./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.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_907aba78-4d67-43ff-b0a8-25634c64fb28/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_907aba78-4d67-43ff-b0a8-25634c64fb28/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_907aba78-4d67-43ff-b0a8-25634c64fb28/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_907aba78-4d67-43ff-b0a8-25634c64fb28/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_907aba78-4d67-43ff-b0a8-25634c64fb28/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_907aba78-4d67-43ff-b0a8-25634c64fb28/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 350eaf2863f602bf9d6d43c31d190808a06f274c6c222054e38d4c11a80535eb --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 20:57:36,015 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 20:57:36,133 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_907aba78-4d67-43ff-b0a8-25634c64fb28/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 20:57:36,140 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 20:57:36,141 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 20:57:36,178 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 20:57:36,179 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 20:57:36,180 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 20:57:36,181 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 20:57:36,186 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 20:57:36,186 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 20:57:36,188 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 20:57:36,188 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 20:57:36,190 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 20:57:36,191 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 20:57:36,191 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 20:57:36,192 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 20:57:36,192 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 20:57:36,192 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 20:57:36,193 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 20:57:36,193 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 20:57:36,194 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 20:57:36,194 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 20:57:36,195 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 20:57:36,195 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 20:57:36,195 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 20:57:36,196 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 20:57:36,197 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 20:57:36,197 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 20:57:36,197 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 20:57:36,199 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 20:57:36,199 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 20:57:36,199 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 20:57:36,199 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 20:57:36,200 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 20:57:36,200 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 20:57:36,200 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 20:57:36,200 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 20:57:36,201 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 20:57:36,201 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 20:57:36,201 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 20:57:36,202 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 20:57:36,202 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_907aba78-4d67-43ff-b0a8-25634c64fb28/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_907aba78-4d67-43ff-b0a8-25634c64fb28/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 350eaf2863f602bf9d6d43c31d190808a06f274c6c222054e38d4c11a80535eb [2023-11-21 20:57:36,477 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 20:57:36,506 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 20:57:36,508 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 20:57:36,510 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 20:57:36,510 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 20:57:36,511 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_907aba78-4d67-43ff-b0a8-25634c64fb28/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-1.c [2023-11-21 20:57:39,583 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 20:57:40,353 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 20:57:40,355 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_907aba78-4d67-43ff-b0a8-25634c64fb28/sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-1.c [2023-11-21 20:57:40,416 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_907aba78-4d67-43ff-b0a8-25634c64fb28/bin/uautomizer-verify-bycVGegfSx/data/8bca87028/be4bd9ce0bcc4305b0c7523dcf1e6bfa/FLAG9f192c481 [2023-11-21 20:57:40,431 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_907aba78-4d67-43ff-b0a8-25634c64fb28/bin/uautomizer-verify-bycVGegfSx/data/8bca87028/be4bd9ce0bcc4305b0c7523dcf1e6bfa [2023-11-21 20:57:40,434 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 20:57:40,435 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 20:57:40,437 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 20:57:40,437 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 20:57:40,442 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 20:57:40,443 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 08:57:40" (1/1) ... [2023-11-21 20:57:40,444 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10a0734d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:40, skipping insertion in model container [2023-11-21 20:57:40,445 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 08:57:40" (1/1) ... [2023-11-21 20:57:40,722 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 20:57:43,078 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_907aba78-4d67-43ff-b0a8-25634c64fb28/sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-1.c[380593,380606] [2023-11-21 20:57:43,113 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_907aba78-4d67-43ff-b0a8-25634c64fb28/sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-1.c[383339,383352] [2023-11-21 20:57:43,500 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 20:57:43,515 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 20:57:44,803 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_907aba78-4d67-43ff-b0a8-25634c64fb28/sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-1.c[380593,380606] [2023-11-21 20:57:44,810 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_907aba78-4d67-43ff-b0a8-25634c64fb28/sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-1.c[383339,383352] [2023-11-21 20:57:44,864 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 20:57:44,953 INFO L206 MainTranslator]: Completed translation [2023-11-21 20:57:44,953 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:44 WrapperNode [2023-11-21 20:57:44,954 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 20:57:44,955 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 20:57:44,955 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 20:57:44,955 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 20:57:44,962 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:44" (1/1) ... [2023-11-21 20:57:45,052 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:44" (1/1) ... [2023-11-21 20:57:45,612 INFO L138 Inliner]: procedures = 64, calls = 72, calls flagged for inlining = 41, calls inlined = 41, statements flattened = 13114 [2023-11-21 20:57:45,612 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 20:57:45,613 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 