./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label40+token_ring.05.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_6ceed1cf-83cd-4e74-a08d-2f01c8453565/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ceed1cf-83cd-4e74-a08d-2f01c8453565/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_6ceed1cf-83cd-4e74-a08d-2f01c8453565/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ceed1cf-83cd-4e74-a08d-2f01c8453565/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label40+token_ring.05.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ceed1cf-83cd-4e74-a08d-2f01c8453565/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_6ceed1cf-83cd-4e74-a08d-2f01c8453565/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 e270b9f7665b1c8abbbdbbd0440b4b4aa4509b75796aa73b96f40d2382c01832 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 20:56:58,123 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 20:56:58,265 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ceed1cf-83cd-4e74-a08d-2f01c8453565/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 20:56:58,274 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 20:56:58,274 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 20:56:58,329 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 20:56:58,330 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 20:56:58,331 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 20:56:58,332 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 20:56:58,337 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 20:56:58,338 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 20:56:58,339 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 20:56:58,340 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 20:56:58,342 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 20:56:58,342 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 20:56:58,343 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 20:56:58,343 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 20:56:58,344 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 20:56:58,344 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 20:56:58,345 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 20:56:58,345 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 20:56:58,346 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 20:56:58,346 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 20:56:58,346 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 20:56:58,347 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 20:56:58,347 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 20:56:58,348 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 20:56:58,349 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 20:56:58,349 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 20:56:58,350 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 20:56:58,351 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 20:56:58,351 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 20:56:58,352 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 20:56:58,352 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 20:56:58,352 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 20:56:58,352 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 20:56:58,353 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 20:56:58,353 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 20:56:58,353 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 20:56:58,353 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 20:56:58,354 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 20:56:58,354 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 20:56:58,354 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_6ceed1cf-83cd-4e74-a08d-2f01c8453565/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ceed1cf-83cd-4e74-a08d-2f01c8453565/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e270b9f7665b1c8abbbdbbd0440b4b4aa4509b75796aa73b96f40d2382c01832 [2023-11-21 20:56:58,681 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 20:56:58,706 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 20:56:58,709 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 20:56:58,710 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 20:56:58,711 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 20:56:58,713 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ceed1cf-83cd-4e74-a08d-2f01c8453565/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/combinations/Problem05_label40+token_ring.05.cil-1.c [2023-11-21 20:57:01,815 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 20:57:02,641 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 20:57:02,643 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ceed1cf-83cd-4e74-a08d-2f01c8453565/sv-benchmarks/c/combinations/Problem05_label40+token_ring.05.cil-1.c [2023-11-21 20:57:02,710 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ceed1cf-83cd-4e74-a08d-2f01c8453565/bin/uautomizer-verify-bycVGegfSx/data/93fb0b2c5/692888cf2cda496ebde4ba541f08286a/FLAG805a9f556 [2023-11-21 20:57:02,727 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ceed1cf-83cd-4e74-a08d-2f01c8453565/bin/uautomizer-verify-bycVGegfSx/data/93fb0b2c5/692888cf2cda496ebde4ba541f08286a [2023-11-21 20:57:02,730 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 20:57:02,731 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 20:57:02,733 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 20:57:02,733 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 20:57:02,739 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 20:57:02,740 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 08:57:02" (1/1) ... [2023-11-21 20:57:02,742 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25bc1f12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:02, skipping insertion in model container [2023-11-21 20:57:02,742 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 08:57:02" (1/1) ... [2023-11-21 20:57:03,077 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 20:57:05,432 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_6ceed1cf-83cd-4e74-a08d-2f01c8453565/sv-benchmarks/c/combinations/Problem05_label40+token_ring.05.cil-1.c[377069,377082] [2023-11-21 20:57:05,474 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_6ceed1cf-83cd-4e74-a08d-2f01c8453565/sv-benchmarks/c/combinations/Problem05_label40+token_ring.05.cil-1.c[383339,383352] [2023-11-21 20:57:05,718 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 20:57:05,733 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 20:57:07,063 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_6ceed1cf-83cd-4e74-a08d-2f01c8453565/sv-benchmarks/c/combinations/Problem05_label40+token_ring.05.cil-1.c[377069,377082] [2023-11-21 20:57:07,075 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_6ceed1cf-83cd-4e74-a08d-2f01c8453565/sv-benchmarks/c/combinations/Problem05_label40+token_ring.05.cil-1.c[383339,383352] [2023-11-21 20:57:07,103 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 20:57:07,193 INFO L206 MainTranslator]: Completed translation [2023-11-21 20:57:07,194 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:07 WrapperNode [2023-11-21 20:57:07,194 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 20:57:07,196 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 20:57:07,196 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 20:57:07,196 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 20:57:07,205 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:07" (1/1) ... [2023-11-21 20:57:07,340 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:07" (1/1) ... [2023-11-21 20:57:07,805 INFO L138 Inliner]: procedures = 54, calls = 56, calls flagged for inlining = 32, calls inlined = 32, statements flattened = 12808 [2023-11-21 20:57:07,806 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 20:57:07,807 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 20:57:07,807 