./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.05.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74b4fee-d95e-444e-b8d6-f857a88884e4/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74b4fee-d95e-444e-b8d6-f857a88884e4/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_c74b4fee-d95e-444e-b8d6-f857a88884e4/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74b4fee-d95e-444e-b8d6-f857a88884e4/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.05.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74b4fee-d95e-444e-b8d6-f857a88884e4/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_c74b4fee-d95e-444e-b8d6-f857a88884e4/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 52ae6c88c77f2a2d1ba84720becde4fbcf955211b08c092cae514b34c6358b12 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:11:48,307 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:11:48,446 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74b4fee-d95e-444e-b8d6-f857a88884e4/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 22:11:48,455 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:11:48,456 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:11:48,495 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:11:48,496 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:11:48,497 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:11:48,498 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 22:11:48,499 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 22:11:48,499 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:11:48,500 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:11:48,501 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:11:48,501 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:11:48,502 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:11:48,503 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:11:48,503 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 22:11:48,504 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:11:48,504 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:11:48,505 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:11:48,505 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:11:48,506 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 22:11:48,507 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:11:48,507 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 22:11:48,507 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:11:48,508 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 22:11:48,508 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:11:48,509 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:11:48,509 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:11:48,510 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:11:48,511 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:11:48,512 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:11:48,512 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:11:48,512 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:11:48,512 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 22:11:48,513 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:11:48,513 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:11:48,513 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:11:48,514 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:11:48,514 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 22:11:48,514 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:11:48,514 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:11:48,515 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_c74b4fee-d95e-444e-b8d6-f857a88884e4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74b4fee-d95e-444e-b8d6-f857a88884e4/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52ae6c88c77f2a2d1ba84720becde4fbcf955211b08c092cae514b34c6358b12 [2023-11-21 22:11:48,892 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:11:48,929 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:11:48,933 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:11:48,935 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:11:48,935 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:11:48,937 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74b4fee-d95e-444e-b8d6-f857a88884e4/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.05.cil-2.c [2023-11-21 22:11:52,147 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:11:53,143 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:11:53,145 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74b4fee-d95e-444e-b8d6-f857a88884e4/sv-benchmarks/c/combinations/Problem05_label42+token_ring.05.cil-2.c [2023-11-21 22:11:53,233 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74b4fee-d95e-444e-b8d6-f857a88884e4/bin/uautomizer-verify-bycVGegfSx/data/a96f1d709/74cd1ec0a8c942a6b5deee40524693b1/FLAG797c04aa5 [2023-11-21 22:11:53,255 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74b4fee-d95e-444e-b8d6-f857a88884e4/bin/uautomizer-verify-bycVGegfSx/data/a96f1d709/74cd1ec0a8c942a6b5deee40524693b1 [2023-11-21 22:11:53,258 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:11:53,260 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:11:53,262 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:11:53,262 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:11:53,269 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:11:53,270 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:11:53" (1/1) ... [2023-11-21 22:11:53,271 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6918ed92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:11:53, skipping insertion in model container [2023-11-21 22:11:53,271 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:11:53" (1/1) ... [2023-11-21 22:11:53,576 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:11:56,176 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_c74b4fee-d95e-444e-b8d6-f857a88884e4/sv-benchmarks/c/combinations/Problem05_label42+token_ring.05.cil-2.c[378560,378573] [2023-11-21 22:11:56,223 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_c74b4fee-d95e-444e-b8d6-f857a88884e4/sv-benchmarks/c/combinations/Problem05_label42+token_ring.05.cil-2.c[383339,383352] [2023-11-21 22:11:56,497 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:11:56,515 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:11:57,830 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_c74b4fee-d95e-444e-b8d6-f857a88884e4/sv-benchmarks/c/combinations/Problem05_label42+token_ring.05.cil-2.c[378560,378573] [2023-11-21 22:11:57,848 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_c74b4fee-d95e-444e-b8d6-f857a88884e4/sv-benchmarks/c/combinations/Problem05_label42+token_ring.05.cil-2.c[383339,383352] [2023-11-21 22:11:57,867 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:11:58,000 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:11:58,000 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:11:58 WrapperNode [2023-11-21 22:11:58,001 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:11:58,002 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:11:58,002 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:11:58,002 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:11:58,011 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:11:58" (1/1) ... [2023-11-21 22:11:58,154 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:11:58" (1/1) ... [2023-11-21 22:11:58,798 INFO L138 Inliner]: procedures = 54, calls = 57, calls flagged for inlining = 31, calls inlined = 31, statements flattened = 12814 [2023-11-21 22:11:58,799 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:11:58,800 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:11:58,800 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:11:58,800 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:11:58,816 