./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_698573aa-daeb-4251-af38-de6ed5d5ef35/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_698573aa-daeb-4251-af38-de6ed5d5ef35/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_698573aa-daeb-4251-af38-de6ed5d5ef35/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_698573aa-daeb-4251-af38-de6ed5d5ef35/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_698573aa-daeb-4251-af38-de6ed5d5ef35/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_698573aa-daeb-4251-af38-de6ed5d5ef35/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5c7b2e547f39f7d53d20335ecc1b1fbde6acdc52384cb52caa86017352bf317a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:14:21,703 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:14:21,815 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_698573aa-daeb-4251-af38-de6ed5d5ef35/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:14:21,823 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:14:21,824 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:14:21,871 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:14:21,872 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:14:21,873 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:14:21,874 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:14:21,879 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:14:21,879 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:14:21,880 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:14:21,880 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:14:21,882 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:14:21,883 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:14:21,883 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:14:21,884 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:14:21,884 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:14:21,885 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:14:21,885 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:14:21,886 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:14:21,886 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:14:21,888 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:14:21,888 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:14:21,889 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:14:21,889 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:14:21,890 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:14:21,890 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:14:21,891 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:14:21,891 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:14:21,892 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:14:21,893 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:14:21,893 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:14:21,893 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:14:21,908 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:14:21,909 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:14:21,909 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:14:21,909 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:14:21,909 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:14:21,910 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:14:21,910 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:14:21,910 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:14:21,911 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:14:21,911 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:14:21,911 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:14:21,912 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_698573aa-daeb-4251-af38-de6ed5d5ef35/bin/utaipan-verify-t7M7D8N6sZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_698573aa-daeb-4251-af38-de6ed5d5ef35/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5c7b2e547f39f7d53d20335ecc1b1fbde6acdc52384cb52caa86017352bf317a [2023-11-19 05:14:22,209 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:14:22,240 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:14:22,243 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:14:22,244 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:14:22,245 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:14:22,247 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_698573aa-daeb-4251-af38-de6ed5d5ef35/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-11-19 05:14:25,242 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:14:25,507 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:14:25,508 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_698573aa-daeb-4251-af38-de6ed5d5ef35/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-11-19 05:14:25,523 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_698573aa-daeb-4251-af38-de6ed5d5ef35/bin/utaipan-verify-t7M7D8N6sZ/data/b54aebabc/734c1d7b5e32427197af6df9fcb53d4c/FLAG687d6166d [2023-11-19 05:14:25,541 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_698573aa-daeb-4251-af38-de6ed5d5ef35/bin/utaipan-verify-t7M7D8N6sZ/data/b54aebabc/734c1d7b5e32427197af6df9fcb53d4c [2023-11-19 05:14:25,547 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:14:25,549 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:14:25,553 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:14:25,555 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:14:25,560 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:14:25,561 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:14:25" (1/1) ... [2023-11-19 05:14:25,562 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54473a8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:25, skipping insertion in model container [2023-11-19 05:14:25,562 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:14:25" (1/1) ... [2023-11-19 05:14:25,627 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:14:25,887 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_698573aa-daeb-4251-af38-de6ed5d5ef35/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[7834,7847] [2023-11-19 05:14:25,962 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:14:25,984 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:14:26,080 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_698573aa-daeb-4251-af38-de6ed5d5ef35/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[7834,7847] [2023-11-19 05:14:26,129 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:14:26,149 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:14:26,149 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:26 WrapperNode [2023-11-19 05:14:26,149 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:14:26,150 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:14:26,150 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:14:26,150 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:14:26,156 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:26" (1/1) ... [2023-11-19 05:14:26,169 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:26" (1/1) ... [2023-11-19 05:14:26,221 INFO L138 Inliner]: procedures = 25, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 666 [2023-11-19 05:14:26,221 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:14:26,222 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:14:26,222 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:14:26,223 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:14:26,232 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:26" (1/1) ... [2023-11-19 05:14:26,233 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:26" (1/1) ... [2023-11-19 05:14:26,238 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:26" (1/1) ... [2023-11-19 05:14:26,238 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:26" (1/1) ... [2023-11-19 05:14:26,252 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:26" (1/1) ... [2023-11-19 05:14:26,258 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:26" (1/1) ... [2023-11-19 05:14:26,262 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:26" (1/1) ... [2023-11-19 05:14:26,265 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:26" (1/1) ... [2023-11-19 05:14:26,271 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:14:26,272 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:14:26,273 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:14:26,273 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:14:26,274 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:26" (1/1) ... [2023-11-19 05:14:26,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:14:26,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_698573aa-daeb-4251-af38-de6ed5d5ef35/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:14:26,359 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_698573aa-daeb-4251-af38-de6ed5d5ef35/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:14:26,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_698573aa-daeb-4251-af38-de6ed5d5ef35/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:14:26,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:14:26,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:14:26,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:14:26,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:14:26,627 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:14:26,629 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:14:27,391 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:14:27,673 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:14:27,673 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 05:14:27,683 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:14:27 BoogieIcfgContainer [2023-11-19 05:14:27,683 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:14:27,686 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:14:27,686 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:14:27,689 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:14:27,689 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:14:25" (1/3) ... [2023-11-19 05:14:27,692 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16c12d3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:14:27, skipping insertion in model container [2023-11-19 05:14:27,693 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:14:26" (2/3) ... [2023-11-19 05:14:27,695 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16c12d3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:14:27, skipping insertion in model container [2023-11-19 05:14:27,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:14:27" (3/3) ... [2023-11-19 05:14:27,698 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-11-19 05:14:27,718 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:14:27,719 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:14:27,774 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:14:27,781 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;@26397397, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:14:27,782 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:14:27,787 INFO L276 IsEmpty]: Start isEmpty. Operand has 105 states, 102 states have (on average 1.7745098039215685) internal successors, (181), 104 states have internal predecessors, (181), 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) [2023-11-19 05:14:27,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-19 05:14:27,796 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:27,796 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] [2023-11-19 05:14:27,797 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:14:27,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:27,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1508744329, now seen corresponding path program 1 times [2023-11-19 05:14:27,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:27,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079041282] [2023-11-19 05:14:27,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:27,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:28,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:28,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:14:28,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:28,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079041282] [2023-11-19 05:14:28,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079041282] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:14:28,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:14:28,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:14:28,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237140993] [2023-11-19 05:14:28,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:14:28,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:14:28,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:28,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:14:28,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:14:28,491 INFO L87 Difference]: Start difference. First operand has 105 states, 102 states have (on average 1.7745098039215685) internal successors, (181), 104 states have internal predecessors, (181), 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 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 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) [2023-11-19 05:14:28,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:28,691 INFO L93 Difference]: Finished difference Result 178 states and 293 transitions. [2023-11-19 05:14:28,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:14:28,693 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 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 64 [2023-11-19 05:14:28,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:28,703 INFO L225 Difference]: With dead ends: 178 [2023-11-19 05:14:28,703 INFO L226 Difference]: Without dead ends: 102 [2023-11-19 05:14:28,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:14:28,710 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 486 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:28,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 112 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:14:28,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-11-19 05:14:28,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2023-11-19 05:14:28,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.2178217821782178) internal successors, (123), 101 states have internal predecessors, (123), 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) [2023-11-19 05:14:28,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 123 transitions. [2023-11-19 05:14:28,750 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 123 transitions. Word has length 64 [2023-11-19 05:14:28,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:28,752 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 123 transitions. [2023-11-19 05:14:28,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 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) [2023-11-19 05:14:28,752 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 123 transitions. [2023-11-19 05:14:28,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-19 05:14:28,755 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:28,755 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] [2023-11-19 05:14:28,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:14:28,756 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:14:28,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:28,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1792819632, now seen corresponding path program 1 times [2023-11-19 05:14:28,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:28,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413176045] [2023-11-19 05:14:28,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:28,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:28,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:29,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:14:29,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:29,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413176045] [2023-11-19 05:14:29,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413176045] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:14:29,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:14:29,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:14:29,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369181098] [2023-11-19 05:14:29,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:14:29,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:14:29,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:29,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:14:29,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:14:29,123 INFO L87 Difference]: Start difference. First operand 102 states and 123 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 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) [2023-11-19 05:14:29,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:29,290 INFO L93 Difference]: Finished difference Result 152 states and 190 transitions. [2023-11-19 05:14:29,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:14:29,291 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 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 65 [2023-11-19 05:14:29,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:29,293 INFO L225 Difference]: With dead ends: 152 [2023-11-19 05:14:29,293 INFO L226 Difference]: Without dead ends: 102 [2023-11-19 05:14:29,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:14:29,296 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 276 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:29,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 97 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:14:29,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-11-19 05:14:29,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2023-11-19 05:14:29,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.198019801980198) internal successors, (121), 101 states have internal predecessors, (121), 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) [2023-11-19 05:14:29,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 121 transitions. [2023-11-19 05:14:29,311 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 121 transitions. Word has length 65 [2023-11-19 05:14:29,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:29,311 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 121 transitions. [2023-11-19 05:14:29,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 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) [2023-11-19 05:14:29,312 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 121 transitions. [2023-11-19 05:14:29,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-19 05:14:29,318 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:29,319 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] [2023-11-19 05:14:29,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:14:29,319 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:14:29,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:29,320 INFO L85 PathProgramCache]: Analyzing trace with hash 661099159, now seen corresponding path program 1 times [2023-11-19 05:14:29,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:29,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693936372] [2023-11-19 05:14:29,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:29,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:29,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:29,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:14:29,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:29,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693936372] [2023-11-19 05:14:29,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693936372] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:14:29,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:14:29,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:14:29,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899888660] [2023-11-19 05:14:29,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:14:29,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:14:29,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:29,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:14:29,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:14:29,477 INFO L87 Difference]: Start difference. First operand 102 states and 121 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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) [2023-11-19 05:14:29,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:29,606 INFO L93 Difference]: Finished difference Result 160 states and 196 transitions. [2023-11-19 05:14:29,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:14:29,607 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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 66 [2023-11-19 05:14:29,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:29,609 INFO L225 Difference]: With dead ends: 160 [2023-11-19 05:14:29,609 INFO L226 Difference]: Without dead ends: 102 [2023-11-19 05:14:29,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:14:29,611 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 292 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:29,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 81 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:14:29,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-11-19 05:14:29,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2023-11-19 05:14:29,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.1782178217821782) internal successors, (119), 101 states have internal predecessors, (119), 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) [2023-11-19 05:14:29,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 119 transitions. [2023-11-19 05:14:29,620 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 119 transitions. Word has length 66 [2023-11-19 05:14:29,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:29,620 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 119 transitions. [2023-11-19 05:14:29,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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) [2023-11-19 05:14:29,621 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 119 transitions. [2023-11-19 05:14:29,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-19 05:14:29,622 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:29,622 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] [2023-11-19 05:14:29,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:14:29,623 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:14:29,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:29,623 INFO L85 PathProgramCache]: Analyzing trace with hash 335667856, now seen corresponding path program 1 times [2023-11-19 05:14:29,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:29,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424051302] [2023-11-19 05:14:29,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:29,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:29,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:29,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:14:29,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:29,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424051302] [2023-11-19 05:14:29,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424051302] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:14:29,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:14:29,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:14:29,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019846990] [2023-11-19 05:14:29,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:14:29,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:14:29,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:29,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:14:29,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:14:29,788 INFO L87 Difference]: Start difference. First operand 102 states and 119 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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) [2023-11-19 05:14:29,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:29,901 INFO L93 Difference]: Finished difference Result 156 states and 188 transitions. [2023-11-19 05:14:29,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:14:29,901 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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 67 [2023-11-19 05:14:29,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:29,905 INFO L225 Difference]: With dead ends: 156 [2023-11-19 05:14:29,905 INFO L226 Difference]: Without dead ends: 102 [2023-11-19 05:14:29,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:14:29,917 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 274 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:29,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 89 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:14:29,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-11-19 05:14:29,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2023-11-19 05:14:29,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 101 states have internal predecessors, (117), 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) [2023-11-19 05:14:29,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 117 transitions. [2023-11-19 05:14:29,925 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 117 transitions. Word has length 67 [2023-11-19 05:14:29,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:29,926 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 117 transitions. [2023-11-19 05:14:29,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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) [2023-11-19 05:14:29,926 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 117 transitions. [2023-11-19 05:14:29,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-19 05:14:29,927 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:29,928 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] [2023-11-19 05:14:29,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 05:14:29,928 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:14:29,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:29,934 INFO L85 PathProgramCache]: Analyzing trace with hash 2012816963, now seen corresponding path program 1 times [2023-11-19 05:14:29,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:29,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288569992] [2023-11-19 05:14:29,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:29,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:29,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:30,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:14:30,125 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:30,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288569992] [2023-11-19 05:14:30,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288569992] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:14:30,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:14:30,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:14:30,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941090528] [2023-11-19 05:14:30,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:14:30,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:14:30,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:30,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:14:30,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:14:30,128 INFO L87 Difference]: Start difference. First operand 102 states and 117 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2023-11-19 05:14:30,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:30,245 INFO L93 Difference]: Finished difference Result 164 states and 193 transitions. [2023-11-19 05:14:30,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:14:30,246 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 68 [2023-11-19 05:14:30,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:30,247 INFO L225 Difference]: With dead ends: 164 [2023-11-19 05:14:30,247 INFO L226 Difference]: Without dead ends: 102 [2023-11-19 05:14:30,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:14:30,255 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 291 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:30,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 73 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:14:30,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-11-19 05:14:30,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2023-11-19 05:14:30,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 states have internal predecessors, (115), 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) [2023-11-19 05:14:30,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 115 transitions. [2023-11-19 05:14:30,271 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 115 transitions. Word has length 68 [2023-11-19 05:14:30,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:30,273 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 115 transitions. [2023-11-19 05:14:30,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2023-11-19 05:14:30,273 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 115 transitions. [2023-11-19 05:14:30,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-19 05:14:30,278 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:30,278 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] [2023-11-19 05:14:30,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 05:14:30,279 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:14:30,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:30,279 INFO L85 PathProgramCache]: Analyzing trace with hash 519096712, now seen corresponding path program 1 times [2023-11-19 05:14:30,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:30,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700727017] [2023-11-19 05:14:30,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:30,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:30,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:14:40,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:14:40,859 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:14:40,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700727017] [2023-11-19 05:14:40,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700727017] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:14:40,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:14:40,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2023-11-19 05:14:40,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593290784] [2023-11-19 05:14:40,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:14:40,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-19 05:14:40,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:14:40,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-19 05:14:40,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2023-11-19 05:14:40,862 INFO L87 Difference]: Start difference. First operand 102 states and 115 transitions. Second operand has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 34 states have internal predecessors, (69), 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) [2023-11-19 05:14:50,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:14:50,379 INFO L93 Difference]: Finished difference Result 175 states and 212 transitions. [2023-11-19 05:14:50,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-19 05:14:50,380 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 34 states have internal predecessors, (69), 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 69 [2023-11-19 05:14:50,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:14:50,382 INFO L225 Difference]: With dead ends: 175 [2023-11-19 05:14:50,382 INFO L226 Difference]: Without dead ends: 137 [2023-11-19 05:14:50,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=883, Invalid=2777, Unknown=0, NotChecked=0, Total=3660 [2023-11-19 05:14:50,384 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 628 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 1864 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 1868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:14:50,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [628 Valid, 1014 Invalid, 1868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1864 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-19 05:14:50,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-11-19 05:14:50,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2023-11-19 05:14:50,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.1865671641791045) internal successors, (159), 134 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) [2023-11-19 05:14:50,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 159 transitions. [2023-11-19 05:14:50,394 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 159 transitions. Word has length 69 [2023-11-19 05:14:50,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:14:50,395 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 159 transitions. [2023-11-19 05:14:50,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 34 states have internal predecessors, (69), 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) [2023-11-19 05:14:50,395 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 159 transitions. [2023-11-19 05:14:50,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-19 05:14:50,396 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:14:50,396 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] [2023-11-19 05:14:50,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 05:14:50,397 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:14:50,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:14:50,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1394579065, now seen corresponding path program 1 times [2023-11-19 05:14:50,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:14:50,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110591457] [2023-11-19 05:14:50,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:14:50,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:14:50,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:02,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:15:02,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:15:02,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110591457] [2023-11-19 05:15:02,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110591457] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:15:02,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:15:02,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2023-11-19 05:15:02,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65161736] [2023-11-19 05:15:02,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:15:02,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-19 05:15:02,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:15:02,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-19 05:15:02,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1205, Unknown=0, NotChecked=0, Total=1332 [2023-11-19 05:15:02,191 INFO L87 Difference]: Start difference. First operand 135 states and 159 transitions. Second operand has 37 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 36 states have internal predecessors, (71), 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)