./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label41+token_ring.10.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label41+token_ring.10.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh --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 f17b4934c356e2ce9ba49d61eb1cce33fd0fc691ea6c2b102ce8a7ddd1bdeb11 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 13:22:45,021 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 13:22:45,083 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 13:22:45,088 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 13:22:45,089 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 13:22:45,109 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 13:22:45,109 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 13:22:45,109 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 13:22:45,110 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 13:22:45,111 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 13:22:45,111 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 13:22:45,112 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 13:22:45,112 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 13:22:45,113 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 13:22:45,113 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 13:22:45,114 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 13:22:45,114 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 13:22:45,115 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 13:22:45,115 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 13:22:45,116 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 13:22:45,116 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 13:22:45,117 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 13:22:45,117 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 13:22:45,118 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 13:22:45,118 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 13:22:45,119 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 13:22:45,119 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 13:22:45,119 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 13:22:45,120 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 13:22:45,120 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 13:22:45,120 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 13:22:45,121 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 13:22:45,121 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 13:22:45,121 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 13:22:45,121 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 13:22:45,122 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 13:22:45,122 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 13:22:45,122 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:22:45,122 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 13:22:45,122 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 13:22:45,122 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 13:22:45,123 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 13:22:45,123 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 13:22:45,123 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 13:22:45,123 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 13:22:45,123 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 13:22:45,124 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 13:22:45,124 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_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f17b4934c356e2ce9ba49d61eb1cce33fd0fc691ea6c2b102ce8a7ddd1bdeb11 [2023-12-02 13:22:45,320 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 13:22:45,339 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 13:22:45,342 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 13:22:45,343 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 13:22:45,343 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 13:22:45,344 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/combinations/Problem05_label41+token_ring.10.cil-2.c [2023-12-02 13:22:48,107 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 13:22:48,602 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 13:22:48,603 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/sv-benchmarks/c/combinations/Problem05_label41+token_ring.10.cil-2.c [2023-12-02 13:22:48,645 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/data/3ebbfd604/49862fc23c984570a2de39b848dc5fe1/FLAGac0dee9ac [2023-12-02 13:22:48,658 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/data/3ebbfd604/49862fc23c984570a2de39b848dc5fe1 [2023-12-02 13:22:48,660 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 13:22:48,661 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 13:22:48,662 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 13:22:48,662 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 13:22:48,667 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 13:22:48,667 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:22:48" (1/1) ... [2023-12-02 13:22:48,668 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d186e38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:22:48, skipping insertion in model container [2023-12-02 13:22:48,669 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:22:48" (1/1) ... [2023-12-02 13:22:48,926 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 13:22:50,728 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_b6c933e6-f3bb-441f-b226-e18127476ccf/sv-benchmarks/c/combinations/Problem05_label41+token_ring.10.cil-2.c[376251,376264] [2023-12-02 13:22:50,759 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_b6c933e6-f3bb-441f-b226-e18127476ccf/sv-benchmarks/c/combinations/Problem05_label41+token_ring.10.cil-2.c[383339,383352] [2023-12-02 13:22:51,007 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:22:51,018 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 13:22:52,019 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_b6c933e6-f3bb-441f-b226-e18127476ccf/sv-benchmarks/c/combinations/Problem05_label41+token_ring.10.cil-2.c[376251,376264] [2023-12-02 13:22:52,029 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_b6c933e6-f3bb-441f-b226-e18127476ccf/sv-benchmarks/c/combinations/Problem05_label41+token_ring.10.cil-2.c[383339,383352] [2023-12-02 13:22:52,051 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:22:52,107 INFO L206 MainTranslator]: Completed translation [2023-12-02 13:22:52,107 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:22:52 WrapperNode [2023-12-02 13:22:52,107 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 13:22:52,108 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 13:22:52,108 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 13:22:52,109 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 13:22:52,115 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:22:52" (1/1) ... [2023-12-02 13:22:52,179 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:22:52" (1/1) ... [2023-12-02 13:22:52,515 INFO L138 Inliner]: procedures = 64, calls = 71, calls flagged for inlining = 42, calls inlined = 42, statements flattened = 13108 [2023-12-02 13:22:52,515 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 13:22:52,516 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 13:22:52,516 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 13:22:52,516 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 13:22:52,525 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:22:52" (1/1) ... [2023-12-02 13:22:52,526 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:22:52" (1/1) ... [2023-12-02 13:22:52,563 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:22:52" (1/1) ... [2023-12-02 13:22:52,563 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:22:52" (1/1) ... [2023-12-02 13:22:52,700 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:22:52" (1/1) ... [2023-12-02 13:22:52,764 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:22:52" (1/1) ... [2023-12-02 13:22:52,785 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:22:52" (1/1) ... [2023-12-02 13:22:52,806 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:22:52" (1/1) ... [2023-12-02 13:22:52,856 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 13:22:52,857 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 13:22:52,858 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 13:22:52,858 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 13:22:52,859 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:22:52" (1/1) ... [2023-12-02 13:22:52,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:22:52,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:22:52,886 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 13:22:52,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 13:22:52,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 13:22:52,924 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-12-02 13:22:52,924 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-12-02 13:22:52,924 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-12-02 13:22:52,924 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-12-02 13:22:52,925 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-12-02 13:22:52,925 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-12-02 13:22:52,925 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-12-02 13:22:52,925 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-12-02 13:22:52,926 