./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda1212e-c980-44cc-bb02-f5135c4fd2d4/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda1212e-c980-44cc-bb02-f5135c4fd2d4/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda1212e-c980-44cc-bb02-f5135c4fd2d4/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda1212e-c980-44cc-bb02-f5135c4fd2d4/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda1212e-c980-44cc-bb02-f5135c4fd2d4/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda1212e-c980-44cc-bb02-f5135c4fd2d4/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ccd7de77f49c6b9ff6e2bd62edbddc630c5186aa67a4c3123f05914f38eca6d7 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:17:10,420 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:17:10,491 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda1212e-c980-44cc-bb02-f5135c4fd2d4/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:17:10,497 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:17:10,498 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:17:10,526 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:17:10,527 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:17:10,528 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:17:10,531 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:17:10,533 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:17:10,534 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:17:10,536 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:17:10,536 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:17:10,539 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:17:10,539 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:17:10,540 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:17:10,541 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:17:10,544 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:17:10,545 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:17:10,547 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:17:10,547 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:17:10,548 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:17:10,548 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:17:10,549 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:17:10,550 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:17:10,550 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:17:10,551 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:17:10,551 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:17:10,551 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:17:10,552 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:17:10,553 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:17:10,554 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:17:10,554 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:17:10,554 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:17:10,554 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:17:10,555 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:17:10,555 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:17:10,555 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:17:10,555 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:17:10,556 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:17:10,556 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:17:10,556 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:17:10,557 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:17:10,557 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:17:10,557 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:17:10,558 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:17:10,558 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:17:10,558 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_fda1212e-c980-44cc-bb02-f5135c4fd2d4/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda1212e-c980-44cc-bb02-f5135c4fd2d4/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ccd7de77f49c6b9ff6e2bd62edbddc630c5186aa67a4c3123f05914f38eca6d7 [2023-11-23 21:17:10,843 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:17:10,873 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:17:10,876 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:17:10,879 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:17:10,879 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:17:10,881 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda1212e-c980-44cc-bb02-f5135c4fd2d4/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-11-23 21:17:13,990 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:17:14,278 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:17:14,278 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda1212e-c980-44cc-bb02-f5135c4fd2d4/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-11-23 21:17:14,297 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda1212e-c980-44cc-bb02-f5135c4fd2d4/bin/utaipan-verify-mE87zJ7Ire/data/3884911bf/2b6010e775ff412bbec3397ac5d7d513/FLAG65a6e027c [2023-11-23 21:17:14,311 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda1212e-c980-44cc-bb02-f5135c4fd2d4/bin/utaipan-verify-mE87zJ7Ire/data/3884911bf/2b6010e775ff412bbec3397ac5d7d513 [2023-11-23 21:17:14,322 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:17:14,325 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:17:14,326 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:17:14,326 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:17:14,331 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:17:14,332 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:17:14" (1/1) ... [2023-11-23 21:17:14,333 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35b025f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:14, skipping insertion in model container [2023-11-23 21:17:14,333 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:17:14" (1/1) ... [2023-11-23 21:17:14,408 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:17:14,600 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_fda1212e-c980-44cc-bb02-f5135c4fd2d4/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[5377,5390] [2023-11-23 21:17:14,631 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:17:14,649 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:17:14,690 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_fda1212e-c980-44cc-bb02-f5135c4fd2d4/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[5377,5390] [2023-11-23 21:17:14,712 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:17:14,733 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:17:14,733 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:14 WrapperNode [2023-11-23 21:17:14,733 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:17:14,734 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:17:14,735 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:17:14,735 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:17:14,743 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:14" (1/1) ... [2023-11-23 21:17:14,755 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:14" (1/1) ... [2023-11-23 21:17:14,807 INFO L138 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 444 [2023-11-23 21:17:14,807 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:17:14,808 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:17:14,808 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:17:14,808 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:17:14,818 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:14" (1/1) ... [2023-11-23 21:17:14,818 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:14" (1/1) ... [2023-11-23 21:17:14,822 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:14" (1/1) ... [2023-11-23 21:17:14,823 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:14" (1/1) ... [2023-11-23 21:17:14,832 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:14" (1/1) ... [2023-11-23 21:17:14,837 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:14" (1/1) ... [2023-11-23 21:17:14,840 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:14" (1/1) ... [2023-11-23 21:17:14,843 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:14" (1/1) ... [2023-11-23 21:17:14,848 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:17:14,849 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:17:14,849 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:17:14,850 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:17:14,850 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:14" (1/1) ... [2023-11-23 21:17:14,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:17:14,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda1212e-c980-44cc-bb02-f5135c4fd2d4/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:17:14,906 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda1212e-c980-44cc-bb02-f5135c4fd2d4/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:17:14,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda1212e-c980-44cc-bb02-f5135c4fd2d4/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:17:14,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:17:14,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:17:14,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:17:14,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:17:15,073 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:17:15,076 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:17:15,578 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:17:15,809 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:17:15,809 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 21:17:15,811 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:17:15 BoogieIcfgContainer [2023-11-23 21:17:15,811 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:17:15,814 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:17:15,814 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:17:15,817 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:17:15,818 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:17:14" (1/3) ... [2023-11-23 21:17:15,819 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14078912 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:17:15, skipping insertion in model container [2023-11-23 21:17:15,819 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:14" (2/3) ... [2023-11-23 21:17:15,820 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14078912 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:17:15, skipping insertion in model container [2023-11-23 21:17:15,820 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:17:15" (3/3) ... [2023-11-23 21:17:15,821 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-11-23 21:17:15,842 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:17:15,843 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:17:15,898 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:17:15,904 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;@16578dbd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:17:15,905 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:17:15,910 INFO L276 IsEmpty]: Start isEmpty. Operand has 79 states, 77 states have (on average 1.6753246753246753) internal successors, (129), 78 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:17:15,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-23 21:17:15,917 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:15,918 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:15,918 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:15,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:15,923 INFO L85 PathProgramCache]: Analyzing trace with hash 771077120, now seen corresponding path program 1 times [2023-11-23 21:17:15,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:15,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35586314] [2023-11-23 21:17:15,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:15,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:16,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:16,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:17:16,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:16,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35586314] [2023-11-23 21:17:16,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35586314] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:16,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:16,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:16,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203593187] [2023-11-23 21:17:16,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:16,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:17:16,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:16,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:17:16,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:16,562 INFO L87 Difference]: Start difference. First operand has 79 states, 77 states have (on average 1.6753246753246753) internal successors, (129), 78 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:17:16,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:16,686 INFO L93 Difference]: Finished difference Result 179 states and 276 transitions. [2023-11-23 21:17:16,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:17:16,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-11-23 21:17:16,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:16,702 INFO L225 Difference]: With dead ends: 179 [2023-11-23 21:17:16,703 INFO L226 Difference]: Without dead ends: 122 [2023-11-23 21:17:16,706 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 [2023-11-23 21:17:16,712 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 93 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:16,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 251 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:17:16,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-11-23 21:17:16,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2023-11-23 21:17:16,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.403361344537815) internal successors, (167), 119 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:17:16,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 167 transitions. [2023-11-23 21:17:16,779 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 167 transitions. Word has length 37 [2023-11-23 21:17:16,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:16,781 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 167 transitions. [2023-11-23 21:17:16,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:17:16,782 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 167 transitions. [2023-11-23 21:17:16,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-23 21:17:16,785 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:16,785 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:16,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:17:16,786 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:16,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:16,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1416792030, now seen corresponding path program 1 times [2023-11-23 21:17:16,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:16,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777883938] [2023-11-23 21:17:16,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:16,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:16,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:16,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:17:16,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:16,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777883938] [2023-11-23 21:17:16,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777883938] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:16,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:16,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:16,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381008815] [2023-11-23 21:17:16,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:16,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:17:16,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:16,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:17:16,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:16,937 INFO L87 Difference]: Start difference. First operand 120 states and 167 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:17:16,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:16,981 INFO L93 Difference]: Finished difference Result 286 states and 415 transitions. [2023-11-23 21:17:16,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:17:16,982 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-23 21:17:16,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:16,985 INFO L225 Difference]: With dead ends: 286 [2023-11-23 21:17:16,985 INFO L226 Difference]: Without dead ends: 192 [2023-11-23 21:17:16,991 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 [2023-11-23 21:17:16,994 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 69 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:16,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 198 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:17:16,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-11-23 21:17:17,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2023-11-23 21:17:17,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 1.433862433862434) internal successors, (271), 189 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:17:17,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 271 transitions. [2023-11-23 21:17:17,027 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 271 transitions. Word has length 39 [2023-11-23 21:17:17,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:17,028 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 271 transitions. [2023-11-23 21:17:17,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:17:17,030 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 271 transitions. [2023-11-23 21:17:17,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-23 21:17:17,035 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:17,035 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:17,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:17:17,036 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:17,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:17,037 INFO L85 PathProgramCache]: Analyzing trace with hash -274780282, now seen corresponding path program 1 times [2023-11-23 21:17:17,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:17,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507470281] [2023-11-23 21:17:17,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:17,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:17,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:17,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:17:17,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:17,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507470281] [2023-11-23 21:17:17,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507470281] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:17,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:17,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:17,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463672434] [2023-11-23 21:17:17,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:17,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:17:17,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:17,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:17:17,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:17,173 INFO L87 Difference]: Start difference. First operand 190 states and 271 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:17:17,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:17,223 INFO L93 Difference]: Finished difference Result 474 states and 693 transitions. [2023-11-23 21:17:17,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:17:17,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-11-23 21:17:17,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:17,230 INFO L225 Difference]: With dead ends: 474 [2023-11-23 21:17:17,230 INFO L226 Difference]: Without dead ends: 310 [2023-11-23 21:17:17,239 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 [2023-11-23 21:17:17,244 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 64 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:17,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 183 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:17:17,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2023-11-23 21:17:17,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 308. [2023-11-23 21:17:17,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.4429967426710097) internal successors, (443), 307 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:17:17,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 443 transitions. [2023-11-23 21:17:17,277 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 443 transitions. Word has length 42 [2023-11-23 21:17:17,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:17,283 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 443 transitions. [2023-11-23 21:17:17,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:17:17,284 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 443 transitions. [2023-11-23 21:17:17,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-23 21:17:17,286 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:17,286 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:17,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:17:17,287 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:17,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:17,288 INFO L85 PathProgramCache]: Analyzing trace with hash -780319843, now seen corresponding path program 1 times [2023-11-23 21:17:17,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:17,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742472252] [2023-11-23 21:17:17,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:17,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:17,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:17,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:17:17,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:17,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742472252] [2023-11-23 21:17:17,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742472252] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:17,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:17,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:17:17,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516778955] [2023-11-23 21:17:17,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:17,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:17:17,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:17,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:17:17,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:17:17,385 INFO L87 Difference]: Start difference. First operand 308 states and 443 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:17:17,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:17,426 INFO L93 Difference]: Finished difference Result 784 states and 1141 transitions. [2023-11-23 21:17:17,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:17:17,427 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2023-11-23 21:17:17,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:17,432 INFO L225 Difference]: With dead ends: 784 [2023-11-23 21:17:17,433 INFO L226 Difference]: Without dead ends: 502 [2023-11-23 21:17:17,435 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 [2023-11-23 21:17:17,443 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 59 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:17,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 168 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:17:17,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2023-11-23 21:17:17,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 500. [2023-11-23 21:17:17,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 1.4328657314629258) internal successors, (715), 499 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:17:17,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 715 transitions. [2023-11-23 21:17:17,478 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 715 transitions. Word has length 45 [2023-11-23 21:17:17,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:17,479 INFO L495 AbstractCegarLoop]: Abstraction has 500 states and 715 transitions. [2023-11-23 21:17:17,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:17:17,480 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 715 transitions. [2023-11-23 21:17:17,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-23 21:17:17,481 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:17,482 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:17,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:17:17,482 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:17,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:17,483 INFO L85 PathProgramCache]: Analyzing trace with hash 983886012, now seen corresponding path program 1 times [2023-11-23 21:17:17,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:17,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226443058] [2023-11-23 21:17:17,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:17,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:17,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:17,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:17:17,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:17,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226443058] [2023-11-23 21:17:17,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226443058] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:17,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:17,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:17:17,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375105189] [2023-11-23 21:17:17,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:17,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:17:17,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:17,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:17:17,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:17:17,743 INFO L87 Difference]: Start difference. First operand 500 states and 715 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:17:17,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:17,877 INFO L93 Difference]: Finished difference Result 2084 states and 2991 transitions. [2023-11-23 21:17:17,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:17:17,878 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2023-11-23 21:17:17,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:17,887 INFO L225 Difference]: With dead ends: 2084 [2023-11-23 21:17:17,888 INFO L226 Difference]: Without dead ends: 1610 [2023-11-23 21:17:17,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:17:17,890 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 291 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:17,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 454 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:17:17,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2023-11-23 21:17:17,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 1604. [2023-11-23 21:17:17,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1603 states have (on average 1.429195258889582) internal successors, (2291), 1603 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:17:17,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 2291 transitions. [2023-11-23 21:17:17,937 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 2291 transitions. Word has length 48 [2023-11-23 21:17:17,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:17,937 INFO L495 AbstractCegarLoop]: Abstraction has 1604 states and 2291 transitions. [2023-11-23 21:17:17,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:17:17,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 2291 transitions. [2023-11-23 21:17:17,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-23 21:17:17,939 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:17,940 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:17,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:17:17,940 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:17,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:17,941 INFO L85 PathProgramCache]: Analyzing trace with hash 968975155, now seen corresponding path program 1 times [2023-11-23 21:17:17,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:17,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144131460] [2023-11-23 21:17:17,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:17,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:17,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:18,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:17:18,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:18,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144131460] [2023-11-23 21:17:18,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144131460] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:18,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:18,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:17:18,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630663033] [2023-11-23 21:17:18,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:18,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:17:18,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:18,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:17:18,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:17:18,052 INFO L87 Difference]: Start difference. First operand 1604 states and 2291 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:17:18,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:18,224 INFO L93 Difference]: Finished difference Result 4125 states and 5937 transitions. [2023-11-23 21:17:18,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:17:18,229 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2023-11-23 21:17:18,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:18,244 INFO L225 Difference]: With dead ends: 4125 [2023-11-23 21:17:18,244 INFO L226 Difference]: Without dead ends: 2547 [2023-11-23 21:17:18,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:17:18,251 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 398 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:18,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [398 Valid, 108 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:17:18,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2547 states. [2023-11-23 21:17:18,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2547 to 2545. [2023-11-23 21:17:18,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2545 states, 2544 states have (on average 1.4241352201257862) internal successors, (3623), 2544 states have internal predecessors, (3623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:17:18,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2545 states to 2545 states and 3623 transitions. [2023-11-23 21:17:18,330 INFO L78 Accepts]: Start accepts. Automaton has 2545 states and 3623 transitions. Word has length 50 [2023-11-23 21:17:18,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:18,330 INFO L495 AbstractCegarLoop]: Abstraction has 2545 states and 3623 transitions. [2023-11-23 21:17:18,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:17:18,331 INFO L276 IsEmpty]: Start isEmpty. Operand 2545 states and 3623 transitions. [2023-11-23 21:17:18,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-23 21:17:18,332 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:18,332 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:18,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:17:18,333 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:18,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:18,333 INFO L85 PathProgramCache]: Analyzing trace with hash 345124398, now seen corresponding path program 1 times [2023-11-23 21:17:18,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:18,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059379373] [2023-11-23 21:17:18,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:18,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:18,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:18,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:17:18,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:18,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059379373] [2023-11-23 21:17:18,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059379373] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:18,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:18,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-23 21:17:18,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963863692] [2023-11-23 21:17:18,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:18,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 21:17:18,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:17:18,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 21:17:18,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:17:18,839 INFO L87 Difference]: Start difference. First operand 2545 states and 3623 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:17:19,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:19,232 INFO L93 Difference]: Finished difference Result 5460 states and 7845 transitions. [2023-11-23 21:17:19,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-23 21:17:19,233 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2023-11-23 21:17:19,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:19,265 INFO L225 Difference]: With dead ends: 5460 [2023-11-23 21:17:19,265 INFO L226 Difference]: Without dead ends: 5458 [2023-11-23 21:17:19,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2023-11-23 21:17:19,269 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 650 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 1382 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:19,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [650 Valid, 1382 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:17:19,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5458 states. [2023-11-23 21:17:19,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5458 to 2761. [2023-11-23 21:17:19,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2761 states, 2760 states have (on average 1.4246376811594204) internal successors, (3932), 2760 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:17:19,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2761 states to 2761 states and 3932 transitions. [2023-11-23 21:17:19,409 INFO L78 Accepts]: Start accepts. Automaton has 2761 states and 3932 transitions. Word has length 50 [2023-11-23 21:17:19,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:19,410 INFO L495 AbstractCegarLoop]: Abstraction has 2761 states and 3932 transitions. [2023-11-23 21:17:19,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:17:19,411 INFO L276 IsEmpty]: Start isEmpty. Operand 2761 states and 3932 transitions. [2023-11-23 21:17:19,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-23 21:17:19,413 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:19,413 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 21:17:19,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:17:19,414 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:19,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:19,415 INFO L85 PathProgramCache]: Analyzing trace with hash -44440818, now seen corresponding path program 1 times [2023-11-23 21:17:19,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:19,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228220373] [2023-11-23 21:17:19,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:19,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:19,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:20,874 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:17:20,875 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:17:20,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228220373] [2023-11-23 21:17:20,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228220373] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:17:20,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199429106] [2023-11-23 21:17:20,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:20,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:17:20,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda1212e-c980-44cc-bb02-f5135c4fd2d4/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:17:20,878 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda1212e-c980-44cc-bb02-f5135c4fd2d4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:17:20,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fda1212e-c980-44cc-bb02-f5135c4fd2d4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:17:21,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:21,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-23 21:17:21,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:17:23,496 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:17:23,497 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:17:35,435 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:17:35,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199429106] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:17:35,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1168173410] [2023-11-23 21:17:35,458 INFO L159 IcfgInterpreter]: Started Sifa with 51 locations of interest [2023-11-23 21:17:35,458 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:17:35,462 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:17:35,468 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:17:35,468 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:17:46,701 INFO L180 IcfgInterpreter]: Interpretation finished