./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.02.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_9335f548-bb8e-4332-a04c-55799b9b1f8d/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9335f548-bb8e-4332-a04c-55799b9b1f8d/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9335f548-bb8e-4332-a04c-55799b9b1f8d/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9335f548-bb8e-4332-a04c-55799b9b1f8d/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.02.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9335f548-bb8e-4332-a04c-55799b9b1f8d/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9335f548-bb8e-4332-a04c-55799b9b1f8d/bin/uautomizer-verify-NlZe1sFDwI --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 7e701321e196a1bccf6d27e73a1199a298c61ca16e14855140bb342fbe0d070d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 22:04:55,426 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 22:04:55,566 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9335f548-bb8e-4332-a04c-55799b9b1f8d/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 22:04:55,576 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 22:04:55,576 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 22:04:55,627 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 22:04:55,628 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 22:04:55,629 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 22:04:55,630 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 22:04:55,636 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 22:04:55,637 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 22:04:55,638 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 22:04:55,639 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 22:04:55,641 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 22:04:55,642 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 22:04:55,643 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 22:04:55,643 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 22:04:55,643 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 22:04:55,644 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 22:04:55,644 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 22:04:55,645 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 22:04:55,646 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 22:04:55,646 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 22:04:55,647 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 22:04:55,647 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 22:04:55,648 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 22:04:55,648 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 22:04:55,649 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 22:04:55,650 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 22:04:55,651 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 22:04:55,652 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 22:04:55,653 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:04:55,653 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 22:04:55,653 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 22:04:55,654 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 22:04:55,654 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 22:04:55,654 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 22:04:55,654 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 22:04:55,655 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 22:04:55,655 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 22:04:55,655 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 22:04:55,656 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 22:04:55,656 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_9335f548-bb8e-4332-a04c-55799b9b1f8d/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9335f548-bb8e-4332-a04c-55799b9b1f8d/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e701321e196a1bccf6d27e73a1199a298c61ca16e14855140bb342fbe0d070d [2023-11-24 22:04:56,027 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 22:04:56,068 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 22:04:56,072 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 22:04:56,074 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 22:04:56,074 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 22:04:56,076 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9335f548-bb8e-4332-a04c-55799b9b1f8d/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.02.cil-1.c [2023-11-24 22:04:59,316 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 22:05:00,074 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 22:05:00,075 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9335f548-bb8e-4332-a04c-55799b9b1f8d/sv-benchmarks/c/combinations/Problem05_label49+token_ring.02.cil-1.c [2023-11-24 22:05:00,132 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9335f548-bb8e-4332-a04c-55799b9b1f8d/bin/uautomizer-verify-NlZe1sFDwI/data/3730e6618/3d3c44a90e494bdd92fd903fd57e4168/FLAGbc3aa5f0e [2023-11-24 22:05:00,191 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9335f548-bb8e-4332-a04c-55799b9b1f8d/bin/uautomizer-verify-NlZe1sFDwI/data/3730e6618/3d3c44a90e494bdd92fd903fd57e4168 [2023-11-24 22:05:00,198 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 22:05:00,200 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 22:05:00,205 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 22:05:00,205 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 22:05:00,210 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 22:05:00,211 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:05:00" (1/1) ... [2023-11-24 22:05:00,212 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c2892ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:00, skipping insertion in model container [2023-11-24 22:05:00,212 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:05:00" (1/1) ... [2023-11-24 22:05:00,489 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 22:05:02,964 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_9335f548-bb8e-4332-a04c-55799b9b1f8d/sv-benchmarks/c/combinations/Problem05_label49+token_ring.02.cil-1.c[380593,380606] [2023-11-24 22:05:02,998 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_9335f548-bb8e-4332-a04c-55799b9b1f8d/sv-benchmarks/c/combinations/Problem05_label49+token_ring.02.cil-1.c[383339,383352] [2023-11-24 22:05:03,205 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:05:03,221 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 22:05:04,530 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_9335f548-bb8e-4332-a04c-55799b9b1f8d/sv-benchmarks/c/combinations/Problem05_label49+token_ring.02.cil-1.c[380593,380606] [2023-11-24 22:05:04,539 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_9335f548-bb8e-4332-a04c-55799b9b1f8d/sv-benchmarks/c/combinations/Problem05_label49+token_ring.02.cil-1.c[383339,383352] [2023-11-24 22:05:04,566 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:05:04,652 INFO L206 MainTranslator]: Completed translation [2023-11-24 22:05:04,653 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:04 WrapperNode [2023-11-24 22:05:04,653 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 22:05:04,654 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 22:05:04,654 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 22:05:04,655 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 22:05:04,661 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:04" (1/1) ... [2023-11-24 22:05:04,759 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:04" (1/1) ... [2023-11-24 22:05:05,155 INFO L138 Inliner]: procedures = 48, calls = 47, calls flagged for inlining = 26, calls inlined = 26, statements flattened = 12628 [2023-11-24 22:05:05,155 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 22:05:05,156 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 22:05:05,157 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 22:05:05,157 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 22:05:05,168 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:04" (1/1) ... [2023-11-24 22:05:05,169 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:04" (1/1) ... [2023-11-24 22:05:05,228 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:04" (1/1) ... [2023-11-24 22:05:05,487 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-24 22:05:05,488 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:04" (1/1) ... [2023-11-24 22:05:05,488 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:04" (1/1) ... [2023-11-24 22:05:05,657 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:04" (1/1) ... [2023-11-24 22:05:05,739 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:04" (1/1) ... [2023-11-24 22:05:05,847 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:04" (1/1) ... [2023-11-24 22:05:05,865 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:04" (1/1) ... [2023-11-24 22:05:05,928 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 22:05:05,929 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 22:05:05,930 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 22:05:05,930 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 22:05:05,931 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:04" (1/1) ... [2023-11-24 22:05:05,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:05:05,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9335f548-bb8e-4332-a04c-55799b9b1f8d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:05:05,965 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9335f548-bb8e-4332-a04c-55799b9b1f8d/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 