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:11:58" (1/1) ... [2023-11-21 22:11:58,829 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:11:58" (1/1) ... [2023-11-21 22:11:58,963 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:11:58" (1/1) ... [2023-11-21 22:11:59,102 INFO L187 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-21 22:11:59,102 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:11:58" (1/1) ... [2023-11-21 22:11:59,103 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:11:58" (1/1) ... [2023-11-21 22:11:59,499 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:11:58" (1/1) ... [2023-11-21 22:11:59,657 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:11:58" (1/1) ... [2023-11-21 22:11:59,715 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:11:58" (1/1) ... [2023-11-21 22:11:59,752 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:11:58" (1/1) ... [2023-11-21 22:11:59,822 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:11:59,823 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:11:59,824 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:11:59,825 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:11:59,826 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:11:58" (1/1) ... [2023-11-21 22:11:59,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:11:59,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74b4fee-d95e-444e-b8d6-f857a88884e4/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:11:59,872 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74b4fee-d95e-444e-b8d6-f857a88884e4/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:11:59,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74b4fee-d95e-444e-b8d6-f857a88884e4/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:11:59,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:11:59,934 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-21 22:11:59,934 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-21 22:11:59,934 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-21 22:11:59,935 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-21 22:11:59,935 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-21 22:11:59,935 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-21 22:11:59,935 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-11-21 22:11:59,936 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-11-21 22:11:59,936 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-21 22:11:59,936 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-21 22:11:59,937 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-21 22:11:59,937 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-21 22:11:59,938 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-21 22:11:59,938 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-21 22:11:59,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 22:11:59,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:11:59,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:12:00,125 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:12:00,129 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:12:10,694 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:12:28,738 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:12:28,738 INFO L308 CfgBuilder]: Removed 9 assume(true) statements. [2023-11-21 22:12:28,741 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:12:28 BoogieIcfgContainer [2023-11-21 22:12:28,741 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:12:28,743 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:12:28,744 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:12:28,747 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:12:28,747 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:11:53" (1/3) ... [2023-11-21 22:12:28,748 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bd0616a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:12:28, skipping insertion in model container [2023-11-21 22:12:28,748 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:11:58" (2/3) ... [2023-11-21 22:12:28,748 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bd0616a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:12:28, skipping insertion in model container [2023-11-21 22:12:28,749 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:12:28" (3/3) ... [2023-11-21 22:12:28,750 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label42+token_ring.05.cil-2.c [2023-11-21 22:12:28,771 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:12:28,772 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-21 22:12:28,869 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:12:28,876 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;@234ffe6d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:12:28,876 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-21 22:12:28,891 INFO L276 IsEmpty]: Start isEmpty. Operand has 1766 states, 1735 states have (on average 1.9671469740634007) internal successors, (3413), 1740 states have internal predecessors, (3413), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-21 22:12:28,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-21 22:12:28,908 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:12:28,909 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] [2023-11-21 22:12:28,909 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:12:28,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:12:28,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1566358632, now seen corresponding path program 1 times [2023-11-21 22:12:28,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:12:28,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298560911] [2023-11-21 22:12:28,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:12:28,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:12:29,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:29,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:12:29,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:29,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:12:29,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:29,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:12:29,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:29,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-21 22:12:29,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:29,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-21 22:12:29,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:29,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:12:29,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:12:29,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298560911] [2023-11-21 22:12:29,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298560911] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:12:29,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:12:29,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 22:12:29,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379035422] [2023-11-21 22:12:29,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:12:29,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:12:29,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:12:29,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:12:29,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:12:29,701 INFO L87 Difference]: Start difference. First operand has 1766 states, 1735 states have (on average 1.9671469740634007) internal successors, (3413), 1740 states have internal predecessors, (3413), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 22:12:32,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:12:32,031 INFO L93 Difference]: Finished difference Result 3631 states and 7064 transitions. [2023-11-21 22:12:32,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-21 22:12:32,035 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, (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 