./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.12.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ef48ab-207e-4ca9-b12d-1fe0f1e172a8/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ef48ab-207e-4ca9-b12d-1fe0f1e172a8/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ef48ab-207e-4ca9-b12d-1fe0f1e172a8/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ef48ab-207e-4ca9-b12d-1fe0f1e172a8/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.12.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ef48ab-207e-4ca9-b12d-1fe0f1e172a8/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ef48ab-207e-4ca9-b12d-1fe0f1e172a8/bin/uautomizer-verify-bycVGegfSx --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ad834a4fb5f4154353fe834bdf1b25d8394c06509e997c3a1b1b485e0c0b77f0 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:26:17,606 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:26:17,733 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ef48ab-207e-4ca9-b12d-1fe0f1e172a8/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 22:26:17,738 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:26:17,747 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:26:17,779 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:26:17,780 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:26:17,780 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:26:17,781 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 22:26:17,782 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 22:26:17,782 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:26:17,783 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:26:17,784 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:26:17,785 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:26:17,786 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:26:17,786 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:26:17,787 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 22:26:17,788 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:26:17,788 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:26:17,789 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:26:17,790 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:26:17,791 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 22:26:17,791 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:26:17,792 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 22:26:17,792 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:26:17,793 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 22:26:17,793 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:26:17,794 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:26:17,795 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:26:17,795 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:26:17,796 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:26:17,796 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:26:17,797 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:26:17,798 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:26:17,798 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 22:26:17,799 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:26:17,799 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:26:17,800 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:26:17,800 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:26:17,801 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 22:26:17,801 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:26:17,802 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:26:17,803 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_e1ef48ab-207e-4ca9-b12d-1fe0f1e172a8/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ef48ab-207e-4ca9-b12d-1fe0f1e172a8/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ad834a4fb5f4154353fe834bdf1b25d8394c06509e997c3a1b1b485e0c0b77f0 [2023-11-21 22:26:18,061 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:26:18,096 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:26:18,098 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:26:18,100 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:26:18,103 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:26:18,105 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ef48ab-207e-4ca9-b12d-1fe0f1e172a8/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.12.cil-1.c [2023-11-21 22:26:21,277 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:26:22,108 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:26:22,110 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ef48ab-207e-4ca9-b12d-1fe0f1e172a8/sv-benchmarks/c/combinations/Problem05_label49+token_ring.12.cil-1.c [2023-11-21 22:26:22,172 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ef48ab-207e-4ca9-b12d-1fe0f1e172a8/bin/uautomizer-verify-bycVGegfSx/data/87c4c8c38/9d6bea40e29948ecad5af894f45874ec/FLAG1303ff4f2 [2023-11-21 22:26:22,193 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ef48ab-207e-4ca9-b12d-1fe0f1e172a8/bin/uautomizer-verify-bycVGegfSx/data/87c4c8c38/9d6bea40e29948ecad5af894f45874ec [2023-11-21 22:26:22,196 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:26:22,199 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:26:22,200 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:26:22,201 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:26:22,207 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:26:22,208 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:26:22" (1/1) ... [2023-11-21 22:26:22,210 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31c3ce03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:22, skipping insertion in model container [2023-11-21 22:26:22,210 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:26:22" (1/1) ... [2023-11-21 22:26:22,541 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:26:24,932 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_e1ef48ab-207e-4ca9-b12d-1fe0f1e172a8/sv-benchmarks/c/combinations/Problem05_label49+token_ring.12.cil-1.c[380593,380606] [2023-11-21 22:26:24,971 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_e1ef48ab-207e-4ca9-b12d-1fe0f1e172a8/sv-benchmarks/c/combinations/Problem05_label49+token_ring.12.cil-1.c[383339,383352] [2023-11-21 22:26:25,400 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:26:25,417 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:26:26,696 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_e1ef48ab-207e-4ca9-b12d-1fe0f1e172a8/sv-benchmarks/c/combinations/Problem05_label49+token_ring.12.cil-1.c[380593,380606] [2023-11-21 22:26:26,703 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_e1ef48ab-207e-4ca9-b12d-1fe0f1e172a8/sv-benchmarks/c/combinations/Problem05_label49+token_ring.12.cil-1.c[383339,383352] [2023-11-21 22:26:26,746 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:26:26,830 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:26:26,831 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:26 WrapperNode [2023-11-21 22:26:26,831 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:26:26,832 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:26:26,832 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:26:26,833 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:26:26,841 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:26" (1/1) ... [2023-11-21 22:26:26,964 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:26" (1/1) ... [2023-11-21 22:26:27,662 INFO L138 Inliner]: procedures = 68, calls = 78, calls flagged for inlining = 45, calls inlined = 45, statements flattened = 13234 [2023-11-21 22:26:27,662 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:26:27,663 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:26:27,663 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:26:27,663 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:26:27,691 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:26" (1/1) ... [2023-11-21 