22:05:05,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9335f548-bb8e-4332-a04c-55799b9b1f8d/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 22:05:06,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 22:05:06,010 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-24 22:05:06,010 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-24 22:05:06,010 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-24 22:05:06,012 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-24 22:05:06,013 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-24 22:05:06,013 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-24 22:05:06,013 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-24 22:05:06,013 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-24 22:05:06,014 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-24 22:05:06,014 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-24 22:05:06,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 22:05:06,014 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-24 22:05:06,014 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-24 22:05:06,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 22:05:06,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 22:05:06,162 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 22:05:06,165 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 22:05:16,046 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 22:05:16,168 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 22:05:16,168 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-24 22:05:16,170 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:05:16 BoogieIcfgContainer [2023-11-24 22:05:16,170 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 22:05:16,174 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 22:05:16,174 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 22:05:16,177 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 22:05:16,178 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 10:05:00" (1/3) ... [2023-11-24 22:05:16,180 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45625bc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:05:16, skipping insertion in model container [2023-11-24 22:05:16,181 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:05:04" (2/3) ... [2023-11-24 22:05:16,181 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45625bc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:05:16, skipping insertion in model container [2023-11-24 22:05:16,181 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:05:16" (3/3) ... [2023-11-24 22:05:16,182 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label49+token_ring.02.cil-1.c [2023-11-24 22:05:16,202 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 22:05:16,202 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-24 22:05:16,313 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 22:05:16,320 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;@4edd99bd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 22:05:16,321 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-24 22:05:16,336 INFO L276 IsEmpty]: Start isEmpty. Operand has 2241 states, 2216 states have (on average 1.8858303249097472) internal successors, (4179), 2219 states have internal predecessors, (4179), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-24 22:05:16,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-24 22:05:16,356 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:05:16,357 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] [2023-11-24 22:05:16,357 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:05:16,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:16,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1025812069, now seen corresponding path program 1 times [2023-11-24 22:05:16,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:16,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368041090] [2023-11-24 22:05:16,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:16,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:16,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:16,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 22:05:16,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:16,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-24 22:05:16,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:16,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-24 22:05:16,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:16,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-24 22:05:16,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:16,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-24 22:05:16,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:16,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:05:16,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:16,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368041090] [2023-11-24 22:05:16,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368041090] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:16,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:16,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 22:05:16,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643461853] [2023-11-24 22:05:16,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:16,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 22:05:16,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:16,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 22:05:16,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 22:05:16,957 INFO L87 Difference]: Start difference. First operand has 2241 states, 2216 states have (on average 1.8858303249097472) internal successors, (4179), 2219 states have internal predecessors, (4179), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 22:05:18,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:05:18,233 INFO L93 Difference]: Finished difference Result 4643 states and 8686 transitions. [2023-11-24 22:05:18,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 22:05:18,236 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 61 [2023-11-24 22:05:18,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:05:18,270 INFO L225 Difference]: With dead ends: 4643 [2023-11-24 22:05:18,270 INFO L226 Difference]: Without dead ends: 2404 [2023-11-24 22:05:18,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-11-24 22:05:18,287 INFO L413 NwaCegarLoop]: 4057 mSDtfsCounter, 4350 mSDsluCounter, 12142 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4359 SdHoareTripleChecker+Valid, 16199 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 22:05:18,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4359 Valid, 16199 Invalid, 691 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [68 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-24 22:05:18,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2023-11-24 22:05:18,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 2345. [2023-11-24 22:05:18,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2345 states, 2303 states have (on average 1.84020842379505) internal successors, (4238), 2306 states have internal predecessors, (4238), 27 states have call successors, (27), 12 states have call predecessors, (27), 13 states have return successors, (30), 27 states have call predecessors, (30), 27 states have call successors, (30) [2023-11-24 22:05:18,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2345 states to 2345 states and 4295 transitions. [2023-11-24 22:05:18,453 INFO L78 Accepts]: Start accepts. Automaton has 2345 states and 4295 transitions. Word has length 61 [2023-11-24 22:05:18,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:05:18,454 INFO L495 AbstractCegarLoop]: Abstraction has 2345 states and 4295 transitions. [2023-11-24 22:05:18,454 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 22:05:18,454 INFO L276 IsEmpty]: Start isEmpty. Operand 2345 states and 4295 transitions. [2023-11-24 22:05:18,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-24 22:05:18,458 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:05:18,458 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] [2023-11-24 22:05:18,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 22:05:18,459 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:05:18,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:18,460 INFO L85 PathProgramCache]: Analyzing trace with hash 982636635, now seen corresponding path program 1 times [2023-11-24 22:05:18,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:18,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562788271] [2023-11-24 22:05:18,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:18,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:18,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:18,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 22:05:18,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:18,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-24 22:05:18,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:18,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-24 22:05:18,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:18,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-24 22:05:18,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:18,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-24 22:05:18,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:18,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:05:18,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:18,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562788271] [2023-11-24 