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 20:57:07,807 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 20:57:07,819 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:07" (1/1) ... [2023-11-21 20:57:07,819 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:07" (1/1) ... [2023-11-21 20:57:07,890 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:07" (1/1) ... [2023-11-21 20:57:08,006 INFO L187 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-21 20:57:08,007 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:07" (1/1) ... [2023-11-21 20:57:08,007 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:07" (1/1) ... [2023-11-21 20:57:08,240 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:07" (1/1) ... [2023-11-21 20:57:08,296 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:07" (1/1) ... [2023-11-21 20:57:08,320 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:07" (1/1) ... [2023-11-21 20:57:08,349 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:07" (1/1) ... [2023-11-21 20:57:08,557 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 20:57:08,558 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 20:57:08,558 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 20:57:08,558 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 20:57:08,559 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:07" (1/1) ... [2023-11-21 20:57:08,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 20:57:08,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ceed1cf-83cd-4e74-a08d-2f01c8453565/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:57:08,665 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ceed1cf-83cd-4e74-a08d-2f01c8453565/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 20:57:08,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ceed1cf-83cd-4e74-a08d-2f01c8453565/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 20:57:08,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 20:57:08,776 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-21 20:57:08,776 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-21 20:57:08,776 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-21 20:57:08,791 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-21 20:57:08,792 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-21 20:57:08,792 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-21 20:57:08,792 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-21 20:57:08,792 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-21 20:57:08,792 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-21 20:57:08,792 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-21 20:57:08,792 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-21 20:57:08,792 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-21 20:57:08,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 20:57:08,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 20:57:08,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 20:57:09,001 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 20:57:09,004 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 20:57:19,206 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 20:57:29,159 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 20:57:29,159 INFO L308 CfgBuilder]: Removed 9 assume(true) statements. [2023-11-21 20:57:29,163 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 08:57:29 BoogieIcfgContainer [2023-11-21 20:57:29,163 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 20:57:29,167 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 20:57:29,168 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 20:57:29,172 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 20:57:29,173 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 08:57:02" (1/3) ... [2023-11-21 20:57:29,176 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73d6528a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 08:57:29, skipping insertion in model container [2023-11-21 20:57:29,176 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:07" (2/3) ... [2023-11-21 20:57:29,178 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73d6528a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 08:57:29, skipping insertion in model container [2023-11-21 20:57:29,178 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 08:57:29" (3/3) ... [2023-11-21 20:57:29,179 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label40+token_ring.05.cil-1.c [2023-11-21 20:57:29,203 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 20:57:29,203 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-21 20:57:29,318 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 20:57:29,324 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;@32a45bf3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 20:57:29,325 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-21 20:57:29,336 INFO L276 IsEmpty]: Start isEmpty. Operand has 1760 states, 1732 states have (on average 1.9670900692840647) internal successors, (3407), 1735 states have internal predecessors, (3407), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-11-21 20:57:29,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-21 20:57:29,348 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:57:29,348 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] [2023-11-21 20:57:29,349 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:57:29,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:29,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1405472472, now seen corresponding path program 1 times [2023-11-21 20:57:29,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:57:29,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226721538] [2023-11-21 20:57:29,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:29,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:57:29,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:29,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 20:57:29,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:29,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 20:57:29,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:29,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 20:57:29,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:30,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-21 20:57:30,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:30,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-21 20:57:30,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:30,051 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 20:57:30,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:57:30,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226721538] [2023-11-21 20:57:30,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226721538] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:57:30,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:57:30,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 20:57:30,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815411464] [2023-11-21 20:57:30,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:57:30,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 20:57:30,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:57:30,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 20:57:30,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 20:57:30,123 INFO L87 Difference]: Start difference. First operand has 1760 states, 1732 states have (on average 1.9670900692840647) internal successors, (3407), 1735 states have internal predecessors, (3407), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 20:57:32,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:57:32,214 INFO L93 Difference]: Finished difference Result 3620 states and 7044 transitions. [2023-11-21 20:57:32,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-21 20:57:32,217 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2023-11-21 20:57:32,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:57:32,245 