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-12-02 13:22:52,926 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-12-02 13:22:52,926 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-12-02 13:22:52,926 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-12-02 13:22:52,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 13:22:52,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 13:22:52,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 13:22:53,050 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 13:22:53,052 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 13:23:00,821 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 13:23:03,062 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 13:23:03,062 INFO L309 CfgBuilder]: Removed 14 assume(true) statements. [2023-12-02 13:23:03,064 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:23:03 BoogieIcfgContainer [2023-12-02 13:23:03,065 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 13:23:03,067 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 13:23:03,068 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 13:23:03,071 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 13:23:03,071 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:22:48" (1/3) ... [2023-12-02 13:23:03,072 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@744da34c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:23:03, skipping insertion in model container [2023-12-02 13:23:03,072 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:22:52" (2/3) ... [2023-12-02 13:23:03,072 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@744da34c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:23:03, skipping insertion in model container [2023-12-02 13:23:03,073 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:23:03" (3/3) ... [2023-12-02 13:23:03,074 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label41+token_ring.10.cil-2.c [2023-12-02 13:23:03,093 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 13:23:03,094 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-02 13:23:03,183 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 13:23:03,190 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;@560c9b9c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 13:23:03,190 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-02 13:23:03,203 INFO L276 IsEmpty]: Start isEmpty. Operand has 1820 states, 1787 states have (on average 1.9541130386121992) internal successors, (3492), 1790 states have internal predecessors, (3492), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-12-02 13:23:03,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-02 13:23:03,216 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:23:03,216 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:23:03,217 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:23:03,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:23:03,222 INFO L85 PathProgramCache]: Analyzing trace with hash 548283999, now seen corresponding path program 1 times [2023-12-02 13:23:03,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:23:03,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945872552] [2023-12-02 13:23:03,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:23:03,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:23:03,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:23:03,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:23:03,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:23:03,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945872552] [2023-12-02 13:23:03,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945872552] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:23:03,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:23:03,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 13:23:03,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101084735] [2023-12-02 13:23:03,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:23:03,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:23:03,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:23:03,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:23:03,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:23:03,729 INFO L87 Difference]: Start difference. First operand has 1820 states, 1787 states have (on average 1.9541130386121992) internal successors, (3492), 1790 states have internal predecessors, (3492), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 13:23:04,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:23:04,687 INFO L93 Difference]: Finished difference Result 3800 states and 7348 transitions. [2023-12-02 13:23:04,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:23:04,690 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 61 [2023-12-02 13:23:04,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:23:04,715 INFO L225 Difference]: With dead ends: 3800 [2023-12-02 13:23:04,716 INFO L226 Difference]: Without dead ends: 1979 [2023-12-02 13:23:04,723 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 [2023-12-02 13:23:04,726 INFO L413 NwaCegarLoop]: 3473 mSDtfsCounter, 3735 mSDsluCounter, 3383 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3735 SdHoareTripleChecker+Valid, 6856 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 13:23:04,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3735 Valid, 6856 Invalid, 708 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 13:23:04,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2023-12-02 13:23:04,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 1978. [2023-12-02 13:23:04,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1920 states have (on average 1.915625) internal successors, (3678), 1923 states have internal predecessors, (3678), 44 states have call successors, (44), 12 states have call predecessors, (44), 12 states have return successors, (44), 43 states have call predecessors, (44), 44 states have call successors, (44) [2023-12-02 13:23:04,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 3766 transitions. [2023-12-02 13:23:04,863 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 3766 transitions. Word has length 61 [2023-12-02 13:23:04,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:23:04,864 INFO L495 AbstractCegarLoop]: Abstraction has 1978 states and 3766 transitions. [2023-12-02 13:23:04,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 13:23:04,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 3766 transitions. [2023-12-02 13:23:04,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-02 13:23:04,874 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:23:04,875 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:23:04,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 13:23:04,875 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:23:04,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:23:04,876 INFO L85 PathProgramCache]: Analyzing trace with hash 410780466, now seen corresponding path program 1 times [2023-12-02 13:23:04,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:23:04,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679497997] [2023-12-02 13:23:04,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:23:04,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:23:04,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:23:05,147 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 13:23:05,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:23:05,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679497997] [2023-12-02 13:23:05,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679497997] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:23:05,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900041757] [2023-12-02 13:23:05,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:23:05,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:23:05,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:23:05,150 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:23:05,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 13:23:05,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:23:05,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 897 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:23:05,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:23:05,522 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 13:23:05,522 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:23:05,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900041757] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:23:05,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:23:05,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 13:23:05,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347147927] [2023-12-02 13:23:05,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:23:05,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:23:05,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:23:05,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:23:05,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:23:05,526 INFO L87 Difference]: Start difference. First operand 1978 states and 3766 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 13:23:06,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:23:06,017 INFO L93 Difference]: Finished difference Result 2635 states and 4761 transitions. [2023-12-02 13:23:06,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:23:06,018 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2023-12-02 