47 [2023-11-21 22:12:32,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:12:32,071 INFO L225 Difference]: With dead ends: 3631 [2023-11-21 22:12:32,071 INFO L226 Difference]: Without dead ends: 1864 [2023-11-21 22:12:32,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-21 22:12:32,085 INFO L413 NwaCegarLoop]: 3255 mSDtfsCounter, 3632 mSDsluCounter, 9515 mSDsCounter, 0 mSdLazyCounter, 1440 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3662 SdHoareTripleChecker+Valid, 12770 SdHoareTripleChecker+Invalid, 1528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-21 22:12:32,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3662 Valid, 12770 Invalid, 1528 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [88 Valid, 1440 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-21 22:12:32,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2023-11-21 22:12:32,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1863. [2023-11-21 22:12:32,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1813 states have (on average 1.939327082184225) internal successors, (3516), 1817 states have internal predecessors, (3516), 36 states have call successors, (36), 13 states have call predecessors, (36), 12 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-21 22:12:32,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 3586 transitions. [2023-11-21 22:12:32,260 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 3586 transitions. Word has length 47 [2023-11-21 22:12:32,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:12:32,261 INFO L495 AbstractCegarLoop]: Abstraction has 1863 states and 3586 transitions. [2023-11-21 22:12:32,262 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 22:12:32,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 3586 transitions. [2023-11-21 22:12:32,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-21 22:12:32,269 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:12:32,270 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, 1] [2023-11-21 22:12:32,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:12:32,270 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:12:32,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:12:32,271 INFO L85 PathProgramCache]: Analyzing trace with hash -648450181, now seen corresponding path program 1 times [2023-11-21 22:12:32,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:12:32,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034678773] [2023-11-21 22:12:32,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:12:32,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:12:32,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:32,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:12:32,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:32,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:12:32,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:32,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:12:32,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:32,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-21 22:12:32,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:32,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-21 22:12:32,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:32,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-21 22:12:32,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:32,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 22:12:32,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:32,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-21 22:12:32,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:32,752 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 22:12:32,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:12:32,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034678773] [2023-11-21 22:12:32,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034678773] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:12:32,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727777312] [2023-11-21 22:12:32,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:12:32,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:12:32,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74b4fee-d95e-444e-b8d6-f857a88884e4/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:12:32,757 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74b4fee-d95e-444e-b8d6-f857a88884e4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:12:32,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74b4fee-d95e-444e-b8d6-f857a88884e4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:12:32,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:32,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 22:12:32,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:12:33,026 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 22:12:33,026 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:12:33,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727777312] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:12:33,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:12:33,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2023-11-21 22:12:33,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160807293] [2023-11-21 22:12:33,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:12:33,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:12:33,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:12:33,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:12:33,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:12:33,032 INFO L87 Difference]: Start difference. First operand 1863 states and 3586 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 22:12:33,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:12:33,835 INFO L93 Difference]: Finished difference Result 2290 states and 4211 transitions. [2023-11-21 22:12:33,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:12:33,836 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, (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 89 [2023-11-21 22:12:33,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:12:33,859 INFO L225 Difference]: With dead ends: 2290 [2023-11-21 22:12:33,859 INFO L226 Difference]: Without dead ends: 2073 [2023-11-21 22:12:33,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 102 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 22:12:33,864 INFO L413 NwaCegarLoop]: 3245 mSDtfsCounter, 3414 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3414 SdHoareTripleChecker+Valid, 3379 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:12:33,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3414 Valid, 3379 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 22:12:33,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2073 states. [2023-11-21 22:12:33,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2073 to 2067. [2023-11-21 22:12:33,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2067 states, 1977 states have (on average 1.8963075366717248) internal successors, (3749), 1982 states have internal predecessors, (3749), 64 states have call successors, (64), 25 states have call predecessors, (64), 24 states have return successors, (62), 60 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-21 22:12:33,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 3875 transitions. [2023-11-21 22:12:33,997 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 3875 transitions. Word has length 89 [2023-11-21 22:12:33,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:12:33,998 INFO L495 AbstractCegarLoop]: Abstraction has 2067 states and 3875 transitions. [2023-11-21 22:12:33,998 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 22:12:33,998 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 3875 transitions. [2023-11-21 