INFO L225 Difference]: With dead ends: 3620 [2023-11-21 20:57:32,245 INFO L226 Difference]: Without dead ends: 1859 [2023-11-21 20:57:32,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-21 20:57:32,259 INFO L413 NwaCegarLoop]: 3249 mSDtfsCounter, 3622 mSDsluCounter, 9503 mSDsCounter, 0 mSdLazyCounter, 1432 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3652 SdHoareTripleChecker+Valid, 12752 SdHoareTripleChecker+Invalid, 1516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-21 20:57:32,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3652 Valid, 12752 Invalid, 1516 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [84 Valid, 1432 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-21 20:57:32,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1859 states. [2023-11-21 20:57:32,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1859 to 1858. [2023-11-21 20:57:32,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1858 states, 1810 states have (on average 1.9392265193370166) internal successors, (3510), 1813 states have internal predecessors, (3510), 34 states have call successors, (34), 12 states have call predecessors, (34), 12 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-21 20:57:32,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1858 states to 1858 states and 3578 transitions. [2023-11-21 20:57:32,466 INFO L78 Accepts]: Start accepts. Automaton has 1858 states and 3578 transitions. Word has length 46 [2023-11-21 20:57:32,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:57:32,468 INFO L495 AbstractCegarLoop]: Abstraction has 1858 states and 3578 transitions. [2023-11-21 20:57:32,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 20:57:32,469 INFO L276 IsEmpty]: Start isEmpty. Operand 1858 states and 3578 transitions. [2023-11-21 20:57:32,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-21 20:57:32,483 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:57:32,484 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:57:32,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 20:57:32,484 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:57:32,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:32,485 INFO L85 PathProgramCache]: Analyzing trace with hash 2031744059, now seen corresponding path program 1 times [2023-11-21 20:57:32,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:57:32,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040251283] [2023-11-21 20:57:32,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:32,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:57:32,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:32,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 20:57:32,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:32,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 20:57:32,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:32,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 20:57:32,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:32,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-21 20:57:32,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:32,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-21 20:57:32,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:32,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-21 20:57:32,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:32,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 20:57:32,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:32,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-21 20:57:32,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:32,975 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 20:57:32,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:57:32,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040251283] [2023-11-21 20:57:32,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040251283] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:57:32,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46457730] [2023-11-21 20:57:32,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:32,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:57:32,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ceed1cf-83cd-4e74-a08d-2f01c8453565/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:57:32,980 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ceed1cf-83cd-4e74-a08d-2f01c8453565/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:57:32,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ceed1cf-83cd-4e74-a08d-2f01c8453565/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 20:57:33,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:33,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 20:57:33,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:57:33,236 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-21 20:57:33,236 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 20:57:33,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46457730] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:57:33,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 20:57:33,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2023-11-21 20:57:33,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102626634] [2023-11-21 20:57:33,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:57:33,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 20:57:33,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:57:33,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 20:57:33,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 20:57:33,242 INFO L87 Difference]: Start difference. First operand 1858 states and 3578 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 20:57:33,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:57:33,825 INFO L93 Difference]: Finished difference Result 2275 states and 4187 transitions. [2023-11-21 20:57:33,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 20:57:33,833 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 88 [2023-11-21 20:57:33,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:57:33,852 INFO L225 Difference]: With dead ends: 2275 [2023-11-21 20:57:33,852 INFO L226 Difference]: Without dead ends: 2063 [2023-11-21 20:57:33,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 20:57:33,859 INFO L413 NwaCegarLoop]: 3231 mSDtfsCounter, 3406 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3406 SdHoareTripleChecker+Valid, 3358 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 20:57:33,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3406 Valid, 3358 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 20:57:33,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2023-11-21 20:57:33,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 2059. [2023-11-21 20:57:33,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2059 states, 1971 states have (on average 1.8959918822932522) internal successors, (3737), 1975 states have internal predecessors, (3737), 62 states have call successors, (62), 24 states have call predecessors, (62), 24 states have return successors, (62), 60 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-21 20:57:33,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2059 states to 2059 states and 3861 transitions. [2023-11-21 20:57:33,978 INFO L78 Accepts]: Start accepts. Automaton has 2059 states and 3861 transitions. Word has length 88 [2023-11-21 20:57:33,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:57:33,979 INFO L495 AbstractCegarLoop]: Abstraction has 2059 states and 3861 transitions. [2023-11-21 20:57:33,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 20:57:33,979 INFO L276 IsEmpty]: Start isEmpty. Operand 2059 states and 3861 transitions. [2023-11-21 20:57:33,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-21 20:57:33,983 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:57:33,983 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:57:34,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ceed1cf-83cd-4e74-a08d-2f01c8453565/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 