./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.06.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.06.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ --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 52e4ee61a76abd07bd19c87e00a938922ca891ef038e845cba6c6b4d21ef1798 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:13:19,479 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:13:19,552 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:13:19,558 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:13:19,558 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:13:19,586 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:13:19,587 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:13:19,588 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:13:19,589 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:13:19,589 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:13:19,590 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:13:19,591 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:13:19,591 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:13:19,592 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:13:19,593 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:13:19,593 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:13:19,594 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:13:19,595 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:13:19,595 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:13:19,596 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:13:19,596 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:13:19,597 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:13:19,598 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:13:19,598 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:13:19,599 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:13:19,599 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:13:19,600 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:13:19,600 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:13:19,601 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:13:19,601 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:13:19,602 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:13:19,602 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:13:19,603 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:13:19,603 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:13:19,604 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:13:19,605 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:13:19,605 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:13:19,606 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:13:19,607 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:13:19,607 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:13:19,608 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:13:19,608 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:13:19,609 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:13:19,609 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:13:19,610 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:13:19,610 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_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52e4ee61a76abd07bd19c87e00a938922ca891ef038e845cba6c6b4d21ef1798 [2023-11-19 04:13:19,863 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:13:19,888 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:13:19,891 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:13:19,893 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:13:19,894 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:13:19,896 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.06.cil-1.c [2023-11-19 04:13:23,162 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:13:24,060 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:13:24,061 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/sv-benchmarks/c/combinations/Problem05_label42+token_ring.06.cil-1.c [2023-11-19 04:13:24,137 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ/data/71ddf0c90/3ef41603191043d5aedb4891585400ea/FLAGdb277bf9e [2023-11-19 04:13:24,155 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ/data/71ddf0c90/3ef41603191043d5aedb4891585400ea [2023-11-19 04:13:24,164 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:13:24,166 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:13:24,170 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:13:24,170 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:13:24,176 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:13:24,177 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:13:24" (1/1) ... [2023-11-19 04:13:24,178 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@764e5649 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:24, skipping insertion in model container [2023-11-19 04:13:24,179 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:13:24" (1/1) ... [2023-11-19 04:13:24,532 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:13:26,759 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_1c93f771-d6a8-4000-8048-07534a12a2bb/sv-benchmarks/c/combinations/Problem05_label42+token_ring.06.cil-1.c[378560,378573] [2023-11-19 04:13:26,799 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_1c93f771-d6a8-4000-8048-07534a12a2bb/sv-benchmarks/c/combinations/Problem05_label42+token_ring.06.cil-1.c[383339,383352] [2023-11-19 04:13:27,069 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:13:27,086 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:13:28,466 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_1c93f771-d6a8-4000-8048-07534a12a2bb/sv-benchmarks/c/combinations/Problem05_label42+token_ring.06.cil-1.c[378560,378573] [2023-11-19 04:13:28,488 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_1c93f771-d6a8-4000-8048-07534a12a2bb/sv-benchmarks/c/combinations/Problem05_label42+token_ring.06.cil-1.c[383339,383352] [2023-11-19 04:13:28,512 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:13:28,603 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:13:28,604 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:28 WrapperNode [2023-11-19 04:13:28,604 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:13:28,605 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:13:28,606 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:13:28,606 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:13:28,614 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:28" (1/1) ... [2023-11-19 04:13:28,714 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:28" (1/1) ... [2023-11-19 04:13:29,223 INFO L138 Inliner]: procedures = 56, calls = 60, calls flagged for inlining = 33, calls inlined = 33, statements flattened = 12874 [2023-11-19 04:13:29,223 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:13:29,224 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:13:29,224 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:13:29,224 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:13:29,234 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:28" (1/1) ... [2023-11-19 04:13:29,235 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:28" (1/1) ... [2023-11-19 04:13:29,313 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:28" (1/1) ... [2023-11-19 04:13:29,313 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:28" (1/1) ... [2023-11-19 04:13:29,634 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:28" (1/1) ... [2023-11-19 04:13:29,690 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:28" (1/1) ... [2023-11-19 04:13:29,724 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:28" (1/1) ... [2023-11-19 04:13:29,811 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:28" (1/1) ... [2023-11-19 04:13:29,920 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:13:29,922 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:13:29,922 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:13:29,923 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:13:29,924 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:28" (1/1) ... [2023-11-19 04:13:29,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:13:29,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:13:29,958 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:13:30,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:13:30,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:13:30,087 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-19 04:13:30,087 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-19 04:13:30,087 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-19 04:13:30,087 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-19 04:13:30,088 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-19 04:13:30,088 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-19 04:13:30,088 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-11-19 04:13:30,088 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-11-19 04:13:30,088 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-19 04:13:30,089 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-19 04:13:30,089 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-19 04:13:30,089 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-19 04:13:30,089 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-19 04:13:30,089 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-19 04:13:30,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:13:30,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:13:30,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:13:30,295 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:13:30,297 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:13:39,602 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:13:42,152 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:13:42,153 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-19 04:13:42,174 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:13:42 BoogieIcfgContainer [2023-11-19 04:13:42,174 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:13:42,178 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:13:42,178 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:13:42,181 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:13:42,181 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:13:24" (1/3) ... [2023-11-19 04:13:42,183 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74a13901 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:13:42, skipping insertion in model container [2023-11-19 04:13:42,183 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:28" (2/3) ... [2023-11-19 04:13:42,184 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74a13901 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:13:42, skipping insertion in model container [2023-11-19 04:13:42,184 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:13:42" (3/3) ... [2023-11-19 04:13:42,185 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label42+token_ring.06.cil-1.c [2023-11-19 04:13:42,204 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:13:42,204 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-19 04:13:42,305 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:13:42,312 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;@6ad1fcd8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:13:42,313 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-19 04:13:42,326 INFO L276 IsEmpty]: Start isEmpty. Operand has 1778 states, 1746 states have (on average 1.9644902634593355) internal successors, (3430), 1751 states have internal predecessors, (3430), 22 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-19 04:13:42,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-19 04:13:42,341 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:13:42,342 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] [2023-11-19 04:13:42,343 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:13:42,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:13:42,349 INFO L85 PathProgramCache]: Analyzing trace with hash -828550917, now seen corresponding path program 1 times [2023-11-19 04:13:42,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:13:42,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654408065] [2023-11-19 04:13:42,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:42,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:13:42,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:13:42,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:13:42,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:13:42,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654408065] [2023-11-19 04:13:42,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654408065] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:13:42,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:13:42,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:13:42,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938799284] [2023-11-19 04:13:42,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:13:42,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:13:42,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:13:43,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:13:43,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:13:43,040 INFO L87 Difference]: Start difference. First operand has 1778 states, 1746 states have (on average 1.9644902634593355) internal successors, (3430), 1751 states have internal predecessors, (3430), 22 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 04:13:44,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:13:44,002 INFO L93 Difference]: Finished difference Result 3667 states and 7132 transitions. [2023-11-19 04:13:44,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:13:44,005 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2023-11-19 04:13:44,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:13:44,035 INFO L225 Difference]: With dead ends: 3667 [2023-11-19 04:13:44,036 INFO L226 Difference]: Without dead ends: 1888 [2023-11-19 04:13:44,047 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 [2023-11-19 04:13:44,052 INFO L413 NwaCegarLoop]: 3352 mSDtfsCounter, 3603 mSDsluCounter, 3276 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3603 SdHoareTripleChecker+Valid, 6628 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 04:13:44,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3603 Valid, 6628 Invalid, 648 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 04:13:44,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2023-11-19 04:13:44,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 1887. [2023-11-19 04:13:44,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1835 states have (on average 1.9335149863760217) internal successors, (3548), 1839 states have internal predecessors, (3548), 38 states have call successors, (38), 13 states have call predecessors, (38), 12 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2023-11-19 04:13:44,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 3622 transitions. [2023-11-19 04:13:44,207 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 3622 transitions. Word has length 50 [2023-11-19 04:13:44,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:13:44,208 INFO L495 AbstractCegarLoop]: Abstraction has 1887 states and 3622 transitions. [2023-11-19 04:13:44,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 04:13:44,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 3622 transitions. [2023-11-19 04:13:44,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-19 04:13:44,215 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:13:44,216 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:13:44,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:13:44,216 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:13:44,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:13:44,217 INFO L85 PathProgramCache]: Analyzing trace with hash -332843677, now seen corresponding path program 1 times [2023-11-19 04:13:44,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:13:44,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485870603] [2023-11-19 04:13:44,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:44,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:13:44,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:13:44,534 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 04:13:44,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:13:44,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485870603] [2023-11-19 04:13:44,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485870603] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:13:44,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925398119] [2023-11-19 04:13:44,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:44,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:13:44,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:13:44,541 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:13:44,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:13:44,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:13:44,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:13:44,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:13:44,820 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 04:13:44,820 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:13:44,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925398119] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:13:44,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:13:44,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 04:13:44,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198264246] [2023-11-19 04:13:44,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:13:44,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:13:44,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:13:44,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:13:44,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:13:44,825 INFO L87 Difference]: Start difference. First operand 1887 states and 3622 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 04:13:45,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:13:45,295 INFO L93 Difference]: Finished difference Result 2362 states and 4321 transitions. [2023-11-19 04:13:45,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:13:45,296 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 96 [2023-11-19 04:13:45,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:13:45,315 INFO L225 Difference]: With dead ends: 2362 [2023-11-19 04:13:45,316 INFO L226 Difference]: Without dead ends: 2121 [2023-11-19 04:13:45,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:13:45,320 INFO L413 NwaCegarLoop]: 3261 mSDtfsCounter, 3426 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3426 SdHoareTripleChecker+Valid, 3410 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:13:45,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3426 Valid, 3410 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:13:45,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2121 states. [2023-11-19 04:13:45,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2121 to 2115. [2023-11-19 04:13:45,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2115 states, 2021 states have (on average 1.8866897575457695) internal successors, (3813), 2026 states have internal predecessors, (3813), 68 states have call successors, (68), 25 states have call predecessors, (68), 24 states have return successors, (66), 64 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-19 04:13:45,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2115 states to 2115 states and 3947 transitions. [2023-11-19 04:13:45,417 INFO L78 Accepts]: Start accepts. Automaton has 2115 states and 3947 transitions. Word has length 96 [2023-11-19 04:13:45,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:13:45,417 INFO L495 AbstractCegarLoop]: Abstraction has 2115 states and 3947 transitions. [2023-11-19 04:13:45,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 04:13:45,418 INFO L276 IsEmpty]: Start isEmpty. Operand 2115 states and 3947 transitions. [2023-11-19 04:13:45,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-19 04:13:45,424 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:13:45,424 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:13:45,450 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 04:13:45,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:13:45,644 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:13:45,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:13:45,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1197558205, now seen corresponding path program 1 times [2023-11-19 04:13:45,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:13:45,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655684250] [2023-11-19 04:13:45,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:45,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:13:45,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:13:45,850 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 04:13:45,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:13:45,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655684250] [2023-11-19 04:13:45,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655684250] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:13:45,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934817775] [2023-11-19 04:13:45,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:45,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:13:45,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:13:45,853 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:13:45,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:13:46,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:13:46,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:13:46,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:13:46,089 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-19 04:13:46,090 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:13:46,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934817775] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:13:46,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:13:46,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 04:13:46,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101188932] [2023-11-19 04:13:46,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:13:46,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:13:46,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:13:46,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:13:46,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:13:46,093 INFO L87 Difference]: Start difference. First operand 2115 states and 3947 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 04:13:46,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:13:46,778 INFO L93 Difference]: Finished difference Result 3040 states and 5302 transitions. [2023-11-19 04:13:46,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:13:46,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 96 [2023-11-19 04:13:46,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:13:46,799 INFO L225 Difference]: With dead ends: 3040 [2023-11-19 04:13:46,799 INFO L226 Difference]: Without dead ends: 2571 [2023-11-19 04:13:46,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:13:46,804 INFO L413 NwaCegarLoop]: 3259 mSDtfsCounter, 3432 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3432 SdHoareTripleChecker+Valid, 3408 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 04:13:46,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3432 Valid, 3408 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 04:13:46,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2023-11-19 04:13:46,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 2563. [2023-11-19 04:13:46,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 2387 states have (on average 1.8144113950565564) internal successors, (4331), 2394 states have internal predecessors, (4331), 126 states have call successors, (126), 49 states have call predecessors, (126), 48 states have return successors, (124), 120 states have call predecessors, (124), 124 states have call successors, (124) [2023-11-19 04:13:46,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 4581 transitions. [2023-11-19 04:13:46,918 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 4581 transitions. Word has length 96 [2023-11-19 04:13:46,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:13:46,920 INFO L495 AbstractCegarLoop]: Abstraction has 2563 states and 4581 transitions. [2023-11-19 04:13:46,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 04:13:46,920 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 4581 transitions. [2023-11-19 04:13:46,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-19 04:13:46,925 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:13:46,925 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:13:46,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:13:47,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:13:47,146 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:13:47,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:13:47,146 INFO L85 PathProgramCache]: Analyzing trace with hash 6819619, now seen corresponding path program 1 times [2023-11-19 04:13:47,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:13:47,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858663784] [2023-11-19 04:13:47,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:47,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:13:47,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:13:47,321 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 04:13:47,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:13:47,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858663784] [2023-11-19 04:13:47,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858663784] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:13:47,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649195410] [2023-11-19 04:13:47,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:47,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:13:47,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:13:47,327 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:13:47,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:13:47,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:13:47,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:13:47,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:13:47,584 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-19 04:13:47,584 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:13:47,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649195410] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:13:47,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:13:47,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 04:13:47,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902320280] [2023-11-19 04:13:47,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:13:47,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:13:47,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:13:47,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:13:47,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:13:47,587 INFO L87 Difference]: Start difference. First operand 2563 states and 4581 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 2 states have internal predecessors, (59), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 04:13:48,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:13:48,138 INFO L93 Difference]: Finished difference Result 4372 states and 7214 transitions. [2023-11-19 04:13:48,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:13:48,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 2 states have internal predecessors, (59), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 96 [2023-11-19 04:13:48,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:13:48,164 INFO L225 Difference]: With dead ends: 4372 [2023-11-19 04:13:48,164 INFO L226 Difference]: Without dead ends: 3455 [2023-11-19 04:13:48,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:13:48,173 INFO L413 NwaCegarLoop]: 3257 mSDtfsCounter, 3435 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3435 SdHoareTripleChecker+Valid, 3406 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:13:48,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3435 Valid, 3406 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:13:48,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3455 states. [2023-11-19 04:13:48,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3455 to 3443. [2023-11-19 04:13:48,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3443 states, 3107 states have (on average 1.7196652719665273) internal successors, (5343), 3118 states have internal predecessors, (5343), 238 states have call successors, (238), 97 states have call predecessors, (238), 96 states have return successors, (236), 228 states have call predecessors, (236), 236 states have call successors, (236) [2023-11-19 04:13:48,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3443 states to 3443 states and 5817 transitions. [2023-11-19 04:13:48,355 INFO L78 Accepts]: Start accepts. Automaton has 3443 states and 5817 transitions. Word has length 96 [2023-11-19 04:13:48,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:13:48,355 INFO L495 AbstractCegarLoop]: Abstraction has 3443 states and 5817 transitions. [2023-11-19 04:13:48,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 2 states have internal predecessors, (59), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 04:13:48,357 INFO L276 IsEmpty]: Start isEmpty. Operand 3443 states and 5817 transitions. [2023-11-19 04:13:48,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-19 04:13:48,369 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:13:48,369 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:13:48,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 04:13:48,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:13:48,591 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:13:48,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:13:48,591 INFO L85 PathProgramCache]: Analyzing trace with hash -530216381, now seen corresponding path program 1 times [2023-11-19 04:13:48,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:13:48,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152805991] [2023-11-19 04:13:48,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:48,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:13:48,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:13:48,719 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-19 04:13:48,719 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:13:48,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152805991] [2023-11-19 04:13:48,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152805991] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:13:48,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:13:48,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:13:48,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572182909] [2023-11-19 04:13:48,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:13:48,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:13:48,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:13:48,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:13:48,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:13:48,726 INFO L87 Difference]: Start difference. First operand 3443 states and 5817 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 04:13:49,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:13:49,364 INFO L93 Difference]: Finished difference Result 4871 states and 7892 transitions. [2023-11-19 04:13:49,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:13:49,370 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 96 [2023-11-19 04:13:49,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:13:49,398 INFO L225 Difference]: With dead ends: 4871 [2023-11-19 04:13:49,398 INFO L226 Difference]: Without dead ends: 3939 [2023-11-19 04:13:49,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:13:49,403 INFO L413 NwaCegarLoop]: 3297 mSDtfsCounter, 79 mSDsluCounter, 3220 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 6517 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 04:13:49,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 6517 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 04:13:49,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3939 states. [2023-11-19 04:13:49,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3939 to 3783. [2023-11-19 04:13:49,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3783 states, 3431 states have (on average 1.7064995628096764) internal successors, (5855), 3442 states have internal predecessors, (5855), 246 states have call successors, (246), 105 states have call predecessors, (246), 104 states have return successors, (244), 236 states have call predecessors, (244), 244 states have call successors, (244) [2023-11-19 04:13:49,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3783 states to 3783 states and 6345 transitions. [2023-11-19 04:13:49,559 INFO L78 Accepts]: Start accepts. Automaton has 3783 states and 6345 transitions. Word has length 96 [2023-11-19 04:13:49,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:13:49,560 INFO L495 AbstractCegarLoop]: Abstraction has 3783 states and 6345 transitions. [2023-11-19 04:13:49,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 04:13:49,560 INFO L276 IsEmpty]: Start isEmpty. Operand 3783 states and 6345 transitions. [2023-11-19 04:13:49,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-19 04:13:49,569 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:13:49,569 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:13:49,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 04:13:49,569 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:13:49,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:13:49,570 INFO L85 PathProgramCache]: Analyzing trace with hash 102846710, now seen corresponding path program 1 times [2023-11-19 04:13:49,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:13:49,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886592482] [2023-11-19 04:13:49,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:49,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:13:49,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:13:49,672 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-11-19 04:13:49,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:13:49,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886592482] [2023-11-19 04:13:49,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886592482] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:13:49,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:13:49,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:13:49,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522438501] [2023-11-19 04:13:49,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:13:49,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:13:49,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:13:49,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:13:49,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:13:49,675 INFO L87 Difference]: Start difference. First operand 3783 states and 6345 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 04:13:50,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:13:50,250 INFO L93 Difference]: Finished difference Result 7984 states and 12474 transitions. [2023-11-19 04:13:50,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:13:50,251 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 129 [2023-11-19 04:13:50,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:13:50,290 INFO L225 Difference]: With dead ends: 7984 [2023-11-19 04:13:50,290 INFO L226 Difference]: Without dead ends: 5847 [2023-11-19 04:13:50,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:13:50,300 INFO L413 NwaCegarLoop]: 3215 mSDtfsCounter, 3423 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3423 SdHoareTripleChecker+Valid, 3364 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:13:50,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3423 Valid, 3364 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:13:50,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5847 states. [2023-11-19 04:13:50,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5847 to 5819. [2023-11-19 04:13:50,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5819 states, 5139 states have (on average 1.6110138159174936) internal successors, (8279), 5158 states have internal predecessors, (8279), 470 states have call successors, (470), 209 states have call predecessors, (470), 208 states have return successors, (468), 452 states have call predecessors, (468), 468 states have call successors, (468) [2023-11-19 04:13:50,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5819 states to 5819 states and 9217 transitions. [2023-11-19 04:13:50,708 INFO L78 Accepts]: Start accepts. Automaton has 5819 states and 9217 transitions. Word has length 129 [2023-11-19 04:13:50,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:13:50,710 INFO L495 AbstractCegarLoop]: Abstraction has 5819 states and 9217 transitions. [2023-11-19 04:13:50,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 04:13:50,711 INFO L276 IsEmpty]: Start isEmpty. Operand 5819 states and 9217 transitions. [2023-11-19 04:13:50,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-19 04:13:50,727 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:13:50,727 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:13:50,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 04:13:50,728 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:13:50,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:13:50,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1920403360, now seen corresponding path program 1 times [2023-11-19 04:13:50,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:13:50,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952595703] [2023-11-19 04:13:50,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:50,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:13:50,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:13:50,870 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-11-19 04:13:50,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:13:50,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952595703] [2023-11-19 04:13:50,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952595703] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:13:50,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:13:50,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:13:50,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639309243] [2023-11-19 04:13:50,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:13:50,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:13:50,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:13:50,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:13:50,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:13:50,874 INFO L87 Difference]: Start difference. First operand 5819 states and 9217 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 04:13:51,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:13:51,682 INFO L93 Difference]: Finished difference Result 14020 states and 21066 transitions. [2023-11-19 04:13:51,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:13:51,682 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 129 [2023-11-19 04:13:51,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:13:51,759 INFO L225 Difference]: With dead ends: 14020 [2023-11-19 04:13:51,759 INFO L226 Difference]: Without dead ends: 9847 [2023-11-19 04:13:51,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:13:51,782 INFO L413 NwaCegarLoop]: 3215 mSDtfsCounter, 3425 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3425 SdHoareTripleChecker+Valid, 3364 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:13:51,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3425 Valid, 3364 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:13:51,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9847 states. [2023-11-19 04:13:52,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9847 to 9795. [2023-11-19 04:13:52,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9795 states, 8475 states have (on average 1.5300294985250738) internal successors, (12967), 8510 states have internal predecessors, (12967), 902 states have call successors, (902), 417 states have call predecessors, (902), 416 states have return successors, (900), 868 states have call predecessors, (900), 900 states have call successors, (900) [2023-11-19 04:13:52,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9795 states to 9795 states and 14769 transitions. [2023-11-19 04:13:52,330 INFO L78 Accepts]: Start accepts. Automaton has 9795 states and 14769 transitions. Word has length 129 [2023-11-19 04:13:52,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:13:52,330 INFO L495 AbstractCegarLoop]: Abstraction has 9795 states and 14769 transitions. [2023-11-19 04:13:52,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 04:13:52,331 INFO L276 IsEmpty]: Start isEmpty. Operand 9795 states and 14769 transitions. [2023-11-19 04:13:52,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-19 04:13:52,362 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:13:52,363 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:13:52,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 04:13:52,363 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:13:52,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:13:52,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1457383483, now seen corresponding path program 1 times [2023-11-19 04:13:52,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:13:52,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388372121] [2023-11-19 04:13:52,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:52,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:13:52,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:13:52,484 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-11-19 04:13:52,484 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:13:52,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388372121] [2023-11-19 04:13:52,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388372121] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:13:52,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:13:52,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:13:52,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898855762] [2023-11-19 04:13:52,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:13:52,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:13:52,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:13:52,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:13:52,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:13:52,487 INFO L87 Difference]: Start difference. First operand 9795 states and 14769 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 04:13:53,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:13:53,682 INFO L93 Difference]: Finished difference Result 25804 states and 37658 transitions. [2023-11-19 04:13:53,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:13:53,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 129 [2023-11-19 04:13:53,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:13:53,744 INFO L225 Difference]: With dead ends: 25804 [2023-11-19 04:13:53,744 INFO L226 Difference]: Without dead ends: 17655 [2023-11-19 04:13:53,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:13:53,771 INFO L413 NwaCegarLoop]: 3230 mSDtfsCounter, 3428 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3428 SdHoareTripleChecker+Valid, 3379 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 04:13:53,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3428 Valid, 3379 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 04:13:53,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17655 states. [2023-11-19 04:13:54,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17655 to 17555. [2023-11-19 04:13:54,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17555 states, 14987 states have (on average 1.4694735437379063) internal successors, (22023), 15054 states have internal predecessors, (22023), 1734 states have call successors, (1734), 833 states have call predecessors, (1734), 832 states have return successors, (1732), 1668 states have call predecessors, (1732), 1732 states have call successors, (1732) [2023-11-19 04:13:54,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17555 states to 17555 states and 25489 transitions. [2023-11-19 04:13:54,493 INFO L78 Accepts]: Start accepts. Automaton has 17555 states and 25489 transitions. Word has length 129 [2023-11-19 04:13:54,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:13:54,493 INFO L495 AbstractCegarLoop]: Abstraction has 17555 states and 25489 transitions. [2023-11-19 04:13:54,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 04:13:54,494 INFO L276 IsEmpty]: Start isEmpty. Operand 17555 states and 25489 transitions. [2023-11-19 04:13:54,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-11-19 04:13:54,556 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:13:54,556 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:13:54,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 04:13:54,557 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:13:54,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:13:54,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1189269924, now seen corresponding path program 1 times [2023-11-19 04:13:54,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:13:54,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944017048] [2023-11-19 04:13:54,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:54,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:13:54,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:13:54,967 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-19 04:13:54,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:13:54,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944017048] [2023-11-19 04:13:54,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944017048] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:13:54,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291509994] [2023-11-19 04:13:54,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:54,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:13:54,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:13:54,970 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:13:54,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 04:13:55,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:13:55,179 INFO L262 TraceCheckSpWp]: Trace formula consists of 812 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:13:55,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:13:55,240 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 04:13:55,240 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:13:55,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291509994] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:13:55,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:13:55,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-19 04:13:55,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324912802] [2023-11-19 04:13:55,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:13:55,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:13:55,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:13:55,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:13:55,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:13:55,243 INFO L87 Difference]: Start difference. First operand 17555 states and 25489 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-19 04:13:56,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:13:56,467 INFO L93 Difference]: Finished difference Result 25771 states and 37527 transitions. [2023-11-19 04:13:56,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:13:56,468 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 150 [2023-11-19 04:13:56,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:13:56,537 INFO L225 Difference]: With dead ends: 25771 [2023-11-19 04:13:56,537 INFO L226 Difference]: Without dead ends: 17623 [2023-11-19 04:13:56,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:13:56,570 INFO L413 NwaCegarLoop]: 3346 mSDtfsCounter, 146 mSDsluCounter, 3207 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 6553 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 04:13:56,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 6553 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 04:13:56,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17623 states. [2023-11-19 04:13:57,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17623 to 17491. [2023-11-19 04:13:57,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17491 states, 14923 states have (on average 1.4543322388259734) internal successors, (21703), 14990 states have internal predecessors, (21703), 1734 states have call successors, (1734), 833 states have call predecessors, (1734), 832 states have return successors, (1732), 1668 states have call predecessors, (1732), 1732 states have call successors, (1732) [2023-11-19 04:13:57,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17491 states to 17491 states and 25169 transitions. [2023-11-19 04:13:57,507 INFO L78 Accepts]: Start accepts. Automaton has 17491 states and 25169 transitions. Word has length 150 [2023-11-19 04:13:57,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:13:57,508 INFO L495 AbstractCegarLoop]: Abstraction has 17491 states and 25169 transitions. [2023-11-19 04:13:57,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-19 04:13:57,508 INFO L276 IsEmpty]: Start isEmpty. Operand 17491 states and 25169 transitions. [2023-11-19 04:13:57,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-11-19 04:13:57,569 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:13:57,570 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:13:57,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 04:13:57,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-19 04:13:57,791 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:13:57,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:13:57,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1453526084, now seen corresponding path program 1 times [2023-11-19 04:13:57,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:13:57,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625279568] [2023-11-19 04:13:57,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:57,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:13:57,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:13:58,178 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 10 proven. 43 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-19 04:13:58,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:13:58,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625279568] [2023-11-19 04:13:58,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625279568] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:13:58,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978693797] [2023-11-19 04:13:58,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:58,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:13:58,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:13:58,181 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:13:58,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 04:13:58,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:13:58,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 818 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:13:58,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:13:58,433 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-19 04:13:58,434 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:13:58,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978693797] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:13:58,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:13:58,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-19 04:13:58,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984229340] [2023-11-19 04:13:58,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:13:58,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:13:58,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:13:58,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:13:58,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:13:58,437 INFO L87 Difference]: Start difference. First operand 17491 states and 25169 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 04:13:59,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:13:59,596 INFO L93 Difference]: Finished difference Result 25675 states and 37047 transitions. [2023-11-19 04:13:59,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:13:59,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 150 [2023-11-19 04:13:59,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:13:59,656 INFO L225 Difference]: With dead ends: 25675 [2023-11-19 04:13:59,657 INFO L226 Difference]: Without dead ends: 17559 [2023-11-19 04:13:59,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:13:59,683 INFO L413 NwaCegarLoop]: 3341 mSDtfsCounter, 162 mSDsluCounter, 3206 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 6547 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 04:13:59,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 6547 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 04:13:59,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17559 states. [2023-11-19 04:14:00,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17559 to 17427. [2023-11-19 04:14:00,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17427 states, 14859 states have (on average 1.4390605020526281) internal successors, (21383), 14926 states have internal predecessors, (21383), 1734 states have call successors, (1734), 833 states have call predecessors, (1734), 832 states have return successors, (1732), 1668 states have call predecessors, (1732), 1732 states have call successors, (1732) [2023-11-19 04:14:00,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17427 states to 17427 states and 24849 transitions. [2023-11-19 04:14:00,409 INFO L78 Accepts]: Start accepts. Automaton has 17427 states and 24849 transitions. Word has length 150 [2023-11-19 04:14:00,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:14:00,409 INFO L495 AbstractCegarLoop]: Abstraction has 17427 states and 24849 transitions. [2023-11-19 04:14:00,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 04:14:00,410 INFO L276 IsEmpty]: Start isEmpty. Operand 17427 states and 24849 transitions. [2023-11-19 04:14:00,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-11-19 04:14:00,470 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:14:00,471 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:14:00,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 04:14:00,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:14:00,692 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:14:00,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:14:00,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1716181243, now seen corresponding path program 1 times [2023-11-19 04:14:00,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:14:00,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954426963] [2023-11-19 04:14:00,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:00,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:14:00,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:14:01,041 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-11-19 04:14:01,041 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:14:01,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954426963] [2023-11-19 04:14:01,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954426963] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:14:01,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753342083] [2023-11-19 04:14:01,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:01,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:14:01,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:14:01,043 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:14:01,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 04:14:01,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:14:01,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:14:01,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:14:01,306 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-19 04:14:01,306 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:14:01,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753342083] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:14:01,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:14:01,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-19 04:14:01,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865113524] [2023-11-19 04:14:01,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:14:01,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:14:01,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:14:01,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:14:01,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:14:01,312 INFO L87 Difference]: Start difference. First operand 17427 states and 24849 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 04:14:02,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:14:02,293 INFO L93 Difference]: Finished difference Result 29217 states and 40590 transitions. [2023-11-19 04:14:02,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:14:02,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 150 [2023-11-19 04:14:02,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:14:02,376 INFO L225 Difference]: With dead ends: 29217 [2023-11-19 04:14:02,376 INFO L226 Difference]: Without dead ends: 21197 [2023-11-19 04:14:02,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:14:02,400 INFO L413 NwaCegarLoop]: 3234 mSDtfsCounter, 3427 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3427 SdHoareTripleChecker+Valid, 3273 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:14:02,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3427 Valid, 3273 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:14:02,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21197 states. [2023-11-19 04:14:03,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21197 to 21197. [2023-11-19 04:14:03,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21197 states, 18249 states have (on average 1.392569455860595) internal successors, (25413), 18316 states have internal predecessors, (25413), 1860 states have call successors, (1860), 1087 states have call predecessors, (1860), 1086 states have return successors, (1858), 1794 states have call predecessors, (1858), 1858 states have call successors, (1858) [2023-11-19 04:14:03,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21197 states to 21197 states and 29131 transitions. [2023-11-19 04:14:03,514 INFO L78 Accepts]: Start accepts. Automaton has 21197 states and 29131 transitions. Word has length 150 [2023-11-19 04:14:03,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:14:03,514 INFO L495 AbstractCegarLoop]: Abstraction has 21197 states and 29131 transitions. [2023-11-19 04:14:03,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 04:14:03,515 INFO L276 IsEmpty]: Start isEmpty. Operand 21197 states and 29131 transitions. [2023-11-19 04:14:03,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-11-19 04:14:03,557 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:14:03,557 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:14:03,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 04:14:03,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c93f771-d6a8-4000-8048-07534a12a2bb/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:14:03,772 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:14:03,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:14:03,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1284673839, now seen corresponding path program 1 times [2023-11-19 04:14:03,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:14:03,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14181352] [2023-11-19 04:14:03,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:03,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:14:03,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat