./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label47+token_ring.01.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label47+token_ring.01.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 71780e949a27f12e7706a9946f56044d573802d6ede7cb0db653ad266c4ea0c6 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:58:00,989 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:58:01,132 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:58:01,147 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:58:01,148 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:58:01,202 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:58:01,203 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:58:01,204 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:58:01,206 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:58:01,212 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:58:01,213 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:58:01,214 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:58:01,214 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:58:01,217 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:58:01,217 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:58:01,218 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:58:01,219 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:58:01,219 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:58:01,220 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:58:01,220 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:58:01,221 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:58:01,222 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:58:01,223 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:58:01,224 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:58:01,225 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:58:01,225 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:58:01,226 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:58:01,226 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:58:01,227 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:58:01,228 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:58:01,229 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:58:01,230 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:58:01,230 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:58:01,231 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:58:01,231 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:58:01,232 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:58:01,232 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:58:01,232 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:58:01,233 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:58:01,233 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:58:01,234 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:58:01,234 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:58:01,235 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:58:01,235 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:58:01,236 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:58:01,236 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_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71780e949a27f12e7706a9946f56044d573802d6ede7cb0db653ad266c4ea0c6 [2023-11-19 04:58:01,585 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:58:01,613 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:58:01,617 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:58:01,618 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:58:01,619 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:58:01,621 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/combinations/Problem05_label47+token_ring.01.cil-1.c [2023-11-19 04:58:05,077 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:58:05,887 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:58:05,888 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/sv-benchmarks/c/combinations/Problem05_label47+token_ring.01.cil-1.c [2023-11-19 04:58:05,947 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/data/d555a74c9/0d3c9c7df94a4b5ca61940eb8cff298d/FLAGde627c879 [2023-11-19 04:58:05,967 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/data/d555a74c9/0d3c9c7df94a4b5ca61940eb8cff298d [2023-11-19 04:58:05,976 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:58:05,980 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:58:05,984 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:58:05,984 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:58:05,991 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:58:05,992 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:58:05" (1/1) ... [2023-11-19 04:58:05,994 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4749b0b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:05, skipping insertion in model container [2023-11-19 04:58:05,994 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:58:05" (1/1) ... [2023-11-19 04:58:06,338 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:58:08,917 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_7d286486-412a-4a4b-a5ae-b9d4c923b259/sv-benchmarks/c/combinations/Problem05_label47+token_ring.01.cil-1.c[377612,377625] [2023-11-19 04:58:08,960 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_7d286486-412a-4a4b-a5ae-b9d4c923b259/sv-benchmarks/c/combinations/Problem05_label47+token_ring.01.cil-1.c[383339,383352] [2023-11-19 04:58:09,173 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:58:09,188 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:58:10,638 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_7d286486-412a-4a4b-a5ae-b9d4c923b259/sv-benchmarks/c/combinations/Problem05_label47+token_ring.01.cil-1.c[377612,377625] [2023-11-19 04:58:10,649 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_7d286486-412a-4a4b-a5ae-b9d4c923b259/sv-benchmarks/c/combinations/Problem05_label47+token_ring.01.cil-1.c[383339,383352] [2023-11-19 04:58:10,659 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:58:10,799 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:58:10,800 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:10 WrapperNode [2023-11-19 04:58:10,800 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:58:10,801 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:58:10,801 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:58:10,801 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:58:10,809 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:10" (1/1) ... [2023-11-19 04:58:10,925 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:10" (1/1) ... [2023-11-19 04:58:11,258 INFO L138 Inliner]: procedures = 46, calls = 44, calls flagged for inlining = 24, calls inlined = 24, statements flattened = 12568 [2023-11-19 04:58:11,258 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:58:11,259 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:58:11,260 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:58:11,260 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:58:11,272 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:10" (1/1) ... [2023-11-19 04:58:11,272 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:10" (1/1) ... [2023-11-19 04:58:11,443 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:10" (1/1) ... [2023-11-19 04:58:11,443 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:10" (1/1) ... [2023-11-19 04:58:11,704 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:10" (1/1) ... [2023-11-19 04:58:11,775 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:10" (1/1) ... [2023-11-19 04:58:11,821 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:10" (1/1) ... [2023-11-19 04:58:11,866 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:10" (1/1) ... [2023-11-19 04:58:11,981 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:58:11,982 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:58:11,982 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:58:11,982 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:58:11,999 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:10" (1/1) ... [2023-11-19 04:58:12,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:58:12,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:12,039 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:58:12,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:58:12,089 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:58:12,089 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-19 04:58:12,090 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-19 04:58:12,090 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-19 04:58:12,090 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-19 04:58:12,090 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-19 04:58:12,091 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-19 04:58:12,091 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-19 04:58:12,091 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-19 04:58:12,091 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-19 04:58:12,091 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-19 04:58:12,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:58:12,092 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-19 04:58:12,092 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-19 04:58:12,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:58:12,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:58:12,313 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:58:12,315 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:58:22,232 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:58:24,541 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:58:24,541 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-19 04:58:24,559 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:58:24 BoogieIcfgContainer [2023-11-19 04:58:24,559 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:58:24,562 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:58:24,563 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:58:24,566 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:58:24,567 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:58:05" (1/3) ... [2023-11-19 04:58:24,568 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26621826 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:58:24, skipping insertion in model container [2023-11-19 04:58:24,568 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:10" (2/3) ... [2023-11-19 04:58:24,568 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26621826 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:58:24, skipping insertion in model container [2023-11-19 04:58:24,569 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:58:24" (3/3) ... [2023-11-19 04:58:24,570 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label47+token_ring.01.cil-1.c [2023-11-19 04:58:24,591 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:58:24,591 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-19 04:58:24,707 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:58:24,715 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;@39ec8332, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:58:24,715 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-19 04:58:24,734 INFO L276 IsEmpty]: Start isEmpty. Operand has 1712 states, 1688 states have (on average 1.978080568720379) internal successors, (3339), 1691 states have internal predecessors, (3339), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-19 04:58:24,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-19 04:58:24,748 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:24,749 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] [2023-11-19 04:58:24,751 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:24,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:24,759 INFO L85 PathProgramCache]: Analyzing trace with hash 803830401, now seen corresponding path program 1 times [2023-11-19 04:58:24,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:24,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007043705] [2023-11-19 04:58:24,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:24,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:24,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:25,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:58:25,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:25,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007043705] [2023-11-19 04:58:25,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007043705] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:25,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:58:25,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:58:25,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264001998] [2023-11-19 04:58:25,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:25,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:58:25,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:25,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:58:25,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:58:25,253 INFO L87 Difference]: Start difference. First operand has 1712 states, 1688 states have (on average 1.978080568720379) internal successors, (3339), 1691 states have internal predecessors, (3339), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 04:58:26,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:26,280 INFO L93 Difference]: Finished difference Result 3476 states and 6817 transitions. [2023-11-19 04:58:26,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:58:26,282 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 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 34 [2023-11-19 04:58:26,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:26,315 INFO L225 Difference]: With dead ends: 3476 [2023-11-19 04:58:26,316 INFO L226 Difference]: Without dead ends: 1763 [2023-11-19 04:58:26,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:58:26,333 INFO L413 NwaCegarLoop]: 3185 mSDtfsCounter, 3420 mSDsluCounter, 3131 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3420 SdHoareTripleChecker+Valid, 6316 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:26,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3420 Valid, 6316 Invalid, 564 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 04:58:26,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1763 states. [2023-11-19 04:58:26,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1763 to 1762. [2023-11-19 04:58:26,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1762 states, 1722 states have (on average 1.9581881533101044) internal successors, (3372), 1725 states have internal predecessors, (3372), 26 states have call successors, (26), 12 states have call predecessors, (26), 12 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-19 04:58:26,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1762 states to 1762 states and 3424 transitions. [2023-11-19 04:58:26,613 INFO L78 Accepts]: Start accepts. Automaton has 1762 states and 3424 transitions. Word has length 34 [2023-11-19 04:58:26,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:26,613 INFO L495 AbstractCegarLoop]: Abstraction has 1762 states and 3424 transitions. [2023-11-19 04:58:26,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 04:58:26,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1762 states and 3424 transitions. [2023-11-19 04:58:26,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-19 04:58:26,618 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:26,619 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 04:58:26,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:58:26,620 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:26,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:26,620 INFO L85 PathProgramCache]: Analyzing trace with hash -641499721, now seen corresponding path program 1 times [2023-11-19 04:58:26,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:26,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721982328] [2023-11-19 04:58:26,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:26,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:26,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:27,131 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 04:58:27,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:27,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721982328] [2023-11-19 04:58:27,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721982328] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:27,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:58:27,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 04:58:27,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774943177] [2023-11-19 04:58:27,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:27,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:58:27,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:27,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:58:27,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:58:27,137 INFO L87 Difference]: Start difference. First operand 1762 states and 3424 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-19 04:58:28,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:28,200 INFO L93 Difference]: Finished difference Result 1980 states and 3696 transitions. [2023-11-19 04:58:28,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 04:58:28,201 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 60 [2023-11-19 04:58:28,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:28,219 INFO L225 Difference]: With dead ends: 1980 [2023-11-19 04:58:28,220 INFO L226 Difference]: Without dead ends: 1865 [2023-11-19 04:58:28,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-11-19 04:58:28,225 INFO L413 NwaCegarLoop]: 3144 mSDtfsCounter, 3420 mSDsluCounter, 6230 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3430 SdHoareTripleChecker+Valid, 9374 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:28,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3430 Valid, 9374 Invalid, 815 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [57 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 04:58:28,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1865 states. [2023-11-19 04:58:28,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1865 to 1863. [2023-11-19 04:58:28,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1791 states have (on average 1.9290898939140144) internal successors, (3455), 1795 states have internal predecessors, (3455), 46 states have call successors, (46), 24 states have call predecessors, (46), 24 states have return successors, (46), 44 states have call predecessors, (46), 46 states have call successors, (46) [2023-11-19 04:58:28,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 3547 transitions. [2023-11-19 04:58:28,325 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 3547 transitions. Word has length 60 [2023-11-19 04:58:28,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:28,327 INFO L495 AbstractCegarLoop]: Abstraction has 1863 states and 3547 transitions. [2023-11-19 04:58:28,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-19 04:58:28,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 3547 transitions. [2023-11-19 04:58:28,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-19 04:58:28,338 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:28,339 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 04:58:28,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:58:28,340 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:28,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:28,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1798526034, now seen corresponding path program 1 times [2023-11-19 04:58:28,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:28,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599209135] [2023-11-19 04:58:28,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:28,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:28,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:28,510 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 04:58:28,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:28,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599209135] [2023-11-19 04:58:28,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599209135] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:28,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:58:28,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:58:28,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895467733] [2023-11-19 04:58:28,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:28,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:58:28,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:28,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:58:28,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:58:28,514 INFO L87 Difference]: Start difference. First operand 1863 states and 3547 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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) [2023-11-19 04:58:29,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:29,121 INFO L93 Difference]: Finished difference Result 2031 states and 3757 transitions. [2023-11-19 04:58:29,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:58:29,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 62 [2023-11-19 04:58:29,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:29,137 INFO L225 Difference]: With dead ends: 2031 [2023-11-19 04:58:29,138 INFO L226 Difference]: Without dead ends: 1917 [2023-11-19 04:58:29,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:58:29,143 INFO L413 NwaCegarLoop]: 3159 mSDtfsCounter, 27 mSDsluCounter, 3127 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 6286 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:29,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 6286 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 04:58:29,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1917 states. [2023-11-19 04:58:29,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1917 to 1887. [2023-11-19 04:58:29,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1811 states have (on average 1.9221424627277748) internal successors, (3481), 1815 states have internal predecessors, (3481), 48 states have call successors, (48), 26 states have call predecessors, (48), 26 states have return successors, (48), 46 states have call predecessors, (48), 48 states have call successors, (48) [2023-11-19 04:58:29,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 3577 transitions. [2023-11-19 04:58:29,238 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 3577 transitions. Word has length 62 [2023-11-19 04:58:29,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:29,241 INFO L495 AbstractCegarLoop]: Abstraction has 1887 states and 3577 transitions. [2023-11-19 04:58:29,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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) [2023-11-19 04:58:29,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 3577 transitions. [2023-11-19 04:58:29,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-11-19 04:58:29,245 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:29,246 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 04:58:29,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:58:29,247 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:29,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:29,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1746599359, now seen corresponding path program 1 times [2023-11-19 04:58:29,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:29,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272888403] [2023-11-19 04:58:29,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:29,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:29,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:29,335 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-19 04:58:29,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:29,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272888403] [2023-11-19 04:58:29,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272888403] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:29,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:58:29,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:58:29,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776754110] [2023-11-19 04:58:29,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:29,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:58:29,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:29,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:58:29,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:58:29,339 INFO L87 Difference]: Start difference. First operand 1887 states and 3577 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2023-11-19 04:58:29,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:29,849 INFO L93 Difference]: Finished difference Result 2248 states and 4033 transitions. [2023-11-19 04:58:29,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:58:29,850 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 78 [2023-11-19 04:58:29,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:29,866 INFO L225 Difference]: With dead ends: 2248 [2023-11-19 04:58:29,866 INFO L226 Difference]: Without dead ends: 2007 [2023-11-19 04:58:29,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:58:29,870 INFO L413 NwaCegarLoop]: 3159 mSDtfsCounter, 3324 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3324 SdHoareTripleChecker+Valid, 3221 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:29,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3324 Valid, 3221 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:58:29,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2007 states. [2023-11-19 04:58:29,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2007 to 2002. [2023-11-19 04:58:29,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2002 states, 1892 states have (on average 1.890063424947146) internal successors, (3576), 1897 states have internal predecessors, (3576), 69 states have call successors, (69), 39 states have call predecessors, (69), 39 states have return successors, (69), 66 states have call predecessors, (69), 69 states have call successors, (69) [2023-11-19 04:58:29,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2002 states to 2002 states and 3714 transitions. [2023-11-19 04:58:29,963 INFO L78 Accepts]: Start accepts. Automaton has 2002 states and 3714 transitions. Word has length 78 [2023-11-19 04:58:29,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:29,964 INFO L495 AbstractCegarLoop]: Abstraction has 2002 states and 3714 transitions. [2023-11-19 04:58:29,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2023-11-19 04:58:29,964 INFO L276 IsEmpty]: Start isEmpty. Operand 2002 states and 3714 transitions. [2023-11-19 04:58:29,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-19 04:58:29,967 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:29,967 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-19 04:58:29,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 04:58:29,968 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:29,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:29,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1378328151, now seen corresponding path program 1 times [2023-11-19 04:58:29,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:29,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410251164] [2023-11-19 04:58:29,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:29,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:29,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:30,078 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-19 04:58:30,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:30,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410251164] [2023-11-19 04:58:30,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410251164] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:58:30,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125291302] [2023-11-19 04:58:30,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:30,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:30,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:30,082 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:58:30,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:58:30,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:30,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:58:30,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:58:30,282 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 04:58:30,283 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:58:30,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125291302] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:30,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:58:30,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-19 04:58:30,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636568256] [2023-11-19 04:58:30,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:30,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:58:30,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:30,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:58:30,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:58:30,286 INFO L87 Difference]: Start difference. First operand 2002 states and 3714 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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) [2023-11-19 04:58:30,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:30,831 INFO L93 Difference]: Finished difference Result 2317 states and 4109 transitions. [2023-11-19 04:58:30,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:58:30,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 90 [2023-11-19 04:58:30,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:30,847 INFO L225 Difference]: With dead ends: 2317 [2023-11-19 04:58:30,847 INFO L226 Difference]: Without dead ends: 2077 [2023-11-19 04:58:30,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:58:30,850 INFO L413 NwaCegarLoop]: 3156 mSDtfsCounter, 36 mSDsluCounter, 3128 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 6284 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:30,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 6284 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 04:58:30,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2077 states. [2023-11-19 04:58:30,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2077 to 2030. [2023-11-19 04:58:30,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2030 states, 1914 states have (on average 1.8834900731452455) internal successors, (3605), 1919 states have internal predecessors, (3605), 72 states have call successors, (72), 42 states have call predecessors, (72), 42 states have return successors, (72), 69 states have call predecessors, (72), 72 states have call successors, (72) [2023-11-19 04:58:30,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 3749 transitions. [2023-11-19 04:58:30,932 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 3749 transitions. Word has length 90 [2023-11-19 04:58:30,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:30,933 INFO L495 AbstractCegarLoop]: Abstraction has 2030 states and 3749 transitions. [2023-11-19 04:58:30,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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) [2023-11-19 04:58:30,934 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 3749 transitions. [2023-11-19 04:58:30,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-19 04:58:30,936 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:30,936 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-19 04:58:30,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 04:58:31,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:31,151 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:31,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:31,152 INFO L85 PathProgramCache]: Analyzing trace with hash -461492905, now seen corresponding path program 2 times [2023-11-19 04:58:31,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:31,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709018964] [2023-11-19 04:58:31,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:31,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:31,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:31,394 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-19 04:58:31,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:31,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709018964] [2023-11-19 04:58:31,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709018964] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:58:31,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770788070] [2023-11-19 04:58:31,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 04:58:31,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:31,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:31,400 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:58:31,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:58:31,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 04:58:31,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:58:31,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:58:31,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:58:31,545 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-19 04:58:31,545 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:58:31,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770788070] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:31,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:58:31,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-19 04:58:31,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585154061] [2023-11-19 04:58:31,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:31,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:58:31,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:31,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:58:31,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:58:31,550 INFO L87 Difference]: Start difference. First operand 2030 states and 3749 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 04:58:32,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:32,079 INFO L93 Difference]: Finished difference Result 2302 states and 4104 transitions. [2023-11-19 04:58:32,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:58:32,080 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 90 [2023-11-19 04:58:32,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:32,093 INFO L225 Difference]: With dead ends: 2302 [2023-11-19 04:58:32,093 INFO L226 Difference]: Without dead ends: 2034 [2023-11-19 04:58:32,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:58:32,100 INFO L413 NwaCegarLoop]: 3152 mSDtfsCounter, 68 mSDsluCounter, 3119 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 6271 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:32,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 6271 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:58:32,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2034 states. [2023-11-19 04:58:32,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2034 to 2028. [2023-11-19 04:58:32,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 1912 states have (on average 1.87918410041841) internal successors, (3593), 1917 states have internal predecessors, (3593), 72 states have call successors, (72), 42 states have call predecessors, (72), 42 states have return successors, (72), 69 states have call predecessors, (72), 72 states have call successors, (72) [2023-11-19 04:58:32,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 3737 transitions. [2023-11-19 04:58:32,272 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 3737 transitions. Word has length 90 [2023-11-19 04:58:32,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:32,273 INFO L495 AbstractCegarLoop]: Abstraction has 2028 states and 3737 transitions. [2023-11-19 04:58:32,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 04:58:32,274 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 3737 transitions. [2023-11-19 04:58:32,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-19 04:58:32,280 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:32,281 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 04:58:32,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:58:32,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:32,495 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:32,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:32,496 INFO L85 PathProgramCache]: Analyzing trace with hash 112004855, now seen corresponding path program 1 times [2023-11-19 04:58:32,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:32,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366569900] [2023-11-19 04:58:32,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:32,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:32,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:32,678 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-19 04:58:32,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:32,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366569900] [2023-11-19 04:58:32,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366569900] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:58:32,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399839345] [2023-11-19 04:58:32,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:32,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:32,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:32,681 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:58:32,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:58:32,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:32,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:58:32,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:58:32,832 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-19 04:58:32,833 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:58:32,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399839345] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:32,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:58:32,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-19 04:58:32,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880667780] [2023-11-19 04:58:32,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:32,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:58:32,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:32,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:58:32,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:58:32,836 INFO L87 Difference]: Start difference. First operand 2028 states and 3737 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, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 04:58:33,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:33,329 INFO L93 Difference]: Finished difference Result 2345 states and 4122 transitions. [2023-11-19 04:58:33,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:58:33,330 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, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 90 [2023-11-19 04:58:33,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:33,344 INFO L225 Difference]: With dead ends: 2345 [2023-11-19 04:58:33,344 INFO L226 Difference]: Without dead ends: 2089 [2023-11-19 04:58:33,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:58:33,347 INFO L413 NwaCegarLoop]: 3133 mSDtfsCounter, 3334 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3334 SdHoareTripleChecker+Valid, 3147 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:33,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3334 Valid, 3147 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:58:33,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2023-11-19 04:58:33,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 2089. [2023-11-19 04:58:33,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2089 states, 1963 states have (on average 1.857870606214977) internal successors, (3647), 1968 states have internal predecessors, (3647), 74 states have call successors, (74), 50 states have call predecessors, (74), 50 states have return successors, (74), 71 states have call predecessors, (74), 74 states have call successors, (74) [2023-11-19 04:58:33,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2089 states to 2089 states and 3795 transitions. [2023-11-19 04:58:33,444 INFO L78 Accepts]: Start accepts. Automaton has 2089 states and 3795 transitions. Word has length 90 [2023-11-19 04:58:33,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:33,445 INFO L495 AbstractCegarLoop]: Abstraction has 2089 states and 3795 transitions. [2023-11-19 04:58:33,445 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, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 04:58:33,446 INFO L276 IsEmpty]: Start isEmpty. Operand 2089 states and 3795 transitions. [2023-11-19 04:58:33,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-19 04:58:33,450 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:33,450 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 04:58:33,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 04:58:33,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:33,660 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:33,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:33,660 INFO L85 PathProgramCache]: Analyzing trace with hash 919213408, now seen corresponding path program 1 times [2023-11-19 04:58:33,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:33,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146856322] [2023-11-19 04:58:33,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:33,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:33,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:33,877 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-19 04:58:33,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:33,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146856322] [2023-11-19 04:58:33,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146856322] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:58:33,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003964125] [2023-11-19 04:58:33,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:33,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:33,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:33,880 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:58:33,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 04:58:34,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:34,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:58:34,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:58:34,051 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:58:34,051 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:58:34,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003964125] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:34,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:58:34,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-19 04:58:34,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322760218] [2023-11-19 04:58:34,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:34,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:58:34,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:34,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:58:34,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:58:34,055 INFO L87 Difference]: Start difference. First operand 2089 states and 3795 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 04:58:34,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:34,677 INFO L93 Difference]: Finished difference Result 2698 states and 4514 transitions. [2023-11-19 04:58:34,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:58:34,678 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 91 [2023-11-19 04:58:34,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:34,693 INFO L225 Difference]: With dead ends: 2698 [2023-11-19 04:58:34,693 INFO L226 Difference]: Without dead ends: 2256 [2023-11-19 04:58:34,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:58:34,697 INFO L413 NwaCegarLoop]: 3142 mSDtfsCounter, 32 mSDsluCounter, 3117 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 6259 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:34,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 6259 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 04:58:34,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2023-11-19 04:58:34,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 2136. [2023-11-19 04:58:34,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2136 states, 1998 states have (on average 1.8463463463463463) internal successors, (3689), 2004 states have internal predecessors, (3689), 80 states have call successors, (80), 56 states have call predecessors, (80), 56 states have return successors, (80), 76 states have call predecessors, (80), 80 states have call successors, (80) [2023-11-19 04:58:34,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 3849 transitions. [2023-11-19 04:58:34,796 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 3849 transitions. Word has length 91 [2023-11-19 04:58:34,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:34,797 INFO L495 AbstractCegarLoop]: Abstraction has 2136 states and 3849 transitions. [2023-11-19 04:58:34,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 04:58:34,797 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 3849 transitions. [2023-11-19 04:58:34,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-19 04:58:34,804 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:34,804 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 04:58:34,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 04:58:35,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:35,027 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:35,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:35,028 INFO L85 PathProgramCache]: Analyzing trace with hash -136691119, now seen corresponding path program 1 times [2023-11-19 04:58:35,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:35,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807490758] [2023-11-19 04:58:35,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:35,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:35,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:35,237 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-19 04:58:35,238 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:35,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807490758] [2023-11-19 04:58:35,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807490758] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:35,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:58:35,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:58:35,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175736554] [2023-11-19 04:58:35,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:35,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:58:35,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:35,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:58:35,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:58:35,241 INFO L87 Difference]: Start difference. First operand 2136 states and 3849 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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) [2023-11-19 04:58:36,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:36,104 INFO L93 Difference]: Finished difference Result 2906 states and 4768 transitions. [2023-11-19 04:58:36,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:58:36,105 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 93 [2023-11-19 04:58:36,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:36,123 INFO L225 Difference]: With dead ends: 2906 [2023-11-19 04:58:36,123 INFO L226 Difference]: Without dead ends: 2654 [2023-11-19 04:58:36,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:58:36,128 INFO L413 NwaCegarLoop]: 3180 mSDtfsCounter, 3397 mSDsluCounter, 3136 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3397 SdHoareTripleChecker+Valid, 6316 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:36,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3397 Valid, 6316 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 04:58:36,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2654 states. [2023-11-19 04:58:36,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2654 to 2452. [2023-11-19 04:58:36,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 2228 states have (on average 1.7809694793536803) internal successors, (3968), 2233 states have internal predecessors, (3968), 131 states have call successors, (131), 91 states have call predecessors, (131), 91 states have return successors, (131), 128 states have call predecessors, (131), 131 states have call successors, (131) [2023-11-19 04:58:36,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 4230 transitions. [2023-11-19 04:58:36,298 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 4230 transitions. Word has length 93 [2023-11-19 04:58:36,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:36,298 INFO L495 AbstractCegarLoop]: Abstraction has 2452 states and 4230 transitions. [2023-11-19 04:58:36,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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) [2023-11-19 04:58:36,299 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 4230 transitions. [2023-11-19 04:58:36,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-19 04:58:36,310 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:36,310 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:58:36,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 04:58:36,311 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:36,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:36,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1783926717, now seen corresponding path program 1 times [2023-11-19 04:58:36,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:36,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881584528] [2023-11-19 04:58:36,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:36,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:36,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:36,556 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 17 proven. 14 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-19 04:58:36,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:36,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881584528] [2023-11-19 04:58:36,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881584528] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:58:36,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932005109] [2023-11-19 04:58:36,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:36,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:36,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:36,559 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:58:36,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 04:58:36,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:36,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 04:58:36,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:58:36,862 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-19 04:58:36,863 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:58:36,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932005109] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:36,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:58:36,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2023-11-19 04:58:36,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737767917] [2023-11-19 04:58:36,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:36,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:58:36,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:36,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:58:36,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-11-19 04:58:36,867 INFO L87 Difference]: Start difference. First operand 2452 states and 4230 transitions. Second operand has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-19 04:58:38,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:38,275 INFO L93 Difference]: Finished difference Result 2960 states and 4838 transitions. [2023-11-19 04:58:38,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 04:58:38,276 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 100 [2023-11-19 04:58:38,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:38,293 INFO L225 Difference]: With dead ends: 2960 [2023-11-19 04:58:38,293 INFO L226 Difference]: Without dead ends: 2464 [2023-11-19 04:58:38,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-11-19 04:58:38,297 INFO L413 NwaCegarLoop]: 3163 mSDtfsCounter, 51 mSDsluCounter, 12590 mSDsCounter, 0 mSdLazyCounter, 1220 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 15753 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:38,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 15753 Invalid, 1223 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 1220 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-19 04:58:38,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2464 states. [2023-11-19 04:58:38,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2464 to 2414. [2023-11-19 04:58:38,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2414 states, 2201 states have (on average 1.7873693775556565) internal successors, (3934), 2206 states have internal predecessors, (3934), 124 states have call successors, (124), 87 states have call predecessors, (124), 87 states have return successors, (124), 121 states have call predecessors, (124), 124 states have call successors, (124) [2023-11-19 04:58:38,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2414 states to 2414 states and 4182 transitions. [2023-11-19 04:58:38,471 INFO L78 Accepts]: Start accepts. Automaton has 2414 states and 4182 transitions. Word has length 100 [2023-11-19 04:58:38,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:38,472 INFO L495 AbstractCegarLoop]: Abstraction has 2414 states and 4182 transitions. [2023-11-19 04:58:38,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-19 04:58:38,472 INFO L276 IsEmpty]: Start isEmpty. Operand 2414 states and 4182 transitions. [2023-11-19 04:58:38,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-19 04:58:38,475 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:38,476 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:58:38,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 04:58:38,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 04:58:38,699 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:38,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:38,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1582197113, now seen corresponding path program 1 times [2023-11-19 04:58:38,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:38,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934876370] [2023-11-19 04:58:38,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:38,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:38,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:39,715 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 19 proven. 21 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-19 04:58:39,716 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:39,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934876370] [2023-11-19 04:58:39,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934876370] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:58:39,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515343317] [2023-11-19 04:58:39,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:39,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:39,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:39,719 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:58:39,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 04:58:39,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:39,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-19 04:58:39,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:58:40,196 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-19 04:58:40,196 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:58:40,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515343317] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:40,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:58:40,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18] total 22 [2023-11-19 04:58:40,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814357120] [2023-11-19 04:58:40,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:40,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 04:58:40,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:40,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 04:58:40,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2023-11-19 04:58:40,202 INFO L87 Difference]: Start difference. First operand 2414 states and 4182 transitions. Second operand has 9 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-19 04:58:41,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:41,912 INFO L93 Difference]: Finished difference Result 2973 states and 4849 transitions. [2023-11-19 04:58:41,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 04:58:41,912 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 103 [2023-11-19 04:58:41,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:41,931 INFO L225 Difference]: With dead ends: 2973 [2023-11-19 04:58:41,931 INFO L226 Difference]: Without dead ends: 2536 [2023-11-19 04:58:41,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2023-11-19 04:58:41,935 INFO L413 NwaCegarLoop]: 3104 mSDtfsCounter, 3504 mSDsluCounter, 12376 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3518 SdHoareTripleChecker+Valid, 15480 SdHoareTripleChecker+Invalid, 1481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:41,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3518 Valid, 15480 Invalid, 1481 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [124 Valid, 1357 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-19 04:58:41,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2536 states. [2023-11-19 04:58:42,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2536 to 2374. [2023-11-19 04:58:42,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2374 states, 2177 states have (on average 1.788240698208544) internal successors, (3893), 2182 states have internal predecessors, (3893), 113 states have call successors, (113), 82 states have call predecessors, (113), 82 states have return successors, (113), 110 states have call predecessors, (113), 113 states have call successors, (113) [2023-11-19 04:58:42,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2374 states to 2374 states and 4119 transitions. [2023-11-19 04:58:42,118 INFO L78 Accepts]: Start accepts. Automaton has 2374 states and 4119 transitions. Word has length 103 [2023-11-19 04:58:42,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:42,118 INFO L495 AbstractCegarLoop]: Abstraction has 2374 states and 4119 transitions. [2023-11-19 04:58:42,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-19 04:58:42,119 INFO L276 IsEmpty]: Start isEmpty. Operand 2374 states and 4119 transitions. [2023-11-19 04:58:42,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-19 04:58:42,122 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:42,122 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:58:42,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 04:58:42,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 04:58:42,335 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:42,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:42,336 INFO L85 PathProgramCache]: Analyzing trace with hash -261542201, now seen corresponding path program 1 times [2023-11-19 04:58:42,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:42,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080631741] [2023-11-19 04:58:42,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:42,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:42,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:42,847 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-19 04:58:42,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:42,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080631741] [2023-11-19 04:58:42,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080631741] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:58:42,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559078240] [2023-11-19 04:58:42,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:42,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:42,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:42,852 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:58:42,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 04:58:42,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:42,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 04:58:43,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:58:43,122 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-19 04:58:43,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:58:43,329 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-19 04:58:43,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559078240] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 04:58:43,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 04:58:43,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 6] total 14 [2023-11-19 04:58:43,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571093740] [2023-11-19 04:58:43,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:43,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:58:43,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:43,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:58:43,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-11-19 04:58:43,333 INFO L87 Difference]: Start difference. First operand 2374 states and 4119 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-19 04:58:44,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:44,297 INFO L93 Difference]: Finished difference Result 3393 states and 5308 transitions. [2023-11-19 04:58:44,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 04:58:44,298 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 104 [2023-11-19 04:58:44,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:44,317 INFO L225 Difference]: With dead ends: 3393 [2023-11-19 04:58:44,318 INFO L226 Difference]: Without dead ends: 2500 [2023-11-19 04:58:44,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-11-19 04:58:44,321 INFO L413 NwaCegarLoop]: 3140 mSDtfsCounter, 63 mSDsluCounter, 6206 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 9346 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:44,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 9346 Invalid, 791 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [33 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 04:58:44,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2500 states. [2023-11-19 04:58:44,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2500 to 2442. [2023-11-19 04:58:44,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2442 states, 2202 states have (on average 1.7724795640326976) internal successors, (3903), 2213 states have internal predecessors, (3903), 141 states have call successors, (141), 93 states have call predecessors, (141), 97 states have return successors, (147), 136 states have call predecessors, (147), 141 states have call successors, (147) [2023-11-19 04:58:44,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2442 states to 2442 states and 4191 transitions. [2023-11-19 04:58:44,456 INFO L78 Accepts]: Start accepts. Automaton has 2442 states and 4191 transitions. Word has length 104 [2023-11-19 04:58:44,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:44,456 INFO L495 AbstractCegarLoop]: Abstraction has 2442 states and 4191 transitions. [2023-11-19 04:58:44,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-19 04:58:44,457 INFO L276 IsEmpty]: Start isEmpty. Operand 2442 states and 4191 transitions. [2023-11-19 04:58:44,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-11-19 04:58:44,460 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:44,461 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:58:44,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 04:58:44,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 04:58:44,675 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:44,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:44,676 INFO L85 PathProgramCache]: Analyzing trace with hash 428669273, now seen corresponding path program 1 times [2023-11-19 04:58:44,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:44,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906428338] [2023-11-19 04:58:44,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:44,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:44,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:45,029 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 64 proven. 39 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-11-19 04:58:45,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:45,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906428338] [2023-11-19 04:58:45,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906428338] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:58:45,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330363269] [2023-11-19 04:58:45,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:45,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:45,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:45,032 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:58:45,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d286486-412a-4a4b-a5ae-b9d4c923b259/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 04:58:45,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:45,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 04:58:45,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:58:45,284 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-19 04:58:45,284 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:58:45,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330363269] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:45,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:58:45,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 13 [2023-11-19 04:58:45,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326307283] [2023-11-19 04:58:45,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:45,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:58:45,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:45,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:58:45,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-11-19 04:58:45,288 INFO L87 Difference]: Start difference. First operand 2442 states and 4191 transitions. Second operand has 7 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19)