20:57:34,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ceed1cf-83cd-4e74-a08d-2f01c8453565/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:57:34,205 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:57:34,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:34,206 INFO L85 PathProgramCache]: Analyzing trace with hash 493564409, now seen corresponding path program 1 times [2023-11-21 20:57:34,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:57:34,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562620565] [2023-11-21 20:57:34,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:34,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:57:34,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:34,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 20:57:34,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:34,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 20:57:34,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:34,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 20:57:34,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:34,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-21 20:57:34,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:34,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-21 20:57:34,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:34,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-21 20:57:34,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:34,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 20:57:34,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:34,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-21 20:57:34,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:34,543 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 20:57:34,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:57:34,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562620565] [2023-11-21 20:57:34,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562620565] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:57:34,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248726352] [2023-11-21 20:57:34,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:34,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:57:34,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ceed1cf-83cd-4e74-a08d-2f01c8453565/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:57:34,546 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ceed1cf-83cd-4e74-a08d-2f01c8453565/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:57:34,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ceed1cf-83cd-4e74-a08d-2f01c8453565/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 20:57:34,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:34,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 20:57:34,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:57:34,781 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 20:57:34,782 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 20:57:34,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248726352] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:57:34,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 20:57:34,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2023-11-21 20:57:34,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247699492] [2023-11-21 20:57:34,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:57:34,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 20:57:34,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:57:34,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 20:57:34,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 20:57:34,785 INFO L87 Difference]: Start difference. First operand 2059 states and 3861 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 20:57:35,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:57:35,348 INFO L93 Difference]: Finished difference Result 2872 states and 5040 transitions. [2023-11-21 20:57:35,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 20:57:35,348 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 88 [2023-11-21 20:57:35,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:57:35,366 INFO L225 Difference]: With dead ends: 2872 [2023-11-21 20:57:35,366 INFO L226 Difference]: Without dead ends: 2459 [2023-11-21 20:57:35,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 20:57:35,370 INFO L413 NwaCegarLoop]: 3209 mSDtfsCounter, 3400 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3400 SdHoareTripleChecker+Valid, 3336 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 20:57:35,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3400 Valid, 3336 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 20:57:35,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2023-11-21 20:57:35,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 2453. [2023-11-21 20:57:35,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2453 states, 2287 states have (on average 1.8272846523830346) internal successors, (4179), 2293 states have internal predecessors, (4179), 116 states have call successors, (116), 48 states have call predecessors, (116), 48 states have return successors, (116), 112 states have call predecessors, (116), 116 states have call successors, (116) [2023-11-21 20:57:35,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 4411 transitions. [2023-11-21 20:57:35,499 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 4411 transitions. Word has length 88 [2023-11-21 20:57:35,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:57:35,499 INFO L495 AbstractCegarLoop]: Abstraction has 2453 states and 4411 transitions. [2023-11-21 20:57:35,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 20:57:35,500 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 4411 transitions. [2023-11-21 20:57:35,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-21 20:57:35,503 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:57:35,503 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:57:35,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ceed1cf-83cd-4e74-a08d-2f01c8453565/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 20:57:35,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ceed1cf-83cd-4e74-a08d-2f01c8453565/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:57:35,721 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:57:35,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:35,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1342892489, now seen corresponding path program 1 times [2023-11-21 20:57:35,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:57:35,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349274741] [2023-11-21 20:57:35,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:35,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:57:35,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:35,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 20:57:35,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:35,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 20:57:35,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:35,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 20:57:35,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:36,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-21 20:57:36,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:36,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-21 20:57:36,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:36,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-21 20:57:36,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:36,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 20:57:36,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:36,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-21 20:57:36,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:36,060 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 20:57:36,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:57:36,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349274741] [2023-11-21 20:57:36,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349274741] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:57:36,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678180143] [2023-11-21 20:57:36,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:36,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:57:36,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ceed1cf-83cd-4e74-a08d-2f01c8453565/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:57:36,063 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ceed1cf-83cd-4e74-a08d-2f01c8453565/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:57:36,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ceed1cf-83cd-4e74-a08d-2f01c8453565/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 20:57:36,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:36,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 20:57:36,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:57:36,284 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-21 20:57:36,284 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 20:57:36,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678180143] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:57:36,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 20:57:36,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2023-11-21 20:57:36,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204885334] [2023-11-21 20:57:36,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:57:36,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 20:57:36,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:57:36,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 20:57:36,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 20:57:36,289 INFO L87 Difference]: Start difference. First operand 2453 states and 4411 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 20:57:36,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:57:36,893 INFO L93 Difference]: Finished difference Result 4042 states and 6696 transitions. [2023-11-21 20:57:36,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 20:57:36,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 88 [2023-11-21 20:57:36,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:57:36,915 INFO L225 Difference]: With dead ends: 4042 [2023-11-21 20:57:36,916 INFO L226 Difference]: Without dead ends: 3235 [2023-11-21 20:57:36,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 20:57:36,921 INFO L413 NwaCegarLoop]: 3227 mSDtfsCounter, 3409 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3409 SdHoareTripleChecker+Valid, 3354 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 20:57:36,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3409 Valid, 3354 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 20:57:36,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3235 states. [2023-11-21 20:57:37,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3235 to 3225. [2023-11-21 20:57:37,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3225 states, 2907 states have (on average 1.7334021327829376) internal successors, (5039), 2917 states have internal predecessors, (5039), 220 states have call successors, (220), 96 states have call predecessors, (220), 96 states have return successors, (220), 212 states have call predecessors, (220), 220 states have call successors, (220) [2023-11-21 20:57:37,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3225 states to 3225 states and 5479 transitions. [2023-11-21 20:57:37,237 INFO L78 Accepts]: Start accepts. Automaton has 3225 states and 5479 transitions. Word has length 88 [2023-11-21 20:57:37,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:57:37,238 INFO L495 AbstractCegarLoop]: Abstraction has 3225 states and 5479 transitions. [2023-11-21 20:57:37,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 20:57:37,238 INFO L276 IsEmpty]: Start isEmpty. Operand 3225 states and 5479 transitions. [2023-11-21 20:57:37,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-21 20:57:37,246 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:57:37,246 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:57:37,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ceed1cf-83cd-4e74-a08d-2f01c8453565/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 20:57:37,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ceed1cf-83cd-4e74-a08d-2f01c8453565/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:57:37,460 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:57:37,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:37,460 INFO L85 PathProgramCache]: Analyzing trace with hash 2048202681, now seen corresponding path program 1 times [2023-11-21 20:57:37,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:57:37,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746155388] [2023-11-21 20:57:37,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:37,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:57:37,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:37,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 20:57:37,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:37,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 20:57:37,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:37,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 20:57:37,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:37,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-21 20:57:37,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:37,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-21 20:57:37,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:37,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-21 20:57:37,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:37,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 20:57:37,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:37,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-21 20:57:37,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:37,659 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-21 20:57:37,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:57:37,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746155388] [2023-11-21 20:57:37,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746155388] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:57:37,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:57:37,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 20:57:37,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948558348] [2023-11-21 20:57:37,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:57:37,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 20:57:37,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:57:37,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 20:57:37,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 20:57:37,662 INFO L87 Difference]: Start difference. First operand 3225 states and 5479 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-21 20:57:39,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:57:39,222 INFO L93 Difference]: Finished difference Result 4475 states and 7280 transitions. [2023-11-21 20:57:39,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 20:57:39,223 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 88 [2023-11-21 20:57:39,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:57:39,248 INFO L225 Difference]: With dead ends: 4475 [2023-11-21 20:57:39,249 INFO L226 Difference]: Without dead ends: 3665 [2023-11-21 20:57:39,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-21 20:57:39,254 INFO L413 NwaCegarLoop]: 3222 mSDtfsCounter, 123 mSDsluCounter, 9439 mSDsCounter, 0 mSdLazyCounter, 1214 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 12661 SdHoareTripleChecker+Invalid, 1249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-21 20:57:39,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 12661 Invalid, 1249 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [35 Valid, 1214 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-21 20:57:39,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3665 states. [2023-11-21 20:57:39,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3665 to 3517. [2023-11-21 20:57:39,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3517 states, 3183 states have (on average 1.718818724473767) internal successors, (5471), 3193 states have internal predecessors, (5471), 228 states have call successors, (228), 104 states have call predecessors, (228), 104 states have return successors, (228), 220 states have call predecessors, (228), 228 states have call successors, (228) [2023-11-21 20:57:39,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3517 states to 3517 states and 5927 transitions. [2023-11-21 20:57:39,463 INFO L78 Accepts]: Start accepts. Automaton has 3517 states and 5927 transitions. Word has length 88 [2023-11-21 20:57:39,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:57:39,463 INFO L495 AbstractCegarLoop]: Abstraction has 3517 states and 5927 transitions. [2023-11-21 20:57:39,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-21 20:57:39,464 INFO L276 IsEmpty]: Start isEmpty. Operand 3517 states and 5927 transitions. [2023-11-21 20:57:39,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-11-21 20:57:39,473 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:57:39,474 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:57:39,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 20:57:39,474 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:57:39,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:39,475 INFO L85 PathProgramCache]: Analyzing trace with hash -355274979, now seen corresponding path program 1 times [2023-11-21 20:57:39,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:57:39,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860406215] [2023-11-21 20:57:39,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:39,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:57:39,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:39,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 20:57:39,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:39,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 20:57:39,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:39,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 20:57:39,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:39,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-21 20:57:39,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:39,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-21 20:57:39,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:39,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-21 20:57:39,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:39,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 20:57:39,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:39,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2023-11-21 20:57:39,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:39,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 20:57:39,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:39,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2023-11-21 20:57:39,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:39,721 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-21 20:57:39,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:57:39,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860406215] [2023-11-21 20:57:39,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860406215] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:57:39,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:57:39,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 20:57:39,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707709472] [2023-11-21 20:57:39,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:57:39,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 20:57:39,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:57:39,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 20:57:39,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 20:57:39,724 INFO L87 Difference]: Start difference. First operand 3517 states and 5927 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-21 20:57:41,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:57:41,262 INFO L93 Difference]: Finished difference Result 7186 states and 11204 transitions. [2023-11-21 20:57:41,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 20:57:41,263 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 118 [2023-11-21 20:57:41,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:57:41,299 INFO L225 Difference]: With dead ends: 7186 [2023-11-21 20:57:41,299 INFO L226 Difference]: Without dead ends: 5315 [2023-11-21 20:57:41,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-21 20:57:41,309 INFO L413 NwaCegarLoop]: 3159 mSDtfsCounter, 3483 mSDsluCounter, 6301 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3494 SdHoareTripleChecker+Valid, 9460 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-21 20:57:41,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3494 Valid, 9460 Invalid, 974 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [66 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-21 20:57:41,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5315 states. [2023-11-21 20:57:41,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5315 to 5289. [2023-11-21 20:57:41,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5289 states, 4643 states have (on average 1.6177040706439803) internal successors, (7511), 4661 states have internal predecessors, (7511), 436 states have call successors, (436), 208 states have call predecessors, (436), 208 states have return successors, (436), 420 states have call predecessors, (436), 436 states have call successors, (436) [2023-11-21 20:57:41,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5289 states to 5289 states and 8383 transitions. [2023-11-21 20:57:41,653 INFO L78 Accepts]: Start accepts. Automaton has 5289 states and 8383 transitions. Word has length 118 [2023-11-21 20:57:41,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:57:41,655 INFO L495 AbstractCegarLoop]: Abstraction has 5289 states and 8383 transitions. [2023-11-21 20:57:41,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-21 20:57:41,656 INFO L276 IsEmpty]: Start isEmpty. Operand 5289 states and 8383 transitions. [2023-11-21 20:57:41,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-11-21 20:57:41,668 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:57:41,668 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:57:41,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 20:57:41,668 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:57:41,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:41,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1664022413, now seen corresponding path program 1 times [2023-11-21 20:57:41,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:57:41,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122409906] [2023-11-21 20:57:41,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:41,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:57:41,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:41,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 20:57:41,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:41,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 20:57:41,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:41,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 20:57:41,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:41,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-21 20:57:41,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:41,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-21 20:57:41,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:41,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-21 