./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.13.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.13.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX --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 21d4f13e72175539cc78aacb8d1d416269d0755bd0c7a4b3f37d9d8805a7ca70 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:47:12,070 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:47:12,138 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:47:12,144 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:47:12,145 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:47:12,169 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:47:12,170 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:47:12,171 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:47:12,172 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:47:12,173 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:47:12,173 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:47:12,174 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:47:12,174 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:47:12,175 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:47:12,176 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:47:12,176 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:47:12,177 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:47:12,177 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:47:12,178 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:47:12,179 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:47:12,179 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:47:12,182 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:47:12,183 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:47:12,183 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:47:12,184 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:47:12,184 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:47:12,185 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:47:12,185 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:47:12,186 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:47:12,186 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:47:12,188 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:47:12,188 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:47:12,188 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:47:12,189 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:47:12,189 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:47:12,189 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:47:12,190 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:47:12,190 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:47:12,190 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:47:12,191 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:47:12,191 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:47:12,191 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:47:12,192 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:47:12,192 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:47:12,193 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:47:12,193 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_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 21d4f13e72175539cc78aacb8d1d416269d0755bd0c7a4b3f37d9d8805a7ca70 [2023-11-12 00:47:12,499 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:47:12,534 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:47:12,537 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:47:12,538 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:47:12,539 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:47:12,542 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.13.cil-1.c [2023-11-12 00:47:15,753 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:47:16,526 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:47:16,527 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/sv-benchmarks/c/combinations/Problem05_label49+token_ring.13.cil-1.c [2023-11-12 00:47:16,589 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/data/e45057fce/e177da53b75245af973fa11e0fcdb37b/FLAG82c2d04d6 [2023-11-12 00:47:16,606 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/data/e45057fce/e177da53b75245af973fa11e0fcdb37b [2023-11-12 00:47:16,613 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:47:16,615 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:47:16,618 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:47:16,618 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:47:16,624 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:47:16,627 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:47:16" (1/1) ... [2023-11-12 00:47:16,628 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6821e082 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:16, skipping insertion in model container [2023-11-12 00:47:16,628 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:47:16" (1/1) ... [2023-11-12 00:47:16,919 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:47:19,373 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_fca2a759-e00c-44d3-9830-56e96b3d2a01/sv-benchmarks/c/combinations/Problem05_label49+token_ring.13.cil-1.c[380593,380606] [2023-11-12 00:47:19,403 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_fca2a759-e00c-44d3-9830-56e96b3d2a01/sv-benchmarks/c/combinations/Problem05_label49+token_ring.13.cil-1.c[383339,383352] [2023-11-12 00:47:19,785 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:47:19,797 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:47:21,107 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_fca2a759-e00c-44d3-9830-56e96b3d2a01/sv-benchmarks/c/combinations/Problem05_label49+token_ring.13.cil-1.c[380593,380606] [2023-11-12 00:47:21,113 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_fca2a759-e00c-44d3-9830-56e96b3d2a01/sv-benchmarks/c/combinations/Problem05_label49+token_ring.13.cil-1.c[383339,383352] [2023-11-12 00:47:21,159 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:47:21,251 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:47:21,252 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:21 WrapperNode [2023-11-12 00:47:21,252 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:47:21,255 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:47:21,256 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:47:21,256 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:47:21,264 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:21" (1/1) ... [2023-11-12 00:47:21,382 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:21" (1/1) ... [2023-11-12 00:47:21,909 INFO L138 Inliner]: procedures = 70, calls = 81, calls flagged for inlining = 47, calls inlined = 47, statements flattened = 13294 [2023-11-12 00:47:21,909 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:47:21,910 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:47:21,910 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:47:21,910 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:47:21,921 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:21" (1/1) ... [2023-11-12 00:47:21,922 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:21" (1/1) ... [2023-11-12 00:47:22,074 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:21" (1/1) ... [2023-11-12 00:47:22,084 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:21" (1/1) ... [2023-11-12 00:47:22,366 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:21" (1/1) ... [2023-11-12 00:47:22,505 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:21" (1/1) ... [2023-11-12 00:47:22,560 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:21" (1/1) ... [2023-11-12 00:47:22,604 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:21" (1/1) ... [2023-11-12 00:47:22,735 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:47:22,737 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:47:22,737 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:47:22,737 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:47:22,738 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:21" (1/1) ... [2023-11-12 00:47:22,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:47:22,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:47:22,802 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:47:22,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:47:22,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:47:22,873 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-12 00:47:22,873 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-12 00:47:22,875 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-12 00:47:22,876 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-12 00:47:22,876 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-12 00:47:22,877 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-12 00:47:22,877 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-11-12 00:47:22,877 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-11-12 00:47:22,877 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-12 00:47:22,878 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-12 00:47:22,878 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-12 00:47:22,878 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-12 00:47:22,878 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-12 00:47:22,879 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-12 00:47:22,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:47:22,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:47:22,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:47:23,085 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:47:23,088 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:47:33,245 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:47:36,298 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:47:36,298 INFO L302 CfgBuilder]: Removed 17 assume(true) statements. [2023-11-12 00:47:36,305 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:47:36 BoogieIcfgContainer [2023-11-12 00:47:36,305 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:47:36,308 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:47:36,308 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:47:36,312 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:47:36,312 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:47:16" (1/3) ... [2023-11-12 00:47:36,313 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7380a334 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:47:36, skipping insertion in model container [2023-11-12 00:47:36,314 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:47:21" (2/3) ... [2023-11-12 00:47:36,314 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7380a334 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:47:36, skipping insertion in model container [2023-11-12 00:47:36,314 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:47:36" (3/3) ... [2023-11-12 00:47:36,316 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label49+token_ring.13.cil-1.c [2023-11-12 00:47:36,338 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:47:36,338 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-12 00:47:36,439 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:47:36,447 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;@22937114, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:47:36,447 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 00:47:36,462 INFO L276 IsEmpty]: Start isEmpty. Operand has 1862 states, 1823 states have (on average 1.9467910038398244) internal successors, (3549), 1828 states have internal predecessors, (3549), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2023-11-12 00:47:36,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-12 00:47:36,477 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:36,478 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:47:36,479 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:36,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:36,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1540372945, now seen corresponding path program 1 times [2023-11-12 00:47:36,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:36,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234447118] [2023-11-12 00:47:36,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:36,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:36,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:37,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:47:37,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:37,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234447118] [2023-11-12 00:47:37,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234447118] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:47:37,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:47:37,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:47:37,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986999849] [2023-11-12 00:47:37,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:47:37,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:47:37,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:37,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:47:37,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:47:37,247 INFO L87 Difference]: Start difference. First operand has 1862 states, 1823 states have (on average 1.9467910038398244) internal successors, (3549), 1828 states have internal predecessors, (3549), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2023-11-12 00:47:38,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:38,481 INFO L93 Difference]: Finished difference Result 3919 states and 7545 transitions. [2023-11-12 00:47:38,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:47:38,484 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 71 [2023-11-12 00:47:38,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:38,521 INFO L225 Difference]: With dead ends: 3919 [2023-11-12 00:47:38,521 INFO L226 Difference]: Without dead ends: 2056 [2023-11-12 00:47:38,534 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 [2023-11-12 00:47:38,541 INFO L413 NwaCegarLoop]: 3576 mSDtfsCounter, 3848 mSDsluCounter, 3472 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3848 SdHoareTripleChecker+Valid, 7048 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:38,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3848 Valid, 7048 Invalid, 760 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 00:47:38,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2056 states. [2023-11-12 00:47:38,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2056 to 2055. [2023-11-12 00:47:38,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 1989 states have (on average 1.903469079939668) internal successors, (3786), 1993 states have internal predecessors, (3786), 52 states have call successors, (52), 13 states have call predecessors, (52), 12 states have return successors, (50), 49 states have call predecessors, (50), 50 states have call successors, (50) [2023-11-12 00:47:38,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 3888 transitions. [2023-11-12 00:47:38,719 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 3888 transitions. Word has length 71 [2023-11-12 00:47:38,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:38,720 INFO L495 AbstractCegarLoop]: Abstraction has 2055 states and 3888 transitions. [2023-11-12 00:47:38,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2023-11-12 00:47:38,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 3888 transitions. [2023-11-12 00:47:38,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-12 00:47:38,740 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:38,741 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-12 00:47:38,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:47:38,741 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:38,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:38,743 INFO L85 PathProgramCache]: Analyzing trace with hash -516531322, now seen corresponding path program 1 times [2023-11-12 00:47:38,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:38,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612393194] [2023-11-12 00:47:38,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:38,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:38,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:39,135 