./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label44+token_ring.11.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label44+token_ring.11.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7c713aa7938ec5ae1ba06a0e41e275f2f1d72befd88a887a14dfcd6cc53c5088 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:09:24,816 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:09:24,894 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:09:24,899 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:09:24,900 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:09:24,926 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:09:24,927 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:09:24,928 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:09:24,929 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:09:24,929 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:09:24,930 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:09:24,930 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:09:24,931 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:09:24,932 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:09:24,932 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:09:24,933 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:09:24,933 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:09:24,934 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:09:24,934 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:09:24,935 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:09:24,935 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:09:24,937 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:09:24,938 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:09:24,939 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:09:24,939 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:09:24,940 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:09:24,940 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:09:24,941 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:09:24,941 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:09:24,941 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:09:24,943 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:09:24,943 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:09:24,943 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:09:24,944 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:09:24,944 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:09:24,944 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:09:24,944 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:09:24,945 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:09:24,945 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:09:24,945 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:09:24,945 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:09:24,946 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:09:24,947 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:09:24,947 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:09:24,949 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:09:24,949 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:09:24,949 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:09:24,950 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c713aa7938ec5ae1ba06a0e41e275f2f1d72befd88a887a14dfcd6cc53c5088 [2023-11-23 21:09:25,265 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:09:25,293 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:09:25,297 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:09:25,299 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:09:25,299 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:09:25,301 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/combinations/Problem05_label44+token_ring.11.cil-2.c [2023-11-23 21:09:28,384 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:09:29,186 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:09:29,186 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224dc1ec-01eb-4ef2-843e-873ce54018b0/sv-benchmarks/c/combinations/Problem05_label44+token_ring.11.cil-2.c [2023-11-23 21:09:29,239 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire/data/153413546/91a0dff5edf04bec8fac69bcd067980a/FLAGa82ba1abc [2023-11-23 21:09:29,257 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire/data/153413546/91a0dff5edf04bec8fac69bcd067980a [2023-11-23 21:09:29,265 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:09:29,267 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:09:29,269 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:09:29,269 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:09:29,274 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:09:29,275 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:09:29" (1/1) ... [2023-11-23 21:09:29,276 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ff2984d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:29, skipping insertion in model container [2023-11-23 21:09:29,277 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:09:29" (1/1) ... [2023-11-23 21:09:29,593 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:09:31,943 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_224dc1ec-01eb-4ef2-843e-873ce54018b0/sv-benchmarks/c/combinations/Problem05_label44+token_ring.11.cil-2.c[377340,377353] [2023-11-23 21:09:31,982 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_224dc1ec-01eb-4ef2-843e-873ce54018b0/sv-benchmarks/c/combinations/Problem05_label44+token_ring.11.cil-2.c[383339,383352] [2023-11-23 21:09:32,360 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:09:32,376 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:09:33,603 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_224dc1ec-01eb-4ef2-843e-873ce54018b0/sv-benchmarks/c/combinations/Problem05_label44+token_ring.11.cil-2.c[377340,377353] [2023-11-23 21:09:33,614 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_224dc1ec-01eb-4ef2-843e-873ce54018b0/sv-benchmarks/c/combinations/Problem05_label44+token_ring.11.cil-2.c[383339,383352] [2023-11-23 21:09:33,667 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:09:33,745 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:09:33,746 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:33 WrapperNode [2023-11-23 21:09:33,747 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:09:33,748 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:09:33,748 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:09:33,748 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:09:33,756 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:33" (1/1) ... [2023-11-23 21:09:33,863 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:33" (1/1) ... [2023-11-23 21:09:34,407 INFO L138 Inliner]: procedures = 66, calls = 74, calls flagged for inlining = 44, calls inlined = 44, statements flattened = 13168 [2023-11-23 21:09:34,407 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:09:34,408 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:09:34,408 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:09:34,408 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:09:34,433 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:33" (1/1) ... [2023-11-23 21:09:34,433 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:33" (1/1) ... [2023-11-23 21:09:34,530 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:33" (1/1) ... [2023-11-23 21:09:34,531 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:33" (1/1) ... [2023-11-23 21:09:34,768 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:33" (1/1) ... [2023-11-23 21:09:34,831 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:33" (1/1) ... [2023-11-23 21:09:34,855 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:33" (1/1) ... [2023-11-23 21:09:34,885 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:33" (1/1) ... [2023-11-23 21:09:35,065 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:09:35,066 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:09:35,066 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:09:35,067 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:09:35,067 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:33" (1/1) ... [2023-11-23 21:09:35,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:09:35,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:35,097 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:09:35,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:09:35,140 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:09:35,142 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-23 21:09:35,143 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-23 21:09:35,143 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-23 21:09:35,143 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-23 21:09:35,143 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-23 21:09:35,143 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-23 21:09:35,143 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-23 21:09:35,144 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-23 21:09:35,144 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-23 21:09:35,144 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-23 21:09:35,144 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-23 21:09:35,144 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-23 21:09:35,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:09:35,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:09:35,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:09:35,322 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:09:35,324 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:09:45,039 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:09:48,112 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:09:48,113 INFO L309 CfgBuilder]: Removed 15 assume(true) statements. [2023-11-23 21:09:48,115 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:09:48 BoogieIcfgContainer [2023-11-23 21:09:48,116 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:09:48,118 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:09:48,119 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:09:48,122 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:09:48,122 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:09:29" (1/3) ... [2023-11-23 21:09:48,123 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35fccb03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:09:48, skipping insertion in model container [2023-11-23 21:09:48,123 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:33" (2/3) ... [2023-11-23 21:09:48,123 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35fccb03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:09:48, skipping insertion in model container [2023-11-23 21:09:48,124 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:09:48" (3/3) ... [2023-11-23 21:09:48,125 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label44+token_ring.11.cil-2.c [2023-11-23 21:09:48,145 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:09:48,145 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-23 21:09:48,237 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:09:48,245 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=FINITE_AUTOMATA, 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;@161d7039, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:09:48,245 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-23 21:09:48,259 INFO L276 IsEmpty]: Start isEmpty. Operand has 1832 states, 1798 states have (on average 1.9516129032258065) internal successors, (3509), 1801 states have internal predecessors, (3509), 25 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-23 21:09:48,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-23 21:09:48,273 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:48,274 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:48,275 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:48,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:48,281 INFO L85 PathProgramCache]: Analyzing trace with hash -714024738, now seen corresponding path program 1 times [2023-11-23 21:09:48,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:48,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294326004] [2023-11-23 21:09:48,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:48,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:48,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:49,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:49,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:49,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294326004] [2023-11-23 21:09:49,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294326004] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:49,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:49,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:09:49,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877716693] [2023-11-23 21:09:49,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:49,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:09:49,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:49,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:09:49,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:09:49,095 INFO L87 Difference]: Start difference. First operand has 1832 states, 1798 states have (on average 1.9516129032258065) internal successors, (3509), 1801 states have internal predecessors, (3509), 25 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:09:50,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:50,198 INFO L93 Difference]: Finished difference Result 3836 states and 7407 transitions. [2023-11-23 21:09:50,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:09:50,202 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (5), 1 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 64 [2023-11-23 21:09:50,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:50,231 INFO L225 Difference]: With dead ends: 3836 [2023-11-23 21:09:50,232 INFO L226 Difference]: Without dead ends: 2003 [2023-11-23 21:09:50,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:09:50,246 INFO L413 NwaCegarLoop]: 3505 mSDtfsCounter, 3770 mSDsluCounter, 3411 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3770 SdHoareTripleChecker+Valid, 6916 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:50,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3770 Valid, 6916 Invalid, 724 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 21:09:50,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2023-11-23 21:09:50,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 2002. [2023-11-23 21:09:50,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2002 states, 1942 states have (on average 1.9114315139031925) internal successors, (3712), 1945 states have internal predecessors, (3712), 46 states have call successors, (46), 12 states have call predecessors, (46), 12 states have return successors, (46), 45 states have call predecessors, (46), 46 states have call successors, (46) [2023-11-23 21:09:50,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2002 states to 2002 states and 3804 transitions. [2023-11-23 21:09:50,439 INFO L78 Accepts]: Start accepts. Automaton has 2002 states and 3804 transitions. Word has length 64 [2023-11-23 21:09:50,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:50,440 INFO L495 AbstractCegarLoop]: Abstraction has 2002 states and 3804 transitions. [2023-11-23 21:09:50,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:09:50,441 INFO L276 IsEmpty]: Start isEmpty. Operand 2002 states and 3804 transitions. [2023-11-23 21:09:50,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-23 21:09:50,451 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:50,451 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:50,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:09:50,452 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:50,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:50,453 INFO L85 PathProgramCache]: Analyzing trace with hash 158254474, now seen corresponding path program 1 times [2023-11-23 21:09:50,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:50,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36473794] [2023-11-23 21:09:50,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:50,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:50,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:50,850 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 21:09:50,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:50,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36473794] [2023-11-23 21:09:50,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36473794] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:09:50,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89539429] [2023-11-23 21:09:50,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:50,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:50,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:50,854 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:09:50,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:09:51,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:51,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:09:51,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:51,247 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-23 21:09:51,247 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:09:51,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89539429] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:51,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:09:51,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-23 21:09:51,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107139684] [2023-11-23 21:09:51,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:51,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:09:51,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:51,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:09:51,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:09:51,251 INFO L87 Difference]: Start difference. First operand 2002 states and 3804 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 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) [2023-11-23 21:09:51,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:51,971 INFO L93 Difference]: Finished difference Result 2707 states and 4877 transitions. [2023-11-23 21:09:51,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:09:51,972 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 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 130 [2023-11-23 21:09:51,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:52,008 INFO L225 Difference]: With dead ends: 2707 [2023-11-23 21:09:52,009 INFO L226 Difference]: Without dead ends: 2351 [2023-11-23 21:09:52,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:09:52,012 INFO L413 NwaCegarLoop]: 3337 mSDtfsCounter, 3501 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3501 SdHoareTripleChecker+Valid, 3559 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:52,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3501 Valid, 3559 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:09:52,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2023-11-23 21:09:52,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 2347. [2023-11-23 21:09:52,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2235 states have (on average 1.8527964205816554) internal successors, (4141), 2239 states have internal predecessors, (4141), 86 states have call successors, (86), 24 states have call predecessors, (86), 24 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2023-11-23 21:09:52,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 4313 transitions. [2023-11-23 21:09:52,179 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 4313 transitions. Word has length 130 [2023-11-23 21:09:52,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:52,180 INFO L495 AbstractCegarLoop]: Abstraction has 2347 states and 4313 transitions. [2023-11-23 21:09:52,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 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) [2023-11-23 21:09:52,180 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 4313 transitions. [2023-11-23 21:09:52,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-23 21:09:52,185 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:52,185 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:52,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:09:52,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:52,396 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:52,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:52,397 INFO L85 PathProgramCache]: Analyzing trace with hash -944954616, now seen corresponding path program 1 times [2023-11-23 21:09:52,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:52,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311279024] [2023-11-23 21:09:52,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:52,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:52,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:52,659 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 21:09:52,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:52,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311279024] [2023-11-23 21:09:52,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311279024] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:09:52,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778164550] [2023-11-23 21:09:52,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:52,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:52,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:52,671 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:09:52,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:09:52,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:52,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:09:52,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:53,041 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-23 21:09:53,041 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:09:53,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778164550] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:53,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:09:53,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-23 21:09:53,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762242526] [2023-11-23 21:09:53,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:53,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:09:53,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:53,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:09:53,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:09:53,045 INFO L87 Difference]: Start difference. First operand 2347 states and 4313 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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) [2023-11-23 21:09:53,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:53,726 INFO L93 Difference]: Finished difference Result 3736 states and 6420 transitions. [2023-11-23 21:09:53,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:09:53,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 130 [2023-11-23 21:09:53,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:53,749 INFO L225 Difference]: With dead ends: 3736 [2023-11-23 21:09:53,750 INFO L226 Difference]: Without dead ends: 3035 [2023-11-23 21:09:53,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:09:53,759 INFO L413 NwaCegarLoop]: 3317 mSDtfsCounter, 3519 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3519 SdHoareTripleChecker+Valid, 3539 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:53,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3519 Valid, 3539 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:09:53,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3035 states. [2023-11-23 21:09:53,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3035 to 3029. [2023-11-23 21:09:53,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3029 states, 2815 states have (on average 1.7715808170515097) internal successors, (4987), 2821 states have internal predecessors, (4987), 164 states have call successors, (164), 48 states have call predecessors, (164), 48 states have return successors, (164), 160 states have call predecessors, (164), 164 states have call successors, (164) [2023-11-23 21:09:53,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3029 states to 3029 states and 5315 transitions. [2023-11-23 21:09:53,905 INFO L78 Accepts]: Start accepts. Automaton has 3029 states and 5315 transitions. Word has length 130 [2023-11-23 21:09:53,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:53,906 INFO L495 AbstractCegarLoop]: Abstraction has 3029 states and 5315 transitions. [2023-11-23 21:09:53,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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) [2023-11-23 21:09:53,906 INFO L276 IsEmpty]: Start isEmpty. Operand 3029 states and 5315 transitions. [2023-11-23 21:09:53,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-23 21:09:53,912 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:53,913 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:53,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:09:54,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:54,136 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:54,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:54,137 INFO L85 PathProgramCache]: Analyzing trace with hash -775267066, now seen corresponding path program 1 times [2023-11-23 21:09:54,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:54,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227188317] [2023-11-23 21:09:54,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:54,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:54,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:54,353 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 21:09:54,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:54,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227188317] [2023-11-23 21:09:54,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227188317] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:09:54,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350176281] [2023-11-23 21:09:54,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:54,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:54,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:54,364 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:09:54,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:09:54,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:54,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 957 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:09:54,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:54,704 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-23 21:09:54,704 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:09:54,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350176281] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:54,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:09:54,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-23 21:09:54,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175062412] [2023-11-23 21:09:54,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:54,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:09:54,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:54,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:09:54,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:09:54,708 INFO L87 Difference]: Start difference. First operand 3029 states and 5315 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 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) [2023-11-23 21:09:55,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:55,327 INFO L93 Difference]: Finished difference Result 5770 states and 9456 transitions. [2023-11-23 21:09:55,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:09:55,329 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 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 130 [2023-11-23 21:09:55,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:55,360 INFO L225 Difference]: With dead ends: 5770 [2023-11-23 21:09:55,360 INFO L226 Difference]: Without dead ends: 4387 [2023-11-23 21:09:55,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:09:55,370 INFO L413 NwaCegarLoop]: 3286 mSDtfsCounter, 3513 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3513 SdHoareTripleChecker+Valid, 3508 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:55,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3513 Valid, 3508 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:09:55,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4387 states. [2023-11-23 21:09:55,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4387 to 4377. [2023-11-23 21:09:55,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4377 states, 3963 states have (on average 1.679283371183447) internal successors, (6655), 3973 states have internal predecessors, (6655), 316 states have call successors, (316), 96 states have call predecessors, (316), 96 states have return successors, (316), 308 states have call predecessors, (316), 316 states have call successors, (316) [2023-11-23 21:09:55,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4377 states to 4377 states and 7287 transitions. [2023-11-23 21:09:55,570 INFO L78 Accepts]: Start accepts. Automaton has 4377 states and 7287 transitions. Word has length 130 [2023-11-23 21:09:55,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:55,571 INFO L495 AbstractCegarLoop]: Abstraction has 4377 states and 7287 transitions. [2023-11-23 21:09:55,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 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) [2023-11-23 21:09:55,571 INFO L276 IsEmpty]: Start isEmpty. Operand 4377 states and 7287 transitions. [2023-11-23 21:09:55,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-23 21:09:55,594 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:55,595 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:55,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:09:55,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:55,818 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:55,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:55,818 INFO L85 PathProgramCache]: Analyzing trace with hash 551710084, now seen corresponding path program 1 times [2023-11-23 21:09:55,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:55,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180271588] [2023-11-23 21:09:55,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:55,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:55,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:56,032 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 21:09:56,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:56,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180271588] [2023-11-23 21:09:56,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180271588] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:09:56,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301416404] [2023-11-23 21:09:56,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:56,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:56,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:56,037 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:09:56,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:09:56,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:56,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 951 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:09:56,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:56,552 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-23 21:09:56,552 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:09:56,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301416404] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:56,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:09:56,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-23 21:09:56,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070055963] [2023-11-23 21:09:56,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:56,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:09:56,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:56,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:09:56,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:09:56,558 INFO L87 Difference]: Start difference. First operand 4377 states and 7287 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 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) [2023-11-23 21:09:57,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:57,396 INFO L93 Difference]: Finished difference Result 9790 states and 15428 transitions. [2023-11-23 21:09:57,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:09:57,397 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 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 130 [2023-11-23 21:09:57,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:57,453 INFO L225 Difference]: With dead ends: 9790 [2023-11-23 21:09:57,453 INFO L226 Difference]: Without dead ends: 7059 [2023-11-23 21:09:57,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:09:57,472 INFO L413 NwaCegarLoop]: 3286 mSDtfsCounter, 3522 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3522 SdHoareTripleChecker+Valid, 3508 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:57,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3522 Valid, 3508 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:09:57,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7059 states. [2023-11-23 21:09:57,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7059 to 7041. [2023-11-23 21:09:57,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7041 states, 6235 states have (on average 1.5947072975140337) internal successors, (9943), 6253 states have internal predecessors, (9943), 612 states have call successors, (612), 192 states have call predecessors, (612), 192 states have return successors, (612), 596 states have call predecessors, (612), 612 states have call successors, (612) [2023-11-23 21:09:57,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7041 states to 7041 states and 11167 transitions. [2023-11-23 21:09:57,889 INFO L78 Accepts]: Start accepts. Automaton has 7041 states and 11167 transitions. Word has length 130 [2023-11-23 21:09:57,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:57,889 INFO L495 AbstractCegarLoop]: Abstraction has 7041 states and 11167 transitions. [2023-11-23 21:09:57,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 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) [2023-11-23 21:09:57,891 INFO L276 IsEmpty]: Start isEmpty. Operand 7041 states and 11167 transitions. [2023-11-23 21:09:57,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-23 21:09:57,908 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:57,908 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:57,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 21:09:58,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:58,131 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:09:58,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:58,131 INFO L85 PathProgramCache]: Analyzing trace with hash 537004742, now seen corresponding path program 1 times [2023-11-23 21:09:58,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:58,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785926624] [2023-11-23 21:09:58,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:58,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:58,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:58,398 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 21:09:58,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:58,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785926624] [2023-11-23 21:09:58,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785926624] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:09:58,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598949569] [2023-11-23 21:09:58,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:58,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:58,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:58,401 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:09:58,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 21:09:58,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:58,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 945 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:09:58,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:58,736 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 21:09:58,737 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:09:58,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598949569] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:58,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:09:58,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-23 21:09:58,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635562898] [2023-11-23 21:09:58,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:58,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:09:58,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:58,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:09:58,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:09:58,742 INFO L87 Difference]: Start difference. First operand 7041 states and 11167 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 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) [2023-11-23 21:09:59,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:59,706 INFO L93 Difference]: Finished difference Result 17734 states and 27172 transitions. [2023-11-23 21:09:59,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:09:59,706 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 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 130 [2023-11-23 21:09:59,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:59,813 INFO L225 Difference]: With dead ends: 17734 [2023-11-23 21:09:59,814 INFO L226 Difference]: Without dead ends: 12339 [2023-11-23 21:09:59,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:09:59,842 INFO L413 NwaCegarLoop]: 3304 mSDtfsCounter, 3495 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3495 SdHoareTripleChecker+Valid, 3526 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:59,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3495 Valid, 3526 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:09:59,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12339 states. [2023-11-23 21:10:00,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12339 to 12305. [2023-11-23 21:10:00,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12305 states, 10731 states have (on average 1.5304258689777281) internal successors, (16423), 10765 states have internal predecessors, (16423), 1188 states have call successors, (1188), 384 states have call predecessors, (1188), 384 states have return successors, (1188), 1156 states have call predecessors, (1188), 1188 states have call successors, (1188) [2023-11-23 21:10:00,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12305 states to 12305 states and 18799 transitions. [2023-11-23 21:10:00,524 INFO L78 Accepts]: Start accepts. Automaton has 12305 states and 18799 transitions. Word has length 130 [2023-11-23 21:10:00,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:10:00,525 INFO L495 AbstractCegarLoop]: Abstraction has 12305 states and 18799 transitions. [2023-11-23 21:10:00,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 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) [2023-11-23 21:10:00,526 INFO L276 IsEmpty]: Start isEmpty. Operand 12305 states and 18799 transitions. [2023-11-23 21:10:00,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-23 21:10:00,553 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:10:00,553 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:10:00,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 21:10:00,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:10:00,777 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:10:00,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:10:00,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1917067580, now seen corresponding path program 1 times [2023-11-23 21:10:00,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:10:00,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506049193] [2023-11-23 21:10:00,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:10:00,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:10:00,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:10:00,991 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 21:10:00,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:10:00,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506049193] [2023-11-23 21:10:00,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506049193] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:10:00,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502273189] [2023-11-23 21:10:00,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:10:00,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:10:00,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:10:00,993 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:10:01,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 21:10:01,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:10:01,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 939 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:10:01,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:10:01,296 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-23 21:10:01,296 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:10:01,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502273189] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:10:01,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:10:01,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-23 21:10:01,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423578070] [2023-11-23 21:10:01,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:10:01,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:10:01,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:10:01,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:10:01,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:10:01,299 INFO L87 Difference]: Start difference. First operand 12305 states and 18799 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 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) [2023-11-23 21:10:02,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:10:02,477 INFO L93 Difference]: Finished difference Result 33430 states and 50260 transitions. [2023-11-23 21:10:02,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:10:02,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 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 130 [2023-11-23 21:10:02,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:10:02,568 INFO L225 Difference]: With dead ends: 33430 [2023-11-23 21:10:02,569 INFO L226 Difference]: Without dead ends: 22771 [2023-11-23 21:10:02,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:10:02,610 INFO L413 NwaCegarLoop]: 3304 mSDtfsCounter, 3507 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3507 SdHoareTripleChecker+Valid, 3526 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:10:02,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3507 Valid, 3526 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:10:02,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22771 states. [2023-11-23 21:10:03,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22771 to 22705. [2023-11-23 21:10:03,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22705 states, 19627 states have (on average 1.4872879197024507) internal successors, (29191), 19693 states have internal predecessors, (29191), 2308 states have call successors, (2308), 768 states have call predecessors, (2308), 768 states have return successors, (2308), 2244 states have call predecessors, (2308), 2308 states have call successors, (2308) [2023-11-23 21:10:03,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22705 states to 22705 states and 33807 transitions. [2023-11-23 21:10:03,557 INFO L78 Accepts]: Start accepts. Automaton has 22705 states and 33807 transitions. Word has length 130 [2023-11-23 21:10:03,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:10:03,557 INFO L495 AbstractCegarLoop]: Abstraction has 22705 states and 33807 transitions. [2023-11-23 21:10:03,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 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) [2023-11-23 21:10:03,558 INFO L276 IsEmpty]: Start isEmpty. Operand 22705 states and 33807 transitions. [2023-11-23 21:10:03,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-23 21:10:03,602 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:10:03,602 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:10:03,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 21:10:03,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224dc1ec-01eb-4ef2-843e-873ce54018b0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:10:03,824 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:10:03,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:10:03,824 INFO L85 PathProgramCache]: Analyzing trace with hash -766401086, now seen corresponding path program 1 times [2023-11-23 21:10:03,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:10:03,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047720982] [2023-11-23 21:10:03,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:10:03,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:10:04,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:10:04,656 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-23 21:10:04,656 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:10:04,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047720982] [2023-11-23 21:10:04,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047720982] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:10:04,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:10:04,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:10:04,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501697029] [2023-11-23 21:10:04,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:10:04,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:10:04,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:10:04,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:10:04,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:10:04,659 INFO L87 Difference]: Start difference. First operand 22705 states and 33807 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-23 21:10:07,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:10:07,492 INFO L93 Difference]: Finished difference Result 68021 states and 100113 transitions. [2023-11-23 21:10:07,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 21:10:07,493 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 130 [2023-11-23 21:10:07,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:10:07,736 INFO L225 Difference]: With dead ends: 68021 [2023-11-23 21:10:07,737 INFO L226 Difference]: Without dead ends: 46963 [2023-11-23 21:10:07,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-23 21:10:07,813 INFO L413 NwaCegarLoop]: 3316 mSDtfsCounter, 4034 mSDsluCounter, 6553 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4054 SdHoareTripleChecker+Valid, 9869 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:10:07,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4054 Valid, 9869 Invalid, 1027 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [103 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 21:10:07,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46963 states. [2023-11-23 21:10:10,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46963 to 42993. [2023-11-23 21:10:10,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42993 states, 36971 states have (on average 1.4594952800843906) internal successors, (53959), 37101 states have internal predecessors, (53959), 4484 states have call successors, (4484), 1536 states have call predecessors, (4484), 1536 states have return successors, (4484), 4356 states have call predecessors, (4484), 4484 states have call successors, (4484)