22:05:18,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562788271] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:18,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:18,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 22:05:18,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776649701] [2023-11-24 22:05:18,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:18,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 22:05:18,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:18,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 22:05:18,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 22:05:18,702 INFO L87 Difference]: Start difference. First operand 2345 states and 4295 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 22:05:20,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:05:20,086 INFO L93 Difference]: Finished difference Result 2757 states and 4924 transitions. [2023-11-24 22:05:20,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 22:05:20,086 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 61 [2023-11-24 22:05:20,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:05:20,104 INFO L225 Difference]: With dead ends: 2757 [2023-11-24 22:05:20,104 INFO L226 Difference]: Without dead ends: 2541 [2023-11-24 22:05:20,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-11-24 22:05:20,108 INFO L413 NwaCegarLoop]: 4121 mSDtfsCounter, 4342 mSDsluCounter, 16314 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4351 SdHoareTripleChecker+Valid, 20435 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-24 22:05:20,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4351 Valid, 20435 Invalid, 1048 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [41 Valid, 1007 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-24 22:05:20,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2541 states. [2023-11-24 22:05:20,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2541 to 2446. [2023-11-24 22:05:20,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2446 states, 2386 states have (on average 1.8281642917015926) internal successors, (4362), 2390 states have internal predecessors, (4362), 38 states have call successors, (38), 18 states have call predecessors, (38), 20 states have return successors, (43), 39 states have call predecessors, (43), 38 states have call successors, (43) [2023-11-24 22:05:20,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2446 states to 2446 states and 4443 transitions. [2023-11-24 22:05:20,207 INFO L78 Accepts]: Start accepts. Automaton has 2446 states and 4443 transitions. Word has length 61 [2023-11-24 22:05:20,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:05:20,207 INFO L495 AbstractCegarLoop]: Abstraction has 2446 states and 4443 transitions. [2023-11-24 22:05:20,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 22:05:20,208 INFO L276 IsEmpty]: Start isEmpty. Operand 2446 states and 4443 transitions. [2023-11-24 22:05:20,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-24 22:05:20,210 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:05:20,211 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] [2023-11-24 22:05:20,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 22:05:20,211 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:05:20,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:20,212 INFO L85 PathProgramCache]: Analyzing trace with hash 967117917, now seen corresponding path program 1 times [2023-11-24 22:05:20,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:20,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655529096] [2023-11-24 22:05:20,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:20,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:20,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:20,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 22:05:20,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:20,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-24 22:05:20,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:20,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-24 22:05:20,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:20,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-24 22:05:20,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:20,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-24 22:05:20,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:20,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:05:20,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:20,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655529096] [2023-11-24 22:05:20,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655529096] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:20,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:20,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 22:05:20,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076230066] [2023-11-24 22:05:20,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:20,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 22:05:20,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:20,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 22:05:20,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 22:05:20,429 INFO L87 Difference]: Start difference. First operand 2446 states and 4443 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 22:05:21,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:05:21,619 INFO L93 Difference]: Finished difference Result 3115 states and 5460 transitions. [2023-11-24 22:05:21,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 22:05:21,620 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 61 [2023-11-24 22:05:21,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:05:21,641 INFO L225 Difference]: With dead ends: 3115 [2023-11-24 22:05:21,641 INFO L226 Difference]: Without dead ends: 2798 [2023-11-24 22:05:21,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-11-24 22:05:21,649 INFO L413 NwaCegarLoop]: 4062 mSDtfsCounter, 4378 mSDsluCounter, 16167 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4387 SdHoareTripleChecker+Valid, 20229 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 22:05:21,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4387 Valid, 20229 Invalid, 887 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [59 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 22:05:21,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2798 states. [2023-11-24 22:05:21,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2798 to 2649. [2023-11-24 22:05:21,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2649 states, 2553 states have (on average 1.8061104582843712) internal successors, (4611), 2559 states have internal predecessors, (4611), 60 states have call successors, (60), 30 states have call predecessors, (60), 34 states have return successors, (73), 63 states have call predecessors, (73), 60 states have call successors, (73) [2023-11-24 22:05:21,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2649 states to 2649 states and 4744 transitions. [2023-11-24 22:05:21,773 INFO L78 Accepts]: Start accepts. Automaton has 2649 states and 4744 transitions. Word has length 61 [2023-11-24 22:05:21,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:05:21,774 INFO L495 AbstractCegarLoop]: Abstraction has 2649 states and 4744 transitions. [2023-11-24 22:05:21,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 22:05:21,774 INFO L276 IsEmpty]: Start isEmpty. Operand 2649 states and 4744 transitions. [2023-11-24 22:05:21,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-24 22:05:21,777 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:05:21,778 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] [2023-11-24 22:05:21,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 22:05:21,778 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:05:21,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:21,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1388687333, now seen corresponding path program 1 times [2023-11-24 22:05:21,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:21,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719879819] [2023-11-24 22:05:21,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:21,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:21,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:21,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 22:05:21,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:21,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-24 22:05:21,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:21,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-24 22:05:21,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:21,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-24 22:05:22,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:22,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-24 22:05:22,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:22,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:05:22,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:22,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719879819] [2023-11-24 22:05:22,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719879819] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:22,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:22,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 22:05:22,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469641831] [2023-11-24 22:05:22,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:22,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 