22:26:27,691 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:26" (1/1) ... [2023-11-21 22:26:27,843 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:26" (1/1) ... [2023-11-21 22:26:27,974 INFO L187 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-21 22:26:27,974 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:26" (1/1) ... [2023-11-21 22:26:27,974 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:26" (1/1) ... [2023-11-21 22:26:28,334 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:26" (1/1) ... [2023-11-21 22:26:28,388 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:26" (1/1) ... [2023-11-21 22:26:28,414 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:26" (1/1) ... [2023-11-21 22:26:28,478 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:26" (1/1) ... [2023-11-21 22:26:28,548 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:26:28,550 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:26:28,551 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:26:28,551 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:26:28,552 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:26" (1/1) ... [2023-11-21 22:26:28,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:26:28,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ef48ab-207e-4ca9-b12d-1fe0f1e172a8/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:26:28,589 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ef48ab-207e-4ca9-b12d-1fe0f1e172a8/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:26:28,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ef48ab-207e-4ca9-b12d-1fe0f1e172a8/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:26:28,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:26:28,637 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-21 22:26:28,638 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-21 22:26:28,638 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-21 22:26:28,638 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-21 22:26:28,638 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-21 22:26:28,638 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-21 22:26:28,639 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-11-21 22:26:28,639 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-11-21 22:26:28,639 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-21 22:26:28,639 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-21 22:26:28,640 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-21 22:26:28,640 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-21 22:26:28,640 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-21 22:26:28,640 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-21 22:26:28,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 22:26:28,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:26:28,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:26:28,809 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:26:28,811 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:26:39,415 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:26:54,413 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:26:54,414 INFO L308 CfgBuilder]: Removed 16 assume(true) statements. [2023-11-21 22:26:54,417 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:26:54 BoogieIcfgContainer [2023-11-21 22:26:54,417 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:26:54,421 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:26:54,422 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:26:54,426 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:26:54,427 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:26:22" (1/3) ... [2023-11-21 22:26:54,428 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@368f958c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:26:54, skipping insertion in model container [2023-11-21 22:26:54,428 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:26" (2/3) ... [2023-11-21 22:26:54,429 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@368f958c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:26:54, skipping insertion in model container [2023-11-21 22:26:54,429 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:26:54" (3/3) ... [2023-11-21 22:26:54,431 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label49+token_ring.12.cil-1.c [2023-11-21 22:26:54,459 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:26:54,459 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-21 22:26:54,606 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:26:54,615 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=PETRI_NET, 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;@654ceca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:26:54,616 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-21 22:26:54,631 INFO L276 IsEmpty]: Start isEmpty. Operand has 1850 states, 1812 states have (on average 1.9492273730684326) internal successors, (3532), 1817 states have internal predecessors, (3532), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2023-11-21 22:26:54,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-21 22:26:54,650 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:26:54,651 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] [2023-11-21 22:26:54,652 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:26:54,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:26:54,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1200109113, now seen corresponding path program 1 times [2023-11-21 22:26:54,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:26:54,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232633116] [2023-11-21 22:26:54,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:54,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:26:54,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:55,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:26:55,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:55,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:26:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:55,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:26:55,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:55,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-11-21 22:26:55,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:55,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-21 22:26:55,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:55,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:26:55,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:26:55,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232633116] [2023-11-21 22:26:55,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232633116] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:26:55,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:26:55,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 22:26:55,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26664420] [2023-11-21 22:26:55,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:26:55,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:26:55,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:26:55,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:26:55,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:26:55,913 INFO L87 Difference]: Start difference. First operand has 1850 states, 1812 states have (on average 1.9492273730684326) internal successors, (3532), 1817 states have internal predecessors, (3532), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 22:27:00,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:27:00,313 INFO L93 Difference]: Finished difference Result 3883 states and 7470 transitions. [2023-11-21 22:27:00,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-21 22:27:00,316 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (6), 4 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 68 [2023-11-21 22:27:00,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:27:00,353 INFO L225 Difference]: With dead ends: 3883 [2023-11-21 22:27:00,353 INFO L226 Difference]: Without dead ends: 2032 [2023-11-21 22:27:00,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-21 22:27:00,378 INFO L413 NwaCegarLoop]: 3409 mSDtfsCounter, 3947 mSDsluCounter, 9837 mSDsCounter, 0 mSdLazyCounter, 1916 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3991 SdHoareTripleChecker+Valid, 13246 SdHoareTripleChecker+Invalid, 2032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:27:00,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3991 Valid, 13246 Invalid, 2032 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [116 Valid, 1916 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-21 22:27:00,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2023-11-21 22:27:00,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 2031. [2023-11-21 22:27:00,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 1967 states have (on average 1.9084900864260295) internal successors, (3754), 1971 states have internal predecessors, (3754), 50 states have call successors, (50), 13 states have call predecessors, (50), 12 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2023-11-21 22:27:00,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 3852 transitions. [2023-11-21 22:27:00,579 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 3852 transitions. Word has length 68 [2023-11-21 22:27:00,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:27:00,580 INFO L495 AbstractCegarLoop]: Abstraction has 2031 states and 3852 transitions. [2023-11-21 22:27:00,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 22:27:00,580 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 3852 transitions. [2023-11-21 22:27:00,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-21 22:27:00,590 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:27:00,590 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:27:00,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:27:00,591 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:27:00,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:27:00,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1104405701, now seen corresponding path program 1 times [2023-11-21 22:27:00,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:27:00,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003592332] [2023-11-21 22:27:00,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:27:00,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:27:00,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:27:00,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:27:00,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:27:00,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:27:00,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:27:00,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:27:01,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:27:01,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-11-21 22:27:01,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:27:01,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-21 22:27:01,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:27:01,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2023-11-21 22:27:01,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:27:01,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 22:27:01,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:27:01,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2023-11-21 22:27:01,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:27:01,324 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 22:27:01,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:27:01,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003592332] [2023-11-21 22:27:01,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003592332] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:27:01,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343541812] [2023-11-21 22:27:01,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:27:01,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:27:01,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ef48ab-207e-4ca9-b12d-1fe0f1e172a8/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:27:01,328 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ef48ab-207e-4ca9-b12d-1fe0f1e172a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:27:01,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ef48ab-207e-4ca9-b12d-1fe0f1e172a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:27:01,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:27:01,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 22:27:01,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:27:01,789 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-21 22:27:01,789 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:27:01,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343541812] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:27:01,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:27:01,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2023-11-21 22:27:01,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124910546] [2023-11-21 22:27:01,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:27:01,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:27:01,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:27:01,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:27:01,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:27:01,794 INFO L87 Difference]: Start difference. First operand 2031 states and 3852 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 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) [2023-11-21 22:27:02,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:27:02,737 INFO L93 Difference]: Finished difference Result 2794 states and 5023 transitions. [2023-11-21 22:27:02,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:27:02,738 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 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 138 [2023-11-21 22:27:02,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:27:02,758 INFO L225 Difference]: With dead ends: 2794 [2023-11-21 22:27:02,759 INFO L226 Difference]: Without dead ends: 2409 [2023-11-21 22:27:02,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:27:02,763 INFO L413 NwaCegarLoop]: 3371 mSDtfsCounter, 3529 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3529 SdHoareTripleChecker+Valid, 3617 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-21 22:27:02,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3529 Valid, 3617 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-21 22:27:02,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2409 states. [2023-11-21 22:27:02,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2409 to 2403. [2023-11-21 22:27:02,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2403 states, 2285 states have (on average 1.8490153172866521) internal successors, (4225), 2290 states have internal predecessors, (4225), 92 states have call successors, (92), 25 states have call predecessors, (92), 24 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2023-11-21 22:27:02,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2403 states to 2403 states and 4407 transitions. [2023-11-21 22:27:02,896 INFO L78 Accepts]: Start accepts. Automaton has 2403 states and 4407 transitions. Word has length 138 [2023-11-21 22:27:02,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:27:02,899 INFO L495 AbstractCegarLoop]: Abstraction has 2403 states and 4407 transitions. [2023-11-21 22:27:02,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 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) [2023-11-21 22:27:02,900 INFO L276 IsEmpty]: Start isEmpty. Operand 2403 states and 4407 