./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label09.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_2c2199af-834a-4c9c-ab1d-2bd2b9c3c127/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c2199af-834a-4c9c-ab1d-2bd2b9c3c127/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c2199af-834a-4c9c-ab1d-2bd2b9c3c127/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c2199af-834a-4c9c-ab1d-2bd2b9c3c127/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label09.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c2199af-834a-4c9c-ab1d-2bd2b9c3c127/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c2199af-834a-4c9c-ab1d-2bd2b9c3c127/bin/utaipan-verify-NcY6lQBIFX --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 759500fc885fd8551afb1744440c02e812929b084934756d49ccfd6e6b033437 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:49:18,578 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:49:18,724 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c2199af-834a-4c9c-ab1d-2bd2b9c3c127/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:49:18,729 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:49:18,730 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:49:18,762 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:49:18,763 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:49:18,764 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:49:18,766 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:49:18,771 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:49:18,772 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:49:18,773 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:49:18,774 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:49:18,776 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:49:18,776 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:49:18,777 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:49:18,778 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:49:18,778 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:49:18,779 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:49:18,779 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:49:18,780 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:49:18,781 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:49:18,782 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:49:18,783 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:49:18,784 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:49:18,784 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:49:18,785 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:49:18,786 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:49:18,786 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:49:18,787 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:49:18,788 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:49:18,789 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:49:18,789 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:49:18,790 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:49:18,790 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:49:18,791 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:49:18,792 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:49:18,792 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:49:18,793 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:49:18,793 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:49:18,794 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:49:18,794 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:49:18,795 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:49:18,795 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:49:18,796 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:49:18,796 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_2c2199af-834a-4c9c-ab1d-2bd2b9c3c127/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c2199af-834a-4c9c-ab1d-2bd2b9c3c127/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 759500fc885fd8551afb1744440c02e812929b084934756d49ccfd6e6b033437 [2023-11-12 00:49:19,174 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:49:19,207 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:49:19,210 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:49:19,212 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:49:19,213 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:49:19,216 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c2199af-834a-4c9c-ab1d-2bd2b9c3c127/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/eca-rers2012/Problem03_label09.c [2023-11-12 00:49:22,545 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:49:23,007 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:49:23,008 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c2199af-834a-4c9c-ab1d-2bd2b9c3c127/sv-benchmarks/c/eca-rers2012/Problem03_label09.c [2023-11-12 00:49:23,033 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c2199af-834a-4c9c-ab1d-2bd2b9c3c127/bin/utaipan-verify-NcY6lQBIFX/data/cb5352868/75182fe5322e4805b95cfbc32dfe1607/FLAG28d09a3c5 [2023-11-12 00:49:23,052 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c2199af-834a-4c9c-ab1d-2bd2b9c3c127/bin/utaipan-verify-NcY6lQBIFX/data/cb5352868/75182fe5322e4805b95cfbc32dfe1607 [2023-11-12 00:49:23,055 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:49:23,057 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:49:23,058 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:49:23,059 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:49:23,065 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:49:23,069 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:49:23" (1/1) ... [2023-11-12 00:49:23,071 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73059b3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:23, skipping insertion in model container [2023-11-12 00:49:23,072 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:49:23" (1/1) ... [2023-11-12 00:49:23,185 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:49:24,076 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_2c2199af-834a-4c9c-ab1d-2bd2b9c3c127/sv-benchmarks/c/eca-rers2012/Problem03_label09.c[54191,54204] [2023-11-12 00:49:24,136 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:49:24,158 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:49:24,508 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_2c2199af-834a-4c9c-ab1d-2bd2b9c3c127/sv-benchmarks/c/eca-rers2012/Problem03_label09.c[54191,54204] [2023-11-12 00:49:24,532 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:49:24,558 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:49:24,558 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:24 WrapperNode [2023-11-12 00:49:24,559 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:49:24,561 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:49:24,561 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:49:24,561 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:49:24,570 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:24" (1/1) ... [2023-11-12 00:49:24,627 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:24" (1/1) ... [2023-11-12 00:49:24,741 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1772 [2023-11-12 00:49:24,741 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:49:24,742 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:49:24,742 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:49:24,742 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:49:24,752 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:24" (1/1) ... [2023-11-12 00:49:24,753 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:24" (1/1) ... [2023-11-12 00:49:24,763 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:24" (1/1) ... [2023-11-12 00:49:24,763 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:24" (1/1) ... [2023-11-12 00:49:24,817 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:24" (1/1) ... [2023-11-12 00:49:24,840 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:24" (1/1) ... [2023-11-12 00:49:24,859 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:24" (1/1) ... [2023-11-12 00:49:24,869 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:24" (1/1) ... [2023-11-12 00:49:24,884 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:49:24,886 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:49:24,887 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:49:24,887 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:49:24,888 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:24" (1/1) ... [2023-11-12 00:49:24,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:49:24,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c2199af-834a-4c9c-ab1d-2bd2b9c3c127/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:49:24,927 