22:05:22,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:22,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 22:05:22,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 22:05:22,026 INFO L87 Difference]: Start difference. First operand 2649 states and 4744 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 22:05:23,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:05:23,483 INFO L93 Difference]: Finished difference Result 3887 states and 6619 transitions. [2023-11-24 22:05:23,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-24 22:05:23,484 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 61 [2023-11-24 22:05:23,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:05:23,506 INFO L225 Difference]: With dead ends: 3887 [2023-11-24 22:05:23,507 INFO L226 Difference]: Without dead ends: 3367 [2023-11-24 22:05:23,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-11-24 22:05:23,511 INFO L413 NwaCegarLoop]: 4116 mSDtfsCounter, 4350 mSDsluCounter, 16306 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4358 SdHoareTripleChecker+Valid, 20422 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-24 22:05:23,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4358 Valid, 20422 Invalid, 1128 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [45 Valid, 1083 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-24 22:05:23,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3367 states. [2023-11-24 22:05:23,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3367 to 3033. [2023-11-24 22:05:23,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3033 states, 2869 states have (on average 1.7716974555594285) internal successors, (5083), 2879 states have internal predecessors, (5083), 100 states have call successors, (100), 54 states have call predecessors, (100), 62 states have return successors, (135), 107 states have call predecessors, (135), 100 states have call successors, (135) [2023-11-24 22:05:23,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3033 states to 3033 states and 5318 transitions. [2023-11-24 22:05:23,650 INFO L78 Accepts]: Start accepts. Automaton has 3033 states and 5318 transitions. Word has length 61 [2023-11-24 22:05:23,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:05:23,650 INFO L495 AbstractCegarLoop]: Abstraction has 3033 states and 5318 transitions. [2023-11-24 22:05:23,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 22:05:23,651 INFO L276 IsEmpty]: Start isEmpty. Operand 3033 states and 5318 transitions. [2023-11-24 22:05:23,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-24 22:05:23,653 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:05:23,653 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] [2023-11-24 22:05:23,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 22:05:23,654 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:05:23,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:23,654 INFO L85 PathProgramCache]: Analyzing trace with hash 539585369, now seen corresponding path program 1 times [2023-11-24 22:05:23,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:23,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303931800] [2023-11-24 22:05:23,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:23,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:23,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:23,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 22:05:23,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:23,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-24 22:05:23,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:23,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-24 22:05:23,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:23,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-24 22:05:23,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:23,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-24 22:05:23,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:23,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:05:23,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:23,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303931800] [2023-11-24 22:05:23,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303931800] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:23,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:23,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 22:05:23,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326173791] [2023-11-24 22:05:23,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:23,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 22:05:23,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:23,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 22:05:23,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 22:05:23,828 INFO L87 Difference]: Start difference. First operand 3033 states and 5318 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 22:05:25,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:05:25,037 INFO L93 Difference]: Finished difference Result 5185 states and 8559 transitions. [2023-11-24 22:05:25,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-24 22:05:25,037 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 61 [2023-11-24 22:05:25,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:05:25,066 INFO L225 Difference]: With dead ends: 5185 [2023-11-24 22:05:25,066 INFO L226 Difference]: Without dead ends: 4281 [2023-11-24 22:05:25,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-11-24 22:05:25,072 INFO L413 NwaCegarLoop]: 4117 mSDtfsCounter, 4350 mSDsluCounter, 16309 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4362 SdHoareTripleChecker+Valid, 20426 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 22:05:25,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4362 Valid, 20426 Invalid, 999 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [47 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-24 22:05:25,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4281 states. [2023-11-24 22:05:25,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4281 to 3818. [2023-11-24 22:05:25,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3818 states, 3522 states have (on average 1.7208972174900625) internal successors, (6061), 3540 states have internal predecessors, (6061), 176 states have call successors, (176), 102 states have call predecessors, (176), 118 states have return successors, (273), 191 states have call predecessors, (273), 176 states have call successors, (273) [2023-11-24 22:05:25,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3818 states to 3818 states and 6510 transitions. [2023-11-24 22:05:25,262 INFO L78 Accepts]: Start accepts. Automaton has 3818 states and 6510 transitions. Word has length 61 [2023-11-24 22:05:25,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:05:25,262 INFO L495 AbstractCegarLoop]: Abstraction has 3818 states and 6510 transitions. [2023-11-24 22:05:25,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 22:05:25,263 INFO L276 IsEmpty]: Start isEmpty. Operand 3818 states and 6510 transitions. [2023-11-24 22:05:25,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-24 22:05:25,265 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:05:25,266 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] [2023-11-24 22:05:25,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 22:05:25,266 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:05:25,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:25,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1433071707, now seen corresponding path program 1 times [2023-11-24 22:05:25,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:25,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146379035] [2023-11-24 22:05:25,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:25,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:25,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:25,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 22:05:25,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:25,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-24 22:05:25,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:25,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-24 22:05:25,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:25,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-24 22:05:25,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:25,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-24 22:05:25,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:25,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:05:25,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:25,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146379035] [2023-11-24 22:05:25,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146379035] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:25,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:05:25,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 22:05:25,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501516987] [2023-11-24 22:05:25,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:25,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 22:05:25,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:25,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 22:05:25,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 22:05:25,381 INFO L87 Difference]: Start difference. First operand 3818 states and 6510 transitions. 