20:57:45,613 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 20:57:45,613 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 20:57:45,627 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:44" (1/1) ... [2023-11-21 20:57:45,628 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:44" (1/1) ... [2023-11-21 20:57:45,714 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:44" (1/1) ... [2023-11-21 20:57:45,812 INFO L187 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-21 20:57:45,813 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:44" (1/1) ... [2023-11-21 20:57:45,813 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:44" (1/1) ... [2023-11-21 20:57:46,126 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:44" (1/1) ... [2023-11-21 20:57:46,190 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:44" (1/1) ... [2023-11-21 20:57:46,222 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:44" (1/1) ... [2023-11-21 20:57:46,312 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:44" (1/1) ... [2023-11-21 20:57:46,406 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 20:57:46,414 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 20:57:46,415 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 20:57:46,415 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 20:57:46,416 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:44" (1/1) ... [2023-11-21 20:57:46,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 20:57:46,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_907aba78-4d67-43ff-b0a8-25634c64fb28/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:57:46,509 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_907aba78-4d67-43ff-b0a8-25634c64fb28/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 20:57:46,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_907aba78-4d67-43ff-b0a8-25634c64fb28/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 20:57:46,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 20:57:46,642 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-21 20:57:46,642 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-21 20:57:46,652 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-21 20:57:46,655 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-21 20:57:46,655 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-21 20:57:46,655 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-21 20:57:46,655 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-11-21 20:57:46,656 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-11-21 20:57:46,656 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-21 20:57:46,656 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-21 20:57:46,656 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-21 20:57:46,656 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-21 20:57:46,657 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-21 20:57:46,657 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-21 20:57:46,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 20:57:46,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 20:57:46,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 20:57:46,967 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 20:57:46,973 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 20:57:56,810 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 20:58:11,176 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 20:58:11,177 INFO L308 CfgBuilder]: Removed 14 assume(true) statements. [2023-11-21 20:58:11,179 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 08:58:11 BoogieIcfgContainer [2023-11-21 20:58:11,179 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 20:58:11,182 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 20:58:11,183 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 20:58:11,188 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 20:58:11,188 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 08:57:40" (1/3) ... [2023-11-21 20:58:11,189 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@249526df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 08:58:11, skipping insertion in model container [2023-11-21 20:58:11,190 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:44" (2/3) ... [2023-11-21 20:58:11,190 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@249526df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 08:58:11, skipping insertion in model container [2023-11-21 20:58:11,191 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 08:58:11" (3/3) ... [2023-11-21 20:58:11,192 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label49+token_ring.10.cil-1.c [2023-11-21 20:58:11,214 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 20:58:11,215 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-21 20:58:11,309 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 20:58:11,316 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;@36e02808, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 20:58:11,317 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-21 20:58:11,330 INFO L276 IsEmpty]: Start isEmpty. Operand has 1826 states, 1790 states have (on average 1.9541899441340782) internal successors, (3498), 1795 states have internal predecessors, (3498), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-21 20:58:11,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-21 20:58:11,349 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:11,351 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:11,351 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:58:11,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:11,359 INFO L85 PathProgramCache]: Analyzing trace with hash -896001101, now seen corresponding path program 1 times [2023-11-21 20:58:11,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:11,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359031057] [2023-11-21 20:58:11,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:11,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:11,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:11,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 20:58:11,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:12,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 20:58:12,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:12,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 20:58:12,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:12,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-11-21 20:58:12,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:12,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-11-21 20:58:12,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:12,287 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 20:58:12,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:12,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359031057] [2023-11-21 20:58:12,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359031057] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:12,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:58:12,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 20:58:12,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367286145] [2023-11-21 20:58:12,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:12,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 20:58:12,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:12,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 20:58:12,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 20:58:12,353 INFO L87 Difference]: Start difference. First operand has 1826 states, 1790 states have (on average 1.9541899441340782) internal successors, (3498), 1795 states have internal predecessors, (3498), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 