions. [2023-12-02 12:44:27,948 INFO L78 Accepts]: Start accepts. Automaton has 16645 states and 19022 transitions. Word has length 170 [2023-12-02 12:44:27,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:44:27,948 INFO L495 AbstractCegarLoop]: Abstraction has 16645 states and 19022 transitions. [2023-12-02 12:44:27,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 20 states have (on average 11.75) internal successors, (235), 25 states have internal predecessors, (235), 13 states have call successors, (43), 9 states have call predecessors, (43), 17 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) [2023-12-02 12:44:27,948 INFO L276 IsEmpty]: Start isEmpty. Operand 16645 states and 19022 transitions. [2023-12-02 12:44:27,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-12-02 12:44:27,958 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:44:27,958 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:44:27,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-12-02 12:44:28,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-02 12:44:28,158 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:44:28,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:44:28,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1672357950, now seen corresponding path program 1 times [2023-12-02 12:44:28,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:44:28,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029283897] [2023-12-02 12:44:28,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:28,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:44:28,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:28,294 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2023-12-02 12:44:28,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:44:28,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029283897] [2023-12-02 12:44:28,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029283897] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:44:28,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:44:28,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 12:44:28,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895127099] [2023-12-02 12:44:28,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:44:28,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:44:28,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:44:28,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:44:28,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:44:28,296 INFO L87 Difference]: Start difference. First operand 16645 states and 19022 transitions. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 6 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-12-02 12:44:34,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:44:34,559 INFO L93 Difference]: Finished difference Result 65121 states and 74881 transitions. [2023-12-02 12:44:34,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 12:44:34,560 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 6 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 181 [2023-12-02 12:44:34,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:44:34,698 INFO L225 Difference]: With dead ends: 65121 [2023-12-02 12:44:34,698 INFO L226 Difference]: Without dead ends: 58892 [2023-12-02 12:44:34,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 12:44:34,722 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 393 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 1165 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:44:34,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 1165 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 12:44:34,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58892 states. [2023-12-02 12:44:39,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58892 to 41233. [2023-12-02 12:44:39,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41233 states, 33460 states have (on average 1.136670651524208) internal successors, (38033), 33768 states have internal predecessors, (38033), 4094 states have call successors, (4094), 3494 states have call predecessors, (4094), 3678 states have return successors, (5124), 3971 states have call predecessors, (5124), 4092 states have call successors, (5124) [2023-12-02 12:44:39,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41233 states to 41233 states and 47251 transitions. [2023-12-02 12:44:39,464 INFO L78 Accepts]: Start accepts. Automaton has 41233 states and 47251 transitions. Word has length 181 [2023-12-02 12:44:39,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:44:39,465 INFO L495 AbstractCegarLoop]: Abstraction has 41233 states and 47251 transitions. [2023-12-02 12:44:39,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 6 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-12-02 12:44:39,465 INFO L276 IsEmpty]: Start isEmpty. Operand 41233 states and 47251 transitions. [2023-12-02 12:44:39,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2023-12-02 12:44:39,484 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:44:39,484 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:44:39,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-12-02 12:44:39,484 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:44:39,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:44:39,485 INFO L85 PathProgramCache]: Analyzing trace with hash -889420571, now seen corresponding path program 1 times [2023-12-02 12:44:39,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:44:39,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278578342] [2023-12-02 12:44:39,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:39,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:44:39,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:39,913 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 14 proven. 61 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2023-12-02 12:44:39,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:44:39,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278578342] [2023-12-02 12:44:39,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278578342] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:44:39,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284020237] [2023-12-02 12:44:39,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:39,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:44:39,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:44:39,915 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:44:39,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-02 12:44:40,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:40,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 12:44:40,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:44:40,240 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 136 proven. 