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 22:05:26,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:05:26,540 INFO L93 Difference]: Finished difference Result 6913 states and 11211 transitions. [2023-11-24 22:05:26,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 22:05:26,540 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 61 [2023-11-24 22:05:26,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:05:26,574 INFO L225 Difference]: With dead ends: 6913 [2023-11-24 22:05:26,574 INFO L226 Difference]: Without dead ends: 5225 [2023-11-24 22:05:26,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-24 22:05:26,588 INFO L413 NwaCegarLoop]: 4142 mSDtfsCounter, 4472 mSDsluCounter, 12167 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4497 SdHoareTripleChecker+Valid, 16309 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 22:05:26,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4497 Valid, 16309 Invalid, 875 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [67 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 22:05:26,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5225 states. [2023-11-24 22:05:26,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5225 to 4690. [2023-11-24 22:05:26,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4690 states, 4236 states have (on average 1.674929178470255) internal successors, (7095), 4271 states have internal predecessors, (7095), 272 states have call successors, (272), 156 states have call predecessors, (272), 180 states have return successors, (397), 278 states have call predecessors, (397), 272 states have call successors, (397) [2023-11-24 22:05:26,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4690 states to 4690 states and 7764 transitions. [2023-11-24 22:05:26,826 INFO L78 Accepts]: Start accepts. Automaton has 4690 states and 7764 transitions. Word has length 61 [2023-11-24 22:05:26,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:05:26,826 INFO L495 AbstractCegarLoop]: Abstraction has 4690 states and 7764 transitions. [2023-11-24 22:05:26,827 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 22:05:26,828 INFO L276 IsEmpty]: Start isEmpty. Operand 4690 states and 7764 transitions. [2023-11-24 22:05:26,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-24 22:05:26,838 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:05:26,838 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:05:26,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 22:05:26,839 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:05:26,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:26,839 INFO L85 PathProgramCache]: Analyzing trace with hash -2038766860, now seen corresponding path program 1 times [2023-11-24 22:05:26,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:26,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672428461] [2023-11-24 22:05:26,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:26,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:26,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:26,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 22:05:26,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:26,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-24 22:05:26,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:26,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-24 22:05:26,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:26,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-24 22:05:26,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:26,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-24 22:05:27,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:27,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-24 22:05:27,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:27,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-24 22:05:27,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:27,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2023-11-24 22:05:27,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:27,019 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-24 22:05:27,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:27,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672428461] [2023-11-24 22:05:27,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672428461] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:05:27,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706831696] [2023-11-24 22:05:27,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:27,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:05:27,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9335f548-bb8e-4332-a04c-55799b9b1f8d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:05:27,024 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9335f548-bb8e-4332-a04c-55799b9b1f8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:05:27,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9335f548-bb8e-4332-a04c-55799b9b1f8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 22:05:27,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:27,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 22:05:27,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:05:27,271 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-24 22:05:27,273 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:05:27,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706831696] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:27,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 22:05:27,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2023-11-24 22:05:27,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323297852] [2023-11-24 22:05:27,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:27,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:05:27,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:27,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:05:27,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 22:05:27,284 INFO L87 Difference]: Start difference. First operand 4690 states and 7764 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-24 22:05:27,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:05:27,615 INFO L93 Difference]: Finished difference Result 9693 states and 15244 transitions. [2023-11-24 22:05:27,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:05:27,616 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 99 [2023-11-24 22:05:27,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:05:27,669 INFO L225 Difference]: With dead ends: 9693 [2023-11-24 22:05:27,671 INFO L226 Difference]: Without dead ends: 7133 [2023-11-24 22:05:27,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 22:05:27,682 INFO L413 NwaCegarLoop]: 4114 mSDtfsCounter, 4092 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4092 SdHoareTripleChecker+Valid, 4254 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 22:05:27,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4092 Valid, 4254 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 22:05:27,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7133 states. [2023-11-24 22:05:28,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7133 to 7105. [2023-11-24 22:05:28,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7105 states, 6237 states have (on average 1.6091069424402757) internal successors, (10036), 6305 states have internal predecessors, (10036), 510 states have call successors, (510), 308 states have call predecessors, (510), 356 states have return successors, (745), 507 states have call predecessors, (745), 510 states have call successors, (745) [2023-11-24 22:05:28,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7105 states to 7105 states and 11291 transitions. [2023-11-24 22:05:28,325 INFO L78 Accepts]: Start accepts. Automaton has 7105 states and 11291 transitions. Word has length 99 [2023-11-24 22:05:28,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:05:28,326 INFO L495 AbstractCegarLoop]: Abstraction has 7105 states and 11291 transitions. [2023-11-24 22:05:28,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-24 22:05:28,327 INFO L276 IsEmpty]: Start isEmpty. Operand 7105 states and 11291 transitions. [2023-11-24 22:05:28,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-24 22:05:28,345 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:05:28,346 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:05:28,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9335f548-bb8e-4332-a04c-55799b9b1f8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 22:05:28,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9335f548-bb8e-4332-a04c-55799b9b1f8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:05:28,555 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:05:28,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:28,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1873471468, now seen corresponding path program 1 times [2023-11-24 22:05:28,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:28,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158487477] [2023-11-24 22:05:28,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:28,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:28,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:28,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 22:05:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:28,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-24 22:05:28,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:28,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-24 22:05:28,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:28,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-24 22:05:28,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:28,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-24 22:05:28,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:28,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-24 22:05:28,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:28,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-24 22:05:28,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:28,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2023-11-24 22:05:28,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:28,760 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-24 22:05:28,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:28,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158487477] [2023-11-24 22:05:28,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158487477] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:05:28,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899073446] [2023-11-24 22:05:28,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:28,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:05:28,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9335f548-bb8e-4332-a04c-55799b9b1f8d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:05:28,763 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9335f548-bb8e-4332-a04c-55799b9b1f8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:05:28,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9335f548-bb8e-4332-a04c-55799b9b1f8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 22:05:28,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:28,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 22:05:28,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:05:28,929 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-24 22:05:28,930 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:05:28,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899073446] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:28,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 22:05:28,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-24 22:05:28,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676184022] [2023-11-24 22:05:28,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:28,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:05:28,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:28,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:05:28,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 22:05:28,933 INFO L87 Difference]: Start difference. First operand 7105 states and 11291 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-24 22:05:29,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:05:29,660 INFO L93 Difference]: Finished difference Result 16767 states and 25811 transitions. [2023-11-24 22:05:29,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:05:29,661 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 99 [2023-11-24 22:05:29,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:05:29,725 INFO L225 Difference]: With dead ends: 16767 [2023-11-24 22:05:29,725 INFO L226 Difference]: Without dead ends: 11793 [2023-11-24 22:05:29,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 22:05:29,749 INFO L413 NwaCegarLoop]: 4254 mSDtfsCounter, 145 mSDsluCounter, 4113 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 8367 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 22:05:29,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 8367 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 22:05:29,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11793 states. [2023-11-24 22:05:30,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11793 to 11793. [2023-11-24 22:05:30,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11793 states, 10112 states have (on average 1.5505340189873418) internal successors, (15679), 10229 states have internal predecessors, (15679), 975 states have call successors, (975), 608 states have call predecessors, (975), 704 states have return successors, (1596), 987 states have call predecessors, (1596), 975 states have call successors, (1596) [2023-11-24 22:05:30,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11793 states to 11793 states and 18250 transitions. [2023-11-24 22:05:30,546 INFO L78 Accepts]: Start accepts. Automaton has 11793 states and 18250 transitions. Word has length 99 [2023-11-24 22:05:30,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:05:30,548 INFO L495 AbstractCegarLoop]: Abstraction has 11793 states and 18250 transitions. [2023-11-24 22:05:30,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-24 22:05:30,548 INFO L276 IsEmpty]: Start isEmpty. Operand 11793 states and 18250 transitions. [2023-11-24 22:05:30,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-11-24 22:05:30,585 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:05:30,586 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:05:30,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9335f548-bb8e-4332-a04c-55799b9b1f8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-24 22:05:30,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9335f548-bb8e-4332-a04c-55799b9b1f8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:05:30,794 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:05:30,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:30,795 INFO L85 PathProgramCache]: Analyzing trace with hash 656990162, now seen corresponding path program 1 times [2023-11-24 22:05:30,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:30,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811652949] [2023-11-24 22:05:30,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:30,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:30,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:30,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 22:05:30,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:30,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-24 22:05:30,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:30,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-24 22:05:30,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:30,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-24 22:05:30,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:30,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-24 22:05:30,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:30,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-24 22:05:30,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:30,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-24 22:05:30,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:30,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2023-11-24 22:05:30,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:30,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-24 22:05:30,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:30,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2023-11-24 22:05:30,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:30,942 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-24 22:05:30,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:30,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811652949] [2023-11-24 22:05:30,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811652949] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:05:30,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506375610] [2023-11-24 22:05:30,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:30,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:05:30,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9335f548-bb8e-4332-a04c-55799b9b1f8d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:05:30,944 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9335f548-bb8e-4332-a04c-55799b9b1f8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:05:30,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9335f548-bb8e-4332-a04c-55799b9b1f8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 22:05:31,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:31,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 22:05:31,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:05:31,210 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-24 22:05:31,211 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:05:31,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506375610] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:31,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 22:05:31,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2023-11-24 22:05:31,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108389525] [2023-11-24 22:05:31,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:31,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:05:31,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:31,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:05:31,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 22:05:31,214 INFO L87 Difference]: Start difference. First operand 11793 states and 18250 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-24 22:05:32,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:05:32,143 INFO L93 Difference]: Finished difference Result 30733 states and 46555 transitions. [2023-11-24 22:05:32,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:05:32,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 127 [2023-11-24 22:05:32,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:05:32,237 INFO L225 Difference]: With dead ends: 30733 [2023-11-24 22:05:32,237 INFO L226 Difference]: Without dead ends: 21075 [2023-11-24 22:05:32,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 22:05:32,279 INFO L413 NwaCegarLoop]: 4117 mSDtfsCounter, 4053 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4053 SdHoareTripleChecker+Valid, 4257 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 22:05:32,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4053 Valid, 4257 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 22:05:32,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21075 states. [2023-11-24 22:05:33,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21075 to 20969. [2023-11-24 22:05:33,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20969 states, 17708 states have (on average 1.5070589564038852) internal successors, (26687), 17939 states have internal predecessors, (26687), 1869 states have call successors, (1869), 1198 states have call predecessors, (1869), 1390 states have return successors, (3038), 1863 states have call predecessors, (3038), 1869 states have call successors, (3038) [2023-11-24 22:05:33,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20969 states to 20969 states and 31594 transitions. [2023-11-24 22:05:33,553 INFO L78 Accepts]: Start accepts. Automaton has 20969 states and 31594 transitions. Word has length 127 [2023-11-24 22:05:33,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:05:33,553 INFO L495 AbstractCegarLoop]: Abstraction has 20969 states and 31594 transitions. [2023-11-24 22:05:33,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-24 22:05:33,554 INFO L276 IsEmpty]: Start isEmpty. Operand 20969 states and 31594 transitions. [2023-11-24 22:05:33,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-11-24 22:05:33,626 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:05:33,627 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:05:33,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9335f548-bb8e-4332-a04c-55799b9b1f8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-24 22:05:33,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9335f548-bb8e-4332-a04c-55799b9b1f8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:05:33,833 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:05:33,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:33,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1035607077, now seen corresponding path program 1 times [2023-11-24 22:05:33,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:33,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838501120] [2023-11-24 22:05:33,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:33,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:33,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:33,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 22:05:33,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:33,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-24 22:05:33,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:33,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-24 22:05:33,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:33,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-24 22:05:33,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:33,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-24 22:05:33,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:33,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-11-24 22:05:33,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:33,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-11-24 22:05:33,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:33,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-24 22:05:33,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:33,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2023-11-24 22:05:33,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:34,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-24 22:05:34,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:34,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-11-24 22:05:34,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:34,009 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-24 22:05:34,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:34,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838501120] [2023-11-24 22:05:34,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838501120] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:05:34,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994694893] [2023-11-24 22:05:34,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:34,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:05:34,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9335f548-bb8e-4332-a04c-55799b9b1f8d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:05:34,011 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9335f548-bb8e-4332-a04c-55799b9b1f8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:05:34,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9335f548-bb8e-4332-a04c-55799b9b1f8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 22:05:34,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:34,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 22:05:34,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:05:34,244 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-24 22:05:34,244 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:05:34,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994694893] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:34,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 22:05:34,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-24 22:05:34,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041588007] [2023-11-24 22:05:34,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:34,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:05:34,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:34,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:05:34,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 22:05:34,247 INFO L87 Difference]: Start difference. First operand 20969 states and 31594 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-24 22:05:34,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:05:34,964 INFO L93 Difference]: Finished difference Result 33443 states and 50451 transitions. [2023-11-24 22:05:34,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:05:34,969 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 143 [2023-11-24 22:05:34,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:05:35,044 INFO L225 Difference]: With dead ends: 33443 [2023-11-24 22:05:35,045 INFO L226 Difference]: Without dead ends: 18715 [2023-11-24 22:05:35,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 22:05:35,226 INFO L413 NwaCegarLoop]: 4114 mSDtfsCounter, 4086 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4086 SdHoareTripleChecker+Valid, 4142 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 22:05:35,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4086 Valid, 4142 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 22:05:35,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18715 states. [2023-11-24 22:05:36,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18715 to 14099. [2023-11-24 22:05:36,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14099 states, 12046 states have (on average 1.4857214012950357) internal successors, (17897), 12167 states have internal predecessors, (17897), 1161 states have call successors, (1161), 794 states have call predecessors, (1161), 890 states have return successors, (1648), 1153 states have call predecessors, (1648), 1161 states have call successors, (1648) [2023-11-24 22:05:36,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14099 states to 14099 states and 20706 transitions. [2023-11-24 22:05:36,458 INFO L78 Accepts]: Start accepts. Automaton has 14099 states and 20706 transitions. Word has length 143 [2023-11-24 22:05:36,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:05:36,459 INFO L495 AbstractCegarLoop]: Abstraction has 14099 states and 20706 transitions. [2023-11-24 22:05:36,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-24 22:05:36,459 INFO L276 IsEmpty]: Start isEmpty. Operand 14099 states and 20706 transitions. [2023-11-24 22:05:36,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-11-24 22:05:36,500 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:05:36,501 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:05:36,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9335f548-bb8e-4332-a04c-55799b9b1f8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 22:05:36,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9335f548-bb8e-4332-a04c-55799b9b1f8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-24 22:05:36,707 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:05:36,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:36,707 INFO L85 PathProgramCache]: Analyzing trace with hash 392545529, now seen corresponding path program 1 times [2023-11-24 22:05:36,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:36,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813143006] [2023-11-24 22:05:36,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:36,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:36,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:36,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 22:05:36,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:36,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-24 22:05:36,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:36,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-24 22:05:36,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:36,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-24 22:05:36,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:36,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-24 22:05:36,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:36,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-11-24 22:05:36,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:36,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-11-24 22:05:36,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:36,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-24 22:05:36,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:36,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2023-11-24 22:05:36,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:36,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-24 22:05:36,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:36,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2023-11-24 22:05:36,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:36,903 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-24 22:05:36,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:36,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813143006] [2023-11-24 22:05:36,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813143006] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:05:36,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530971621] [2023-11-24 22:05:36,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:36,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:05:36,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9335f548-bb8e-4332-a04c-55799b9b1f8d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:05:36,906 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9335f548-bb8e-4332-a04c-55799b9b1f8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:05:36,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9335f548-bb8e-4332-a04c-55799b9b1f8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 22:05:37,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:37,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 22:05:37,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:05:37,129 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-24 22:05:37,129 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:05:37,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530971621] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:37,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 22:05:37,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-24 22:05:37,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280627390] [2023-11-24 22:05:37,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:37,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:05:37,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:37,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:05:37,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 22:05:37,135 INFO L87 Difference]: Start difference. First operand 14099 states and 20706 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-24 22:05:37,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:05:37,995 INFO L93 Difference]: Finished difference Result 23244 states and 33469 transitions. [2023-11-24 22:05:37,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:05:37,996 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 143 [2023-11-24 22:05:37,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:05:38,048 INFO L225 Difference]: With dead ends: 23244 [2023-11-24 22:05:38,048 INFO L226 Difference]: Without dead ends: 14923 [2023-11-24 22:05:38,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 22:05:38,067 INFO L413 NwaCegarLoop]: 4143 mSDtfsCounter, 4079 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4079 SdHoareTripleChecker+Valid, 4288 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 22:05:38,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4079 Valid, 4288 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 22:05:38,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14923 states. [2023-11-24 22:05:38,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14923 to 14857. [2023-11-24 22:05:38,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14857 states, 12716 states have (on average 1.4599716892104435) internal successors, (18565), 12837 states have internal predecessors, (18565), 1183 states have call successors, (1183), 860 states have call predecessors, (1183), 956 states have return successors, (1736), 1175 states have call predecessors, (1736), 1183 states have call successors, (1736) [2023-11-24 22:05:38,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14857 states to 14857 states and 21484 transitions. [2023-11-24 22:05:38,954 INFO L78 Accepts]: Start accepts. Automaton has 14857 states and 21484 transitions. Word has length 143 [2023-11-24 22:05:38,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:05:38,955 INFO L495 AbstractCegarLoop]: Abstraction has 14857 states and 21484 transitions. [2023-11-24 22:05:38,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-24 22:05:38,955 INFO L276 IsEmpty]: Start isEmpty. Operand 14857 states and 21484 transitions. [2023-11-24 22:05:38,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-24 22:05:38,980 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:05:38,980 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:05:38,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9335f548-bb8e-4332-a04c-55799b9b1f8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 22:05:39,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9335f548-bb8e-4332-a04c-55799b9b1f8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-24 22:05:39,186 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 22:05:39,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:05:39,187 INFO L85 PathProgramCache]: Analyzing trace with hash 843493193, now seen corresponding path program 1 times [2023-11-24 22:05:39,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:05:39,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099837014] [2023-11-24 22:05:39,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:39,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:05:39,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:39,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 22:05:39,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:39,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-24 22:05:39,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:39,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-24 22:05:39,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:39,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-24 22:05:39,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:39,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-11-24 22:05:39,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:39,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-24 22:05:39,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:39,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-24 22:05:39,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:39,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-24 22:05:39,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:39,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2023-11-24 22:05:39,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:39,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-24 22:05:39,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:39,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2023-11-24 22:05:39,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:39,345 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-24 22:05:39,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:05:39,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099837014] [2023-11-24 22:05:39,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099837014] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:05:39,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103255020] [2023-11-24 22:05:39,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:05:39,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:05:39,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9335f548-bb8e-4332-a04c-55799b9b1f8d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:05:39,347 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9335f548-bb8e-4332-a04c-55799b9b1f8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:05:39,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9335f548-bb8e-4332-a04c-55799b9b1f8d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 22:05:39,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:05:39,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 22:05:39,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:05:39,514 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-24 22:05:39,514 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:05:39,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103255020] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:05:39,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 22:05:39,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-24 22:05:39,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176453099] [2023-11-24 22:05:39,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:05:39,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:05:39,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:05:39,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:05:39,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 22:05:39,517 INFO L87 Difference]: Start difference. First operand 14857 states and 21484 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11)