20:58:15,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:15,570 INFO L93 Difference]: Finished difference Result 3811 states and 7354 transitions. [2023-11-21 20:58:15,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-21 20:58:15,573 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 62 [2023-11-21 20:58:15,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:15,599 INFO L225 Difference]: With dead ends: 3811 [2023-11-21 20:58:15,600 INFO L226 Difference]: Without dead ends: 1984 [2023-11-21 20:58:15,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-21 20:58:15,617 INFO L413 NwaCegarLoop]: 3365 mSDtfsCounter, 3857 mSDsluCounter, 9745 mSDsCounter, 0 mSdLazyCounter, 1780 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3897 SdHoareTripleChecker+Valid, 13110 SdHoareTripleChecker+Invalid, 1888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:15,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3897 Valid, 13110 Invalid, 1888 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [108 Valid, 1780 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-21 20:58:15,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2023-11-21 20:58:15,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1983. [2023-11-21 20:58:15,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1983 states, 1923 states have (on average 1.9167966718668747) internal successors, (3686), 1927 states have internal predecessors, (3686), 46 states have call successors, (46), 13 states have call predecessors, (46), 12 states have return successors, (44), 43 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-21 20:58:15,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1983 states to 1983 states and 3776 transitions. [2023-11-21 20:58:15,824 INFO L78 Accepts]: Start accepts. Automaton has 1983 states and 3776 transitions. Word has length 62 [2023-11-21 20:58:15,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:15,825 INFO L495 AbstractCegarLoop]: Abstraction has 1983 states and 3776 transitions. [2023-11-21 20:58:15,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 20:58:15,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1983 states and 3776 transitions. [2023-11-21 20:58:15,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-21 20:58:15,837 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:15,838 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:58:15,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 20:58:15,838 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:58:15,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:15,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1443875493, now seen corresponding path program 1 times [2023-11-21 20:58:15,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:15,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605708257] [2023-11-21 20:58:15,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:15,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:16,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 20:58:16,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:16,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 20:58:16,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:16,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 20:58:16,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:16,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-11-21 20:58:16,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:16,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-11-21 20:58:16,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:16,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-21 20:58:16,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:16,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 20:58:16,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:16,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-21 20:58:16,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:16,370 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 20:58:16,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:16,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605708257] [2023-11-21 20:58:16,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605708257] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:58:16,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038389285] [2023-11-21 20:58:16,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:16,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:58:16,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_907aba78-4d67-43ff-b0a8-25634c64fb28/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:58:16,375 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_907aba78-4d67-43ff-b0a8-25634c64fb28/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:58:16,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_907aba78-4d67-43ff-b0a8-25634c64fb28/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 20:58:16,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:16,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 20:58:16,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:58:16,751 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-21 20:58:16,751 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 20:58:16,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038389285] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:16,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 20:58:16,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2023-11-21 20:58:16,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560194448] [2023-11-21 20:58:16,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:16,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 20:58:16,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:16,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 20:58:16,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 20:58:16,756 INFO L87 Difference]: Start difference. First operand 1983 states and 3776 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 20:58:17,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:17,507 INFO L93 Difference]: Finished difference Result 2650 states and 4791 transitions. [2023-11-21 20:58:17,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 20:58:17,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 124 [2023-11-21 20:58:17,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:17,530 INFO L225 Difference]: With dead ends: 2650 [2023-11-21 20:58:17,532 INFO L226 Difference]: Without dead ends: 2313 [2023-11-21 20:58:17,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 137 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 20:58:17,538 INFO L413 NwaCegarLoop]: 3335 mSDtfsCounter, 3491 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3491 SdHoareTripleChecker+Valid, 3549 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:17,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3491 Valid, 3549 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-21 20:58:17,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2023-11-21 20:58:17,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 2307. [2023-11-21 20:58:17,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2307 states, 2197 states have (on average 1.86117432862995) internal successors, (4089), 2202 states have internal predecessors, (4089), 84 states have call successors, (84), 25 states have call predecessors, (84), 24 states have return successors, (82), 80 states have call predecessors, (82), 82 states have call successors, (82) [2023-11-21 20:58:17,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2307 states to 2307 states and 4255 transitions. [2023-11-21 20:58:17,682 INFO L78 Accepts]: Start accepts. Automaton has 2307 states and 4255 transitions. Word has length 124 [2023-11-21 20:58:17,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:17,683 INFO L495 AbstractCegarLoop]: Abstraction has 2307 states and 4255 transitions. [2023-11-21 20:58:17,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 20:58:17,683 INFO L276 IsEmpty]: Start isEmpty. Operand 2307 states and 4255 transitions. [2023-11-21 20:58:17,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-21 20:58:17,692 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:17,692 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:58:17,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_907aba78-4d67-43ff-b0a8-25634c64fb28/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 20:58:17,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_907aba78-4d67-43ff-b0a8-25634c64fb28/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:58:17,914 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:58:17,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:17,914 INFO L85 PathProgramCache]: Analyzing trace with hash -877722363, now seen corresponding path program 1 times [2023-11-21 20:58:17,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:17,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396814676] [2023-11-21 20:58:17,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:17,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:17,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:18,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 20:58:18,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:18,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 20:58:18,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:18,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 20:58:18,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:18,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-11-21 20:58:18,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:18,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-11-21 20:58:18,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:18,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-21 20:58:18,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:18,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 20:58:18,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:18,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-21 20:58:18,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:18,436 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 20:58:18,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:18,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396814676] [2023-11-21 20:58:18,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396814676] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:58:18,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360241729] [2023-11-21 20:58:18,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:18,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:58:18,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_907aba78-4d67-43ff-b0a8-25634c64fb28/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:58:18,439 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_907aba78-4d67-43ff-b0a8-25634c64fb28/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:58:18,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_907aba78-4d67-43ff-b0a8-25634c64fb28/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 20:58:18,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:18,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 20:58:18,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:58:18,752 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-21 20:58:18,755 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 20:58:18,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360241729] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:18,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 20:58:18,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2023-11-21 20:58:18,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895031996] [2023-11-21 20:58:18,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:18,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 20:58:18,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:18,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 20:58:18,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 20:58:18,761 INFO L87 Difference]: Start difference. First operand 2307 states and 4255 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 20:58:19,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:19,396 INFO L93 Difference]: Finished difference Result 3616 states and 6242 transitions. [2023-11-21 20:58:19,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 20:58:19,397 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 124 [2023-11-21 20:58:19,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:19,417 INFO L225 Difference]: With dead ends: 3616 [2023-11-21 20:58:19,417 INFO L226 Difference]: Without dead ends: 2955 [2023-11-21 20:58:19,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 137 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 20:58:19,423 INFO L413 NwaCegarLoop]: 3315 mSDtfsCounter, 3509 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3509 SdHoareTripleChecker+Valid, 3529 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:19,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3509 Valid, 3529 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 20:58:19,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2023-11-21 20:58:19,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2947. [2023-11-21 20:58:19,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2947 states, 2739 states have (on average 1.7827674333698431) internal successors, (4883), 2746 states have internal predecessors, (4883), 158 states have call successors, (158), 49 states have call predecessors, (158), 48 states have return successors, (156), 152 states have call predecessors, (156), 156 states have call successors, (156) [2023-11-21 20:58:19,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2947 states to 2947 states and 5197 transitions. [2023-11-21 20:58:19,597 INFO L78 Accepts]: Start accepts. Automaton has 2947 states and 5197 transitions. Word has length 124 [2023-11-21 20:58:19,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:19,597 INFO L495 AbstractCegarLoop]: Abstraction has 2947 states and 5197 transitions. [2023-11-21 20:58:19,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 20:58:19,598 INFO L276 IsEmpty]: Start isEmpty. Operand 2947 states and 5197 transitions. [2023-11-21 20:58:19,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-21 20:58:19,603 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:19,603 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:58:19,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_907aba78-4d67-43ff-b0a8-25634c64fb28/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 20:58:19,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_907aba78-4d67-43ff-b0a8-25634c64fb28/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:58:19,826 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:58:19,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:19,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1905813349, now seen corresponding path program 1 times [2023-11-21 20:58:19,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:19,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192332749] [2023-11-21 20:58:19,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:19,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:19,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:19,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 20:58:19,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:20,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 20:58:20,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:20,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 20:58:20,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:20,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-11-21 20:58:20,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:20,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-11-21 20:58:20,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:20,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-21 20:58:20,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:20,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 20:58:20,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:20,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-21 20:58:20,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:20,315 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 20:58:20,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:20,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192332749] [2023-11-21 20:58:20,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192332749] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:58:20,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243167492] [2023-11-21 20:58:20,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:20,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:58:20,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_907aba78-4d67-43ff-b0a8-25634c64fb28/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:58:20,323 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_907aba78-4d67-43ff-b0a8-25634c64fb28/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:58:20,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_907aba78-4d67-43ff-b0a8-25634c64fb28/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 20:58:20,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:20,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 892 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 20:58:20,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:58:20,621 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-21 20:58:20,621 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 20:58:20,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243167492] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:20,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 20:58:20,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2023-11-21 20:58:20,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889841683] [2023-11-21 20:58:20,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:20,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 20:58:20,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:20,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 20:58:20,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 20:58:20,624 INFO L87 Difference]: Start difference. First operand 2947 states and 5197 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 20:58:21,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:21,278 INFO L93 Difference]: Finished difference Result 5524 states and 9094 transitions. [2023-11-21 20:58:21,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 20:58:21,278 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 124 [2023-11-21 20:58:21,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:21,308 INFO L225 Difference]: With dead ends: 5524 [2023-11-21 20:58:21,308 INFO L226 Difference]: Without dead ends: 4223 [2023-11-21 20:58:21,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 137 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 20:58:21,317 INFO L413 NwaCegarLoop]: 3278 mSDtfsCounter, 3503 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3503 SdHoareTripleChecker+Valid, 3492 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:21,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3503 Valid, 3492 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 20:58:21,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4223 states. [2023-11-21 20:58:21,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4223 to 4211. [2023-11-21 20:58:21,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4211 states, 3811 states have (on average 1.6916819732353714) internal successors, (6447), 3822 states have internal predecessors, (6447), 302 states have call successors, (302), 97 states have call predecessors, (302), 96 states have return successors, (300), 292 states have call predecessors, (300), 300 states have call successors, (300) [2023-11-21 20:58:21,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4211 states to 4211 states and 7049 transitions. [2023-11-21 20:58:21,606 INFO L78 Accepts]: Start accepts. Automaton has 4211 states and 7049 transitions. Word has length 124 [2023-11-21 20:58:21,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:21,606 INFO L495 AbstractCegarLoop]: Abstraction has 4211 states and 7049 transitions. [2023-11-21 20:58:21,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 20:58:21,607 INFO L276 IsEmpty]: Start isEmpty. Operand 4211 states and 7049 transitions. [2023-11-21 20:58:21,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-21 20:58:21,615 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:21,615 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:58:21,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_907aba78-4d67-43ff-b0a8-25634c64fb28/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 20:58:21,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_907aba78-4d67-43ff-b0a8-25634c64fb28/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:58:21,836 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:58:21,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:21,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1856826939, now seen corresponding path program 1 times [2023-11-21 20:58:21,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:21,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095155311] [2023-11-21 20:58:21,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:21,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:21,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:21,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 20:58:21,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:22,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 20:58:22,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:22,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 20:58:22,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:22,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-11-21 20:58:22,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:22,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-11-21 20:58:22,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:22,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-21 20:58:22,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:22,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 20:58:22,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:22,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-21 20:58:22,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:22,258 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 20:58:22,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:22,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095155311] [2023-11-21 20:58:22,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095155311] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:58:22,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978921123] [2023-11-21 20:58:22,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:22,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:58:22,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_907aba78-4d67-43ff-b0a8-25634c64fb28/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:58:22,264 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_907aba78-4d67-43ff-b0a8-25634c64fb28/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:58:22,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_907aba78-4d67-43ff-b0a8-25634c64fb28/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 20:58:22,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:22,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 886 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 20:58:22,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:58:22,548 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-21 20:58:22,548 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 20:58:22,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978921123] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:22,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 20:58:22,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2023-11-21 20:58:22,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613612520] [2023-11-21 20:58:22,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:22,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 20:58:22,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:22,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 20:58:22,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 20:58:22,551 INFO L87 Difference]: Start difference. First operand 4211 states and 7049 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 20:58:23,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:23,349 INFO L93 Difference]: Finished difference Result 9292 states and 14698 transitions. [2023-11-21 20:58:23,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 20:58:23,350 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 124 [2023-11-21 20:58:23,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:23,396 INFO L225 Difference]: With dead ends: 9292 [2023-11-21 20:58:23,396 INFO L226 Difference]: Without dead ends: 6727 [2023-11-21 20:58:23,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 137 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 20:58:23,410 INFO L413 NwaCegarLoop]: 3278 mSDtfsCounter, 3512 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3512 SdHoareTripleChecker+Valid, 3492 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:23,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3512 Valid, 3492 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 20:58:23,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6727 states. [2023-11-21 20:58:24,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6727 to 6707. [2023-11-21 20:58:24,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6707 states, 5931 states have (on average 1.6063058506154106) internal successors, (9527), 5950 states have internal predecessors, (9527), 582 states have call successors, (582), 193 states have call predecessors, (582), 192 states have return successors, (580), 564 states have call predecessors, (580), 580 states have call successors, (580) [2023-11-21 20:58:24,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6707 states to 6707 states and 10689 transitions. [2023-11-21 20:58:24,072 INFO L78 Accepts]: Start accepts. Automaton has 6707 states and 10689 transitions. Word has length 124 [2023-11-21 20:58:24,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:24,073 INFO L495 AbstractCegarLoop]: Abstraction has 6707 states and 10689 transitions. [2023-11-21 20:58:24,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 20:58:24,074 INFO L276 IsEmpty]: Start isEmpty. Operand 6707 states and 10689 transitions. [2023-11-21 20:58:24,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-21 20:58:24,089 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:24,089 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:58:24,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_907aba78-4d67-43ff-b0a8-25634c64fb28/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 20:58:24,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_907aba78-4d67-43ff-b0a8-25634c64fb28/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:58:24,312 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:58:24,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:24,312 INFO L85 PathProgramCache]: Analyzing trace with hash -478014619, now seen corresponding path program 1 times [2023-11-21 20:58:24,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:24,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971055129] [2023-11-21 20:58:24,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:24,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:24,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:24,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 20:58:24,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:24,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 20:58:24,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:24,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 20:58:24,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:24,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-11-21 20:58:24,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:24,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-11-21 20:58:24,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:24,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-21 20:58:24,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:24,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 20:58:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:24,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-21 20:58:24,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:24,824 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 20:58:24,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:24,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971055129] [2023-11-21 20:58:24,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971055129] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:58:24,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117475594] [2023-11-21 20:58:24,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:24,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:58:24,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_907aba78-4d67-43ff-b0a8-25634c64fb28/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:58:24,828 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_907aba78-4d67-43ff-b0a8-25634c64fb28/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:58:24,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_907aba78-4d67-43ff-b0a8-25634c64fb28/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 20:58:25,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:25,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 880 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 20:58:25,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:58:25,135 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-21 20:58:25,136 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 20:58:25,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117475594] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:25,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 20:58:25,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2023-11-21 20:58:25,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056030504] [2023-11-21 20:58:25,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:25,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 20:58:25,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:25,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 20:58:25,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 20:58:25,141 INFO L87 Difference]: Start difference. First operand 6707 states and 10689 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7)