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c2199af-834a-4c9c-ab1d-2bd2b9c3c127/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:49:24,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c2199af-834a-4c9c-ab1d-2bd2b9c3c127/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:49:24,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:49:24,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:49:24,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:49:24,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:49:25,061 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:49:25,064 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:49:27,270 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:49:27,770 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:49:27,770 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 00:49:27,773 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:49:27 BoogieIcfgContainer [2023-11-12 00:49:27,774 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:49:27,776 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:49:27,776 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:49:27,780 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:49:27,781 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:49:23" (1/3) ... [2023-11-12 00:49:27,782 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f6b7be1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:49:27, skipping insertion in model container [2023-11-12 00:49:27,782 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:24" (2/3) ... [2023-11-12 00:49:27,782 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f6b7be1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:49:27, skipping insertion in model container [2023-11-12 00:49:27,783 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:49:27" (3/3) ... [2023-11-12 00:49:27,784 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label09.c [2023-11-12 00:49:27,809 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:49:27,809 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:49:27,891 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:49:27,900 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;@6dfa3c59, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:49:27,902 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:49:27,909 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 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) [2023-11-12 00:49:27,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-11-12 00:49:27,933 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:27,935 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:27,936 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:27,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:27,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1724868360, now seen corresponding path program 1 times [2023-11-12 00:49:27,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:27,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904298218] [2023-11-12 00:49:27,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:27,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:28,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:29,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:49:29,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:29,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904298218] [2023-11-12 00:49:29,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904298218] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:29,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:49:29,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:49:29,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106424057] [2023-11-12 00:49:29,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:29,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:49:29,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:29,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:49:29,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:49:29,324 INFO L87 Difference]: Start difference. First operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 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 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 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) [2023-11-12 00:49:30,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:30,749 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2023-11-12 00:49:30,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:49:30,752 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 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 143 [2023-11-12 00:49:30,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:30,768 INFO L225 Difference]: With dead ends: 440 [2023-11-12 00:49:30,769 INFO L226 Difference]: Without dead ends: 289 [2023-11-12 00:49:30,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:49:30,777 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 10 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:30,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 30 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-12 00:49:30,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2023-11-12 00:49:30,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2023-11-12 00:49:30,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.8923611111111112) internal successors, (545), 288 states have internal predecessors, (545), 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) [2023-11-12 00:49:30,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 545 transitions. [2023-11-12 00:49:30,880 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 545 transitions. Word has length 143 [2023-11-12 00:49:30,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:30,885 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 545 transitions. [2023-11-12 00:49:30,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 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) [2023-11-12 00:49:30,886 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 545 transitions. [2023-11-12 00:49:30,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-11-12 00:49:30,901 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:30,902 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:30,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:49:30,903 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:30,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:30,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1067661148, now seen corresponding path program 1 times [2023-11-12 00:49:30,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:30,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150025751] [2023-11-12 00:49:30,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:30,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:31,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:31,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:49:31,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:31,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150025751] [2023-11-12 00:49:31,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150025751] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:31,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:49:31,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:49:31,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389873184] [2023-11-12 00:49:31,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:31,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:49:31,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:31,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:49:31,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:49:31,357 INFO L87 Difference]: Start difference. First operand 289 states and 545 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 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) [2023-11-12 00:49:32,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:32,321 INFO L93 Difference]: Finished difference Result 863 states and 1632 transitions. [2023-11-12 00:49:32,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:49:32,323 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 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 149 [2023-11-12 00:49:32,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:32,331 INFO L225 Difference]: With dead ends: 863 [2023-11-12 00:49:32,331 INFO L226 Difference]: Without dead ends: 575 [2023-11-12 00:49:32,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:49:32,335 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 150 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:32,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 97 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 00:49:32,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2023-11-12 00:49:32,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2023-11-12 00:49:32,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.5592334494773519) internal successors, (895), 574 states have internal predecessors, (895), 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) [2023-11-12 00:49:32,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 895 transitions. [2023-11-12 00:49:32,398 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 895 transitions. Word has length 149 [2023-11-12 00:49:32,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:32,398 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 895 transitions. [2023-11-12 00:49:32,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 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) [2023-11-12 00:49:32,399 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 895 transitions. [2023-11-12 00:49:32,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-11-12 00:49:32,402 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:32,403 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:32,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:49:32,404 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:32,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:32,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1008637883, now seen corresponding path program 1 times [2023-11-12 00:49:32,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:32,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513331704] [2023-11-12 00:49:32,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:32,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:32,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:32,698 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 00:49:32,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:32,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513331704] [2023-11-12 00:49:32,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513331704] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:32,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:49:32,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:49:32,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946605696] [2023-11-12 00:49:32,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:32,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:49:32,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:32,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:49:32,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:49:32,703 INFO L87 Difference]: Start difference. First operand 575 states and 895 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 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) [2023-11-12 00:49:33,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:33,718 INFO L93 Difference]: Finished difference Result 1721 states and 2682 transitions. [2023-11-12 00:49:33,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:49:33,719 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 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 157 [2023-11-12 00:49:33,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:33,726 INFO L225 Difference]: With dead ends: 1721 [2023-11-12 00:49:33,727 INFO L226 Difference]: Without dead ends: 1147 [2023-11-12 00:49:33,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:49:33,730 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 157 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:33,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 25 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 00:49:33,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2023-11-12 00:49:33,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1147. [2023-11-12 00:49:33,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.5235602094240839) internal successors, (1746), 1146 states have internal predecessors, (1746), 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) [2023-11-12 00:49:33,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1746 transitions. [2023-11-12 00:49:33,766 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1746 transitions. Word has length 157 [2023-11-12 00:49:33,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:33,766 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1746 transitions. [2023-11-12 00:49:33,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 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) [2023-11-12 00:49:33,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1746 transitions. [2023-11-12 00:49:33,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-11-12 00:49:33,772 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:33,772 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:33,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:49:33,773 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:33,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:33,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1359918154, now seen corresponding path program 1 times [2023-11-12 00:49:33,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:33,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411682450] [2023-11-12 00:49:33,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:33,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:33,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:34,022 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 00:49:34,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:34,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411682450] [2023-11-12 00:49:34,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411682450] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:34,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:49:34,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:49:34,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918004178] [2023-11-12 00:49:34,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:34,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:49:34,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:34,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:49:34,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:49:34,027 INFO L87 Difference]: Start difference. First operand 1147 states and 1746 transitions. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 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) [2023-11-12 00:49:34,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:34,565 INFO L93 Difference]: Finished difference Result 3439 states and 5236 transitions. [2023-11-12 00:49:34,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:49:34,566 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 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) Word has length 172 [2023-11-12 00:49:34,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:34,579 INFO L225 Difference]: With dead ends: 3439 [2023-11-12 00:49:34,579 INFO L226 Difference]: Without dead ends: 2293 [2023-11-12 00:49:34,581 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 [2023-11-12 00:49:34,583 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 244 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:34,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 318 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:49:34,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2023-11-12 00:49:34,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 2291. [2023-11-12 00:49:34,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 1.520524017467249) internal successors, (3482), 2290 states have internal predecessors, (3482), 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) [2023-11-12 00:49:34,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 3482 transitions. [2023-11-12 00:49:34,674 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 3482 transitions. Word has length 172 [2023-11-12 00:49:34,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:34,674 INFO L495 AbstractCegarLoop]: Abstraction has 2291 states and 3482 transitions. [2023-11-12 00:49:34,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 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) [2023-11-12 00:49:34,676 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 3482 transitions. [2023-11-12 00:49:34,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-11-12 00:49:34,685 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:34,685 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:34,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:49:34,686 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:34,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:34,693 INFO L85 PathProgramCache]: Analyzing trace with hash 574997053, now seen corresponding path program 1 times [2023-11-12 00:49:34,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:34,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112878058] [2023-11-12 00:49:34,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:34,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:34,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:35,233 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 00:49:35,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:35,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112878058] [2023-11-12 00:49:35,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112878058] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:35,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:49:35,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:49:35,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631702700] [2023-11-12 00:49:35,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:35,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:49:35,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:35,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:49:35,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:49:35,239 INFO L87 Difference]: Start difference. First operand 2291 states and 3482 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 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) [2023-11-12 00:49:36,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:36,304 INFO L93 Difference]: Finished difference Result 5582 states and 8495 transitions. [2023-11-12 00:49:36,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:49:36,305 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 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 176 [2023-11-12 00:49:36,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:36,327 INFO L225 Difference]: With dead ends: 5582 [2023-11-12 00:49:36,327 INFO L226 Difference]: Without dead ends: 3292 [2023-11-12 00:49:36,330 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 [2023-11-12 00:49:36,332 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 133 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:36,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 224 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 00:49:36,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3292 states. [2023-11-12 00:49:36,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3292 to 3292. [2023-11-12 00:49:36,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3292 states, 3291 states have (on average 1.450015192950471) internal successors, (4772), 3291 states have internal predecessors, (4772), 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) [2023-11-12 00:49:36,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3292 states to 3292 states and 4772 transitions. [2023-11-12 00:49:36,432 INFO L78 Accepts]: Start accepts. Automaton has 3292 states and 4772 transitions. Word has length 176 [2023-11-12 00:49:36,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:36,433 INFO L495 AbstractCegarLoop]: Abstraction has 3292 states and 4772 transitions. [2023-11-12 00:49:36,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 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) [2023-11-12 00:49:36,433 INFO L276 IsEmpty]: Start isEmpty. Operand 3292 states and 4772 transitions. [2023-11-12 00:49:36,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-11-12 00:49:36,444 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:36,445 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:36,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 00:49:36,445 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:36,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:36,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1793518977, now seen corresponding path program 1 times [2023-11-12 00:49:36,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:36,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81224645] [2023-11-12 00:49:36,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:36,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:36,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:37,011 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-12 00:49:37,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:37,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81224645] [2023-11-12 00:49:37,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81224645] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:37,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:49:37,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:49:37,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158568213] [2023-11-12 00:49:37,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:37,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:49:37,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:37,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:49:37,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:49:37,018 INFO L87 Difference]: Start difference. First operand 3292 states and 4772 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 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) [2023-11-12 00:49:38,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:38,274 INFO L93 Difference]: Finished difference Result 8299 states and 12479 transitions. [2023-11-12 00:49:38,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:49:38,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 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 181 [2023-11-12 00:49:38,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:38,311 INFO L225 Difference]: With dead ends: 8299 [2023-11-12 00:49:38,311 INFO L226 Difference]: Without dead ends: 5008 [2023-11-12 00:49:38,317 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 [2023-11-12 00:49:38,319 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 152 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:38,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 261 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-12 00:49:38,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5008 states. [2023-11-12 00:49:38,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5008 to 5008. [2023-11-12 00:49:38,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5008 states, 5007 states have (on average 1.3752746155382465) internal successors, (6886), 5007 states have internal predecessors, (6886), 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) [2023-11-12 00:49:38,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5008 states to 5008 states and 6886 transitions. [2023-11-12 00:49:38,517 INFO L78 Accepts]: Start accepts. Automaton has 5008 states and 6886 transitions. Word has length 181 [2023-11-12 00:49:38,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:38,518 INFO L495 AbstractCegarLoop]: Abstraction has 5008 states and 6886 transitions. [2023-11-12 00:49:38,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 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) [2023-11-12 00:49:38,519 INFO L276 IsEmpty]: Start isEmpty. Operand 5008 states and 6886 transitions. [2023-11-12 00:49:38,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2023-11-12 00:49:38,534 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:38,534 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:38,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 00:49:38,535 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:38,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:38,535 INFO L85 PathProgramCache]: Analyzing trace with hash -364881939, now seen corresponding path program 1 times [2023-11-12 00:49:38,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:38,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384624960] [2023-11-12 00:49:38,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:38,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:38,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:39,136 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-12 00:49:39,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:39,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384624960] [2023-11-12 00:49:39,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384624960] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:39,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:49:39,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:49:39,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675383750] [2023-11-12 00:49:39,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:39,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:49:39,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:39,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:49:39,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:49:39,141 INFO L87 Difference]: Start difference. First operand 5008 states and 6886 transitions. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 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) [2023-11-12 00:49:40,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:40,238 INFO L93 Difference]: Finished difference Result 13161 states and 17989 transitions. [2023-11-12 00:49:40,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:49:40,239 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 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) Word has length 189 [2023-11-12 00:49:40,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:40,292 INFO L225 Difference]: With dead ends: 13161 [2023-11-12 00:49:40,292 INFO L226 Difference]: Without dead ends: 8154 [2023-11-12 00:49:40,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:49:40,302 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 132 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:40,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 263 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 00:49:40,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8154 states. [2023-11-12 00:49:40,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8154 to 8154. [2023-11-12 00:49:40,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8154 states, 8153 states have (on average 1.2974365264319883) internal successors, (10578), 8153 states have internal predecessors, (10578), 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) [2023-11-12 00:49:40,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8154 states to 8154 states and 10578 transitions. [2023-11-12 00:49:40,565 INFO L78 Accepts]: Start accepts. Automaton has 8154 states and 10578 transitions. Word has length 189 [2023-11-12 00:49:40,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:40,566 INFO L495 AbstractCegarLoop]: Abstraction has 8154 states and 10578 transitions. [2023-11-12 00:49:40,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 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) [2023-11-12 00:49:40,567 INFO L276 IsEmpty]: Start isEmpty. Operand 8154 states and 10578 transitions. [2023-11-12 00:49:40,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2023-11-12 00:49:40,586 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:40,586 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:40,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 00:49:40,587 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:40,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:40,587 INFO L85 PathProgramCache]: Analyzing trace with hash -756269279, now seen corresponding path program 1 times [2023-11-12 00:49:40,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:40,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627932118] [2023-11-12 00:49:40,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:40,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:40,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:41,147 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-12 00:49:41,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:41,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627932118] [2023-11-12 00:49:41,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627932118] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:41,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:49:41,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:49:41,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994181044] [2023-11-12 00:49:41,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:41,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:49:41,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:41,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:49:41,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:49:41,153 INFO L87 Difference]: Start difference. First operand 8154 states and 10578 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 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) [2023-11-12 00:49:42,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:42,341 INFO L93 Difference]: Finished difference Result 22456 states and 29362 transitions. [2023-11-12 00:49:42,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:49:42,342 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 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 189 [2023-11-12 00:49:42,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:42,414 INFO L225 Difference]: With dead ends: 22456 [2023-11-12 00:49:42,415 INFO L226 Difference]: Without dead ends: 14303 [2023-11-12 00:49:42,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:49:42,477 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 135 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:42,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 95 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 00:49:42,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14303 states. [2023-11-12 00:49:42,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14303 to 13159. [2023-11-12 00:49:42,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13159 states, 13158 states have (on average 1.2967016263869888) internal successors, (17062), 13158 states have internal predecessors, (17062), 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) [2023-11-12 00:49:42,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13159 states to 13159 states and 17062 transitions. [2023-11-12 00:49:42,820 INFO L78 Accepts]: Start accepts. Automaton has 13159 states and 17062 transitions. Word has length 189 [2023-11-12 00:49:42,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:42,821 INFO L495 AbstractCegarLoop]: Abstraction has 13159 states and 17062 transitions. [2023-11-12 00:49:42,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 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) [2023-11-12 00:49:42,822 INFO L276 IsEmpty]: Start isEmpty. Operand 13159 states and 17062 transitions. [2023-11-12 00:49:42,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2023-11-12 00:49:42,845 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:42,846 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:42,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 00:49:42,849 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:42,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:42,850 INFO L85 PathProgramCache]: Analyzing trace with hash 719948418, now seen corresponding path program 1 times [2023-11-12 00:49:42,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:42,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16290332] [2023-11-12 00:49:42,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:42,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:42,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:43,327 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:49:43,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:43,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16290332] [2023-11-12 00:49:43,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16290332] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:43,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:49:43,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:49:43,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929273291] [2023-11-12 00:49:43,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:43,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:49:43,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:43,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:49:43,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:49:43,332 INFO L87 Difference]: Start difference. First operand 13159 states and 17062 transitions. Second operand has 4 states, 4 states have (on average 48.0) internal successors, (192), 3 states have internal predecessors, (192), 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) [2023-11-12 00:49:45,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:45,285 INFO L93 Difference]: Finished difference Result 28891 states and 37600 transitions. [2023-11-12 00:49:45,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:49:45,286 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.0) internal successors, (192), 3 states have internal predecessors, (192), 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 192 [2023-11-12 00:49:45,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:45,324 INFO L225 Difference]: With dead ends: 28891 [2023-11-12 00:49:45,324 INFO L226 Difference]: Without dead ends: 15733 [2023-11-12 00:49:45,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:49:45,346 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 243 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 1010 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 1010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:45,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 108 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 1010 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-12 00:49:45,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15733 states. [2023-11-12 00:49:45,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15733 to 12873. [2023-11-12 00:49:45,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12873 states, 12872 states have (on average 1.2967681789931635) internal successors, (16692), 12872 states have internal predecessors, (16692), 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) [2023-11-12 00:49:45,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12873 states to 12873 states and 16692 transitions. [2023-11-12 00:49:45,795 INFO L78 Accepts]: Start accepts. Automaton has 12873 states and 16692 transitions. Word has length 192 [2023-11-12 00:49:45,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:45,796 INFO L495 AbstractCegarLoop]: Abstraction has 12873 states and 16692 transitions. [2023-11-12 00:49:45,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.0) internal successors, (192), 3 states have internal predecessors, (192), 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) [2023-11-12 00:49:45,797 INFO L276 IsEmpty]: Start isEmpty. Operand 12873 states and 16692 transitions. [2023-11-12 00:49:45,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-11-12 00:49:45,823 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:45,825 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:45,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 00:49:45,825 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:45,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:45,832 INFO L85 PathProgramCache]: Analyzing trace with hash 181280255, now seen corresponding path program 1 times [2023-11-12 00:49:45,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:45,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467905043] [2023-11-12 00:49:45,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:45,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:45,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:46,424 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 61 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-12 00:49:46,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:46,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467905043] [2023-11-12 00:49:46,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467905043] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:49:46,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98386394] [2023-11-12 00:49:46,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:46,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:46,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c2199af-834a-4c9c-ab1d-2bd2b9c3c127/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:49:46,432 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c2199af-834a-4c9c-ab1d-2bd2b9c3c127/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:49:46,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c2199af-834a-4c9c-ab1d-2bd2b9c3c127/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:49:46,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:46,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:49:46,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:49:46,818 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-12 00:49:46,819 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:49:46,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98386394] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:46,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:49:46,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-11-12 00:49:46,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655001869] [2023-11-12 00:49:46,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:46,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:49:46,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:46,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:49:46,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:49:46,823 INFO L87 Difference]: Start difference. First operand 12873 states and 16692 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 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) [2023-11-12 00:49:47,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:47,517 INFO L93 Difference]: Finished difference Result 25316 states and 32821 transitions. [2023-11-12 00:49:47,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:49:47,518 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 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 199 [2023-11-12 00:49:47,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:47,547 INFO L225 Difference]: With dead ends: 25316 [2023-11-12 00:49:47,548 INFO L226 Difference]: Without dead ends: 12444 [2023-11-12 00:49:47,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:49:47,563 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 227 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:47,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 4 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 00:49:47,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12444 states. [2023-11-12 00:49:47,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12444 to 12444. [2023-11-12 00:49:47,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12444 states, 12443 states have (on average 1.2540384151731898) internal successors, (15604), 12443 states have internal predecessors, (15604), 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) [2023-11-12 00:49:47,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12444 states to 12444 states and 15604 transitions. [2023-11-12 00:49:47,966 INFO L78 Accepts]: Start accepts. Automaton has 12444 states and 15604 transitions. Word has length 199 [2023-11-12 00:49:47,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:47,969 INFO L495 AbstractCegarLoop]: Abstraction has 12444 states and 15604 transitions. [2023-11-12 00:49:47,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 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) [2023-11-12 00:49:47,970 INFO L276 IsEmpty]: Start isEmpty. Operand 12444 states and 15604 transitions. [2023-11-12 00:49:47,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2023-11-12 00:49:47,991 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:47,992 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:48,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c2199af-834a-4c9c-ab1d-2bd2b9c3c127/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:49:48,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c2199af-834a-4c9c-ab1d-2bd2b9c3c127/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:48,200 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:48,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:48,201 INFO L85 PathProgramCache]: Analyzing trace with hash 921522493, now seen corresponding path program 1 times [2023-11-12 00:49:48,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:48,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195527994] [2023-11-12 00:49:48,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:48,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:48,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:48,866 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 73 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-12 00:49:48,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:48,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195527994] [2023-11-12 00:49:48,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195527994] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:49:48,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598998963] [2023-11-12 00:49:48,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:48,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:48,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c2199af-834a-4c9c-ab1d-2bd2b9c3c127/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:49:48,869 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c2199af-834a-4c9c-ab1d-2bd2b9c3c127/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:49:48,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c2199af-834a-4c9c-ab1d-2bd2b9c3c127/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:49:49,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:49,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:49:49,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:49:49,543 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-12 00:49:49,543 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:49:49,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598998963] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:49,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:49:49,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-12 00:49:49,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121339195] [2023-11-12 00:49:49,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:49,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:49:49,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:49,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:49:49,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:49:49,546 INFO L87 Difference]: Start difference. First operand 12444 states and 15604 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 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) [2023-11-12 00:49:50,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:50,727 INFO L93 Difference]: Finished difference Result 34897 states and 43864 transitions. [2023-11-12 00:49:50,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:49:50,728 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 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 211 [2023-11-12 00:49:50,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:50,795 INFO L225 Difference]: With dead ends: 34897 [2023-11-12 00:49:50,796 INFO L226 Difference]: Without dead ends: 22454 [2023-11-12 00:49:50,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:49:50,814 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 32 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:50,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 77 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 00:49:50,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22454 states. [2023-11-12 00:49:51,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22454 to 22454. [2023-11-12 00:49:51,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22454 states, 22453 states have (on average 1.2264730770943748) internal successors, (27538), 22453 states have internal predecessors, (27538), 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) [2023-11-12 00:49:51,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22454 states to 22454 states and 27538 transitions. [2023-11-12 00:49:51,263 INFO L78 Accepts]: Start accepts. Automaton has 22454 states and 27538 transitions. Word has length 211 [2023-11-12 00:49:51,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:51,264 INFO L495 AbstractCegarLoop]: Abstraction has 22454 states and 27538 transitions. [2023-11-12 00:49:51,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 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) [2023-11-12 00:49:51,265 INFO L276 IsEmpty]: Start isEmpty. Operand 22454 states and 27538 transitions. [2023-11-12 00:49:51,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2023-11-12 00:49:51,291 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:51,291 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:51,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c2199af-834a-4c9c-ab1d-2bd2b9c3c127/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:49:51,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c2199af-834a-4c9c-ab1d-2bd2b9c3c127/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:51,499 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:51,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:51,500 INFO L85 PathProgramCache]: Analyzing trace with hash -341947182, now seen corresponding path program 1 times [2023-11-12 00:49:51,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:51,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190506175] [2023-11-12 00:49:51,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:51,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:51,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:52,266 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 00:49:52,267 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:52,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190506175] [2023-11-12 00:49:52,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190506175] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:52,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:49:52,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:49:52,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272110654] [2023-11-12 00:49:52,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:52,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:49:52,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:52,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:49:52,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:49:52,271 INFO L87 Difference]: Start difference. First operand 22454 states and 27538 transitions. Second operand has 4 states, 4 states have (on average 56.0) internal successors, (224), 3 states have internal predecessors, (224), 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) [2023-11-12 00:49:53,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:53,672 INFO L93 Difference]: Finished difference Result 48196 states and 59506 transitions. [2023-11-12 00:49:53,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:49:53,674 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 3 states have internal predecessors, (224), 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 229 [2023-11-12 00:49:53,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:53,724 INFO L225 Difference]: With dead ends: 48196 [2023-11-12 00:49:53,725 INFO L226 Difference]: Without dead ends: 23884 [2023-11-12 00:49:53,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:49:53,749 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 390 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:53,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 10 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-12 00:49:53,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23884 states. [2023-11-12 00:49:54,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23884 to 21453. [2023-11-12 00:49:54,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21453 states, 21452 states have (on average 1.1597053887749393) internal successors, (24878), 21452 states have internal predecessors, (24878), 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) [2023-11-12 00:49:54,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21453 states to 21453 states and 24878 transitions. [2023-11-12 00:49:54,242 INFO L78 Accepts]: Start accepts. Automaton has 21453 states and 24878 transitions. Word has length 229 [2023-11-12 00:49:54,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:54,243 INFO L495 AbstractCegarLoop]: Abstraction has 21453 states and 24878 transitions. [2023-11-12 00:49:54,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 3 states have internal predecessors, (224), 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) [2023-11-12 00:49:54,243 INFO L276 IsEmpty]: Start isEmpty. Operand 21453 states and 24878 transitions. [2023-11-12 00:49:54,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2023-11-12 00:49:54,273 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:54,273 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:54,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-12 00:49:54,274 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:54,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:54,274 INFO L85 PathProgramCache]: Analyzing trace with hash 243870456, now seen corresponding path program 1 times [2023-11-12 00:49:54,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:54,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236411219] [2023-11-12 00:49:54,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:54,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:54,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:54,912 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-11-12 00:49:54,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:54,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236411219] [2023-11-12 00:49:54,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236411219] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:49:54,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942055063] [2023-11-12 00:49:54,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:54,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:54,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c2199af-834a-4c9c-ab1d-2bd2b9c3c127/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:49:54,915 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c2199af-834a-4c9c-ab1d-2bd2b9c3c127/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:49:54,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c2199af-834a-4c9c-ab1d-2bd2b9c3c127/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:49:55,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:55,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 00:49:55,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:49:55,673 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 00:49:55,673 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:49:55,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942055063] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:55,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:49:55,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-12 00:49:55,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938689937] [2023-11-12 00:49:55,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:55,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:49:55,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:55,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:49:55,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:49:55,680 INFO L87 Difference]: Start difference. First operand 21453 states and 24878 transitions. Second operand has 4 states, 4 states have (on average 65.25) internal successors, (261), 3 states have internal predecessors, (261), 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) [2023-11-12 00:49:56,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:56,883 INFO L93 Difference]: Finished difference Result 59638 states and 69411 transitions. [2023-11-12 00:49:56,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:49:56,884 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 65.25) internal successors, (261), 3 states have internal predecessors, (261), 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 266 [2023-11-12 00:49:56,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:56,943 INFO L225 Difference]: With dead ends: 59638 [2023-11-12 00:49:56,943 INFO L226 Difference]: Without dead ends: 38758 [2023-11-12 00:49:56,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:49:56,965 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 449 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:56,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 8 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 00:49:57,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38758 states. [2023-11-12 00:49:57,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38758 to 38613. [2023-11-12 00:49:57,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38613 states, 38612 states have (on average 1.163576090334611) internal successors, (44928), 38612 states have internal predecessors, (44928), 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) [2023-11-12 00:49:57,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38613 states to 38613 states and 44928 transitions. [2023-11-12 00:49:57,881 INFO L78 Accepts]: Start accepts. Automaton has 38613 states and 44928 transitions. Word has length 266 [2023-11-12 00:49:57,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:57,882 INFO L495 AbstractCegarLoop]: Abstraction has 38613 states and 44928 transitions. [2023-11-12 00:49:57,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.25) internal successors, (261), 3 states have internal predecessors, (261), 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) [2023-11-12 00:49:57,882 INFO L276 IsEmpty]: Start isEmpty. Operand 38613 states and 44928 transitions. [2023-11-12 00:49:57,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2023-11-12 00:49:57,902 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:57,902 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:57,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c2199af-834a-4c9c-ab1d-2bd2b9c3c127/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:49:58,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c2199af-834a-4c9c-ab1d-2bd2b9c3c127/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:58,110 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:58,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:58,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1449557514, now seen corresponding path program 1 times [2023-11-12 00:49:58,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:58,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663870839] [2023-11-12 00:49:58,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:58,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:58,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:58,833 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-11-12 00:49:58,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:58,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663870839] [2023-11-12 00:49:58,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663870839] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:58,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:49:58,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:49:58,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808772635] [2023-11-12 00:49:58,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:58,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:49:58,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:58,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:49:58,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:49:58,837 INFO L87 Difference]: Start difference. First operand 38613 states and 44928 transitions. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 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) [2023-11-12 00:50:00,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:50:00,167 INFO L93 Difference]: Finished difference Result 90526 states and 105258 transitions. [2023-11-12 00:50:00,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:50:00,168 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 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 268 [2023-11-12 00:50:00,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:50:00,253 INFO L225 Difference]: With dead ends: 90526 [2023-11-12 00:50:00,253 INFO L226 Difference]: Without dead ends: 52200 [2023-11-12 00:50:00,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:50:00,288 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 131 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 00:50:00,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 70 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 00:50:00,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52200 states. [2023-11-12 00:50:01,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52200 to 50053. [2023-11-12 00:50:01,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50053 states, 50052 states have (on average 1.1624310716854471) internal successors, (58182), 50052 states have internal predecessors, (58182), 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) [2023-11-12 00:50:01,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50053 states to 50053 states and 58182 transitions. [2023-11-12 00:50:01,444 INFO L78 Accepts]: Start accepts. Automaton has 50053 states and 58182 transitions. Word has length 268 [2023-11-12 00:50:01,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:50:01,445 INFO L495 AbstractCegarLoop]: Abstraction has 50053 states and 58182 transitions. [2023-11-12 00:50:01,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 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) [2023-11-12 00:50:01,445 INFO L276 IsEmpty]: Start isEmpty. Operand 50053 states and 58182 transitions. [2023-11-12 00:50:01,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2023-11-12 00:50:01,477 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:50:01,478 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:50:01,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-12 00:50:01,479 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:50:01,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:50:01,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1192858181, now seen corresponding path program 1 times [2023-11-12 00:50:01,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:50:01,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39816339] [2023-11-12 00:50:01,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:01,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:50:01,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:02,450 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 00:50:02,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:50:02,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39816339] [2023-11-12 00:50:02,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39816339] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:50:02,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:50:02,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:50:02,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509869180] [2023-11-12 00:50:02,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:50:02,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:50:02,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:50:02,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:50:02,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:50:02,454 INFO L87 Difference]: Start difference. First operand 50053 states and 58182 transitions. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 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)