46 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-12-02 12:44:40,240 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:44:40,493 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 42 proven. 3 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2023-12-02 12:44:40,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284020237] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:44:40,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [801677860] [2023-12-02 12:44:40,496 INFO L159 IcfgInterpreter]: Started Sifa with 80 locations of interest [2023-12-02 12:44:40,497 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:44:40,497 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:44:40,497 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:44:40,497 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:44:46,468 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 12 for LOIs [2023-12-02 12:44:46,470 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 94 for LOIs [2023-12-02 12:44:46,510 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 102 for LOIs [2023-12-02 12:44:46,554 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 1 for LOIs [2023-12-02 12:44:46,555 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 1 for LOIs [2023-12-02 12:44:46,561 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 36 for LOIs [2023-12-02 12:44:46,708 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 1 for LOIs [2023-12-02 12:44:46,781 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:44:56,538 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '862961#(and (= ~m_pc~0 1) (not (= ~token~0 (+ 3 ~local~0))) (= ~m_st~0 1))' at error location [2023-12-02 12:44:56,538 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:44:56,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:44:56,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 6] total 21 [2023-12-02 12:44:56,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606338868] [2023-12-02 12:44:56,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:44:56,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-02 12:44:56,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:44:56,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-02 12:44:56,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=6558, Unknown=0, NotChecked=0, Total=6972 [2023-12-02 12:44:56,542 INFO L87 Difference]: Start difference. First operand 41233 states and 47251 transitions. Second operand has 21 states, 17 states have (on average 10.235294117647058) internal successors, (174), 19 states have internal predecessors, (174), 8 states have call successors, (41), 5 states have call predecessors, (41), 7 states have return successors, (40), 8 states have call predecessors, (40), 8 states have call successors, (40) [2023-12-02 12:45:01,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:45:01,849 INFO L93 Difference]: Finished difference Result 63276 states and 72960 transitions. [2023-12-02 12:45:01,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-12-02 12:45:01,849 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 10.235294117647058) internal successors, (174), 19 states have internal predecessors, (174), 8 states have call successors, (41), 5 states have call predecessors, (41), 7 states have return successors, (40), 8 states have call predecessors, (40), 8 states have call successors, (40) Word has length 189 [2023-12-02 12:45:01,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:45:01,884 INFO L225 Difference]: With dead ends: 63276 [2023-12-02 12:45:01,884 INFO L226 Difference]: Without dead ends: 22051 [2023-12-02 12:45:01,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 686 GetRequests, 523 SyntacticMatches, 3 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9631 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=1431, Invalid=24651, Unknown=0, NotChecked=0, Total=26082 [2023-12-02 12:45:01,918 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 1432 mSDsluCounter, 1945 mSDsCounter, 0 mSdLazyCounter, 1474 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1442 SdHoareTripleChecker+Valid, 2155 SdHoareTripleChecker+Invalid, 1765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 1474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 12:45:01,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1442 Valid, 2155 Invalid, 1765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 1474 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 12:45:01,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22051 states. [2023-12-02 12:45:03,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22051 to 13175. [2023-12-02 12:45:03,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13175 states, 10756 states have (on average 1.110449981405727) internal successors, (11944), 10820 states have internal predecessors, (11944), 1262 states have call successors, (1262), 1111 states have call predecessors, (1262), 1156 states have return successors, (1572), 1243 states have call predecessors, (1572), 1260 states have call successors, (1572) [2023-12-02 12:45:03,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13175 states to 13175 states and 14778 transitions. [2023-12-02 12:45:03,542 INFO L78 Accepts]: Start accepts. Automaton has 13175 states and 14778 transitions. Word has length 189 [2023-12-02 12:45:03,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:45:03,542 INFO L495 AbstractCegarLoop]: Abstraction has 13175 states and 14778 transitions. [2023-12-02 12:45:03,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 10.235294117647058) internal successors, (174), 19 states have internal predecessors, (174), 8 states have call successors, (41), 5 states have call predecessors, (41), 7 states have return successors, (40), 8 states have call predecessors, (40), 8 states have call successors, (40) [2023-12-02 12:45:03,542 INFO L276 IsEmpty]: Start isEmpty. Operand 13175 states and 14778 transitions. [2023-12-02 12:45:03,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2023-12-02 12:45:03,545 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:45:03,545 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:45:03,550 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-12-02 12:45:03,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-02 12:45:03,746 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:45:03,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:45:03,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1515689406, now seen corresponding path program 1 times [2023-12-02 12:45:03,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:45:03,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601148954] [2023-12-02 