13:23:06,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:23:06,032 INFO L225 Difference]: With dead ends: 2635 [2023-12-02 13:23:06,033 INFO L226 Difference]: Without dead ends: 2303 [2023-12-02 13:23:06,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:23:06,036 INFO L413 NwaCegarLoop]: 3319 mSDtfsCounter, 3482 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3482 SdHoareTripleChecker+Valid, 3525 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:23:06,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3482 Valid, 3525 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:23:06,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2303 states. [2023-12-02 13:23:06,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2303 to 2299. [2023-12-02 13:23:06,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2299 states, 2191 states have (on average 1.8589685075308078) internal successors, (4073), 2195 states have internal predecessors, (4073), 82 states have call successors, (82), 24 states have call predecessors, (82), 24 states have return successors, (82), 80 states have call predecessors, (82), 82 states have call successors, (82) [2023-12-02 13:23:06,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 4237 transitions. [2023-12-02 13:23:06,108 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 4237 transitions. Word has length 123 [2023-12-02 13:23:06,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:23:06,109 INFO L495 AbstractCegarLoop]: Abstraction has 2299 states and 4237 transitions. [2023-12-02 13:23:06,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 13:23:06,109 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 4237 transitions. [2023-12-02 13:23:06,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-02 13:23:06,113 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:23:06,113 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:23:06,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 13:23:06,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:23:06,316 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:23:06,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:23:06,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1859910866, now seen corresponding path program 1 times [2023-12-02 13:23:06,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:23:06,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239499727] [2023-12-02 13:23:06,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:23:06,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:23:06,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:23:06,518 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 13:23:06,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:23:06,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239499727] [2023-12-02 13:23:06,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239499727] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:23:06,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593603494] [2023-12-02 13:23:06,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:23:06,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:23:06,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:23:06,524 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:23:06,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 13:23:06,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:23:06,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:23:06,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:23:06,796 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-02 13:23:06,796 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:23:06,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593603494] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:23:06,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:23:06,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 13:23:06,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528765759] [2023-12-02 13:23:06,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:23:06,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:23:06,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:23:06,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:23:06,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:23:06,800 INFO L87 Difference]: Start difference. First operand 2299 states and 4237 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 13:23:07,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:23:07,315 INFO L93 Difference]: Finished difference Result 3592 states and 6188 transitions. [2023-12-02 13:23:07,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:23:07,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2023-12-02 13:23:07,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:23:07,337 INFO L225 Difference]: With dead ends: 3592 [2023-12-02 13:23:07,338 INFO L226 Difference]: Without dead ends: 2939 [2023-12-02 13:23:07,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:23:07,343 INFO L413 NwaCegarLoop]: 3299 mSDtfsCounter, 3500 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3500 SdHoareTripleChecker+Valid, 3505 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:23:07,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3500 Valid, 3505 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:23:07,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2939 states. [2023-12-02 13:23:07,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2939 to 2933. [2023-12-02 13:23:07,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2933 states, 2727 states have (on average 1.778877887788779) internal successors, (4851), 2733 states have internal predecessors, (4851), 156 states have call successors, (156), 48 states have call predecessors, (156), 48 states have return successors, (156), 152 states have call predecessors, (156), 156 states have call successors, (156) [2023-12-02 13:23:07,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2933 states to 2933 states and 5163 transitions. [2023-12-02 13:23:07,470 INFO L78 Accepts]: Start accepts. Automaton has 2933 states and 5163 transitions. Word has length 123 [2023-12-02 13:23:07,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:23:07,471 INFO L495 AbstractCegarLoop]: Abstraction has 2933 states and 5163 transitions. [2023-12-02 13:23:07,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 13:23:07,471 INFO L276 IsEmpty]: Start isEmpty. Operand 2933 states and 5163 transitions. [2023-12-02 13:23:07,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-02 13:23:07,479 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:23:07,480 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:23:07,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 13:23:07,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:23:07,685 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:23:07,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:23:07,685 INFO L85 PathProgramCache]: Analyzing trace with hash -821244302, now seen corresponding path program 1 times [2023-12-02 13:23:07,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:23:07,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355201456] [2023-12-02 13:23:07,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:23:07,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:23:07,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:23:07,847 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 13:23:07,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:23:07,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355201456] [2023-12-02 13:23:07,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355201456] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:23:07,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316724856] [2023-12-02 13:23:07,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:23:07,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:23:07,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:23:07,851 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:23:07,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 13:23:08,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:23:08,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:23:08,080 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:23:08,118 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-02 13:23:08,118 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:23:08,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316724856] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:23:08,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:23:08,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 13:23:08,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425651674] [2023-12-02 13:23:08,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:23:08,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:23:08,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:23:08,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:23:08,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:23:08,121 INFO L87 Difference]: Start difference. First operand 2933 states and 5163 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 13:23:08,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:23:08,619 INFO L93 Difference]: Finished difference Result 5482 states and 8992 transitions. [2023-12-02 13:23:08,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:23:08,620 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2023-12-02 13:23:08,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:23:08,641 INFO L225 Difference]: With dead ends: 5482 [2023-12-02 13:23:08,641 INFO L226 Difference]: Without dead ends: 4195 [2023-12-02 13:23:08,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:23:08,647 INFO L413 NwaCegarLoop]: 3288 mSDtfsCounter, 3494 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3494 SdHoareTripleChecker+Valid, 3494 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:23:08,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3494 Valid, 3494 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:23:08,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4195 states. [2023-12-02 13:23:08,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4195 to 4185. [2023-12-02 13:23:08,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4185 states, 3787 states have (on average 1.6855030367045154) internal successors, (6383), 3797 states have internal predecessors, (6383), 300 states have call successors, (300), 96 states have call predecessors, (300), 96 states have return successors, (300), 292 states have call predecessors, (300), 300 states have call successors, (300) [2023-12-02 13:23:08,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4185 states to 4185 states and 6983 transitions. [2023-12-02 13:23:08,784 INFO L78 Accepts]: Start accepts. Automaton has 4185 states and 6983 transitions. Word has length 123 [2023-12-02 13:23:08,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:23:08,785 INFO L495 AbstractCegarLoop]: Abstraction has 4185 states and 6983 transitions. [2023-12-02 13:23:08,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 13:23:08,785 INFO L276 IsEmpty]: Start isEmpty. Operand 4185 states and 6983 transitions. [2023-12-02 13:23:08,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-02 13:23:08,791 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:23:08,791 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:23:08,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 13:23:08,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:23:08,992 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:23:08,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:23:08,992 INFO L85 PathProgramCache]: Analyzing trace with hash 304306194, now seen corresponding path program 1 times [2023-12-02 13:23:08,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:23:08,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053717436] [2023-12-02 13:23:08,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:23:08,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:23:09,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:23:09,150 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 13:23:09,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:23:09,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053717436] [2023-12-02 13:23:09,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053717436] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:23:09,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060856145] [2023-12-02 13:23:09,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:23:09,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:23:09,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:23:09,155 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:23:09,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 13:23:09,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:23:09,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:23:09,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:23:09,416 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-02 13:23:09,416 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:23:09,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060856145] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:23:09,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:23:09,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 13:23:09,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071490912] [2023-12-02 13:23:09,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:23:09,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:23:09,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:23:09,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:23:09,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:23:09,419 INFO L87 Difference]: Start difference. First operand 4185 states and 6983 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 13:23:10,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:23:10,034 INFO L93 Difference]: Finished difference Result 9214 states and 14500 transitions. [2023-12-02 13:23:10,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:23:10,035 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2023-12-02 13:23:10,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:23:10,066 INFO L225 Difference]: With dead ends: 9214 [2023-12-02 13:23:10,067 INFO L226 Difference]: Without dead ends: 6675 [2023-12-02 13:23:10,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:23:10,077 INFO L413 NwaCegarLoop]: 3313 mSDtfsCounter, 3503 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3503 SdHoareTripleChecker+Valid, 3519 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:23:10,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3503 Valid, 3519 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:23:10,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6675 states. [2023-12-02 13:23:10,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6675 to 6657. [2023-12-02 13:23:10,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6657 states, 5883 states have (on average 1.5976542580316164) internal successors, (9399), 5901 states have internal predecessors, (9399), 580 states have call successors, (580), 192 states have call predecessors, (580), 192 states have return successors, (580), 564 states have call predecessors, (580), 580 states have call successors, (580) [2023-12-02 13:23:10,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6657 states to 6657 states and 10559 transitions. [2023-12-02 13:23:10,273 INFO L78 Accepts]: Start accepts. Automaton has 6657 states and 10559 transitions. Word has length 123 [2023-12-02 13:23:10,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:23:10,273 INFO L495 AbstractCegarLoop]: Abstraction has 6657 states and 10559 transitions. [2023-12-02 13:23:10,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 13:23:10,273 INFO L276 IsEmpty]: Start isEmpty. Operand 6657 states and 10559 transitions. [2023-12-02 13:23:10,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-02 13:23:10,282 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:23:10,282 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:23:10,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 13:23:10,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:23:10,483 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:23:10,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:23:10,484 INFO L85 PathProgramCache]: Analyzing trace with hash -482499982, now seen corresponding path program 1 times [2023-12-02 13:23:10,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:23:10,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334992471] [2023-12-02 13:23:10,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:23:10,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:23:10,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:23:10,636 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 13:23:10,636 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:23:10,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334992471] [2023-12-02 13:23:10,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334992471] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:23:10,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63084990] [2023-12-02 13:23:10,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:23:10,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:23:10,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:23:10,638 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:23:10,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 13:23:10,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:23:10,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:23:10,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:23:10,912 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 13:23:10,912 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:23:10,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63084990] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:23:10,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:23:10,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 13:23:10,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332817111] [2023-12-02 13:23:10,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:23:10,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:23:10,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:23:10,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:23:10,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:23:10,915 INFO L87 Difference]: Start difference. First operand 6657 states and 10559 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 13:23:11,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:23:11,593 INFO L93 Difference]: Finished difference Result 16582 states and 25316 transitions. [2023-12-02 13:23:11,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:23:11,594 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2023-12-02 13:23:11,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:23:11,664 INFO L225 Difference]: With dead ends: 16582 [2023-12-02 13:23:11,664 INFO L226 Difference]: Without dead ends: 11571 [2023-12-02 13:23:11,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:23:11,687 INFO L413 NwaCegarLoop]: 3270 mSDtfsCounter, 3488 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3488 SdHoareTripleChecker+Valid, 3476 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:23:11,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3488 Valid, 3476 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:23:11,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11571 states. [2023-12-02 13:23:12,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11571 to 11537. [2023-12-02 13:23:12,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11537 states, 10027 states have (on average 1.5293706991123965) internal successors, (15335), 10061 states have internal predecessors, (15335), 1124 states have call successors, (1124), 384 states have call predecessors, (1124), 384 states have return successors, (1124), 1092 states have call predecessors, (1124), 1124 states have call successors, (1124) [2023-12-02 13:23:12,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11537 states to 11537 states and 17583 transitions. [2023-12-02 13:23:12,275 INFO L78 Accepts]: Start accepts. Automaton has 11537 states and 17583 transitions. Word has length 123 [2023-12-02 13:23:12,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:23:12,275 INFO L495 AbstractCegarLoop]: Abstraction has 11537 states and 17583 transitions. [2023-12-02 13:23:12,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 13:23:12,276 INFO L276 IsEmpty]: Start isEmpty. Operand 11537 states and 17583 transitions. [2023-12-02 13:23:12,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-02 13:23:12,301 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:23:12,301 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:23:12,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 13:23:12,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:23:12,502 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:23:12,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:23:12,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1243356142, now seen corresponding path program 1 times [2023-12-02 13:23:12,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:23:12,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703991666] [2023-12-02 13:23:12,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:23:12,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:23:12,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:23:12,991 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 13:23:12,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:23:12,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703991666] [2023-12-02 13:23:12,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703991666] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:23:12,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:23:12,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 13:23:12,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041242748] [2023-12-02 13:23:12,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:23:12,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:23:12,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:23:12,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:23:12,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:23:12,995 INFO L87 Difference]: Start difference. First operand 11537 states and 17583 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 13:23:14,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:23:14,696 INFO L93 Difference]: Finished difference Result 26773 states and 39857 transitions. [2023-12-02 13:23:14,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 13:23:14,697 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 123 [2023-12-02 13:23:14,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:23:14,761 INFO L225 Difference]: With dead ends: 26773 [2023-12-02 13:23:14,761 INFO L226 Difference]: Without dead ends: 16883 [2023-12-02 13:23:14,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-12-02 13:23:14,795 INFO L413 NwaCegarLoop]: 3274 mSDtfsCounter, 3956 mSDsluCounter, 9688 mSDsCounter, 0 mSdLazyCounter, 1172 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3962 SdHoareTripleChecker+Valid, 12962 SdHoareTripleChecker+Invalid, 1282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:23:14,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3962 Valid, 12962 Invalid, 1282 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [110 Valid, 1172 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 13:23:14,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16883 states. [2023-12-02 13:23:15,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16883 to 16353. [2023-12-02 13:23:15,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16353 states, 14107 states have (on average 1.4987594811086695) internal successors, (21143), 14157 states have internal predecessors, (21143), 1668 states have call successors, (1668), 576 states have call predecessors, (1668), 576 states have return successors, (1668), 1620 states have call predecessors, (1668), 1668 states have call successors, (1668) [2023-12-02 13:23:15,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16353 states to 16353 states and 24479 transitions. [2023-12-02 13:23:15,583 INFO L78 Accepts]: Start accepts. Automaton has 16353 states and 24479 transitions. Word has length 123 [2023-12-02 13:23:15,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:23:15,584 INFO L495 AbstractCegarLoop]: Abstraction has 16353 states and 24479 transitions. [2023-12-02 13:23:15,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 13:23:15,585 INFO L276 IsEmpty]: Start isEmpty. Operand 16353 states and 24479 transitions. [2023-12-02 13:23:15,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-12-02 13:23:15,613 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:23:15,613 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:23:15,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 13:23:15,613 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:23:15,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:23:15,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1474945001, now seen corresponding path program 1 times [2023-12-02 13:23:15,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:23:15,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354550657] [2023-12-02 13:23:15,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:23:15,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:23:15,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:23:16,125 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 13:23:16,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:23:16,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354550657] [2023-12-02 13:23:16,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354550657] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:23:16,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:23:16,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 13:23:16,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824569672] [2023-12-02 13:23:16,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:23:16,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:23:16,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:23:16,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:23:16,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:23:16,128 INFO L87 Difference]: Start difference. First operand 16353 states and 24479 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 13:23:17,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:23:17,865 INFO L93 Difference]: Finished difference Result 46389 states and 68305 transitions. [2023-12-02 13:23:17,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 13:23:17,865 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 125 [2023-12-02 13:23:17,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:23:17,949 INFO L225 Difference]: With dead ends: 46389 [2023-12-02 13:23:17,949 INFO L226 Difference]: Without dead ends: 31683 [2023-12-02 13:23:17,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-12-02 13:23:17,985 INFO L413 NwaCegarLoop]: 3255 mSDtfsCounter, 3975 mSDsluCounter, 6475 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3994 SdHoareTripleChecker+Valid, 9730 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 13:23:17,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3994 Valid, 9730 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 870 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 13:23:18,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31683 states. [2023-12-02 13:23:19,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31683 to 30481. [2023-12-02 13:23:19,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30481 states, 26091 states have (on average 1.4622283546050363) internal successors, (38151), 26189 states have internal predecessors, (38151), 3236 states have call successors, (3236), 1152 states have call predecessors, (3236), 1152 states have return successors, (3236), 3140 states have call predecessors, (3236), 3236 states have call successors, (3236) [2023-12-02 13:23:19,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30481 states to 30481 states and 44623 transitions. [2023-12-02 13:23:19,205 INFO L78 Accepts]: Start accepts. Automaton has 30481 states and 44623 transitions. Word has length 125 [2023-12-02 13:23:19,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:23:19,206 INFO L495 AbstractCegarLoop]: Abstraction has 30481 states and 44623 transitions. [2023-12-02 13:23:19,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 13:23:19,206 INFO L276 IsEmpty]: Start isEmpty. Operand 30481 states and 44623 transitions. [2023-12-02 13:23:19,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-12-02 13:23:19,241 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:23:19,241 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:23:19,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 13:23:19,242 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:23:19,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:23:19,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1160280622, now seen corresponding path program 1 times [2023-12-02 13:23:19,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:23:19,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689926435] [2023-12-02 13:23:19,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:23:19,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:23:19,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:23:19,590 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 13:23:19,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:23:19,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689926435] [2023-12-02 13:23:19,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689926435] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:23:19,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:23:19,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 13:23:19,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648998230] [2023-12-02 13:23:19,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:23:19,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:23:19,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:23:19,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:23:19,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:23:19,593 INFO L87 Difference]: Start difference. First operand 30481 states and 44623 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 13:23:22,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:23:22,612 INFO L93 Difference]: Finished difference Result 94421 states and 137073 transitions. [2023-12-02 13:23:22,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 13:23:22,612 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 127 [2023-12-02 13:23:22,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:23:22,785 INFO L225 Difference]: With dead ends: 94421 [2023-12-02 13:23:22,785 INFO L226 Difference]: Without dead ends: 65587 [2023-12-02 13:23:22,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-12-02 13:23:22,823 INFO L413 NwaCegarLoop]: 3292 mSDtfsCounter, 4002 mSDsluCounter, 6527 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4021 SdHoareTripleChecker+Valid, 9819 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 13:23:22,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4021 Valid, 9819 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 13:23:22,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65587 states. [2023-12-02 13:23:24,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65587 to 58161. [2023-12-02 13:23:24,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58161 states, 49579 states have (on average 1.4381693862320741) internal successors, (71303), 49773 states have internal predecessors, (71303), 6276 states have call successors, (6276), 2304 states have call predecessors, (6276), 2304 states have return successors, (6276), 6084 states have call predecessors, (6276), 6276 states have call successors, (6276) [2023-12-02 13:23:25,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58161 states to 58161 states and 83855 transitions. [2023-12-02 13:23:25,006 INFO L78 Accepts]: Start accepts. Automaton has 58161 states and 83855 transitions. Word has length 127 [2023-12-02 13:23:25,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:23:25,006 INFO L495 AbstractCegarLoop]: Abstraction has 58161 states and 83855 transitions. [2023-12-02 13:23:25,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 13:23:25,006 INFO L276 IsEmpty]: Start isEmpty. Operand 58161 states and 83855 transitions. [2023-12-02 13:23:25,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-12-02 13:23:25,073 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:23:25,073 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 13:23:25,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 13:23:25,073 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:23:25,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:23:25,074 INFO L85 PathProgramCache]: Analyzing trace with hash -543113334, now seen corresponding path program 1 times [2023-12-02 13:23:25,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:23:25,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777605709] [2023-12-02 13:23:25,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:23:25,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:23:25,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:23:25,374 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 35 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-02 13:23:25,374 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:23:25,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777605709] [2023-12-02 13:23:25,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777605709] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:23:25,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782602664] [2023-12-02 13:23:25,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:23:25,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:23:25,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:23:25,376 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:23:25,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 13:23:25,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:23:25,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 929 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:23:25,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:23:25,615 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 13:23:25,615 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:23:25,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782602664] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:23:25,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:23:25,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-02 13:23:25,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119338828] [2023-12-02 13:23:25,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:23:25,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:23:25,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:23:25,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:23:25,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:23:25,618 INFO L87 Difference]: Start difference. First operand 58161 states and 83855 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 13:23:28,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:23:28,877 INFO L93 Difference]: Finished difference Result 102579 states and 148816 transitions. [2023-12-02 13:23:28,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:23:28,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 152 [2023-12-02 13:23:28,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:23:29,197 INFO L225 Difference]: With dead ends: 102579 [2023-12-02 13:23:29,197 INFO L226 Difference]: Without dead ends: 73841 [2023-12-02 13:23:29,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:23:29,258 INFO L413 NwaCegarLoop]: 3394 mSDtfsCounter, 113 mSDsluCounter, 3281 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 6675 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:23:29,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 6675 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:23:29,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73841 states. [2023-12-02 13:23:31,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73841 to 69745. [2023-12-02 13:23:31,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69745 states, 60779 states have (on average 1.4616726171868573) internal successors, (88839), 60973 states have internal predecessors, (88839), 6468 states have call successors, (6468), 2496 states have call predecessors, (6468), 2496 states have return successors, (6468), 6276 states have call predecessors, (6468), 6468 states have call successors, (6468) [2023-12-02 13:23:31,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69745 states to 69745 states and 101775 transitions. [2023-12-02 13:23:31,991 INFO L78 Accepts]: Start accepts. Automaton has 69745 states and 101775 transitions. Word has length 152 [2023-12-02 13:23:31,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:23:31,992 INFO L495 AbstractCegarLoop]: Abstraction has 69745 states and 101775 transitions. [2023-12-02 13:23:31,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 13:23:31,992 INFO L276 IsEmpty]: Start isEmpty. Operand 69745 states and 101775 transitions. [2023-12-02 13:23:32,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2023-12-02 13:23:32,086 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:23:32,086 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, 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] [2023-12-02 13:23:32,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 13:23:32,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 13:23:32,287 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:23:32,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:23:32,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1045703077, now seen corresponding path program 1 times [2023-12-02 13:23:32,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:23:32,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923895820] [2023-12-02 13:23:32,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:23:32,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:23:32,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:23:32,641 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 10 proven. 69 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-12-02 13:23:32,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:23:32,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923895820] [2023-12-02 13:23:32,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923895820] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:23:32,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817014924] [2023-12-02 13:23:32,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:23:32,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:23:32,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:23:32,643 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:23:32,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 13:23:32,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:23:32,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 1156 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:23:32,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:23:33,040 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-12-02 13:23:33,040 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:23:33,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817014924] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:23:33,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:23:33,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2023-12-02 13:23:33,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215166443] [2023-12-02 13:23:33,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:23:33,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:23:33,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:23:33,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:23:33,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:23:33,043 INFO L87 Difference]: Start difference. First operand 69745 states and 101775 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 states have internal predecessors, (125), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 13:23:38,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:23:38,455 INFO L93 Difference]: Finished difference Result 204790 states and 300436 transitions. [2023-12-02 13:23:38,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:23:38,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 states have internal predecessors, (125), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 197 [2023-12-02 13:23:38,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:23:38,851 INFO L225 Difference]: With dead ends: 204790 [2023-12-02 13:23:38,851 INFO L226 Difference]: Without dead ends: 136691 [2023-12-02 13:23:38,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:23:38,943 INFO L413 NwaCegarLoop]: 3270 mSDtfsCounter, 3430 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3430 SdHoareTripleChecker+Valid, 3476 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 13:23:38,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3430 Valid, 3476 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 13:23:39,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136691 states. [2023-12-02 13:23:44,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136691 to 136113. [2023-12-02 13:23:44,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136113 states, 118571 states have (on average 1.4482377647148121) internal successors, (171719), 118957 states have internal predecessors, (171719), 12548 states have call successors, (12548), 4992 states have call predecessors, (12548), 4992 states have return successors, (12548), 12164 states have call predecessors, (12548), 12548 states have call successors, (12548) [2023-12-02 13:23:44,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136113 states to 136113 states and 196815 transitions. [2023-12-02 13:23:44,725 INFO L78 Accepts]: Start accepts. Automaton has 136113 states and 196815 transitions. Word has length 197 [2023-12-02 13:23:44,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:23:44,725 INFO L495 AbstractCegarLoop]: Abstraction has 136113 states and 196815 transitions. [2023-12-02 13:23:44,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 states have internal predecessors, (125), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 13:23:44,726 INFO L276 IsEmpty]: Start isEmpty. Operand 136113 states and 196815 transitions. [2023-12-02 13:23:44,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2023-12-02 13:23:44,903 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:23:44,903 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, 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] [2023-12-02 13:23:44,909 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 13:23:45,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:23:45,104 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:23:45,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:23:45,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1972863283, now seen corresponding path program 1 times [2023-12-02 13:23:45,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:23:45,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866630671] [2023-12-02 13:23:45,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:23:45,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:23:45,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:23:45,334 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 10 proven. 69 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-12-02 13:23:45,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:23:45,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866630671] [2023-12-02 13:23:45,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866630671] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:23:45,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824625682] [2023-12-02 13:23:45,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:23:45,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:23:45,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:23:45,336 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:23:45,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 13:23:45,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:23:45,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 1156 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:23:45,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:23:45,956 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-12-02 13:23:45,956 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:23:45,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824625682] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:23:45,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:23:45,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2023-12-02 13:23:45,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904963361] [2023-12-02 13:23:45,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:23:45,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:23:45,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:23:45,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:23:45,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:23:45,958 INFO L87 Difference]: Start difference. First operand 136113 states and 196815 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 2 states have internal predecessors, (133), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 13:23:54,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:23:54,958 INFO L93 Difference]: Finished difference Result 402742 states and 586836 transitions. [2023-12-02 13:23:54,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:23:54,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 2 states have internal predecessors, (133), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 197 [2023-12-02 13:23:54,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:23:55,699 INFO L225 Difference]: With dead ends: 402742 [2023-12-02 13:23:55,699 INFO L226 Difference]: Without dead ends: 268275 [2023-12-02 13:23:55,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:23:55,871 INFO L413 NwaCegarLoop]: 3270 mSDtfsCounter, 3430 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3430 SdHoareTripleChecker+Valid, 3476 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:23:55,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3430 Valid, 3476 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 13:23:56,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268275 states. [2023-12-02 13:24:05,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268275 to 267121. [2023-12-02 13:24:05,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267121 states, 232811 states have (on average 1.4380377215853202) internal successors, (334791), 233581 states have internal predecessors, (334791), 24324 states have call successors, (24324), 9984 states have call predecessors, (24324), 9984 states have return successors, (24324), 23556 states have call predecessors, (24324), 24324 states have call successors, (24324) [2023-12-02 13:24:07,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267121 states to 267121 states and 383439 transitions. [2023-12-02 13:24:07,181 INFO L78 Accepts]: Start accepts. Automaton has 267121 states and 383439 transitions. Word has length 197 [2023-12-02 13:24:07,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:24:07,181 INFO L495 AbstractCegarLoop]: Abstraction has 267121 states and 383439 transitions. [2023-12-02 13:24:07,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 2 states have internal predecessors, (133), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 13:24:07,182 INFO L276 IsEmpty]: Start isEmpty. Operand 267121 states and 383439 transitions. [2023-12-02 13:24:07,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2023-12-02 13:24:07,583 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:24:07,583 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, 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] [2023-12-02 13:24:07,589 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 13:24:07,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 13:24:07,785 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:24:07,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:24:07,786 INFO L85 PathProgramCache]: Analyzing trace with hash 54486468, now seen corresponding path program 1 times [2023-12-02 13:24:07,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:24:07,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404141372] [2023-12-02 13:24:07,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:24:07,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:24:07,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:24:08,047 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 10 proven. 69 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-12-02 13:24:08,047 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:24:08,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404141372] [2023-12-02 13:24:08,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404141372] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:24:08,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612992452] [2023-12-02 13:24:08,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:24:08,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:24:08,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:24:08,049 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:24:08,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 13:24:08,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:24:08,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 1156 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:24:08,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:24:08,631 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-12-02 13:24:08,631 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:24:08,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612992452] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:24:08,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:24:08,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2023-12-02 13:24:08,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561116975] [2023-12-02 13:24:08,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:24:08,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:24:08,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:24:08,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:24:08,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:24:08,633 INFO L87 Difference]: Start difference. First operand 267121 states and 383439 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 2 states have internal predecessors, (135), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 13:24:26,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:24:26,951 INFO L93 Difference]: Finished difference Result 793462 states and 1148884 transitions. [2023-12-02 13:24:26,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:24:26,951 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 2 states have internal predecessors, (135), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 197 [2023-12-02 13:24:26,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:24:28,426 INFO L225 Difference]: With dead ends: 793462 [2023-12-02 13:24:28,426 INFO L226 Difference]: Without dead ends: 527987 [2023-12-02 13:24:29,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:24:29,019 INFO L413 NwaCegarLoop]: 3270 mSDtfsCounter, 3430 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3430 SdHoareTripleChecker+Valid, 3476 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 13:24:29,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3430 Valid, 3476 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 13:24:29,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527987 states. [2023-12-02 13:24:48,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527987 to 525681. [2023-12-02 13:24:48,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525681 states, 458603 states have (on average 1.4294694975828768) internal successors, (655559), 460141 states have internal predecessors, (655559), 47108 states have call successors, (47108), 19968 states have call predecessors, (47108), 19968 states have return successors, (47108), 45572 states have call predecessors, (47108), 47108 states have call successors, (47108) [2023-12-02 13:24:51,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525681 states to 525681 states and 749775 transitions. [2023-12-02 13:24:51,083 INFO L78 Accepts]: Start accepts. Automaton has 525681 states and 749775 transitions. Word has length 197 [2023-12-02 13:24:51,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:24:51,083 INFO L495 AbstractCegarLoop]: Abstraction has 525681 states and 749775 transitions. [2023-12-02 13:24:51,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 2 states have internal predecessors, (135), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 13:24:51,084 INFO L276 IsEmpty]: Start isEmpty. Operand 525681 states and 749775 transitions. [2023-12-02 13:24:51,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2023-12-02 13:24:51,980 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:24:51,981 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, 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] [2023-12-02 13:24:51,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 13:24:52,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:24:52,181 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:24:52,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:24:52,182 INFO L85 PathProgramCache]: Analyzing trace with hash 2064286885, now seen corresponding path program 1 times [2023-12-02 13:24:52,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:24:52,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300088417] [2023-12-02 13:24:52,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:24:52,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:24:52,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:24:52,405 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 10 proven. 69 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-12-02 13:24:52,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:24:52,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300088417] [2023-12-02 13:24:52,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300088417] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:24:52,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873620368] [2023-12-02 13:24:52,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:24:52,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:24:52,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:24:52,407 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:24:52,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6c933e6-f3bb-441f-b226-e18127476ccf/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 13:24:52,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:24:52,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 1150 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 13:24:52,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:24:53,125 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-12-02 13:24:53,125 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:24:53,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873620368] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:24:53,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:24:53,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2023-12-02 13:24:53,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368354436] [2023-12-02 13:24:53,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:24:53,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:24:53,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:24:53,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:24:53,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:24:53,128 INFO L87 Difference]: Start difference. First operand 525681 states and 749775 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 2 states have internal predecessors, (126), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10)