20:57:41,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:41,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 20:57:41,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:41,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-11-21 20:57:41,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:41,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 20:57:41,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:41,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2023-11-21 20:57:41,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:41,902 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-21 20:57:41,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:57:41,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122409906] [2023-11-21 20:57:41,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122409906] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:57:41,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:57:41,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 20:57:41,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220137570] [2023-11-21 20:57:41,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:57:41,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 20:57:41,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:57:41,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 20:57:41,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 20:57:41,905 INFO L87 Difference]: Start difference. First operand 5289 states and 8383 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-21 20:57:43,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:57:43,941 INFO L93 Difference]: Finished difference Result 12430 states and 18532 transitions. [2023-11-21 20:57:43,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 20:57:43,942 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 118 [2023-11-21 20:57:43,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:57:44,003 INFO L225 Difference]: With dead ends: 12430 [2023-11-21 20:57:44,003 INFO L226 Difference]: Without dead ends: 8787 [2023-11-21 20:57:44,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-21 20:57:44,021 INFO L413 NwaCegarLoop]: 3173 mSDtfsCounter, 3479 mSDsluCounter, 6317 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3490 SdHoareTripleChecker+Valid, 9490 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-21 20:57:44,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3490 Valid, 9490 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-21 20:57:44,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8787 states. [2023-11-21 20:57:44,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8787 to 8737. [2023-11-21 20:57:44,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8737 states, 7483 states have (on average 1.5275958840037418) internal successors, (11431), 7517 states have internal predecessors, (11431), 836 states have call successors, (836), 416 states have call predecessors, (836), 416 states have return successors, (836), 804 states have call predecessors, (836), 836 states have call successors, (836) [2023-11-21 20:57:44,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8737 states to 8737 states and 13103 transitions. [2023-11-21 20:57:44,834 INFO L78 Accepts]: Start accepts. Automaton has 8737 states and 13103 transitions. Word has length 118 [2023-11-21 20:57:44,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:57:44,835 INFO L495 AbstractCegarLoop]: Abstraction has 8737 states and 13103 transitions. [2023-11-21 20:57:44,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-21 20:57:44,836 INFO L276 IsEmpty]: Start isEmpty. Operand 8737 states and 13103 transitions. [2023-11-21 20:57:44,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-21 20:57:44,870 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:57:44,871 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-21 20:57:44,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-21 20:57:44,871 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:57:44,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:44,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1463570969, now seen corresponding path program 1 times [2023-11-21 20:57:44,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:57:44,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774525635] [2023-11-21 20:57:44,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:44,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:57:44,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:45,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 20:57:45,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:45,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 20:57:45,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:45,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 20:57:45,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:45,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-21 20:57:45,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:45,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-21 20:57:45,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:45,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-21 20:57:45,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:45,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 20:57:45,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:45,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-11-21 20:57:45,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:45,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2023-11-21 20:57:45,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:45,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 20:57:45,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:45,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2023-11-21 20:57:45,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:45,174 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-21 20:57:45,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:57:45,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774525635] [2023-11-21 20:57:45,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774525635] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:57:45,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685734417] [2023-11-21 20:57:45,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:45,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:57:45,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ceed1cf-83cd-4e74-a08d-2f01c8453565/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:57:45,180 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ceed1cf-83cd-4e74-a08d-2f01c8453565/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:57:45,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ceed1cf-83cd-4e74-a08d-2f01c8453565/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 20:57:45,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:45,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 20:57:45,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:57:45,413 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-21 20:57:45,413 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 20:57:45,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685734417] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:57:45,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 20:57:45,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-11-21 20:57:45,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6805131] [2023-11-21 20:57:45,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:57:45,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 20:57:45,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:57:45,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 20:57:45,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 20:57:45,416 INFO L87 Difference]: Start difference. First operand 8737 states and 13103 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11)