12:45:03,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:45:03,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:45:03,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 12:45:03,765 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 12:45:03,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 12:45:03,871 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 12:45:03,871 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 12:45:03,872 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-02 12:45:03,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-12-02 12:45:03,877 INFO L445 BasicCegarLoop]: Path program 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 12:45:03,881 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 12:45:03,955 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret6 could not be translated [2023-12-02 12:45:03,960 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret6 could not be translated [2023-12-02 12:45:03,978 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret6 could not be translated [2023-12-02 12:45:04,016 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 12:45:04 BoogieIcfgContainer [2023-12-02 12:45:04,016 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 12:45:04,017 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 12:45:04,017 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 12:45:04,017 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 12:45:04,018 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:41:02" (3/4) ... [2023-12-02 12:45:04,018 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-12-02 12:45:04,053 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret6 could not be translated [2023-12-02 12:45:04,055 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret6 could not be translated [2023-12-02 12:45:04,067 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret6 could not be translated [2023-12-02 12:45:04,171 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/witness.graphml [2023-12-02 12:45:04,171 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 12:45:04,172 INFO L158 Benchmark]: Toolchain (without parser) took 242306.43ms. Allocated memory was 132.1MB in the beginning and 6.7GB in the end (delta: 6.6GB). Free memory was 100.4MB in the beginning and 896.3MB in the end (delta: -796.0MB). Peak memory consumption was 5.8GB. Max. memory is 16.1GB. [2023-12-02 12:45:04,172 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 96.5MB. Free memory is still 48.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 12:45:04,172 INFO L158 Benchmark]: CACSL2BoogieTranslator took 296.99ms. Allocated memory is still 132.1MB. Free memory was 100.4MB in the beginning and 85.3MB in the end (delta: 15.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-12-02 12:45:04,173 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.06ms. Allocated memory is still 132.1MB. Free memory was 85.3MB in the beginning and 82.9MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 12:45:04,173 INFO L158 Benchmark]: Boogie Preprocessor took 32.50ms. Allocated memory is still 132.1MB. Free memory was 82.9MB in the beginning and 80.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 12:45:04,173 INFO L158 Benchmark]: RCFGBuilder took 736.09ms. Allocated memory was 132.1MB in the beginning and 159.4MB in the end (delta: 27.3MB). Free memory was 80.7MB in the beginning and 104.7MB in the end (delta: -23.9MB). Peak memory consumption was 36.0MB. Max. memory is 16.1GB. [2023-12-02 12:45:04,174 INFO L158 Benchmark]: TraceAbstraction took 241040.35ms. Allocated memory was 159.4MB in the beginning and 6.7GB in the end (delta: 6.6GB). Free memory was 104.7MB in the beginning and 918.3MB in the end (delta: -813.6MB). Peak memory consumption was 5.8GB. Max. memory is 16.1GB. [2023-12-02 12:45:04,174 INFO L158 Benchmark]: Witness Printer took 154.43ms. Allocated memory is still 6.7GB. Free memory was 918.3MB in the beginning and 896.3MB in the end (delta: 22.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2023-12-02 12:45:04,176 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 96.5MB. Free memory is still 48.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 296.99ms. Allocated memory is still 132.1MB. Free memory was 100.4MB in the beginning and 85.3MB in the end (delta: 15.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.06ms. Allocated memory is still 132.1MB. Free memory was 85.3MB in the beginning and 82.9MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.50ms. Allocated memory is still 132.1MB. Free memory was 82.9MB in the beginning and 80.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 736.09ms. Allocated memory was 132.1MB in the beginning and 159.4MB in the end (delta: 27.3MB). Free memory was 80.7MB in the beginning and 104.7MB in the end (delta: -23.9MB). Peak memory consumption was 36.0MB. Max. memory is 16.1GB. * TraceAbstraction took 241040.35ms. Allocated memory was 159.4MB in the beginning and 6.7GB in the end (delta: 6.6GB). Free memory was 104.7MB in the beginning and 918.3MB in the end (delta: -813.6MB). Peak memory consumption was 5.8GB. Max. memory is 16.1GB. * Witness Printer took 154.43ms. Allocated memory is still 6.7GB. Free memory was 918.3MB in the beginning and 896.3MB in the end (delta: 22.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret6 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret6 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 20]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L24] int m_pc = 0; [L25] int t1_pc = 0; [L26] int t2_pc = 0; [L27] int t3_pc = 0; [L28] int m_st ; [L29] int t1_st ; [L30] int t2_st ; [L31] int t3_st ; [L32] int m_i ; [L33] int t1_i ; [L34] int t2_i ; [L35] int t3_i ; [L36] int M_E = 2; [L37] int T1_E = 2; [L38] int T2_E = 2; [L39] int T3_E = 2; [L40] int E_M = 2; [L41] int E_1 = 2; [L42] int E_2 = 2; [L43] int E_3 = 2; [L49] int token ; [L51] int local ; [L735] int __retres1 ; [L739] CALL init_model() [L648] m_i = 1 [L649] t1_i = 1 [L650] t2_i = 1 [L651] t3_i = 1 [L739] RET init_model() [L740] CALL start_simulation() [L676] int kernel_st ; [L677] int tmp ; [L678] int tmp___0 ; [L682] kernel_st = 0 VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, kernel_st=0, local=0, m_i=1, m_pc=0, m_st=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t3_i=1, t3_pc=0, t3_st=0, token=0] [L683] FCALL update_channels() VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, kernel_st=0, local=0, m_i=1, m_pc=0, m_st=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t3_i=1, t3_pc=0, t3_st=0, token=0] [L684] CALL init_threads() [L304] COND TRUE m_i == 1 [L305] m_st = 0 [L309] COND TRUE t1_i == 1 [L310] t1_st = 0 [L314] COND TRUE t2_i == 1 [L315] t2_st = 0 [L319] COND TRUE t3_i == 1 [L320] t3_st = 0 [L684] RET init_threads() [L685] CALL fire_delta_events() VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(E_1)=2, \old(E_2)=2, \old(E_3)=2, \old(E_M)=2, \old(M_E)=2, \old(T1_E)=2, \old(T2_E)=2, \old(T3_E)=2, local=0, m_i=1, m_pc=0, m_st=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t3_i=1, t3_pc=0, t3_st=0, token=0] [L441] COND FALSE !(M_E == 0) [L446] COND FALSE !(T1_E == 0) [L451] COND FALSE !(T2_E == 0) [L456] COND FALSE !(T3_E == 0) [L461] COND FALSE !(E_M == 0) [L466] COND FALSE !(E_1 == 0) [L471] COND FALSE !(E_2 == 0) [L476] COND FALSE !(E_3 == 0) [L685] RET fire_delta_events() VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, kernel_st=0, local=0, m_i=1, m_pc=0, m_st=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t3_i=1, t3_pc=0, t3_st=0, token=0] [L686] CALL activate_threads() VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, \old(t3_st)=0, local=0, m_i=1, m_pc=0, m_st=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t3_i=1, t3_pc=0, t3_st=0, token=0] [L534] int tmp ; [L535] int tmp___0 ; [L536] int tmp___1 ; [L537] int tmp___2 ; [L541] CALL, EXPR is_master_triggered() [L217] int __retres1 ; VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, \old(t3_st)=0, local=0, m_i=1, m_pc=0, m_st=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t3_i=1, t3_pc=0, t3_st=0, token=0] [L220] COND FALSE !(m_pc == 1) VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, \old(t3_st)=0, local=0, m_i=1, m_pc=0, m_st=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t3_i=1, t3_pc=0, t3_st=0, token=0] [L230] __retres1 = 0 VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, \old(t3_st)=0, __retres1=0, local=0, m_i=1, m_pc=0, m_st=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t3_i=1, t3_pc=0, t3_st=0, token=0] [L232] return (__retres1); [L541] RET, EXPR is_master_triggered() [L541] tmp = is_master_triggered() [L543] COND FALSE !(\read(tmp)) [L549] CALL, EXPR is_transmit1_triggered() [L236] int __retres1 ; VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, \old(t3_st)=0, local=0, m_i=1, m_pc=0, m_st=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t3_i=1, t3_pc=0, t3_st=0, token=0] [L239] COND FALSE !(t1_pc == 1) VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, \old(t3_st)=0, local=0, m_i=1, m_pc=0, m_st=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t3_i=1, t3_pc=0, t3_st=0, token=0] [L249] __retres1 = 0 VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, \old(t3_st)=0, __retres1=0, local=0, m_i=1, m_pc=0, m_st=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t3_i=1, t3_pc=0, t3_st=0, token=0] [L251] return (__retres1); [L549] RET, EXPR is_transmit1_triggered() [L549] tmp___0 = is_transmit1_triggered() [L551] COND FALSE !(\read(tmp___0)) [L557] CALL, EXPR is_transmit2_triggered() [L255] int __retres1 ; VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, \old(t3_st)=0, local=0, m_i=1, m_pc=0, m_st=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t3_i=1, t3_pc=0, t3_st=0, token=0] [L258] COND FALSE !(t2_pc == 1) VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, \old(t3_st)=0, local=0, m_i=1, m_pc=0, m_st=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t3_i=1, t3_pc=0, t3_st=0, token=0] [L268] __retres1 = 0 VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, \old(t3_st)=0, __retres1=0, local=0, m_i=1, m_pc=0, m_st=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t3_i=1, t3_pc=0, t3_st=0, token=0] [L270] return (__retres1); [L557] RET, EXPR is_transmit2_triggered() [L557] tmp___1 = is_transmit2_triggered() [L559] COND FALSE !(\read(tmp___1)) [L565] CALL, EXPR is_transmit3_triggered() [L274] int __retres1 ; VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, \old(t3_st)=0, local=0, m_i=1, m_pc=0, m_st=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t3_i=1, t3_pc=0, t3_st=0, token=0] [L277] COND FALSE !(t3_pc == 1) VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, \old(t3_st)=0, local=0, m_i=1, m_pc=0, m_st=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t3_i=1, t3_pc=0, t3_st=0, token=0] [L287] __retres1 = 0 VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, \old(t3_st)=0, __retres1=0, local=0, m_i=1, m_pc=0, m_st=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t3_i=1, t3_pc=0, t3_st=0, token=0] [L289] return (__retres1); [L565] RET, EXPR is_transmit3_triggered() [L565] tmp___2 = is_transmit3_triggered() [L567] COND FALSE !(\read(tmp___2)) [L686] RET activate_threads() VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, kernel_st=0, local=0, m_i=1, m_pc=0, m_st=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t3_i=1, t3_pc=0, t3_st=0, token=0] [L687] CALL reset_delta_events() VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(E_1)=2, \old(E_2)=2, \old(E_3)=2, \old(E_M)=2, \old(M_E)=2, \old(T1_E)=2, \old(T2_E)=2, \old(T3_E)=2, local=0, m_i=1, m_pc=0, m_st=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t3_i=1, t3_pc=0, t3_st=0, token=0] [L489] COND FALSE !(M_E == 1) [L494] COND FALSE !(T1_E == 1) [L499] COND FALSE !(T2_E == 1) [L504] COND FALSE !(T3_E == 1) [L509] COND FALSE !(E_M == 1) [L514] COND FALSE !(E_1 == 1) [L519] COND FALSE !(E_2 == 1) [L524] COND FALSE !(E_3 == 1) [L687] RET reset_delta_events() VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, kernel_st=0, local=0, m_i=1, m_pc=0, m_st=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t3_i=1, t3_pc=0, t3_st=0, token=0] [L690] COND TRUE 1 [L693] kernel_st = 1 [L694] CALL eval() [L360] int tmp ; VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=0, m_st=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t3_i=1, t3_pc=0, t3_st=0, token=0] [L364] COND TRUE 1 VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=0, m_st=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t3_i=1, t3_pc=0, t3_st=0, token=0] [L367] CALL, EXPR exists_runnable_thread() VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=0, m_st=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t3_i=1, t3_pc=0, t3_st=0, token=0] [L329] int __retres1 ; [L332] COND TRUE m_st == 0 [L333] __retres1 = 1 [L355] return (__retres1); [L367] RET, EXPR exists_runnable_thread() VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=0, m_st=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t3_i=1, t3_pc=0, t3_st=0, token=0] [L367] tmp = exists_runnable_thread() [L369] COND TRUE \read(tmp) VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=0, m_st=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t3_i=1, t3_pc=0, t3_st=0, tmp=1, token=0] [L374] COND TRUE m_st == 0 [L375] int tmp_ndt_1; [L376] EXPR tmp_ndt_1 = __VERIFIER_nondet_int() [L377] COND FALSE, EXPR !(\read(tmp_ndt_1)) VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=0, m_st=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t3_i=1, t3_pc=0, t3_st=0, tmp=1, tmp_ndt_1=0, token=0] [L374-L385] { int tmp_ndt_1; tmp_ndt_1 = __VERIFIER_nondet_int(); if (tmp_ndt_1) { { m_st = 1; master(); } } else { } } VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=0, m_st=0, t1_i=1, t1_pc=0, t1_st=0, t2_i=1, t2_pc=0, t2_st=0, t3_i=1, t3_pc=0, t3_st=0, tmp=1, token=0] [L388] COND TRUE t1_st == 0 [L389] int tmp_ndt_2; [L390] EXPR tmp_ndt_2 = __VERIFIER_nondet_int() [L391] COND TRUE, EXPR \read(tmp_ndt_2) [L393] EXPR t1_st = 1 [L394] CALL, EXPR transmit1() [L112] COND TRUE t1_pc == 0 VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=0, m_st=0, t1_i=1, t1_pc=0, t1_st=1, t2_i=1, t2_pc=0, t2_st=0, t3_i=1, t3_pc=0, t3_st=0, token=0] [L123] COND TRUE 1 [L125] t1_pc = 1 [L126] t1_st = 2 [L394] RET, EXPR transmit1() [L388-L399] { int tmp_ndt_2; tmp_ndt_2 = __VERIFIER_nondet_int(); if (tmp_ndt_2) { { t1_st = 1; transmit1(); } } else { } } VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=0, m_st=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=0, t2_st=0, t3_i=1, t3_pc=0, t3_st=0, tmp=1, token=0] [L402] COND TRUE t2_st == 0 [L403] int tmp_ndt_3; [L404] EXPR tmp_ndt_3 = __VERIFIER_nondet_int() [L405] COND TRUE, EXPR \read(tmp_ndt_3) [L407] EXPR t2_st = 1 [L408] CALL, EXPR transmit2() [L148] COND TRUE t2_pc == 0 VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=0, m_st=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=0, t2_st=1, t3_i=1, t3_pc=0, t3_st=0, token=0] [L159] COND TRUE 1 [L161] t2_pc = 1 [L162] t2_st = 2 [L408] RET, EXPR transmit2() [L402-L413] { int tmp_ndt_3; tmp_ndt_3 = __VERIFIER_nondet_int(); if (tmp_ndt_3) { { t2_st = 1; transmit2(); } } else { } } VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=0, m_st=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=0, t3_st=0, tmp=1, token=0] [L416] COND TRUE t3_st == 0 [L417] int tmp_ndt_4; [L418] EXPR tmp_ndt_4 = __VERIFIER_nondet_int() [L419] COND TRUE, EXPR \read(tmp_ndt_4) [L421] EXPR t3_st = 1 [L422] CALL, EXPR transmit3() [L184] COND TRUE t3_pc == 0 VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=0, m_st=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=0, t3_st=1, token=0] [L195] COND TRUE 1 [L197] t3_pc = 1 [L198] t3_st = 2 [L422] RET, EXPR transmit3() [L416-L427] { int tmp_ndt_4; tmp_ndt_4 = __VERIFIER_nondet_int(); if (tmp_ndt_4) { { t3_st = 1; transmit3(); } } else { } } VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=0, m_st=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, tmp=1, token=0] [L364] COND TRUE 1 VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=0, m_st=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, tmp=1, token=0] [L367] CALL, EXPR exists_runnable_thread() VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=0, m_st=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L329] int __retres1 ; [L332] COND TRUE m_st == 0 [L333] __retres1 = 1 [L355] return (__retres1); [L367] RET, EXPR exists_runnable_thread() VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=0, m_st=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, tmp=1, token=0] [L367] tmp = exists_runnable_thread() [L369] COND TRUE \read(tmp) VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=0, m_st=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, tmp=1, token=0] [L374] COND TRUE m_st == 0 [L375] int tmp_ndt_1; [L376] EXPR tmp_ndt_1 = __VERIFIER_nondet_int() [L377] COND TRUE, EXPR \read(tmp_ndt_1) [L379] EXPR m_st = 1 [L380] CALL, EXPR master() [L54] int tmp_var = __VERIFIER_nondet_int(); [L56] COND TRUE m_pc == 0 VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=0, m_st=1, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, tmp_var=0, token=0] [L67] COND TRUE 1 [L70] token = __VERIFIER_nondet_int() [L71] local = token [L72] E_1 = 1 VAL [E_1=1, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=0, m_st=1, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, tmp_var=0, token=0] [L73] CALL immediate_notify() VAL [E_1=1, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, local=0, m_i=1, m_pc=0, m_st=1, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L581] CALL activate_threads() VAL [E_1=1, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, local=0, m_i=1, m_pc=0, m_st=1, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L534] int tmp ; [L535] int tmp___0 ; [L536] int tmp___1 ; [L537] int tmp___2 ; [L541] CALL, EXPR is_master_triggered() [L217] int __retres1 ; VAL [E_1=1, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, local=0, m_i=1, m_pc=0, m_st=1, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L220] COND FALSE !(m_pc == 1) VAL [E_1=1, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, local=0, m_i=1, m_pc=0, m_st=1, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L230] __retres1 = 0 VAL [E_1=1, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, __retres1=0, local=0, m_i=1, m_pc=0, m_st=1, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L232] return (__retres1); [L541] RET, EXPR is_master_triggered() [L541] tmp = is_master_triggered() [L543] COND FALSE !(\read(tmp)) [L549] CALL, EXPR is_transmit1_triggered() [L236] int __retres1 ; VAL [E_1=1, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, local=0, m_i=1, m_pc=0, m_st=1, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L239] COND TRUE t1_pc == 1 VAL [E_1=1, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, local=0, m_i=1, m_pc=0, m_st=1, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L240] COND TRUE E_1 == 1 [L241] __retres1 = 1 VAL [E_1=1, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, __retres1=1, local=0, m_i=1, m_pc=0, m_st=1, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L251] return (__retres1); [L549] RET, EXPR is_transmit1_triggered() [L549] tmp___0 = is_transmit1_triggered() [L551] COND TRUE \read(tmp___0) [L552] t1_st = 0 [L557] CALL, EXPR is_transmit2_triggered() [L255] int __retres1 ; VAL [E_1=1, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, local=0, m_i=1, m_pc=0, m_st=1, t1_i=1, t1_pc=1, t1_st=0, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L258] COND TRUE t2_pc == 1 VAL [E_1=1, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, local=0, m_i=1, m_pc=0, m_st=1, t1_i=1, t1_pc=1, t1_st=0, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L259] COND FALSE !(E_2 == 1) VAL [E_1=1, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, local=0, m_i=1, m_pc=0, m_st=1, t1_i=1, t1_pc=1, t1_st=0, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L268] __retres1 = 0 VAL [E_1=1, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, __retres1=0, local=0, m_i=1, m_pc=0, m_st=1, t1_i=1, t1_pc=1, t1_st=0, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L270] return (__retres1); [L557] RET, EXPR is_transmit2_triggered() [L557] tmp___1 = is_transmit2_triggered() [L559] COND FALSE !(\read(tmp___1)) [L565] CALL, EXPR is_transmit3_triggered() [L274] int __retres1 ; VAL [E_1=1, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, local=0, m_i=1, m_pc=0, m_st=1, t1_i=1, t1_pc=1, t1_st=0, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L277] COND TRUE t3_pc == 1 VAL [E_1=1, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, local=0, m_i=1, m_pc=0, m_st=1, t1_i=1, t1_pc=1, t1_st=0, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L278] COND FALSE !(E_3 == 1) VAL [E_1=1, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, local=0, m_i=1, m_pc=0, m_st=1, t1_i=1, t1_pc=1, t1_st=0, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L287] __retres1 = 0 VAL [E_1=1, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, __retres1=0, local=0, m_i=1, m_pc=0, m_st=1, t1_i=1, t1_pc=1, t1_st=0, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L289] return (__retres1); [L565] RET, EXPR is_transmit3_triggered() [L565] tmp___2 = is_transmit3_triggered() [L567] COND FALSE !(\read(tmp___2)) [L581] RET activate_threads() VAL [E_1=1, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, local=0, m_i=1, m_pc=0, m_st=1, t1_i=1, t1_pc=1, t1_st=0, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L73] RET immediate_notify() VAL [E_1=1, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=0, m_st=1, t1_i=1, t1_pc=1, t1_st=0, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, tmp_var=0, token=0] [L74] E_1 = 2 [L75] m_pc = 1 [L76] m_st = 2 VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=0, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, tmp_var=0, token=0] [L380] RET, EXPR master() [L374-L385] { int tmp_ndt_1; tmp_ndt_1 = __VERIFIER_nondet_int(); if (tmp_ndt_1) { { m_st = 1; master(); } } else { } } VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=0, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, tmp=1, token=0] [L388] COND TRUE t1_st == 0 [L389] int tmp_ndt_2; [L390] EXPR tmp_ndt_2 = __VERIFIER_nondet_int() [L391] COND TRUE, EXPR \read(tmp_ndt_2) [L393] EXPR t1_st = 1 [L394] CALL, EXPR transmit1() [L112] COND FALSE !(t1_pc == 0) VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L115] COND TRUE t1_pc == 1 [L131] token += 1 [L132] E_2 = 1 VAL [E_1=2, E_2=1, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L133] CALL immediate_notify() VAL [E_1=2, E_2=1, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L581] CALL activate_threads() VAL [E_1=2, E_2=1, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L534] int tmp ; [L535] int tmp___0 ; [L536] int tmp___1 ; [L537] int tmp___2 ; [L541] CALL, EXPR is_master_triggered() [L217] int __retres1 ; VAL [E_1=2, E_2=1, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L220] COND TRUE m_pc == 1 VAL [E_1=2, E_2=1, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L221] COND FALSE !(E_M == 1) VAL [E_1=2, E_2=1, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L230] __retres1 = 0 VAL [E_1=2, E_2=1, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, __retres1=0, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L232] return (__retres1); [L541] RET, EXPR is_master_triggered() [L541] tmp = is_master_triggered() [L543] COND FALSE !(\read(tmp)) [L549] CALL, EXPR is_transmit1_triggered() [L236] int __retres1 ; VAL [E_1=2, E_2=1, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L239] COND TRUE t1_pc == 1 VAL [E_1=2, E_2=1, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L240] COND FALSE !(E_1 == 1) VAL [E_1=2, E_2=1, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L249] __retres1 = 0 VAL [E_1=2, E_2=1, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, __retres1=0, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L251] return (__retres1); [L549] RET, EXPR is_transmit1_triggered() [L549] tmp___0 = is_transmit1_triggered() [L551] COND FALSE !(\read(tmp___0)) [L557] CALL, EXPR is_transmit2_triggered() [L255] int __retres1 ; VAL [E_1=2, E_2=1, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L258] COND TRUE t2_pc == 1 VAL [E_1=2, E_2=1, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L259] COND TRUE E_2 == 1 [L260] __retres1 = 1 VAL [E_1=2, E_2=1, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, __retres1=1, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L270] return (__retres1); [L557] RET, EXPR is_transmit2_triggered() [L557] tmp___1 = is_transmit2_triggered() [L559] COND TRUE \read(tmp___1) [L560] t2_st = 0 [L565] CALL, EXPR is_transmit3_triggered() [L274] int __retres1 ; VAL [E_1=2, E_2=1, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=0, t3_i=1, t3_pc=1, t3_st=2, token=1] [L277] COND TRUE t3_pc == 1 VAL [E_1=2, E_2=1, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=0, t3_i=1, t3_pc=1, t3_st=2, token=1] [L278] COND FALSE !(E_3 == 1) VAL [E_1=2, E_2=1, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=0, t3_i=1, t3_pc=1, t3_st=2, token=1] [L287] __retres1 = 0 VAL [E_1=2, E_2=1, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, __retres1=0, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=0, t3_i=1, t3_pc=1, t3_st=2, token=1] [L289] return (__retres1); [L565] RET, EXPR is_transmit3_triggered() [L565] tmp___2 = is_transmit3_triggered() [L567] COND FALSE !(\read(tmp___2)) [L581] RET activate_threads() VAL [E_1=2, E_2=1, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=0, t3_i=1, t3_pc=1, t3_st=2, token=1] [L133] RET immediate_notify() VAL [E_1=2, E_2=1, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=0, t3_i=1, t3_pc=1, t3_st=2, token=1] [L134] E_2 = 2 VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=1, t2_i=1, t2_pc=1, t2_st=0, t3_i=1, t3_pc=1, t3_st=2, token=1] [L123] COND TRUE 1 [L125] t1_pc = 1 [L126] t1_st = 2 [L394] RET, EXPR transmit1() [L388-L399] { int tmp_ndt_2; tmp_ndt_2 = __VERIFIER_nondet_int(); if (tmp_ndt_2) { { t1_st = 1; transmit1(); } } else { } } VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=0, t3_i=1, t3_pc=1, t3_st=2, tmp=1, token=1] [L402] COND TRUE t2_st == 0 [L403] int tmp_ndt_3; [L404] EXPR tmp_ndt_3 = __VERIFIER_nondet_int() [L405] COND TRUE, EXPR \read(tmp_ndt_3) [L407] EXPR t2_st = 1 [L408] CALL, EXPR transmit2() [L148] COND FALSE !