22:12:34,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-21 22:12:34,003 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:12:34,003 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, 1] [2023-11-21 22:12:34,026 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74b4fee-d95e-444e-b8d6-f857a88884e4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-21 22:12:34,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74b4fee-d95e-444e-b8d6-f857a88884e4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:12:34,226 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:12:34,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:12:34,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1087379075, now seen corresponding path program 1 times [2023-11-21 22:12:34,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:12:34,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376370629] [2023-11-21 22:12:34,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:12:34,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:12:34,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:34,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:12:34,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:34,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:12:34,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:34,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:12:34,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:34,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-21 22:12:34,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:34,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-21 22:12:34,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:34,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-21 22:12:34,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:34,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 22:12:34,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:34,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-21 22:12:34,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:34,665 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 22:12:34,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:12:34,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376370629] [2023-11-21 22:12:34,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376370629] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:12:34,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324922893] [2023-11-21 22:12:34,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:12:34,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:12:34,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74b4fee-d95e-444e-b8d6-f857a88884e4/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:12:34,669 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74b4fee-d95e-444e-b8d6-f857a88884e4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:12:34,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74b4fee-d95e-444e-b8d6-f857a88884e4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:12:34,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:34,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 22:12:34,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:12:34,951 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 22:12:34,952 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:12:34,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324922893] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:12:34,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:12:34,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2023-11-21 22:12:34,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811925985] [2023-11-21 22:12:34,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:12:34,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:12:34,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:12:34,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:12:34,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:12:34,958 INFO L87 Difference]: Start difference. First operand 2067 states and 3875 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 22:12:35,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:12:35,626 INFO L93 Difference]: Finished difference Result 2896 states and 5082 transitions. [2023-11-21 22:12:35,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:12:35,630 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, (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 89 [2023-11-21 22:12:35,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:12:35,653 INFO L225 Difference]: With dead ends: 2896 [2023-11-21 22:12:35,653 INFO L226 Difference]: Without dead ends: 2475 [2023-11-21 22:12:35,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 102 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 22:12:35,662 INFO L413 NwaCegarLoop]: 3198 mSDtfsCounter, 3408 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3408 SdHoareTripleChecker+Valid, 3332 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 22:12:35,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3408 Valid, 3332 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 22:12:35,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2475 states. [2023-11-21 22:12:35,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2475 to 2467. [2023-11-21 22:12:35,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2467 states, 2299 states have (on average 1.8281861678990865) internal successors, (4203), 2306 states have internal predecessors, (4203), 118 states have call successors, (118), 49 states have call predecessors, (118), 48 states have return successors, (116), 112 states have call predecessors, (116), 116 states have call successors, (116) [2023-11-21 22:12:35,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2467 states to 2467 states and 4437 transitions. [2023-11-21 22:12:35,874 INFO L78 Accepts]: Start accepts. Automaton has 2467 states and 4437 transitions. Word has length 89 [2023-11-21 22:12:35,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:12:35,878 INFO L495 AbstractCegarLoop]: Abstraction has 2467 states and 4437 transitions. [2023-11-21 22:12:35,878 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 22:12:35,878 INFO L276 IsEmpty]: Start isEmpty. Operand 2467 states and 4437 transitions. [2023-11-21 22:12:35,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-21 22:12:35,885 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:12:35,886 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, 1] [2023-11-21 22:12:35,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74b4fee-d95e-444e-b8d6-f857a88884e4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-21 22:12:36,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74b4fee-d95e-444e-b8d6-f857a88884e4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:12:36,102 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:12:36,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:12:36,103 INFO L85 PathProgramCache]: Analyzing trace with hash 2111999231, now seen corresponding path program 1 times [2023-11-21 22:12:36,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:12:36,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263372387] [2023-11-21 22:12:36,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:12:36,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:12:36,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:36,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:12:36,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:36,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:12:36,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:36,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:12:36,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:36,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-21 22:12:36,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:36,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-21 22:12:36,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:36,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-21 22:12:36,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:36,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 22:12:36,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:36,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-21 22:12:36,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:36,501 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 22:12:36,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:12:36,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263372387] [2023-11-21 22:12:36,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263372387] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:12:36,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814276013] [2023-11-21 22:12:36,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:12:36,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:12:36,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74b4fee-d95e-444e-b8d6-f857a88884e4/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:12:36,504 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74b4fee-d95e-444e-b8d6-f857a88884e4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:12:36,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74b4fee-d95e-444e-b8d6-f857a88884e4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 22:12:36,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:36,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 22:12:36,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:12:36,754 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 22:12:36,754 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:12:36,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814276013] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:12:36,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:12:36,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2023-11-21 22:12:36,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954313816] [2023-11-21 22:12:36,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:12:36,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:12:36,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:12:36,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:12:36,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:12:36,758 INFO L87 Difference]: Start difference. First operand 2467 states and 4437 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 22:12:37,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:12:37,475 INFO L93 Difference]: Finished difference Result 4084 states and 6774 transitions. [2023-11-21 22:12:37,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:12:37,476 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, (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 89 [2023-11-21 22:12:37,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:12:37,501 INFO L225 Difference]: With dead ends: 4084 [2023-11-21 22:12:37,502 INFO L226 Difference]: Without dead ends: 3263 [2023-11-21 22:12:37,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 102 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 22:12:37,508 INFO L413 NwaCegarLoop]: 3198 mSDtfsCounter, 3417 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3417 SdHoareTripleChecker+Valid, 3332 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:12:37,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3417 Valid, 3332 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 22:12:37,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3263 states. [2023-11-21 22:12:37,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3263 to 3251. [2023-11-21 22:12:37,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3251 states, 2931 states have (on average 1.7355851245308769) internal successors, (5087), 2942 states have internal predecessors, (5087), 222 states have call successors, (222), 97 states have call predecessors, (222), 96 states have return successors, (220), 212 states have call predecessors, (220), 220 states have call successors, (220) [2023-11-21 22:12:37,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3251 states to 3251 states and 5529 transitions. [2023-11-21 22:12:37,784 INFO L78 Accepts]: Start accepts. Automaton has 3251 states and 5529 transitions. Word has length 89 [2023-11-21 22:12:37,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:12:37,785 INFO L495 AbstractCegarLoop]: Abstraction has 3251 states and 5529 transitions. [2023-11-21 22:12:37,785 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 22:12:37,785 INFO L276 IsEmpty]: Start isEmpty. Operand 3251 states and 5529 transitions. [2023-11-21 22:12:37,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-21 22:12:37,790 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:12:37,790 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, 1] [2023-11-21 22:12:37,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74b4fee-d95e-444e-b8d6-f857a88884e4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 22:12:38,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c74b4fee-d95e-444e-b8d6-f857a88884e4/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:12:38,005 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:12:38,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:12:38,006 INFO L85 PathProgramCache]: Analyzing trace with hash -138232899, now seen corresponding path program 1 times [2023-11-21 22:12:38,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:12:38,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852845832] [2023-11-21 22:12:38,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:12:38,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:12:38,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:38,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:12:38,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:38,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-21 22:12:38,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:38,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-21 22:12:38,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:38,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-21 22:12:38,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:38,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-21 22:12:38,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:38,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-21 22:12:38,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:38,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-21 22:12:38,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:38,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-21 22:12:38,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:38,193 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 22:12:38,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:12:38,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852845832] [2023-11-21 22:12:38,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852845832] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:12:38,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:12:38,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:12:38,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951826878] [2023-11-21 22:12:38,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:12:38,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:12:38,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:12:38,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:12:38,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:12:38,197 INFO L87 Difference]: Start difference. First operand 3251 states and 5529 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 3 states have internal predecessors, (52), 4 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8)