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:47:39,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:39,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612393194] [2023-11-12 00:47:39,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612393194] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:47:39,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495189709] [2023-11-12 00:47:39,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:39,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:39,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:47:39,148 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:47:39,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:47:39,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:39,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 1114 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:47:39,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:47:39,645 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-12 00:47:39,646 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:47:39,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495189709] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:47:39,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:47:39,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 00:47:39,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346802100] [2023-11-12 00:47:39,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:47:39,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:47:39,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:39,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:47:39,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:47:39,650 INFO L87 Difference]: Start difference. First operand 2055 states and 3888 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 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) [2023-11-12 00:47:40,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:40,288 INFO L93 Difference]: Finished difference Result 2866 states and 5133 transitions. [2023-11-12 00:47:40,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:47:40,289 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 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 145 [2023-11-12 00:47:40,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:40,310 INFO L225 Difference]: With dead ends: 2866 [2023-11-12 00:47:40,310 INFO L226 Difference]: Without dead ends: 2457 [2023-11-12 00:47:40,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:47:40,315 INFO L413 NwaCegarLoop]: 3387 mSDtfsCounter, 3547 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3547 SdHoareTripleChecker+Valid, 3648 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:40,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3547 Valid, 3648 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:47:40,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2023-11-12 00:47:40,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 2451. [2023-11-12 00:47:40,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2451 states, 2329 states have (on average 1.841562902533276) internal successors, (4289), 2334 states have internal predecessors, (4289), 96 states have call successors, (96), 25 states have call predecessors, (96), 24 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2023-11-12 00:47:40,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2451 states to 2451 states and 4479 transitions. [2023-11-12 00:47:40,412 INFO L78 Accepts]: Start accepts. Automaton has 2451 states and 4479 transitions. Word has length 145 [2023-11-12 00:47:40,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:40,413 INFO L495 AbstractCegarLoop]: Abstraction has 2451 states and 4479 transitions. [2023-11-12 00:47:40,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 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) [2023-11-12 00:47:40,414 INFO L276 IsEmpty]: Start isEmpty. Operand 2451 states and 4479 transitions. [2023-11-12 00:47:40,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-12 00:47:40,418 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:40,418 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-12 00:47:40,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:47:40,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:40,628 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:40,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:40,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1038911736, now seen corresponding path program 1 times [2023-11-12 00:47:40,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:40,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131929244] [2023-11-12 00:47:40,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:40,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:40,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:40,873 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:47:40,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:40,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131929244] [2023-11-12 00:47:40,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131929244] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:47:40,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410012956] [2023-11-12 00:47:40,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:40,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:40,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:47:40,876 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:47:40,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:47:41,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:41,176 INFO L262 TraceCheckSpWp]: Trace formula consists of 1108 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:47:41,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:47:41,286 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 00:47:41,286 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:47:41,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410012956] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:47:41,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:47:41,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 00:47:41,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114735001] [2023-11-12 00:47:41,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:47:41,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:47:41,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:41,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:47:41,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:47:41,290 INFO L87 Difference]: Start difference. First operand 2451 states and 4479 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 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) [2023-11-12 00:47:42,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:42,069 INFO L93 Difference]: Finished difference Result 4048 states and 6926 transitions. [2023-11-12 00:47:42,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:47:42,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 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 145 [2023-11-12 00:47:42,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:42,094 INFO L225 Difference]: With dead ends: 4048 [2023-11-12 00:47:42,094 INFO L226 Difference]: Without dead ends: 3243 [2023-11-12 00:47:42,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:47:42,103 INFO L413 NwaCegarLoop]: 3343 mSDtfsCounter, 3538 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3538 SdHoareTripleChecker+Valid, 3604 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:42,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3538 Valid, 3604 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 00:47:42,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3243 states. [2023-11-12 00:47:42,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3243 to 3235. [2023-11-12 00:47:42,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3235 states, 3003 states have (on average 1.7592407592407593) internal successors, (5283), 3010 states have internal predecessors, (5283), 182 states have call successors, (182), 49 states have call predecessors, (182), 48 states have return successors, (180), 176 states have call predecessors, (180), 180 states have call successors, (180) [2023-11-12 00:47:42,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3235 states to 3235 states and 5645 transitions. [2023-11-12 00:47:42,288 INFO L78 Accepts]: Start accepts. Automaton has 3235 states and 5645 transitions. Word has length 145 [2023-11-12 00:47:42,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:42,289 INFO L495 AbstractCegarLoop]: Abstraction has 3235 states and 5645 transitions. [2023-11-12 00:47:42,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 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) [2023-11-12 00:47:42,289 INFO L276 IsEmpty]: Start isEmpty. Operand 3235 states and 5645 transitions. [2023-11-12 00:47:42,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-12 00:47:42,299 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:42,299 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-12 00:47:42,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:47:42,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:42,509 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:42,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:42,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1910178118, now seen corresponding path program 1 times [2023-11-12 00:47:42,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:42,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086901020] [2023-11-12 00:47:42,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:42,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:42,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:42,786 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:47:42,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:42,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086901020] [2023-11-12 00:47:42,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086901020] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:47:42,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012121256] [2023-11-12 00:47:42,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:42,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:42,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:47:42,790 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:47:42,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:47:43,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:43,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 1102 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:47:43,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:47:43,173 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-12 00:47:43,174 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:47:43,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012121256] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:47:43,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:47:43,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 00:47:43,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712426558] [2023-11-12 00:47:43,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:47:43,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:47:43,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:43,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:47:43,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:47:43,179 INFO L87 Difference]: Start difference. First operand 3235 states and 5645 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 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) [2023-11-12 00:47:43,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:43,887 INFO L93 Difference]: Finished difference Result 6388 states and 10462 transitions. [2023-11-12 00:47:43,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:47:43,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 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 145 [2023-11-12 00:47:43,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:43,925 INFO L225 Difference]: With dead ends: 6388 [2023-11-12 00:47:43,925 INFO L226 Difference]: Without dead ends: 4799 [2023-11-12 00:47:43,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:47:43,938 INFO L413 NwaCegarLoop]: 3365 mSDtfsCounter, 3559 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3559 SdHoareTripleChecker+Valid, 3626 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:43,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3559 Valid, 3626 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:47:43,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4799 states. [2023-11-12 00:47:44,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4799 to 4787. [2023-11-12 00:47:44,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4787 states, 4339 states have (on average 1.6702005070292694) internal successors, (7247), 4350 states have internal predecessors, (7247), 350 states have call successors, (350), 97 states have call predecessors, (350), 96 states have return successors, (348), 340 states have call predecessors, (348), 348 states have call successors, (348) [2023-11-12 00:47:44,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4787 states to 4787 states and 7945 transitions. [2023-11-12 00:47:44,219 INFO L78 Accepts]: Start accepts. Automaton has 4787 states and 7945 transitions. Word has length 145 [2023-11-12 00:47:44,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:44,221 INFO L495 AbstractCegarLoop]: Abstraction has 4787 states and 7945 transitions. [2023-11-12 00:47:44,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 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) [2023-11-12 00:47:44,223 INFO L276 IsEmpty]: Start isEmpty. Operand 4787 states and 7945 transitions. [2023-11-12 00:47:44,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-12 00:47:44,235 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:44,236 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-12 00:47:44,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-12 00:47:44,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:44,443 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:44,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:44,444 INFO L85 PathProgramCache]: Analyzing trace with hash -546248248, now seen corresponding path program 1 times [2023-11-12 00:47:44,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:44,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113944956] [2023-11-12 00:47:44,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:44,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:44,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:44,724 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:47:44,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:44,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113944956] [2023-11-12 00:47:44,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113944956] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:47:44,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040062436] [2023-11-12 00:47:44,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:44,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:44,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:47:44,731 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:47:44,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:47:45,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:45,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 1096 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:47:45,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:47:45,099 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-12 00:47:45,099 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:47:45,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040062436] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:47:45,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:47:45,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 00:47:45,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685781836] [2023-11-12 00:47:45,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:47:45,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:47:45,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:45,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:47:45,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:47:45,109 INFO L87 Difference]: Start difference. First operand 4787 states and 7945 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 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) [2023-11-12 00:47:45,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:45,955 INFO L93 Difference]: Finished difference Result 11020 states and 17434 transitions. [2023-11-12 00:47:45,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:47:45,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 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 145 [2023-11-12 00:47:45,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:46,018 INFO L225 Difference]: With dead ends: 11020 [2023-11-12 00:47:46,018 INFO L226 Difference]: Without dead ends: 7879 [2023-11-12 00:47:46,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:47:46,036 INFO L413 NwaCegarLoop]: 3381 mSDtfsCounter, 3565 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3565 SdHoareTripleChecker+Valid, 3642 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:46,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3565 Valid, 3642 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:47:46,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7879 states. [2023-11-12 00:47:46,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7879 to 7859. [2023-11-12 00:47:46,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7859 states, 6987 states have (on average 1.5925289823958781) internal successors, (11127), 7006 states have internal predecessors, (11127), 678 states have call successors, (678), 193 states have call predecessors, (678), 192 states have return successors, (676), 660 states have call predecessors, (676), 676 states have call successors, (676) [2023-11-12 00:47:46,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7859 states to 7859 states and 12481 transitions. [2023-11-12 00:47:46,654 INFO L78 Accepts]: Start accepts. Automaton has 7859 states and 12481 transitions. Word has length 145 [2023-11-12 00:47:46,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:46,654 INFO L495 AbstractCegarLoop]: Abstraction has 7859 states and 12481 transitions. [2023-11-12 00:47:46,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 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) [2023-11-12 00:47:46,655 INFO L276 IsEmpty]: Start isEmpty. Operand 7859 states and 12481 transitions. [2023-11-12 00:47:46,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-12 00:47:46,671 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:46,672 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-12 00:47:46,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:47:46,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:46,881 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:46,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:46,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1948063542, now seen corresponding path program 1 times [2023-11-12 00:47:46,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:46,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452185761] [2023-11-12 00:47:46,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:46,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:46,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:47,114 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:47:47,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:47,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452185761] [2023-11-12 00:47:47,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452185761] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:47:47,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098481239] [2023-11-12 00:47:47,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:47,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:47,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:47:47,117 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:47:47,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:47:47,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:47,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 1090 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:47:47,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:47:47,445 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-12 00:47:47,445 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:47:47,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098481239] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:47:47,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:47:47,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 00:47:47,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222719805] [2023-11-12 00:47:47,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:47:47,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:47:47,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:47,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:47:47,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:47:47,449 INFO L87 Difference]: Start difference. First operand 7859 states and 12481 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 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) [2023-11-12 00:47:48,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:48,522 INFO L93 Difference]: Finished difference Result 20188 states and 31178 transitions. [2023-11-12 00:47:48,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:47:48,522 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 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 145 [2023-11-12 00:47:48,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:48,600 INFO L225 Difference]: With dead ends: 20188 [2023-11-12 00:47:48,601 INFO L226 Difference]: Without dead ends: 13975 [2023-11-12 00:47:48,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:47:48,629 INFO L413 NwaCegarLoop]: 3325 mSDtfsCounter, 3568 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3568 SdHoareTripleChecker+Valid, 3586 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:48,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3568 Valid, 3586 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:47:48,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13975 states. [2023-11-12 00:47:49,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13975 to 13939. [2023-11-12 00:47:49,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13939 states, 12235 states have (on average 1.5358398038414385) internal successors, (18791), 12270 states have internal predecessors, (18791), 1318 states have call successors, (1318), 385 states have call predecessors, (1318), 384 states have return successors, (1316), 1284 states have call predecessors, (1316), 1316 states have call successors, (1316) [2023-11-12 00:47:49,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13939 states to 13939 states and 21425 transitions. [2023-11-12 00:47:49,282 INFO L78 Accepts]: Start accepts. Automaton has 13939 states and 21425 transitions. Word has length 145 [2023-11-12 00:47:49,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:49,284 INFO L495 AbstractCegarLoop]: Abstraction has 13939 states and 21425 transitions. [2023-11-12 00:47:49,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 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) [2023-11-12 00:47:49,285 INFO L276 IsEmpty]: Start isEmpty. Operand 13939 states and 21425 transitions. [2023-11-12 00:47:49,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-12 00:47:49,318 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:49,318 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-12 00:47:49,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 00:47:49,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:49,526 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:49,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:49,526 INFO L85 PathProgramCache]: Analyzing trace with hash 834499208, now seen corresponding path program 1 times [2023-11-12 00:47:49,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:49,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15770769] [2023-11-12 00:47:49,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:49,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:49,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:49,707 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:47:49,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:49,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15770769] [2023-11-12 00:47:49,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15770769] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:47:49,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586568118] [2023-11-12 00:47:49,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:49,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:49,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:47:49,709 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:47:49,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 00:47:49,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:50,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 1084 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:47:50,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:47:50,083 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-12 00:47:50,084 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:47:50,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586568118] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:47:50,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:47:50,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 00:47:50,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849096827] [2023-11-12 00:47:50,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:47:50,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:47:50,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:50,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:47:50,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:47:50,090 INFO L87 Difference]: Start difference. First operand 13939 states and 21425 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 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) [2023-11-12 00:47:51,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:51,379 INFO L93 Difference]: Finished difference Result 38332 states and 58266 transitions. [2023-11-12 00:47:51,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:47:51,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 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 145 [2023-11-12 00:47:51,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:51,488 INFO L225 Difference]: With dead ends: 38332 [2023-11-12 00:47:51,489 INFO L226 Difference]: Without dead ends: 26039 [2023-11-12 00:47:51,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:47:51,532 INFO L413 NwaCegarLoop]: 3325 mSDtfsCounter, 3541 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3541 SdHoareTripleChecker+Valid, 3586 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:51,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3541 Valid, 3586 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:47:51,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26039 states. [2023-11-12 00:47:52,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26039 to 25971. [2023-11-12 00:47:52,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25971 states, 22635 states have (on average 1.4988734261100067) internal successors, (33927), 22702 states have internal predecessors, (33927), 2566 states have call successors, (2566), 769 states have call predecessors, (2566), 768 states have return successors, (2564), 2500 states have call predecessors, (2564), 2564 states have call successors, (2564) [2023-11-12 00:47:52,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25971 states to 25971 states and 39057 transitions. [2023-11-12 00:47:52,945 INFO L78 Accepts]: Start accepts. Automaton has 25971 states and 39057 transitions. Word has length 145 [2023-11-12 00:47:52,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:52,946 INFO L495 AbstractCegarLoop]: Abstraction has 25971 states and 39057 transitions. [2023-11-12 00:47:52,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 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) [2023-11-12 00:47:52,946 INFO L276 IsEmpty]: Start isEmpty. Operand 25971 states and 39057 transitions. [2023-11-12 00:47:53,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-12 00:47:53,004 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:53,005 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-12 00:47:53,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 00:47:53,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:53,225 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:53,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:53,226 INFO L85 PathProgramCache]: Analyzing trace with hash -680667254, now seen corresponding path program 1 times [2023-11-12 00:47:53,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:53,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196352765] [2023-11-12 00:47:53,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:53,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:53,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:53,474 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:47:53,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:53,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196352765] [2023-11-12 00:47:53,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196352765] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:47:53,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844726870] [2023-11-12 00:47:53,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:53,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:53,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:47:53,476 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:47:53,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fca2a759-e00c-44d3-9830-56e96b3d2a01/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 00:47:53,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:53,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 1078 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:47:53,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:47:53,834 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-12 00:47:53,834 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:47:53,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844726870] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:47:53,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:47:53,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 00:47:53,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412795288] [2023-11-12 00:47:53,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:47:53,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:47:53,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:53,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:47:53,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:47:53,837 INFO L87 Difference]: Start difference. First operand 25971 states and 39057 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 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) [2023-11-12 00:47:55,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:55,873 INFO L93 Difference]: Finished difference Result 74236 states and 111642 transitions. [2023-11-12 00:47:55,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:47:55,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 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 145 [2023-11-12 00:47:55,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:56,206 INFO L225 Difference]: With dead ends: 74236 [2023-11-12 00:47:56,206 INFO L226 Difference]: Without dead ends: 49911 [2023-11-12 00:47:56,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:47:56,261 INFO L413 NwaCegarLoop]: 3325 mSDtfsCounter, 3553 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3553 SdHoareTripleChecker+Valid, 3586 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:56,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3553 Valid, 3586 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:47:56,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49911 states.