(t2_pc == 0) VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, t3_i=1, t3_pc=1, t3_st=2, token=1] [L151] COND TRUE t2_pc == 1 [L167] token += 1 [L168] E_3 = 1 VAL [E_1=2, E_2=2, E_3=1, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, t3_i=1, t3_pc=1, t3_st=2, token=2] [L169] CALL immediate_notify() VAL [E_1=2, E_2=2, E_3=1, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, t3_i=1, t3_pc=1, t3_st=2, token=2] [L581] CALL activate_threads() VAL [E_1=2, E_2=2, E_3=1, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, t3_i=1, t3_pc=1, t3_st=2, token=2] [L534] int tmp ; [L535] int tmp___0 ; [L536] int tmp___1 ; [L537] int tmp___2 ; [L541] CALL, EXPR is_master_triggered() [L217] int __retres1 ; VAL [E_1=2, E_2=2, E_3=1, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, t3_i=1, t3_pc=1, t3_st=2, token=2] [L220] COND TRUE m_pc == 1 VAL [E_1=2, E_2=2, E_3=1, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, t3_i=1, t3_pc=1, t3_st=2, token=2] [L221] COND FALSE !(E_M == 1) VAL [E_1=2, E_2=2, E_3=1, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, t3_i=1, t3_pc=1, t3_st=2, token=2] [L230] __retres1 = 0 VAL [E_1=2, E_2=2, E_3=1, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, __retres1=0, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, t3_i=1, t3_pc=1, t3_st=2, token=2] [L232] return (__retres1); [L541] RET, EXPR is_master_triggered() [L541] tmp = is_master_triggered() [L543] COND FALSE !(\read(tmp)) [L549] CALL, EXPR is_transmit1_triggered() [L236] int __retres1 ; VAL [E_1=2, E_2=2, E_3=1, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, t3_i=1, t3_pc=1, t3_st=2, token=2] [L239] COND TRUE t1_pc == 1 VAL [E_1=2, E_2=2, E_3=1, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, t3_i=1, t3_pc=1, t3_st=2, token=2] [L240] COND FALSE !(E_1 == 1) VAL [E_1=2, E_2=2, E_3=1, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, t3_i=1, t3_pc=1, t3_st=2, token=2] [L249] __retres1 = 0 VAL [E_1=2, E_2=2, E_3=1, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, __retres1=0, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, t3_i=1, t3_pc=1, t3_st=2, token=2] [L251] return (__retres1); [L549] RET, EXPR is_transmit1_triggered() [L549] tmp___0 = is_transmit1_triggered() [L551] COND FALSE !(\read(tmp___0)) [L557] CALL, EXPR is_transmit2_triggered() [L255] int __retres1 ; VAL [E_1=2, E_2=2, E_3=1, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, t3_i=1, t3_pc=1, t3_st=2, token=2] [L258] COND TRUE t2_pc == 1 VAL [E_1=2, E_2=2, E_3=1, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, t3_i=1, t3_pc=1, t3_st=2, token=2] [L259] COND FALSE !(E_2 == 1) VAL [E_1=2, E_2=2, E_3=1, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, t3_i=1, t3_pc=1, t3_st=2, token=2] [L268] __retres1 = 0 VAL [E_1=2, E_2=2, E_3=1, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, __retres1=0, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, t3_i=1, t3_pc=1, t3_st=2, token=2] [L270] return (__retres1); [L557] RET, EXPR is_transmit2_triggered() [L557] tmp___1 = is_transmit2_triggered() [L559] COND FALSE !(\read(tmp___1)) [L565] CALL, EXPR is_transmit3_triggered() [L274] int __retres1 ; VAL [E_1=2, E_2=2, E_3=1, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, t3_i=1, t3_pc=1, t3_st=2, token=2] [L277] COND TRUE t3_pc == 1 VAL [E_1=2, E_2=2, E_3=1, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, t3_i=1, t3_pc=1, t3_st=2, token=2] [L278] COND TRUE E_3 == 1 [L279] __retres1 = 1 VAL [E_1=2, E_2=2, E_3=1, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, __retres1=1, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, t3_i=1, t3_pc=1, t3_st=2, token=2] [L289] return (__retres1); [L565] RET, EXPR is_transmit3_triggered() [L565] tmp___2 = is_transmit3_triggered() [L567] COND TRUE \read(tmp___2) [L568] t3_st = 0 [L581] RET activate_threads() VAL [E_1=2, E_2=2, E_3=1, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, t3_i=1, t3_pc=1, t3_st=0, token=2] [L169] RET immediate_notify() VAL [E_1=2, E_2=2, E_3=1, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, t3_i=1, t3_pc=1, t3_st=0, token=2] [L170] E_3 = 2 VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=1, t3_i=1, t3_pc=1, t3_st=0, token=2] [L159] COND TRUE 1 [L161] t2_pc = 1 [L162] t2_st = 2 [L408] RET, EXPR transmit2() [L402-L413] { int tmp_ndt_3; tmp_ndt_3 = __VERIFIER_nondet_int(); if (tmp_ndt_3) { { t2_st = 1; transmit2(); } } else { } } VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=0, tmp=1, token=2] [L416] COND TRUE t3_st == 0 [L417] int tmp_ndt_4; [L418] EXPR tmp_ndt_4 = __VERIFIER_nondet_int() [L419] COND TRUE, EXPR \read(tmp_ndt_4) [L421] EXPR t3_st = 1 [L422] CALL, EXPR transmit3() [L184] COND FALSE !(t3_pc == 0) VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=1, token=2] [L187] COND TRUE t3_pc == 1 [L203] token += 1 [L204] E_M = 1 VAL [E_1=2, E_2=2, E_3=2, E_M=1, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L205] CALL immediate_notify() VAL [E_1=2, E_2=2, E_3=2, E_M=1, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L581] CALL activate_threads() VAL [E_1=2, E_2=2, E_3=2, E_M=1, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L534] int tmp ; [L535] int tmp___0 ; [L536] int tmp___1 ; [L537] int tmp___2 ; [L541] CALL, EXPR is_master_triggered() [L217] int __retres1 ; VAL [E_1=2, E_2=2, E_3=2, E_M=1, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L220] COND TRUE m_pc == 1 VAL [E_1=2, E_2=2, E_3=2, E_M=1, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L221] COND TRUE E_M == 1 [L222] __retres1 = 1 VAL [E_1=2, E_2=2, E_3=2, E_M=1, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, __retres1=1, local=0, m_i=1, m_pc=1, m_st=2, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L232] return (__retres1); [L541] RET, EXPR is_master_triggered() [L541] tmp = is_master_triggered() [L543] COND TRUE \read(tmp) [L544] m_st = 0 [L549] CALL, EXPR is_transmit1_triggered() [L236] int __retres1 ; VAL [E_1=2, E_2=2, E_3=2, E_M=1, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, local=0, m_i=1, m_pc=1, m_st=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L239] COND TRUE t1_pc == 1 VAL [E_1=2, E_2=2, E_3=2, E_M=1, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, local=0, m_i=1, m_pc=1, m_st=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L240] COND FALSE !(E_1 == 1) VAL [E_1=2, E_2=2, E_3=2, E_M=1, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, local=0, m_i=1, m_pc=1, m_st=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L249] __retres1 = 0 VAL [E_1=2, E_2=2, E_3=2, E_M=1, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, __retres1=0, local=0, m_i=1, m_pc=1, m_st=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L251] return (__retres1); [L549] RET, EXPR is_transmit1_triggered() [L549] tmp___0 = is_transmit1_triggered() [L551] COND FALSE !(\read(tmp___0)) [L557] CALL, EXPR is_transmit2_triggered() [L255] int __retres1 ; VAL [E_1=2, E_2=2, E_3=2, E_M=1, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, local=0, m_i=1, m_pc=1, m_st=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L258] COND TRUE t2_pc == 1 VAL [E_1=2, E_2=2, E_3=2, E_M=1, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, local=0, m_i=1, m_pc=1, m_st=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L259] COND FALSE !(E_2 == 1) VAL [E_1=2, E_2=2, E_3=2, E_M=1, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, local=0, m_i=1, m_pc=1, m_st=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L268] __retres1 = 0 VAL [E_1=2, E_2=2, E_3=2, E_M=1, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, __retres1=0, local=0, m_i=1, m_pc=1, m_st=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L270] return (__retres1); [L557] RET, EXPR is_transmit2_triggered() [L557] tmp___1 = is_transmit2_triggered() [L559] COND FALSE !(\read(tmp___1)) [L565] CALL, EXPR is_transmit3_triggered() [L274] int __retres1 ; VAL [E_1=2, E_2=2, E_3=2, E_M=1, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, local=0, m_i=1, m_pc=1, m_st=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L277] COND TRUE t3_pc == 1 VAL [E_1=2, E_2=2, E_3=2, E_M=1, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, local=0, m_i=1, m_pc=1, m_st=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L278] COND FALSE !(E_3 == 1) VAL [E_1=2, E_2=2, E_3=2, E_M=1, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, local=0, m_i=1, m_pc=1, m_st=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L287] __retres1 = 0 VAL [E_1=2, E_2=2, E_3=2, E_M=1, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, __retres1=0, local=0, m_i=1, m_pc=1, m_st=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L289] return (__retres1); [L565] RET, EXPR is_transmit3_triggered() [L565] tmp___2 = is_transmit3_triggered() [L567] COND FALSE !(\read(tmp___2)) [L581] RET activate_threads() VAL [E_1=2, E_2=2, E_3=2, E_M=1, M_E=2, T1_E=2, T2_E=2, T3_E=2, \old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, local=0, m_i=1, m_pc=1, m_st=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L205] RET immediate_notify() VAL [E_1=2, E_2=2, E_3=2, E_M=1, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=1, m_st=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L206] E_M = 2 VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=1, m_st=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L195] COND TRUE 1 [L197] t3_pc = 1 [L198] t3_st = 2 [L422] RET, EXPR transmit3() [L416-L427] { int tmp_ndt_4; tmp_ndt_4 = __VERIFIER_nondet_int(); if (tmp_ndt_4) { { t3_st = 1; transmit3(); } } else { } } VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=1, m_st=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, tmp=1, token=3] [L364] COND TRUE 1 VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=1, m_st=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, tmp=1, token=3] [L367] CALL, EXPR exists_runnable_thread() VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=1, m_st=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, token=3] [L329] int __retres1 ; [L332] COND TRUE m_st == 0 [L333] __retres1 = 1 [L355] return (__retres1); [L367] RET, EXPR exists_runnable_thread() VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=1, m_st=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, tmp=1, token=3] [L367] tmp = exists_runnable_thread() [L369] COND TRUE \read(tmp) VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=1, m_st=0, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, tmp=1, token=3] [L374] COND TRUE m_st == 0 [L375] int tmp_ndt_1; [L376] tmp_ndt_1 = __VERIFIER_nondet_int() [L377] COND TRUE \read(tmp_ndt_1) [L379] m_st = 1 [L380] CALL master() [L54] int tmp_var = __VERIFIER_nondet_int(); [L56] COND FALSE !(m_pc == 0) VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=1, m_st=1, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, tmp_var=5, token=3] [L59] COND TRUE m_pc == 1 VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=1, m_st=1, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, tmp_var=5, token=3] [L81] COND FALSE !(token != local + 3) [L86] COND TRUE tmp_var <= 5 [L87] COND TRUE tmp_var >= 5 VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=1, m_st=1, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, tmp_var=5, token=3] [L92] COND TRUE tmp_var <= 5 VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=1, m_st=1, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, tmp_var=5, token=3] [L93] COND TRUE tmp_var >= 5 VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=1, m_st=1, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, tmp_var=5, token=3] [L94] COND TRUE tmp_var == 5 VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=1, m_st=1, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, tmp_var=5, token=3] [L95] CALL error() VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=1, m_st=1, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, token=3] [L20] reach_error() VAL [E_1=2, E_2=2, E_3=2, E_M=2, M_E=2, T1_E=2, T2_E=2, T3_E=2, local=0, m_i=1, m_pc=1, m_st=1, t1_i=1, t1_pc=1, t1_st=2, t2_i=1, t2_pc=1, t2_st=2, t3_i=1, t3_pc=1, t3_st=2, token=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 99 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 240.8s, OverallIterations: 30, TraceHistogramMax: 8, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.3s, AutomataDifference: 44.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 10993 SdHoareTripleChecker+Valid, 8.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 10892 mSDsluCounter, 21104 SdHoareTripleChecker+Invalid, 7.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 15754 mSDsCounter, 2424 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12758 IncrementalHoareTripleChecker+Invalid, 15182 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2424 mSolverCounterUnsat, 5350 mSDtfsCounter, 12758 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4999 GetRequests, 4151 SyntacticMatches, 22 SemanticMatches, 826 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45985 ImplicationChecksByTransitivity, 35.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41233occurred in iteration=28, InterpolantAutomatonStates: 509, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 23.7s AutomataMinimizationTime, 29 MinimizatonAttempts, 61452 StatesRemovedByMinimization, 28 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 8.9s InterpolantComputationTime, 6682 NumberOfCodeBlocks, 6682 NumberOfCodeBlocksAsserted, 53 NumberOfCheckSat, 7091 ConstructedInterpolants, 0 QuantifiedInterpolants, 13008 SizeOfPredicates, 35 NumberOfNonLiveVariables, 13135 ConjunctsInSsa, 187 ConjunctsInUnsatCore, 56 InterpolantComputations, 25 PerfectInterpolantSequences, 4827/5445 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-12-02 12:45:04,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0e99f6df-d353-4a4d-b224-e91c2c9f0386/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE