./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.05.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0e7394-b8dc-4a43-83fe-cb0522940800/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0e7394-b8dc-4a43-83fe-cb0522940800/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_1d0e7394-b8dc-4a43-83fe-cb0522940800/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0e7394-b8dc-4a43-83fe-cb0522940800/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.05.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0e7394-b8dc-4a43-83fe-cb0522940800/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_1d0e7394-b8dc-4a43-83fe-cb0522940800/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 a75784c0f203c4a6f14019aef9d9a89ba63a0efbe594dc5cdecfb5d06e7619f2 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 20:08:37,581 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 20:08:37,646 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0e7394-b8dc-4a43-83fe-cb0522940800/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 20:08:37,650 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 20:08:37,651 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 20:08:37,675 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 20:08:37,676 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 20:08:37,676 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 20:08:37,677 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 20:08:37,678 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 20:08:37,678 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 20:08:37,679 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 20:08:37,679 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 20:08:37,680 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 20:08:37,680 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 20:08:37,681 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 20:08:37,681 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 20:08:37,682 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 20:08:37,682 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 20:08:37,683 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 20:08:37,683 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 20:08:37,684 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 20:08:37,684 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 20:08:37,685 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 20:08:37,685 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 20:08:37,686 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 20:08:37,686 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 20:08:37,686 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 20:08:37,687 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 20:08:37,687 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 20:08:37,688 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 20:08:37,688 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 20:08:37,688 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 20:08:37,689 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 20:08:37,689 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 20:08:37,689 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 20:08:37,689 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 20:08:37,690 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 20:08:37,690 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 20:08:37,690 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 20:08:37,690 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 20:08:37,691 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 20:08:37,691 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 20:08:37,691 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 20:08:37,691 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 20:08:37,691 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 20:08:37,692 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 20:08:37,692 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_1d0e7394-b8dc-4a43-83fe-cb0522940800/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0e7394-b8dc-4a43-83fe-cb0522940800/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a75784c0f203c4a6f14019aef9d9a89ba63a0efbe594dc5cdecfb5d06e7619f2 [2023-12-02 20:08:37,907 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 20:08:37,927 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 20:08:37,929 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 20:08:37,930 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 20:08:37,931 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 20:08:37,932 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0e7394-b8dc-4a43-83fe-cb0522940800/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/systemc/token_ring.05.cil-1.c [2023-12-02 20:08:40,632 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 20:08:40,796 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 20:08:40,797 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0e7394-b8dc-4a43-83fe-cb0522940800/sv-benchmarks/c/systemc/token_ring.05.cil-1.c [2023-12-02 20:08:40,808 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0e7394-b8dc-4a43-83fe-cb0522940800/bin/utaipan-verify-nQ1chXbOIh/data/c78c5caee/07a1e39e3c2948dbbe31427ca1b6669e/FLAG13a5dcb3c [2023-12-02 20:08:40,819 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0e7394-b8dc-4a43-83fe-cb0522940800/bin/utaipan-verify-nQ1chXbOIh/data/c78c5caee/07a1e39e3c2948dbbe31427ca1b6669e [2023-12-02 20:08:40,820 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 20:08:40,821 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 20:08:40,822 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 20:08:40,822 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 20:08:40,826 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 20:08:40,827 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:08:40" (1/1) ... [2023-12-02 20:08:40,828 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cb45aec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:08:40, skipping insertion in model container [2023-12-02 20:08:40,828 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:08:40" (1/1) ... [2023-12-02 20:08:40,874 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 20:08:40,995 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_1d0e7394-b8dc-4a43-83fe-cb0522940800/sv-benchmarks/c/systemc/token_ring.05.cil-1.c[671,684] [2023-12-02 20:08:41,069 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 20:08:41,081 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 20:08:41,092 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_1d0e7394-b8dc-4a43-83fe-cb0522940800/sv-benchmarks/c/systemc/token_ring.05.cil-1.c[671,684] [2023-12-02 20:08:41,130 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 20:08:41,145 INFO L206 MainTranslator]: Completed translation [2023-12-02 20:08:41,145 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:08:41 WrapperNode [2023-12-02 20:08:41,145 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 20:08:41,146 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 20:08:41,146 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 20:08:41,146 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 20:08:41,151 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:08:41" (1/1) ... [2023-12-02 20:08:41,160 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:08:41" (1/1) ... [2023-12-02 20:08:41,187 INFO L138 Inliner]: procedures = 38, calls = 46, calls flagged for inlining = 22, calls inlined = 22, statements flattened = 459 [2023-12-02 20:08:41,187 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 20:08:41,188 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 20:08:41,188 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 20:08:41,188 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 20:08:41,198 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:08:41" (1/1) ... [2023-12-02 20:08:41,198 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:08:41" (1/1) ... [2023-12-02 20:08:41,202 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:08:41" (1/1) ... [2023-12-02 20:08:41,202 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:08:41" (1/1) ... [2023-12-02 20:08:41,212 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:08:41" (1/1) ... [2023-12-02 20:08:41,221 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:08:41" (1/1) ... [2023-12-02 20:08:41,223 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:08:41" (1/1) ... [2023-12-02 20:08:41,225 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:08:41" (1/1) ... [2023-12-02 20:08:41,229 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 20:08:41,230 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 20:08:41,230 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 20:08:41,231 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 20:08:41,231 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:08:41" (1/1) ... [2023-12-02 20:08:41,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 20:08:41,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0e7394-b8dc-4a43-83fe-cb0522940800/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:08:41,259 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0e7394-b8dc-4a43-83fe-cb0522940800/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 20:08:41,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0e7394-b8dc-4a43-83fe-cb0522940800/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 20:08:41,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 20:08:41,289 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-12-02 20:08:41,289 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-12-02 20:08:41,289 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-12-02 20:08:41,289 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-12-02 20:08:41,289 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-12-02 20:08:41,290 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-12-02 20:08:41,290 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-12-02 20:08:41,290 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-12-02 20:08:41,290 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-12-02 20:08:41,290 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-12-02 20:08:41,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 20:08:41,291 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-12-02 20:08:41,291 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-12-02 20:08:41,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 20:08:41,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 20:08:41,375 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 20:08:41,377 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 20:08:41,792 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 20:08:42,011 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 20:08:42,011 INFO L309 CfgBuilder]: Removed 8 assume(true) statements. [2023-12-02 20:08:42,013 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:08:42 BoogieIcfgContainer [2023-12-02 20:08:42,013 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 20:08:42,016 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 20:08:42,016 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 20:08:42,019 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 20:08:42,019 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 08:08:40" (1/3) ... [2023-12-02 20:08:42,020 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50ee1232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:08:42, skipping insertion in model container [2023-12-02 20:08:42,020 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:08:41" (2/3) ... [2023-12-02 20:08:42,020 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50ee1232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:08:42, skipping insertion in model container [2023-12-02 20:08:42,020 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:08:42" (3/3) ... [2023-12-02 20:08:42,021 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.05.cil-1.c [2023-12-02 20:08:42,035 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 20:08:42,035 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 20:08:42,077 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 20:08:42,082 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;@364903bf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 20:08:42,083 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 20:08:42,086 INFO L276 IsEmpty]: Start isEmpty. Operand has 117 states, 90 states have (on average 1.488888888888889) internal successors, (134), 92 states have internal predecessors, (134), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-12-02 20:08:42,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 20:08:42,094 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:08:42,095 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] [2023-12-02 20:08:42,096 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:08:42,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:08:42,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1218603751, now seen corresponding path program 1 times [2023-12-02 20:08:42,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:08:42,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237969039] [2023-12-02 20:08:42,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:08:42,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:08:42,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:08:42,413 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 20:08:42,414 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:08:42,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237969039] [2023-12-02 20:08:42,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237969039] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:08:42,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:08:42,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 20:08:42,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537185091] [2023-12-02 20:08:42,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:08:42,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 20:08:42,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:08:42,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 20:08:42,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 20:08:42,458 INFO L87 Difference]: Start difference. First operand has 117 states, 90 states have (on average 1.488888888888889) internal successors, (134), 92 states have internal predecessors, (134), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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 20:08:42,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:08:42,773 INFO L93 Difference]: Finished difference Result 334 states and 508 transitions. [2023-12-02 20:08:42,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 20:08:42,776 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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 45 [2023-12-02 20:08:42,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:08:42,785 INFO L225 Difference]: With dead ends: 334 [2023-12-02 20:08:42,785 INFO L226 Difference]: Without dead ends: 218 [2023-12-02 20:08:42,789 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 20:08:42,793 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 289 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 20:08:42,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 442 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 20:08:42,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2023-12-02 20:08:42,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2023-12-02 20:08:42,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 170 states have (on average 1.411764705882353) internal successors, (240), 172 states have internal predecessors, (240), 34 states have call successors, (34), 12 states have call predecessors, (34), 12 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2023-12-02 20:08:42,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 308 transitions. [2023-12-02 20:08:42,854 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 308 transitions. Word has length 45 [2023-12-02 20:08:42,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:08:42,854 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 308 transitions. [2023-12-02 20:08:42,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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 20:08:42,855 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 308 transitions. [2023-12-02 20:08:42,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-12-02 20:08:42,861 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:08:42,861 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:08:42,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 20:08:42,862 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:08:42,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:08:42,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1012749785, now seen corresponding path program 1 times [2023-12-02 20:08:42,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:08:42,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027417938] [2023-12-02 20:08:42,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:08:42,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:08:42,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:08:43,046 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 20:08:43,047 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:08:43,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027417938] [2023-12-02 20:08:43,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027417938] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:08:43,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666079643] [2023-12-02 20:08:43,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:08:43,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:08:43,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0e7394-b8dc-4a43-83fe-cb0522940800/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:08:43,049 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0e7394-b8dc-4a43-83fe-cb0522940800/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:08:43,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0e7394-b8dc-4a43-83fe-cb0522940800/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 20:08:43,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:08:43,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 20:08:43,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:08:43,330 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 20:08:43,330 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:08:43,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666079643] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:08:43,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 20:08:43,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 20:08:43,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311362685] [2023-12-02 20:08:43,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:08:43,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 20:08:43,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:08:43,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 20:08:43,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 20:08:43,335 INFO L87 Difference]: Start difference. First operand 217 states and 308 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 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 20:08:43,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:08:43,458 INFO L93 Difference]: Finished difference Result 634 states and 913 transitions. [2023-12-02 20:08:43,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 20:08:43,459 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 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 87 [2023-12-02 20:08:43,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:08:43,465 INFO L225 Difference]: With dead ends: 634 [2023-12-02 20:08:43,466 INFO L226 Difference]: Without dead ends: 422 [2023-12-02 20:08:43,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 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 20:08:43,470 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 141 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:08:43,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 300 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:08:43,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2023-12-02 20:08:43,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 418. [2023-12-02 20:08:43,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 331 states have (on average 1.404833836858006) internal successors, (465), 334 states have internal predecessors, (465), 62 states have call successors, (62), 24 states have call predecessors, (62), 24 states have return successors, (62), 60 states have call predecessors, (62), 62 states have call successors, (62) [2023-12-02 20:08:43,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 589 transitions. [2023-12-02 20:08:43,522 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 589 transitions. Word has length 87 [2023-12-02 20:08:43,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:08:43,522 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 589 transitions. [2023-12-02 20:08:43,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 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 20:08:43,523 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 589 transitions. [2023-12-02 20:08:43,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-12-02 20:08:43,529 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:08:43,530 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:08:43,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0e7394-b8dc-4a43-83fe-cb0522940800/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 20:08:43,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0e7394-b8dc-4a43-83fe-cb0522940800/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-12-02 20:08:43,732 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:08:43,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:08:43,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1916621911, now seen corresponding path program 1 times [2023-12-02 20:08:43,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:08:43,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653572098] [2023-12-02 20:08:43,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:08:43,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:08:43,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:08:43,871 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 20:08:43,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:08:43,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653572098] [2023-12-02 20:08:43,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653572098] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:08:43,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194932449] [2023-12-02 20:08:43,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:08:43,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:08:43,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0e7394-b8dc-4a43-83fe-cb0522940800/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:08:43,876 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0e7394-b8dc-4a43-83fe-cb0522940800/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:08:43,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0e7394-b8dc-4a43-83fe-cb0522940800/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 20:08:44,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:08:44,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 20:08:44,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:08:44,084 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 20:08:44,084 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:08:44,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194932449] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:08:44,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 20:08:44,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 20:08:44,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021543636] [2023-12-02 20:08:44,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:08:44,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 20:08:44,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:08:44,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 20:08:44,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 20:08:44,087 INFO L87 Difference]: Start difference. First operand 418 states and 589 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 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 20:08:44,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:08:44,232 INFO L93 Difference]: Finished difference Result 1231 states and 1760 transitions. [2023-12-02 20:08:44,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 20:08:44,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 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 87 [2023-12-02 20:08:44,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:08:44,240 INFO L225 Difference]: With dead ends: 1231 [2023-12-02 20:08:44,240 INFO L226 Difference]: Without dead ends: 818 [2023-12-02 20:08:44,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 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 20:08:44,243 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 138 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:08:44,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 261 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:08:44,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2023-12-02 20:08:44,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 812. [2023-12-02 20:08:44,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 647 states have (on average 1.3956723338485317) internal successors, (903), 652 states have internal predecessors, (903), 116 states have call successors, (116), 48 states have call predecessors, (116), 48 states have return successors, (116), 112 states have call predecessors, (116), 116 states have call successors, (116) [2023-12-02 20:08:44,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1135 transitions. [2023-12-02 20:08:44,300 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1135 transitions. Word has length 87 [2023-12-02 20:08:44,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:08:44,300 INFO L495 AbstractCegarLoop]: Abstraction has 812 states and 1135 transitions. [2023-12-02 20:08:44,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 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 20:08:44,301 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1135 transitions. [2023-12-02 20:08:44,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-12-02 20:08:44,304 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:08:44,304 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:08:44,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0e7394-b8dc-4a43-83fe-cb0522940800/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 20:08:44,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0e7394-b8dc-4a43-83fe-cb0522940800/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:08:44,508 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:08:44,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:08:44,508 INFO L85 PathProgramCache]: Analyzing trace with hash 840165735, now seen corresponding path program 1 times [2023-12-02 20:08:44,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:08:44,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173542558] [2023-12-02 20:08:44,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:08:44,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:08:44,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:08:44,633 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 20:08:44,634 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:08:44,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173542558] [2023-12-02 20:08:44,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173542558] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:08:44,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039857247] [2023-12-02 20:08:44,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:08:44,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:08:44,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0e7394-b8dc-4a43-83fe-cb0522940800/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:08:44,638 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0e7394-b8dc-4a43-83fe-cb0522940800/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:08:44,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0e7394-b8dc-4a43-83fe-cb0522940800/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 20:08:44,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:08:44,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 20:08:44,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:08:44,827 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 20:08:44,827 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:08:44,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039857247] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:08:44,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 20:08:44,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 20:08:44,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160457982] [2023-12-02 20:08:44,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:08:44,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 20:08:44,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:08:44,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 20:08:44,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 20:08:44,830 INFO L87 Difference]: Start difference. First operand 812 states and 1135 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 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 20:08:44,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:08:44,971 INFO L93 Difference]: Finished difference Result 2401 states and 3404 transitions. [2023-12-02 20:08:44,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 20:08:44,971 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 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 87 [2023-12-02 20:08:44,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:08:44,983 INFO L225 Difference]: With dead ends: 2401 [2023-12-02 20:08:44,983 INFO L226 Difference]: Without dead ends: 1594 [2023-12-02 20:08:44,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 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 20:08:44,987 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 132 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:08:44,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 261 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:08:44,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2023-12-02 20:08:45,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1584. [2023-12-02 20:08:45,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1267 states have (on average 1.3851617995264405) internal successors, (1755), 1276 states have internal predecessors, (1755), 220 states have call successors, (220), 96 states have call predecessors, (220), 96 states have return successors, (220), 212 states have call predecessors, (220), 220 states have call successors, (220) [2023-12-02 20:08:45,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 2195 transitions. [2023-12-02 20:08:45,112 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 2195 transitions. Word has length 87 [2023-12-02 20:08:45,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:08:45,112 INFO L495 AbstractCegarLoop]: Abstraction has 1584 states and 2195 transitions. [2023-12-02 20:08:45,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 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 20:08:45,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 2195 transitions. [2023-12-02 20:08:45,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-12-02 20:08:45,116 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:08:45,117 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:08:45,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0e7394-b8dc-4a43-83fe-cb0522940800/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 20:08:45,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0e7394-b8dc-4a43-83fe-cb0522940800/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:08:45,317 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:08:45,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:08:45,318 INFO L85 PathProgramCache]: Analyzing trace with hash -996291163, now seen corresponding path program 1 times [2023-12-02 20:08:45,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:08:45,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471115989] [2023-12-02 20:08:45,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:08:45,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:08:45,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:08:45,423 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 20:08:45,423 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:08:45,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471115989] [2023-12-02 20:08:45,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471115989] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:08:45,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:08:45,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 20:08:45,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055499593] [2023-12-02 20:08:45,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:08:45,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 20:08:45,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:08:45,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 20:08:45,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:08:45,426 INFO L87 Difference]: Start difference. First operand 1584 states and 2195 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 20:08:45,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:08:45,565 INFO L93 Difference]: Finished difference Result 2834 states and 3972 transitions. [2023-12-02 20:08:45,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 20:08:45,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 87 [2023-12-02 20:08:45,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:08:45,580 INFO L225 Difference]: With dead ends: 2834 [2023-12-02 20:08:45,581 INFO L226 Difference]: Without dead ends: 2024 [2023-12-02 20:08:45,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:08:45,584 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 69 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:08:45,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 350 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:08:45,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2024 states. [2023-12-02 20:08:45,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2024 to 1876. [2023-12-02 20:08:45,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1543 states have (on average 1.4173687621516526) internal successors, (2187), 1552 states have internal predecessors, (2187), 228 states have call successors, (228), 104 states have call predecessors, (228), 104 states have return successors, (228), 220 states have call predecessors, (228), 228 states have call successors, (228) [2023-12-02 20:08:45,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 2643 transitions. [2023-12-02 20:08:45,717 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 2643 transitions. Word has length 87 [2023-12-02 20:08:45,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:08:45,718 INFO L495 AbstractCegarLoop]: Abstraction has 1876 states and 2643 transitions. [2023-12-02 20:08:45,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 20:08:45,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 2643 transitions. [2023-12-02 20:08:45,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-12-02 20:08:45,724 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:08:45,724 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:08:45,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 20:08:45,725 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:08:45,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:08:45,725 INFO L85 PathProgramCache]: Analyzing trace with hash 647286552, now seen corresponding path program 1 times [2023-12-02 20:08:45,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:08:45,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088965259] [2023-12-02 20:08:45,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:08:45,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:08:45,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:08:45,804 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-12-02 20:08:45,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:08:45,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088965259] [2023-12-02 20:08:45,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088965259] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:08:45,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:08:45,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 20:08:45,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567517788] [2023-12-02 20:08:45,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:08:45,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 20:08:45,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:08:45,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 20:08:45,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:08:45,806 INFO L87 Difference]: Start difference. First operand 1876 states and 2643 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 20:08:46,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:08:46,012 INFO L93 Difference]: Finished difference Result 5545 states and 7888 transitions. [2023-12-02 20:08:46,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 20:08:46,013 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 117 [2023-12-02 20:08:46,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:08:46,031 INFO L225 Difference]: With dead ends: 5545 [2023-12-02 20:08:46,031 INFO L226 Difference]: Without dead ends: 3674 [2023-12-02 20:08:46,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:08:46,036 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 131 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:08:46,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 263 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:08:46,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3674 states. [2023-12-02 20:08:46,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3674 to 3648. [2023-12-02 20:08:46,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3648 states, 3003 states have (on average 1.4022644022644022) internal successors, (4211), 3020 states have internal predecessors, (4211), 436 states have call successors, (436), 208 states have call predecessors, (436), 208 states have return successors, (436), 420 states have call predecessors, (436), 436 states have call successors, (436) [2023-12-02 20:08:46,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3648 states to 3648 states and 5083 transitions. [2023-12-02 20:08:46,201 INFO L78 Accepts]: Start accepts. Automaton has 3648 states and 5083 transitions. Word has length 117 [2023-12-02 20:08:46,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:08:46,202 INFO L495 AbstractCegarLoop]: Abstraction has 3648 states and 5083 transitions. [2023-12-02 20:08:46,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 20:08:46,202 INFO L276 IsEmpty]: Start isEmpty. Operand 3648 states and 5083 transitions. [2023-12-02 20:08:46,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-12-02 20:08:46,209 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:08:46,210 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:08:46,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 20:08:46,210 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:08:46,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:08:46,210 INFO L85 PathProgramCache]: Analyzing trace with hash -159149480, now seen corresponding path program 1 times [2023-12-02 20:08:46,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:08:46,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499509169] [2023-12-02 20:08:46,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:08:46,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:08:46,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:08:46,266 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-12-02 20:08:46,267 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:08:46,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499509169] [2023-12-02 20:08:46,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499509169] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:08:46,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:08:46,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 20:08:46,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51259948] [2023-12-02 20:08:46,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:08:46,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 20:08:46,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:08:46,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 20:08:46,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:08:46,269 INFO L87 Difference]: Start difference. First operand 3648 states and 5083 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 20:08:46,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:08:46,543 INFO L93 Difference]: Finished difference Result 10789 states and 15168 transitions. [2023-12-02 20:08:46,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 20:08:46,544 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 117 [2023-12-02 20:08:46,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:08:46,576 INFO L225 Difference]: With dead ends: 10789 [2023-12-02 20:08:46,576 INFO L226 Difference]: Without dead ends: 7146 [2023-12-02 20:08:46,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:08:46,587 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 134 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:08:46,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 281 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:08:46,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7146 states. [2023-12-02 20:08:46,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7146 to 7096. [2023-12-02 20:08:46,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7096 states, 5843 states have (on average 1.386103029265788) internal successors, (8099), 5876 states have internal predecessors, (8099), 836 states have call successors, (836), 416 states have call predecessors, (836), 416 states have return successors, (836), 804 states have call predecessors, (836), 836 states have call successors, (836) [2023-12-02 20:08:46,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7096 states to 7096 states and 9771 transitions. [2023-12-02 20:08:46,847 INFO L78 Accepts]: Start accepts. Automaton has 7096 states and 9771 transitions. Word has length 117 [2023-12-02 20:08:46,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:08:46,847 INFO L495 AbstractCegarLoop]: Abstraction has 7096 states and 9771 transitions. [2023-12-02 20:08:46,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 20:08:46,847 INFO L276 IsEmpty]: Start isEmpty. Operand 7096 states and 9771 transitions. [2023-12-02 20:08:46,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-12-02 20:08:46,866 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:08:46,866 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:08:46,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 20:08:46,866 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:08:46,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:08:46,867 INFO L85 PathProgramCache]: Analyzing trace with hash -728759386, now seen corresponding path program 1 times [2023-12-02 20:08:46,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:08:46,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673290824] [2023-12-02 20:08:46,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:08:46,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:08:46,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:08:47,032 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-12-02 20:08:47,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:08:47,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673290824] [2023-12-02 20:08:47,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673290824] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:08:47,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227701962] [2023-12-02 20:08:47,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:08:47,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:08:47,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0e7394-b8dc-4a43-83fe-cb0522940800/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:08:47,034 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0e7394-b8dc-4a43-83fe-cb0522940800/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:08:47,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0e7394-b8dc-4a43-83fe-cb0522940800/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 20:08:47,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:08:47,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 20:08:47,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:08:47,243 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 20:08:47,244 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:08:47,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227701962] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:08:47,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 20:08:47,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-12-02 20:08:47,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514129243] [2023-12-02 20:08:47,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:08:47,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 20:08:47,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:08:47,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 20:08:47,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 20:08:47,246 INFO L87 Difference]: Start difference. First operand 7096 states and 9771 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 20:08:47,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:08:47,604 INFO L93 Difference]: Finished difference Result 13452 states and 18701 transitions. [2023-12-02 20:08:47,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 20:08:47,605 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), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 137 [2023-12-02 20:08:47,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:08:47,656 INFO L225 Difference]: With dead ends: 13452 [2023-12-02 20:08:47,657 INFO L226 Difference]: Without dead ends: 9834 [2023-12-02 20:08:47,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 20:08:47,668 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 100 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:08:47,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 374 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:08:47,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9834 states. [2023-12-02 20:08:47,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9834 to 8600. [2023-12-02 20:08:47,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8600 states, 7251 states have (on average 1.4126327403116812) internal successors, (10243), 7284 states have internal predecessors, (10243), 884 states have call successors, (884), 464 states have call predecessors, (884), 464 states have return successors, (884), 852 states have call predecessors, (884), 884 states have call successors, (884) [2023-12-02 20:08:48,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8600 states to 8600 states and 12011 transitions. [2023-12-02 20:08:48,008 INFO L78 Accepts]: Start accepts. Automaton has 8600 states and 12011 transitions. Word has length 137 [2023-12-02 20:08:48,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:08:48,009 INFO L495 AbstractCegarLoop]: Abstraction has 8600 states and 12011 transitions. [2023-12-02 20:08:48,009 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), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-02 20:08:48,009 INFO L276 IsEmpty]: Start isEmpty. Operand 8600 states and 12011 transitions. [2023-12-02 20:08:48,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-12-02 20:08:48,028 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:08:48,028 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:08:48,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0e7394-b8dc-4a43-83fe-cb0522940800/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 20:08:48,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0e7394-b8dc-4a43-83fe-cb0522940800/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:08:48,229 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:08:48,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:08:48,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1759730567, now seen corresponding path program 2 times [2023-12-02 20:08:48,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:08:48,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373699803] [2023-12-02 20:08:48,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:08:48,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:08:48,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:08:48,475 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-12-02 20:08:48,475 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:08:48,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373699803] [2023-12-02 20:08:48,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373699803] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:08:48,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802981531] [2023-12-02 20:08:48,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 20:08:48,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:08:48,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0e7394-b8dc-4a43-83fe-cb0522940800/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:08:48,477 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0e7394-b8dc-4a43-83fe-cb0522940800/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:08:48,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d0e7394-b8dc-4a43-83fe-cb0522940800/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 20:08:48,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 20:08:48,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 20:08:48,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 20:08:48,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:08:48,872 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 63 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 20:08:48,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:08:49,259 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-02 20:08:49,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802981531] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:08:49,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2003730623] [2023-12-02 20:08:49,278 INFO L159 IcfgInterpreter]: Started Sifa with 72 locations of interest [2023-12-02 20:08:49,278 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:08:49,281 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:08:49,285 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:08:49,285 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:08:56,453 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 139 for LOIs [2023-12-02 20:08:56,594 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 13 [2023-12-02 20:08:56,676 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 8192 conjunctions. This might take some time... [2023-12-02 20:09:05,163 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 8192 conjunctions. [2023-12-02 20:09:05,494 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 13 [2023-12-02 20:09:05,590 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 8192 conjunctions. This might take some time... [2023-12-02 20:09:14,006 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 8192 conjunctions.