transitions. [2023-11-21 22:27:02,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-21 22:27:02,910 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:27:02,911 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:27:02,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ef48ab-207e-4ca9-b12d-1fe0f1e172a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 22:27:03,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ef48ab-207e-4ca9-b12d-1fe0f1e172a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:27:03,127 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:27:03,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:27:03,127 INFO L85 PathProgramCache]: Analyzing trace with hash -208932261, now seen corresponding path program 1 times [2023-11-21 22:27:03,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:27:03,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700754216] [2023-11-21 22:27:03,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:27:03,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:27:03,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:27:03,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:27:03,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:27:03,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:27:03,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:27:03,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:27:03,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:27:03,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-11-21 22:27:03,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:27:03,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-21 22:27:03,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:27:03,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2023-11-21 22:27:03,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:27:03,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 22:27:03,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:27:03,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2023-11-21 22:27:03,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:27:03,738 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 22:27:03,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:27:03,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700754216] [2023-11-21 22:27:03,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700754216] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:27:03,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419295813] [2023-11-21 22:27:03,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:27:03,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:27:03,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ef48ab-207e-4ca9-b12d-1fe0f1e172a8/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:27:03,755 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ef48ab-207e-4ca9-b12d-1fe0f1e172a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:27:03,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ef48ab-207e-4ca9-b12d-1fe0f1e172a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:27:04,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:27:04,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 1042 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 22:27:04,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:27:04,145 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-21 22:27:04,150 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:27:04,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419295813] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:27:04,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:27:04,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2023-11-21 22:27:04,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27734706] [2023-11-21 22:27:04,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:27:04,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:27:04,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:27:04,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:27:04,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:27:04,158 INFO L87 Difference]: Start difference. First operand 2403 states and 4407 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 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) [2023-11-21 22:27:04,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:27:04,946 INFO L93 Difference]: Finished difference Result 3904 states and 6706 transitions. [2023-11-21 22:27:04,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:27:04,948 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 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 138 [2023-11-21 22:27:04,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:27:04,976 INFO L225 Difference]: With dead ends: 3904 [2023-11-21 22:27:04,977 INFO L226 Difference]: Without dead ends: 3147 [2023-11-21 22:27:04,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:27:04,989 INFO L413 NwaCegarLoop]: 3351 mSDtfsCounter, 3547 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3547 SdHoareTripleChecker+Valid, 3597 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:27:04,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3547 Valid, 3597 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 22:27:04,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3147 states. [2023-11-21 22:27:05,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3147 to 3139. [2023-11-21 22:27:05,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3139 states, 2915 states have (on average 1.7684391080617496) internal successors, (5155), 2922 states have internal predecessors, (5155), 174 states have call successors, (174), 49 states have call predecessors, (174), 48 states have return successors, (172), 168 states have call predecessors, (172), 172 states have call successors, (172) [2023-11-21 22:27:05,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3139 states to 3139 states and 5501 transitions. [2023-11-21 22:27:05,244 INFO L78 Accepts]: Start accepts. Automaton has 3139 states and 5501 transitions. Word has length 138 [2023-11-21 22:27:05,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:27:05,245 INFO L495 AbstractCegarLoop]: Abstraction has 3139 states and 5501 transitions. [2023-11-21 22:27:05,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 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) [2023-11-21 22:27:05,246 INFO L276 IsEmpty]: Start isEmpty. Operand 3139 states and 5501 transitions. [2023-11-21 22:27:05,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-21 22:27:05,254 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:27:05,254 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:27:05,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ef48ab-207e-4ca9-b12d-1fe0f1e172a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 22:27:05,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1ef48ab-207e-4ca9-b12d-1fe0f1e172a8/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:27:05,471 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:27:05,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:27:05,471 INFO L85 PathProgramCache]: Analyzing trace with hash -57654917, now seen corresponding path program 1 times [2023-11-21 22:27:05,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:27:05,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213770280] [2023-11-21 22:27:05,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:27:05,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:27:05,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:27:05,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:27:05,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:27:05,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:27:05,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:27:05,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:27:05,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat