./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E --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 22565549446fb10d699e81ca4083722d91d5f2743033fe3de4e7c76b9089640a --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:18:30,438 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:18:30,498 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 04:18:30,504 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:18:30,504 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:18:30,532 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:18:30,533 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:18:30,533 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:18:30,533 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:18:30,533 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:18:30,533 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:18:30,534 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:18:30,534 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:18:30,534 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 04:18:30,534 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:18:30,534 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:18:30,534 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 04:18:30,534 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 04:18:30,534 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:18:30,534 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 04:18:30,534 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 04:18:30,535 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 04:18:30,535 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:18:30,535 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 04:18:30,535 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 04:18:30,535 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 04:18:30,535 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 04:18:30,535 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:18:30,536 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 04:18:30,536 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:18:30,536 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 04:18:30,536 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:18:30,536 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 04:18:30,536 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 04:18:30,536 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:18:30,536 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:18:30,536 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:18:30,536 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:18:30,537 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:18:30,537 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:18:30,537 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:18:30,537 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 04:18:30,537 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 04:18:30,537 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 04:18:30,537 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:18:30,537 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:18:30,537 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 04:18:30,537 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E 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 -> 22565549446fb10d699e81ca4083722d91d5f2743033fe3de4e7c76b9089640a [2024-11-14 04:18:30,818 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:18:30,827 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:18:30,829 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:18:30,832 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:18:30,833 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:18:30,834 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c Unable to find full path for "g++" [2024-11-14 04:18:32,691 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:18:33,045 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:18:33,045 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2024-11-14 04:18:33,064 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/data/983df4cd1/4bc52e0cc9614be79c829bd97914780a/FLAG7e9306d6a [2024-11-14 04:18:33,092 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/data/983df4cd1/4bc52e0cc9614be79c829bd97914780a [2024-11-14 04:18:33,095 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:18:33,097 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:18:33,099 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:18:33,099 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:18:33,103 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:18:33,105 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:18:33" (1/1) ... [2024-11-14 04:18:33,106 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@429c7c3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:18:33, skipping insertion in model container [2024-11-14 04:18:33,107 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:18:33" (1/1) ... [2024-11-14 04:18:33,165 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:18:33,469 WARN L250 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_692eecf2-ac80-4da1-9579-7425d75ac07f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[7163,7176] [2024-11-14 04:18:33,527 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:18:33,544 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:18:33,602 WARN L250 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_692eecf2-ac80-4da1-9579-7425d75ac07f/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[7163,7176] [2024-11-14 04:18:33,628 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:18:33,644 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:18:33,645 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:18:33 WrapperNode [2024-11-14 04:18:33,645 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:18:33,646 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:18:33,646 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:18:33,646 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:18:33,653 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:18:33" (1/1) ... [2024-11-14 04:18:33,663 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:18:33" (1/1) ... [2024-11-14 04:18:33,698 INFO L138 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 644 [2024-11-14 04:18:33,698 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:18:33,699 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:18:33,699 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:18:33,699 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:18:33,707 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:18:33" (1/1) ... [2024-11-14 04:18:33,707 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:18:33" (1/1) ... [2024-11-14 04:18:33,710 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:18:33" (1/1) ... [2024-11-14 04:18:33,711 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:18:33" (1/1) ... [2024-11-14 04:18:33,719 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:18:33" (1/1) ... [2024-11-14 04:18:33,726 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:18:33" (1/1) ... [2024-11-14 04:18:33,729 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:18:33" (1/1) ... [2024-11-14 04:18:33,732 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:18:33" (1/1) ... [2024-11-14 04:18:33,740 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:18:33,741 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:18:33,741 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:18:33,741 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:18:33,742 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:18:33" (1/1) ... [2024-11-14 04:18:33,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:18:33,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:18:33,773 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:18:33,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:18:33,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 04:18:33,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 04:18:33,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:18:33,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:18:33,953 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:18:33,955 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:18:34,729 INFO L? ?]: Removed 81 outVars from TransFormulas that were not future-live. [2024-11-14 04:18:34,729 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:18:34,968 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:18:34,968 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-14 04:18:34,969 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:18:34 BoogieIcfgContainer [2024-11-14 04:18:34,969 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:18:34,971 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:18:34,971 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:18:34,976 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:18:34,976 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:18:33" (1/3) ... [2024-11-14 04:18:34,977 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1806d766 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:18:34, skipping insertion in model container [2024-11-14 04:18:34,978 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:18:33" (2/3) ... [2024-11-14 04:18:34,979 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1806d766 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:18:34, skipping insertion in model container [2024-11-14 04:18:34,979 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:18:34" (3/3) ... [2024-11-14 04:18:34,981 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2024-11-14 04:18:34,998 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:18:35,000 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c that has 1 procedures, 116 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2024-11-14 04:18:35,052 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:18:35,083 INFO L333 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, 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;@6b12c8a5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:18:35,083 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 04:18:35,090 INFO L276 IsEmpty]: Start isEmpty. Operand has 116 states, 114 states have (on average 1.6929824561403508) internal successors, (193), 115 states have internal predecessors, (193), 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) [2024-11-14 04:18:35,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-14 04:18:35,096 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:18:35,096 INFO L215 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] [2024-11-14 04:18:35,097 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:18:35,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:18:35,102 INFO L85 PathProgramCache]: Analyzing trace with hash 433690954, now seen corresponding path program 1 times [2024-11-14 04:18:35,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:18:35,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358412598] [2024-11-14 04:18:35,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:18:35,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:18:35,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:18:35,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:18:35,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:18:35,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358412598] [2024-11-14 04:18:35,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358412598] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:18:35,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:18:35,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 04:18:35,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997674196] [2024-11-14 04:18:35,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:18:35,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:18:35,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:18:35,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:18:35,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:18:35,931 INFO L87 Difference]: Start difference. First operand has 116 states, 114 states have (on average 1.6929824561403508) internal successors, (193), 115 states have internal predecessors, (193), 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 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:18:36,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:18:36,206 INFO L93 Difference]: Finished difference Result 311 states and 498 transitions. [2024-11-14 04:18:36,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:18:36,211 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2024-11-14 04:18:36,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:18:36,225 INFO L225 Difference]: With dead ends: 311 [2024-11-14 04:18:36,227 INFO L226 Difference]: Without dead ends: 231 [2024-11-14 04:18:36,231 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:18:36,234 INFO L432 NwaCegarLoop]: 308 mSDtfsCounter, 364 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:18:36,235 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 534 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:18:36,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-11-14 04:18:36,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 227. [2024-11-14 04:18:36,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.3938053097345133) internal successors, (315), 226 states have internal predecessors, (315), 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) [2024-11-14 04:18:36,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 315 transitions. [2024-11-14 04:18:36,284 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 315 transitions. Word has length 42 [2024-11-14 04:18:36,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:18:36,285 INFO L471 AbstractCegarLoop]: Abstraction has 227 states and 315 transitions. [2024-11-14 04:18:36,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:18:36,285 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 315 transitions. [2024-11-14 04:18:36,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-14 04:18:36,286 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:18:36,287 INFO L215 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] [2024-11-14 04:18:36,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 04:18:36,287 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:18:36,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:18:36,288 INFO L85 PathProgramCache]: Analyzing trace with hash 482426946, now seen corresponding path program 1 times [2024-11-14 04:18:36,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:18:36,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007340657] [2024-11-14 04:18:36,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:18:36,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:18:36,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:18:36,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:18:36,498 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:18:36,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007340657] [2024-11-14 04:18:36,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007340657] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:18:36,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:18:36,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 04:18:36,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32732302] [2024-11-14 04:18:36,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:18:36,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:18:36,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:18:36,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:18:36,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:18:36,501 INFO L87 Difference]: Start difference. First operand 227 states and 315 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 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) [2024-11-14 04:18:36,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:18:36,801 INFO L93 Difference]: Finished difference Result 500 states and 706 transitions. [2024-11-14 04:18:36,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:18:36,803 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 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 43 [2024-11-14 04:18:36,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:18:36,805 INFO L225 Difference]: With dead ends: 500 [2024-11-14 04:18:36,806 INFO L226 Difference]: Without dead ends: 299 [2024-11-14 04:18:36,807 INFO L431 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 [2024-11-14 04:18:36,808 INFO L432 NwaCegarLoop]: 108 mSDtfsCounter, 405 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:18:36,808 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 156 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:18:36,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2024-11-14 04:18:36,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 297. [2024-11-14 04:18:36,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 1.3986486486486487) internal successors, (414), 296 states have internal predecessors, (414), 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) [2024-11-14 04:18:36,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 414 transitions. [2024-11-14 04:18:36,850 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 414 transitions. Word has length 43 [2024-11-14 04:18:36,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:18:36,851 INFO L471 AbstractCegarLoop]: Abstraction has 297 states and 414 transitions. [2024-11-14 04:18:36,851 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 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) [2024-11-14 04:18:36,851 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 414 transitions. [2024-11-14 04:18:36,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-14 04:18:36,852 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:18:36,852 INFO L215 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] [2024-11-14 04:18:36,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 04:18:36,853 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:18:36,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:18:36,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1318733137, now seen corresponding path program 1 times [2024-11-14 04:18:36,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:18:36,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039673073] [2024-11-14 04:18:36,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:18:36,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:18:36,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:18:37,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:18:37,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:18:37,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039673073] [2024-11-14 04:18:37,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039673073] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:18:37,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:18:37,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 04:18:37,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912783770] [2024-11-14 04:18:37,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:18:37,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:18:37,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:18:37,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:18:37,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:18:37,144 INFO L87 Difference]: Start difference. First operand 297 states and 414 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 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) [2024-11-14 04:18:37,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:18:37,405 INFO L93 Difference]: Finished difference Result 718 states and 1023 transitions. [2024-11-14 04:18:37,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:18:37,407 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 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 43 [2024-11-14 04:18:37,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:18:37,409 INFO L225 Difference]: With dead ends: 718 [2024-11-14 04:18:37,409 INFO L226 Difference]: Without dead ends: 463 [2024-11-14 04:18:37,412 INFO L431 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 [2024-11-14 04:18:37,413 INFO L432 NwaCegarLoop]: 110 mSDtfsCounter, 385 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:18:37,413 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 168 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:18:37,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2024-11-14 04:18:37,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 461. [2024-11-14 04:18:37,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 1.4108695652173913) internal successors, (649), 460 states have internal predecessors, (649), 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) [2024-11-14 04:18:37,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 649 transitions. [2024-11-14 04:18:37,435 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 649 transitions. Word has length 43 [2024-11-14 04:18:37,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:18:37,435 INFO L471 AbstractCegarLoop]: Abstraction has 461 states and 649 transitions. [2024-11-14 04:18:37,435 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 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) [2024-11-14 04:18:37,436 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 649 transitions. [2024-11-14 04:18:37,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-14 04:18:37,437 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:18:37,437 INFO L215 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] [2024-11-14 04:18:37,437 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 04:18:37,437 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:18:37,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:18:37,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1809353888, now seen corresponding path program 1 times [2024-11-14 04:18:37,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:18:37,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321535772] [2024-11-14 04:18:37,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:18:37,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:18:37,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:18:37,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:18:37,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:18:37,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321535772] [2024-11-14 04:18:37,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321535772] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:18:37,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:18:37,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 04:18:37,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966560273] [2024-11-14 04:18:37,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:18:37,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:18:37,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:18:37,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:18:37,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:18:37,648 INFO L87 Difference]: Start difference. First operand 461 states and 649 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 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) [2024-11-14 04:18:37,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:18:37,893 INFO L93 Difference]: Finished difference Result 1190 states and 1707 transitions. [2024-11-14 04:18:37,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:18:37,894 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 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 43 [2024-11-14 04:18:37,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:18:37,898 INFO L225 Difference]: With dead ends: 1190 [2024-11-14 04:18:37,900 INFO L226 Difference]: Without dead ends: 791 [2024-11-14 04:18:37,901 INFO L431 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 [2024-11-14 04:18:37,902 INFO L432 NwaCegarLoop]: 110 mSDtfsCounter, 368 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:18:37,902 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 176 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:18:37,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2024-11-14 04:18:37,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 789. [2024-11-14 04:18:37,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 788 states have (on average 1.4200507614213198) internal successors, (1119), 788 states have internal predecessors, (1119), 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) [2024-11-14 04:18:37,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1119 transitions. [2024-11-14 04:18:37,941 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1119 transitions. Word has length 43 [2024-11-14 04:18:37,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:18:37,942 INFO L471 AbstractCegarLoop]: Abstraction has 789 states and 1119 transitions. [2024-11-14 04:18:37,942 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 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) [2024-11-14 04:18:37,942 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1119 transitions. [2024-11-14 04:18:37,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-14 04:18:37,943 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:18:37,944 INFO L215 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] [2024-11-14 04:18:37,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 04:18:37,944 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:18:37,944 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:18:37,944 INFO L85 PathProgramCache]: Analyzing trace with hash -660088034, now seen corresponding path program 1 times [2024-11-14 04:18:37,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:18:37,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131156502] [2024-11-14 04:18:37,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:18:37,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:18:38,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:18:38,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:18:38,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:18:38,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131156502] [2024-11-14 04:18:38,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131156502] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:18:38,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:18:38,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-14 04:18:38,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774462983] [2024-11-14 04:18:38,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:18:38,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 04:18:38,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:18:38,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 04:18:38,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-14 04:18:38,732 INFO L87 Difference]: Start difference. First operand 789 states and 1119 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 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) [2024-11-14 04:18:39,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:18:39,493 INFO L93 Difference]: Finished difference Result 4386 states and 6362 transitions. [2024-11-14 04:18:39,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 04:18:39,493 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 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 44 [2024-11-14 04:18:39,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:18:39,508 INFO L225 Difference]: With dead ends: 4386 [2024-11-14 04:18:39,508 INFO L226 Difference]: Without dead ends: 3728 [2024-11-14 04:18:39,510 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2024-11-14 04:18:39,510 INFO L432 NwaCegarLoop]: 121 mSDtfsCounter, 1178 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1178 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:18:39,511 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1178 Valid, 716 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 04:18:39,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3728 states. [2024-11-14 04:18:39,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3728 to 2326. [2024-11-14 04:18:39,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2326 states, 2325 states have (on average 1.4189247311827957) internal successors, (3299), 2325 states have internal predecessors, (3299), 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) [2024-11-14 04:18:39,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2326 states to 2326 states and 3299 transitions. [2024-11-14 04:18:39,606 INFO L78 Accepts]: Start accepts. Automaton has 2326 states and 3299 transitions. Word has length 44 [2024-11-14 04:18:39,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:18:39,606 INFO L471 AbstractCegarLoop]: Abstraction has 2326 states and 3299 transitions. [2024-11-14 04:18:39,607 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 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) [2024-11-14 04:18:39,607 INFO L276 IsEmpty]: Start isEmpty. Operand 2326 states and 3299 transitions. [2024-11-14 04:18:39,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-14 04:18:39,608 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:18:39,608 INFO L215 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] [2024-11-14 04:18:39,609 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 04:18:39,609 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:18:39,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:18:39,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1007483138, now seen corresponding path program 1 times [2024-11-14 04:18:39,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:18:39,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504150240] [2024-11-14 04:18:39,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:18:39,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:18:39,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:18:40,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:18:40,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:18:40,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504150240] [2024-11-14 04:18:40,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504150240] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:18:40,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:18:40,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-14 04:18:40,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74149419] [2024-11-14 04:18:40,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:18:40,137 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 04:18:40,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:18:40,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 04:18:40,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-14 04:18:40,139 INFO L87 Difference]: Start difference. First operand 2326 states and 3299 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 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) [2024-11-14 04:18:40,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:18:40,664 INFO L93 Difference]: Finished difference Result 4009 states and 5726 transitions. [2024-11-14 04:18:40,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 04:18:40,665 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 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 44 [2024-11-14 04:18:40,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:18:40,677 INFO L225 Difference]: With dead ends: 4009 [2024-11-14 04:18:40,678 INFO L226 Difference]: Without dead ends: 3558 [2024-11-14 04:18:40,679 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2024-11-14 04:18:40,680 INFO L432 NwaCegarLoop]: 168 mSDtfsCounter, 1364 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1364 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:18:40,681 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1364 Valid, 659 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:18:40,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3558 states. [2024-11-14 04:18:40,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3558 to 2862. [2024-11-14 04:18:40,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2862 states, 2861 states have (on average 1.411744145403705) internal successors, (4039), 2861 states have internal predecessors, (4039), 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) [2024-11-14 04:18:40,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 4039 transitions. [2024-11-14 04:18:40,772 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 4039 transitions. Word has length 44 [2024-11-14 04:18:40,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:18:40,772 INFO L471 AbstractCegarLoop]: Abstraction has 2862 states and 4039 transitions. [2024-11-14 04:18:40,773 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 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) [2024-11-14 04:18:40,773 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 4039 transitions. [2024-11-14 04:18:40,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-14 04:18:40,773 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:18:40,774 INFO L215 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] [2024-11-14 04:18:40,774 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-14 04:18:40,774 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:18:40,774 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:18:40,774 INFO L85 PathProgramCache]: Analyzing trace with hash 448494302, now seen corresponding path program 1 times [2024-11-14 04:18:40,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:18:40,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236471557] [2024-11-14 04:18:40,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:18:40,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:18:40,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:18:41,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:18:41,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:18:41,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236471557] [2024-11-14 04:18:41,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236471557] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:18:41,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:18:41,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-14 04:18:41,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292994144] [2024-11-14 04:18:41,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:18:41,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 04:18:41,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:18:41,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 04:18:41,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-14 04:18:41,321 INFO L87 Difference]: Start difference. First operand 2862 states and 4039 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 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) [2024-11-14 04:18:41,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:18:41,945 INFO L93 Difference]: Finished difference Result 4485 states and 6341 transitions. [2024-11-14 04:18:41,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 04:18:41,946 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 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 44 [2024-11-14 04:18:41,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:18:41,962 INFO L225 Difference]: With dead ends: 4485 [2024-11-14 04:18:41,962 INFO L226 Difference]: Without dead ends: 4332 [2024-11-14 04:18:41,964 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2024-11-14 04:18:41,964 INFO L432 NwaCegarLoop]: 220 mSDtfsCounter, 1073 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1073 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:18:41,965 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1073 Valid, 860 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 04:18:41,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4332 states. [2024-11-14 04:18:42,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4332 to 3283. [2024-11-14 04:18:42,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3283 states, 3282 states have (on average 1.408897014015844) internal successors, (4624), 3282 states have internal predecessors, (4624), 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) [2024-11-14 04:18:42,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3283 states to 3283 states and 4624 transitions. [2024-11-14 04:18:42,061 INFO L78 Accepts]: Start accepts. Automaton has 3283 states and 4624 transitions. Word has length 44 [2024-11-14 04:18:42,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:18:42,061 INFO L471 AbstractCegarLoop]: Abstraction has 3283 states and 4624 transitions. [2024-11-14 04:18:42,061 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 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) [2024-11-14 04:18:42,062 INFO L276 IsEmpty]: Start isEmpty. Operand 3283 states and 4624 transitions. [2024-11-14 04:18:42,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-14 04:18:42,062 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:18:42,062 INFO L215 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] [2024-11-14 04:18:42,062 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-14 04:18:42,062 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:18:42,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:18:42,065 INFO L85 PathProgramCache]: Analyzing trace with hash 137896914, now seen corresponding path program 1 times [2024-11-14 04:18:42,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:18:42,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482422328] [2024-11-14 04:18:42,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:18:42,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:18:42,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:18:42,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:18:42,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:18:42,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482422328] [2024-11-14 04:18:42,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482422328] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:18:42,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:18:42,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-14 04:18:42,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160471861] [2024-11-14 04:18:42,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:18:42,685 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-14 04:18:42,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:18:42,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-14 04:18:42,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-11-14 04:18:42,685 INFO L87 Difference]: Start difference. First operand 3283 states and 4624 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 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) [2024-11-14 04:18:43,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:18:43,161 INFO L93 Difference]: Finished difference Result 7672 states and 10846 transitions. [2024-11-14 04:18:43,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-14 04:18:43,162 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 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 46 [2024-11-14 04:18:43,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:18:43,185 INFO L225 Difference]: With dead ends: 7672 [2024-11-14 04:18:43,185 INFO L226 Difference]: Without dead ends: 6794 [2024-11-14 04:18:43,188 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2024-11-14 04:18:43,189 INFO L432 NwaCegarLoop]: 274 mSDtfsCounter, 499 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 1190 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:18:43,189 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [499 Valid, 1190 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:18:43,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6794 states. [2024-11-14 04:18:43,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6794 to 4525. [2024-11-14 04:18:43,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4525 states, 4524 states have (on average 1.4140141467727674) internal successors, (6397), 4524 states have internal predecessors, (6397), 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) [2024-11-14 04:18:43,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4525 states to 4525 states and 6397 transitions. [2024-11-14 04:18:43,320 INFO L78 Accepts]: Start accepts. Automaton has 4525 states and 6397 transitions. Word has length 46 [2024-11-14 04:18:43,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:18:43,320 INFO L471 AbstractCegarLoop]: Abstraction has 4525 states and 6397 transitions. [2024-11-14 04:18:43,320 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 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) [2024-11-14 04:18:43,320 INFO L276 IsEmpty]: Start isEmpty. Operand 4525 states and 6397 transitions. [2024-11-14 04:18:43,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-14 04:18:43,321 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:18:43,321 INFO L215 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] [2024-11-14 04:18:43,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-14 04:18:43,321 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:18:43,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:18:43,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1593874354, now seen corresponding path program 1 times [2024-11-14 04:18:43,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:18:43,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212911974] [2024-11-14 04:18:43,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:18:43,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:18:43,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:18:43,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:18:43,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:18:43,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212911974] [2024-11-14 04:18:43,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212911974] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:18:43,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:18:43,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-14 04:18:43,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787863507] [2024-11-14 04:18:43,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:18:43,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-14 04:18:43,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:18:43,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-14 04:18:43,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-11-14 04:18:43,959 INFO L87 Difference]: Start difference. First operand 4525 states and 6397 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 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) [2024-11-14 04:18:44,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:18:44,719 INFO L93 Difference]: Finished difference Result 6870 states and 9702 transitions. [2024-11-14 04:18:44,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-14 04:18:44,720 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 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 46 [2024-11-14 04:18:44,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:18:44,740 INFO L225 Difference]: With dead ends: 6870 [2024-11-14 04:18:44,740 INFO L226 Difference]: Without dead ends: 6212 [2024-11-14 04:18:44,743 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2024-11-14 04:18:44,743 INFO L432 NwaCegarLoop]: 192 mSDtfsCounter, 409 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 1037 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:18:44,744 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 1037 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 04:18:44,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6212 states. [2024-11-14 04:18:44,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6212 to 4552. [2024-11-14 04:18:44,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4552 states, 4551 states have (on average 1.4115578993627773) internal successors, (6424), 4551 states have internal predecessors, (6424), 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) [2024-11-14 04:18:44,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4552 states to 4552 states and 6424 transitions. [2024-11-14 04:18:44,860 INFO L78 Accepts]: Start accepts. Automaton has 4552 states and 6424 transitions. Word has length 46 [2024-11-14 04:18:44,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:18:44,861 INFO L471 AbstractCegarLoop]: Abstraction has 4552 states and 6424 transitions. [2024-11-14 04:18:44,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 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) [2024-11-14 04:18:44,861 INFO L276 IsEmpty]: Start isEmpty. Operand 4552 states and 6424 transitions. [2024-11-14 04:18:44,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-14 04:18:44,862 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:18:44,862 INFO L215 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] [2024-11-14 04:18:44,862 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-14 04:18:44,862 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:18:44,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:18:44,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1540338798, now seen corresponding path program 1 times [2024-11-14 04:18:44,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:18:44,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001796655] [2024-11-14 04:18:44,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:18:44,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:18:44,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:18:45,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:18:45,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:18:45,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001796655] [2024-11-14 04:18:45,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001796655] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:18:45,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:18:45,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-14 04:18:45,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818998189] [2024-11-14 04:18:45,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:18:45,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-14 04:18:45,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:18:45,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-14 04:18:45,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2024-11-14 04:18:45,429 INFO L87 Difference]: Start difference. First operand 4552 states and 6424 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 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) [2024-11-14 04:18:45,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:18:45,915 INFO L93 Difference]: Finished difference Result 8179 states and 11541 transitions. [2024-11-14 04:18:45,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 04:18:45,916 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 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 46 [2024-11-14 04:18:45,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:18:45,941 INFO L225 Difference]: With dead ends: 8179 [2024-11-14 04:18:45,941 INFO L226 Difference]: Without dead ends: 8033 [2024-11-14 04:18:45,944 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2024-11-14 04:18:45,944 INFO L432 NwaCegarLoop]: 323 mSDtfsCounter, 462 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 1283 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:18:45,945 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [462 Valid, 1283 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:18:45,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8033 states. [2024-11-14 04:18:46,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8033 to 4555. [2024-11-14 04:18:46,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4555 states, 4554 states have (on average 1.4112867808519982) internal successors, (6427), 4554 states have internal predecessors, (6427), 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) [2024-11-14 04:18:46,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4555 states to 4555 states and 6427 transitions. [2024-11-14 04:18:46,064 INFO L78 Accepts]: Start accepts. Automaton has 4555 states and 6427 transitions. Word has length 46 [2024-11-14 04:18:46,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:18:46,064 INFO L471 AbstractCegarLoop]: Abstraction has 4555 states and 6427 transitions. [2024-11-14 04:18:46,064 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 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) [2024-11-14 04:18:46,065 INFO L276 IsEmpty]: Start isEmpty. Operand 4555 states and 6427 transitions. [2024-11-14 04:18:46,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-14 04:18:46,065 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:18:46,065 INFO L215 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] [2024-11-14 04:18:46,066 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-14 04:18:46,066 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:18:46,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:18:46,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1660952568, now seen corresponding path program 1 times [2024-11-14 04:18:46,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:18:46,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470970994] [2024-11-14 04:18:46,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:18:46,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:18:46,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:18:46,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:18:46,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:18:46,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470970994] [2024-11-14 04:18:46,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470970994] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:18:46,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:18:46,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:18:46,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352751682] [2024-11-14 04:18:46,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:18:46,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:18:46,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:18:46,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:18:46,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:18:46,116 INFO L87 Difference]: Start difference. First operand 4555 states and 6427 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2024-11-14 04:18:46,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:18:46,188 INFO L93 Difference]: Finished difference Result 8114 states and 11520 transitions. [2024-11-14 04:18:46,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:18:46,188 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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 47 [2024-11-14 04:18:46,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:18:46,198 INFO L225 Difference]: With dead ends: 8114 [2024-11-14 04:18:46,198 INFO L226 Difference]: Without dead ends: 4265 [2024-11-14 04:18:46,203 INFO L431 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 [2024-11-14 04:18:46,204 INFO L432 NwaCegarLoop]: 179 mSDtfsCounter, 83 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:18:46,204 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 260 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:18:46,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4265 states. [2024-11-14 04:18:46,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4265 to 4261. [2024-11-14 04:18:46,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4261 states, 4260 states have (on average 1.4105633802816901) internal successors, (6009), 4260 states have internal predecessors, (6009), 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) [2024-11-14 04:18:46,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4261 states to 4261 states and 6009 transitions. [2024-11-14 04:18:46,296 INFO L78 Accepts]: Start accepts. Automaton has 4261 states and 6009 transitions. Word has length 47 [2024-11-14 04:18:46,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:18:46,297 INFO L471 AbstractCegarLoop]: Abstraction has 4261 states and 6009 transitions. [2024-11-14 04:18:46,297 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2024-11-14 04:18:46,297 INFO L276 IsEmpty]: Start isEmpty. Operand 4261 states and 6009 transitions. [2024-11-14 04:18:46,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-14 04:18:46,300 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:18:46,300 INFO L215 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] [2024-11-14 04:18:46,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-14 04:18:46,300 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:18:46,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:18:46,301 INFO L85 PathProgramCache]: Analyzing trace with hash -120948155, now seen corresponding path program 1 times [2024-11-14 04:18:46,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:18:46,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158914010] [2024-11-14 04:18:46,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:18:46,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:18:46,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:18:46,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:18:46,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:18:46,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158914010] [2024-11-14 04:18:46,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158914010] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:18:46,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:18:46,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:18:46,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024447044] [2024-11-14 04:18:46,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:18:46,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:18:46,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:18:46,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:18:46,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:18:46,364 INFO L87 Difference]: Start difference. First operand 4261 states and 6009 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2024-11-14 04:18:46,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:18:46,434 INFO L93 Difference]: Finished difference Result 7555 states and 10705 transitions. [2024-11-14 04:18:46,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:18:46,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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 47 [2024-11-14 04:18:46,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:18:46,444 INFO L225 Difference]: With dead ends: 7555 [2024-11-14 04:18:46,444 INFO L226 Difference]: Without dead ends: 4028 [2024-11-14 04:18:46,483 INFO L431 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 [2024-11-14 04:18:46,483 INFO L432 NwaCegarLoop]: 175 mSDtfsCounter, 76 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:18:46,484 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 260 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:18:46,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4028 states. [2024-11-14 04:18:46,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4028 to 3934. [2024-11-14 04:18:46,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3934 states, 3933 states have (on average 1.4078311721332317) internal successors, (5537), 3933 states have internal predecessors, (5537), 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) [2024-11-14 04:18:46,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3934 states to 3934 states and 5537 transitions. [2024-11-14 04:18:46,560 INFO L78 Accepts]: Start accepts. Automaton has 3934 states and 5537 transitions. Word has length 47 [2024-11-14 04:18:46,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:18:46,560 INFO L471 AbstractCegarLoop]: Abstraction has 3934 states and 5537 transitions. [2024-11-14 04:18:46,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2024-11-14 04:18:46,561 INFO L276 IsEmpty]: Start isEmpty. Operand 3934 states and 5537 transitions. [2024-11-14 04:18:46,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-14 04:18:46,561 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:18:46,561 INFO L215 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] [2024-11-14 04:18:46,562 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-14 04:18:46,562 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:18:46,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:18:46,562 INFO L85 PathProgramCache]: Analyzing trace with hash -341736602, now seen corresponding path program 1 times [2024-11-14 04:18:46,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:18:46,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195148221] [2024-11-14 04:18:46,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:18:46,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:18:46,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:18:51,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:18:51,695 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:18:51,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195148221] [2024-11-14 04:18:51,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195148221] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:18:51,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:18:51,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2024-11-14 04:18:51,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300843732] [2024-11-14 04:18:51,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:18:51,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-14 04:18:51,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:18:51,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-14 04:18:51,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2024-11-14 04:18:51,697 INFO L87 Difference]: Start difference. First operand 3934 states and 5537 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:18:57,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:18:57,805 INFO L93 Difference]: Finished difference Result 5869 states and 8247 transitions. [2024-11-14 04:18:57,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-14 04:18:57,806 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2024-11-14 04:18:57,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:18:57,818 INFO L225 Difference]: With dead ends: 5869 [2024-11-14 04:18:57,819 INFO L226 Difference]: Without dead ends: 5163 [2024-11-14 04:18:57,821 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=671, Invalid=1981, Unknown=0, NotChecked=0, Total=2652 [2024-11-14 04:18:57,824 INFO L432 NwaCegarLoop]: 177 mSDtfsCounter, 459 mSDsluCounter, 1185 mSDsCounter, 0 mSdLazyCounter, 2219 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 1362 SdHoareTripleChecker+Invalid, 2226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 2219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:18:57,824 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 1362 Invalid, 2226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 2219 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-14 04:18:57,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5163 states. [2024-11-14 04:18:57,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5163 to 3912. [2024-11-14 04:18:57,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3912 states, 3911 states have (on average 1.4093582204039887) internal successors, (5512), 3911 states have internal predecessors, (5512), 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) [2024-11-14 04:18:57,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3912 states to 3912 states and 5512 transitions. [2024-11-14 04:18:57,936 INFO L78 Accepts]: Start accepts. Automaton has 3912 states and 5512 transitions. Word has length 48 [2024-11-14 04:18:57,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:18:57,937 INFO L471 AbstractCegarLoop]: Abstraction has 3912 states and 5512 transitions. [2024-11-14 04:18:57,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:18:57,937 INFO L276 IsEmpty]: Start isEmpty. Operand 3912 states and 5512 transitions. [2024-11-14 04:18:57,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-14 04:18:57,938 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:18:57,938 INFO L215 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] [2024-11-14 04:18:57,938 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-14 04:18:57,939 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:18:57,939 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:18:57,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1419949788, now seen corresponding path program 1 times [2024-11-14 04:18:57,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:18:57,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042336576] [2024-11-14 04:18:57,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:18:57,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:18:57,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:18:58,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:18:58,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:18:58,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042336576] [2024-11-14 04:18:58,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042336576] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:18:58,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:18:58,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:18:58,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855206033] [2024-11-14 04:18:58,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:18:58,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:18:58,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:18:58,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:18:58,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:18:58,094 INFO L87 Difference]: Start difference. First operand 3912 states and 5512 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2024-11-14 04:18:58,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:18:58,153 INFO L93 Difference]: Finished difference Result 7531 states and 10654 transitions. [2024-11-14 04:18:58,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:18:58,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 52 [2024-11-14 04:18:58,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:18:58,164 INFO L225 Difference]: With dead ends: 7531 [2024-11-14 04:18:58,165 INFO L226 Difference]: Without dead ends: 4774 [2024-11-14 04:18:58,168 INFO L431 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 [2024-11-14 04:18:58,169 INFO L432 NwaCegarLoop]: 185 mSDtfsCounter, 79 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:18:58,169 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 285 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:18:58,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4774 states. [2024-11-14 04:18:58,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4774 to 4430. [2024-11-14 04:18:58,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4430 states, 4429 states have (on average 1.400090313840596) internal successors, (6201), 4429 states have internal predecessors, (6201), 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) [2024-11-14 04:18:58,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4430 states to 4430 states and 6201 transitions. [2024-11-14 04:18:58,247 INFO L78 Accepts]: Start accepts. Automaton has 4430 states and 6201 transitions. Word has length 52 [2024-11-14 04:18:58,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:18:58,247 INFO L471 AbstractCegarLoop]: Abstraction has 4430 states and 6201 transitions. [2024-11-14 04:18:58,247 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2024-11-14 04:18:58,247 INFO L276 IsEmpty]: Start isEmpty. Operand 4430 states and 6201 transitions. [2024-11-14 04:18:58,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-14 04:18:58,249 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:18:58,249 INFO L215 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] [2024-11-14 04:18:58,249 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-14 04:18:58,249 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:18:58,249 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:18:58,249 INFO L85 PathProgramCache]: Analyzing trace with hash -802272727, now seen corresponding path program 1 times [2024-11-14 04:18:58,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:18:58,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440031280] [2024-11-14 04:18:58,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:18:58,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:18:58,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:18:58,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:18:58,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:18:58,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440031280] [2024-11-14 04:18:58,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440031280] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:18:58,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:18:58,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:18:58,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536305428] [2024-11-14 04:18:58,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:18:58,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:18:58,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:18:58,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:18:58,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:18:58,315 INFO L87 Difference]: Start difference. First operand 4430 states and 6201 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2024-11-14 04:18:58,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:18:58,372 INFO L93 Difference]: Finished difference Result 7276 states and 10190 transitions. [2024-11-14 04:18:58,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:18:58,373 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 55 [2024-11-14 04:18:58,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:18:58,381 INFO L225 Difference]: With dead ends: 7276 [2024-11-14 04:18:58,381 INFO L226 Difference]: Without dead ends: 3781 [2024-11-14 04:18:58,384 INFO L431 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 [2024-11-14 04:18:58,385 INFO L432 NwaCegarLoop]: 184 mSDtfsCounter, 70 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:18:58,385 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 289 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:18:58,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3781 states. [2024-11-14 04:18:58,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3781 to 3779. [2024-11-14 04:18:58,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3779 states, 3778 states have (on average 1.3795659078877713) internal successors, (5212), 3778 states have internal predecessors, (5212), 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) [2024-11-14 04:18:58,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3779 states to 3779 states and 5212 transitions. [2024-11-14 04:18:58,444 INFO L78 Accepts]: Start accepts. Automaton has 3779 states and 5212 transitions. Word has length 55 [2024-11-14 04:18:58,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:18:58,444 INFO L471 AbstractCegarLoop]: Abstraction has 3779 states and 5212 transitions. [2024-11-14 04:18:58,445 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2024-11-14 04:18:58,445 INFO L276 IsEmpty]: Start isEmpty. Operand 3779 states and 5212 transitions. [2024-11-14 04:18:58,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-14 04:18:58,446 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:18:58,446 INFO L215 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] [2024-11-14 04:18:58,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-14 04:18:58,446 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:18:58,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:18:58,447 INFO L85 PathProgramCache]: Analyzing trace with hash 171635273, now seen corresponding path program 1 times [2024-11-14 04:18:58,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:18:58,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852911254] [2024-11-14 04:18:58,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:18:58,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:18:58,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:18:58,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:18:58,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:18:58,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852911254] [2024-11-14 04:18:58,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852911254] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:18:58,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:18:58,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:18:58,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575712914] [2024-11-14 04:18:58,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:18:58,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:18:58,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:18:58,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:18:58,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:18:58,562 INFO L87 Difference]: Start difference. First operand 3779 states and 5212 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2024-11-14 04:18:58,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:18:58,618 INFO L93 Difference]: Finished difference Result 8373 states and 11630 transitions. [2024-11-14 04:18:58,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:18:58,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 55 [2024-11-14 04:18:58,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:18:58,629 INFO L225 Difference]: With dead ends: 8373 [2024-11-14 04:18:58,630 INFO L226 Difference]: Without dead ends: 5304 [2024-11-14 04:18:58,633 INFO L431 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 [2024-11-14 04:18:58,634 INFO L432 NwaCegarLoop]: 167 mSDtfsCounter, 75 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:18:58,634 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 268 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:18:58,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5304 states. [2024-11-14 04:18:58,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5304 to 4703. [2024-11-14 04:18:58,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4703 states, 4702 states have (on average 1.365801786473841) internal successors, (6422), 4702 states have internal predecessors, (6422), 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) [2024-11-14 04:18:58,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4703 states to 4703 states and 6422 transitions. [2024-11-14 04:18:58,715 INFO L78 Accepts]: Start accepts. Automaton has 4703 states and 6422 transitions. Word has length 55 [2024-11-14 04:18:58,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:18:58,715 INFO L471 AbstractCegarLoop]: Abstraction has 4703 states and 6422 transitions. [2024-11-14 04:18:58,715 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2024-11-14 04:18:58,715 INFO L276 IsEmpty]: Start isEmpty. Operand 4703 states and 6422 transitions. [2024-11-14 04:18:58,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-14 04:18:58,717 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:18:58,717 INFO L215 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] [2024-11-14 04:18:58,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-14 04:18:58,717 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:18:58,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:18:58,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1820630944, now seen corresponding path program 1 times [2024-11-14 04:18:58,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:18:58,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770553229] [2024-11-14 04:18:58,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:18:58,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:18:58,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:18:58,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:18:58,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:18:58,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770553229] [2024-11-14 04:18:58,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770553229] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:18:58,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:18:58,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:18:58,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443360136] [2024-11-14 04:18:58,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:18:58,782 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:18:58,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:18:58,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:18:58,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:18:58,783 INFO L87 Difference]: Start difference. First operand 4703 states and 6422 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2024-11-14 04:18:58,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:18:58,841 INFO L93 Difference]: Finished difference Result 6995 states and 9557 transitions. [2024-11-14 04:18:58,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:18:58,842 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 58 [2024-11-14 04:18:58,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:18:58,852 INFO L225 Difference]: With dead ends: 6995 [2024-11-14 04:18:58,852 INFO L226 Difference]: Without dead ends: 4971 [2024-11-14 04:18:58,855 INFO L431 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 [2024-11-14 04:18:58,856 INFO L432 NwaCegarLoop]: 190 mSDtfsCounter, 71 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:18:58,856 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 302 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:18:58,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4971 states. [2024-11-14 04:18:58,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4971 to 4969. [2024-11-14 04:18:58,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4969 states, 4968 states have (on average 1.3526570048309179) internal successors, (6720), 4968 states have internal predecessors, (6720), 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) [2024-11-14 04:18:58,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4969 states to 4969 states and 6720 transitions. [2024-11-14 04:18:58,977 INFO L78 Accepts]: Start accepts. Automaton has 4969 states and 6720 transitions. Word has length 58 [2024-11-14 04:18:58,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:18:58,978 INFO L471 AbstractCegarLoop]: Abstraction has 4969 states and 6720 transitions. [2024-11-14 04:18:58,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2024-11-14 04:18:58,978 INFO L276 IsEmpty]: Start isEmpty. Operand 4969 states and 6720 transitions. [2024-11-14 04:18:58,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-14 04:18:58,979 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:18:58,979 INFO L215 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] [2024-11-14 04:18:58,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-14 04:18:58,980 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:18:58,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:18:58,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1661236160, now seen corresponding path program 1 times [2024-11-14 04:18:58,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:18:58,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507585235] [2024-11-14 04:18:58,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:18:58,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:18:59,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:18:59,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:18:59,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:18:59,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507585235] [2024-11-14 04:18:59,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507585235] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:18:59,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:18:59,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:18:59,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419553867] [2024-11-14 04:18:59,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:18:59,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:18:59,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:18:59,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:18:59,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:18:59,096 INFO L87 Difference]: Start difference. First operand 4969 states and 6720 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2024-11-14 04:18:59,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:18:59,158 INFO L93 Difference]: Finished difference Result 11809 states and 16064 transitions. [2024-11-14 04:18:59,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:18:59,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 58 [2024-11-14 04:18:59,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:18:59,174 INFO L225 Difference]: With dead ends: 11809 [2024-11-14 04:18:59,174 INFO L226 Difference]: Without dead ends: 7199 [2024-11-14 04:18:59,181 INFO L431 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 [2024-11-14 04:18:59,181 INFO L432 NwaCegarLoop]: 148 mSDtfsCounter, 70 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:18:59,182 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 249 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:18:59,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7199 states. [2024-11-14 04:18:59,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7199 to 6525. [2024-11-14 04:18:59,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6525 states, 6524 states have (on average 1.3412017167381973) internal successors, (8750), 6524 states have internal predecessors, (8750), 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) [2024-11-14 04:18:59,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6525 states to 6525 states and 8750 transitions. [2024-11-14 04:18:59,297 INFO L78 Accepts]: Start accepts. Automaton has 6525 states and 8750 transitions. Word has length 58 [2024-11-14 04:18:59,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:18:59,297 INFO L471 AbstractCegarLoop]: Abstraction has 6525 states and 8750 transitions. [2024-11-14 04:18:59,297 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2024-11-14 04:18:59,297 INFO L276 IsEmpty]: Start isEmpty. Operand 6525 states and 8750 transitions. [2024-11-14 04:18:59,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-14 04:18:59,298 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:18:59,299 INFO L215 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] [2024-11-14 04:18:59,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-14 04:18:59,299 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:18:59,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:18:59,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1172321262, now seen corresponding path program 1 times [2024-11-14 04:18:59,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:18:59,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162425918] [2024-11-14 04:18:59,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:18:59,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:18:59,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:18:59,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:18:59,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:18:59,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162425918] [2024-11-14 04:18:59,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162425918] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:18:59,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:18:59,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 04:18:59,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705147852] [2024-11-14 04:18:59,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:18:59,498 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 04:18:59,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:18:59,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 04:18:59,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-14 04:18:59,499 INFO L87 Difference]: Start difference. First operand 6525 states and 8750 transitions. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 6 states have internal predecessors, (63), 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) [2024-11-14 04:18:59,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:18:59,874 INFO L93 Difference]: Finished difference Result 16689 states and 22421 transitions. [2024-11-14 04:18:59,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 04:18:59,874 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 6 states have internal predecessors, (63), 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 63 [2024-11-14 04:18:59,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:18:59,896 INFO L225 Difference]: With dead ends: 16689 [2024-11-14 04:18:59,896 INFO L226 Difference]: Without dead ends: 10355 [2024-11-14 04:18:59,902 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2024-11-14 04:18:59,903 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 819 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 819 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:18:59,903 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [819 Valid, 234 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:18:59,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10355 states. [2024-11-14 04:19:00,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10355 to 7746. [2024-11-14 04:19:00,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7746 states, 7745 states have (on average 1.31697869593286) internal successors, (10200), 7745 states have internal predecessors, (10200), 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) [2024-11-14 04:19:00,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7746 states to 7746 states and 10200 transitions. [2024-11-14 04:19:00,119 INFO L78 Accepts]: Start accepts. Automaton has 7746 states and 10200 transitions. Word has length 63 [2024-11-14 04:19:00,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:19:00,119 INFO L471 AbstractCegarLoop]: Abstraction has 7746 states and 10200 transitions. [2024-11-14 04:19:00,119 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 6 states have internal predecessors, (63), 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) [2024-11-14 04:19:00,119 INFO L276 IsEmpty]: Start isEmpty. Operand 7746 states and 10200 transitions. [2024-11-14 04:19:00,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-14 04:19:00,121 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:19:00,121 INFO L215 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] [2024-11-14 04:19:00,121 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-14 04:19:00,121 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:19:00,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:19:00,122 INFO L85 PathProgramCache]: Analyzing trace with hash 963141751, now seen corresponding path program 1 times [2024-11-14 04:19:00,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:19:00,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235231756] [2024-11-14 04:19:00,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:19:00,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:19:00,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:19:00,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:19:00,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:19:00,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235231756] [2024-11-14 04:19:00,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235231756] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:19:00,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:19:00,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-14 04:19:00,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981088889] [2024-11-14 04:19:00,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:19:00,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 04:19:00,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:19:00,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 04:19:00,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 04:19:00,477 INFO L87 Difference]: Start difference. First operand 7746 states and 10200 transitions. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 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) [2024-11-14 04:19:00,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:19:00,596 INFO L93 Difference]: Finished difference Result 9117 states and 12021 transitions. [2024-11-14 04:19:00,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 04:19:00,597 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 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 63 [2024-11-14 04:19:00,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:19:00,615 INFO L225 Difference]: With dead ends: 9117 [2024-11-14 04:19:00,615 INFO L226 Difference]: Without dead ends: 9115 [2024-11-14 04:19:00,618 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-14 04:19:00,619 INFO L432 NwaCegarLoop]: 124 mSDtfsCounter, 125 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:19:00,620 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 592 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:19:00,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9115 states. [2024-11-14 04:19:00,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9115 to 9115. [2024-11-14 04:19:00,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9115 states, 9114 states have (on average 1.3128154487601493) internal successors, (11965), 9114 states have internal predecessors, (11965), 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) [2024-11-14 04:19:00,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9115 states to 9115 states and 11965 transitions. [2024-11-14 04:19:00,767 INFO L78 Accepts]: Start accepts. Automaton has 9115 states and 11965 transitions. Word has length 63 [2024-11-14 04:19:00,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:19:00,767 INFO L471 AbstractCegarLoop]: Abstraction has 9115 states and 11965 transitions. [2024-11-14 04:19:00,768 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 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) [2024-11-14 04:19:00,768 INFO L276 IsEmpty]: Start isEmpty. Operand 9115 states and 11965 transitions. [2024-11-14 04:19:00,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-14 04:19:00,770 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:19:00,770 INFO L215 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] [2024-11-14 04:19:00,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-14 04:19:00,770 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:19:00,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:19:00,771 INFO L85 PathProgramCache]: Analyzing trace with hash 2127178825, now seen corresponding path program 1 times [2024-11-14 04:19:00,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:19:00,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117642296] [2024-11-14 04:19:00,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:19:00,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:19:00,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:19:02,893 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:19:02,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:19:02,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117642296] [2024-11-14 04:19:02,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117642296] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:19:02,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125018439] [2024-11-14 04:19:02,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:19:02,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:19:02,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:19:02,896 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:19:02,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 04:19:03,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:19:03,079 INFO L255 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-14 04:19:03,088 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:19:04,825 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 04:19:04,825 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:19:04,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125018439] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:19:04,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:19:04,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [23] total 36 [2024-11-14 04:19:04,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129615448] [2024-11-14 04:19:04,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:19:04,827 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-14 04:19:04,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:19:04,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-14 04:19:04,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2024-11-14 04:19:04,829 INFO L87 Difference]: Start difference. First operand 9115 states and 11965 transitions. Second operand has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 14 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) [2024-11-14 04:19:05,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:19:05,573 INFO L93 Difference]: Finished difference Result 15411 states and 20269 transitions. [2024-11-14 04:19:05,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-14 04:19:05,574 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 14 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 71 [2024-11-14 04:19:05,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:19:05,597 INFO L225 Difference]: With dead ends: 15411 [2024-11-14 04:19:05,597 INFO L226 Difference]: Without dead ends: 11264 [2024-11-14 04:19:05,603 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=188, Invalid=1372, Unknown=0, NotChecked=0, Total=1560 [2024-11-14 04:19:05,604 INFO L432 NwaCegarLoop]: 149 mSDtfsCounter, 404 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 04:19:05,604 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 741 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 04:19:05,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11264 states. [2024-11-14 04:19:05,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11264 to 9308. [2024-11-14 04:19:05,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9308 states, 9307 states have (on average 1.315783818631138) internal successors, (12246), 9307 states have internal predecessors, (12246), 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) [2024-11-14 04:19:05,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9308 states to 9308 states and 12246 transitions. [2024-11-14 04:19:05,745 INFO L78 Accepts]: Start accepts. Automaton has 9308 states and 12246 transitions. Word has length 71 [2024-11-14 04:19:05,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:19:05,745 INFO L471 AbstractCegarLoop]: Abstraction has 9308 states and 12246 transitions. [2024-11-14 04:19:05,745 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 14 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) [2024-11-14 04:19:05,745 INFO L276 IsEmpty]: Start isEmpty. Operand 9308 states and 12246 transitions. [2024-11-14 04:19:05,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-14 04:19:05,747 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:19:05,747 INFO L215 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] [2024-11-14 04:19:05,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 04:19:05,948 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-14 04:19:05,948 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:19:05,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:19:05,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1638566990, now seen corresponding path program 1 times [2024-11-14 04:19:05,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:19:05,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126406395] [2024-11-14 04:19:05,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:19:05,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:19:05,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:19:06,173 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 04:19:06,173 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:19:06,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126406395] [2024-11-14 04:19:06,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126406395] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:19:06,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:19:06,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 04:19:06,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392822422] [2024-11-14 04:19:06,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:19:06,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 04:19:06,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:19:06,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 04:19:06,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-14 04:19:06,175 INFO L87 Difference]: Start difference. First operand 9308 states and 12246 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 6 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) [2024-11-14 04:19:06,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:19:06,565 INFO L93 Difference]: Finished difference Result 25021 states and 33021 transitions. [2024-11-14 04:19:06,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 04:19:06,566 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 6 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 71 [2024-11-14 04:19:06,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:19:06,598 INFO L225 Difference]: With dead ends: 25021 [2024-11-14 04:19:06,598 INFO L226 Difference]: Without dead ends: 17060 [2024-11-14 04:19:06,607 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2024-11-14 04:19:06,609 INFO L432 NwaCegarLoop]: 84 mSDtfsCounter, 1004 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1004 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:19:06,610 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1004 Valid, 216 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:19:06,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17060 states. [2024-11-14 04:19:06,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17060 to 12328. [2024-11-14 04:19:06,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12328 states, 12327 states have (on average 1.3010464833292772) internal successors, (16038), 12327 states have internal predecessors, (16038), 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) [2024-11-14 04:19:06,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12328 states to 12328 states and 16038 transitions. [2024-11-14 04:19:06,865 INFO L78 Accepts]: Start accepts. Automaton has 12328 states and 16038 transitions. Word has length 71 [2024-11-14 04:19:06,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:19:06,865 INFO L471 AbstractCegarLoop]: Abstraction has 12328 states and 16038 transitions. [2024-11-14 04:19:06,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 6 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) [2024-11-14 04:19:06,866 INFO L276 IsEmpty]: Start isEmpty. Operand 12328 states and 16038 transitions. [2024-11-14 04:19:06,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-14 04:19:06,868 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:19:06,868 INFO L215 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] [2024-11-14 04:19:06,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-14 04:19:06,868 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:19:06,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:19:06,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1115535059, now seen corresponding path program 1 times [2024-11-14 04:19:06,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:19:06,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429314536] [2024-11-14 04:19:06,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:19:06,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:19:06,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:19:07,764 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:19:07,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:19:07,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429314536] [2024-11-14 04:19:07,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429314536] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:19:07,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908467771] [2024-11-14 04:19:07,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:19:07,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:19:07,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:19:07,767 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:19:07,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 04:19:07,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:19:07,937 INFO L255 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-14 04:19:07,943 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:19:09,790 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:19:09,790 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:19:16,293 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:19:16,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908467771] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:19:16,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1565233956] [2024-11-14 04:19:16,314 INFO L159 IcfgInterpreter]: Started Sifa with 65 locations of interest [2024-11-14 04:19:16,314 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:19:16,317 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:19:16,322 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:19:16,323 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:19:19,849 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:19:34,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1565233956] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:19:34,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:19:34,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [14, 19, 20] total 92 [2024-11-14 04:19:34,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033456486] [2024-11-14 04:19:34,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:19:34,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-14 04:19:34,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:19:34,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-14 04:19:34,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1154, Invalid=7218, Unknown=0, NotChecked=0, Total=8372 [2024-11-14 04:19:34,970 INFO L87 Difference]: Start difference. First operand 12328 states and 16038 transitions. Second operand has 45 states, 45 states have (on average 1.488888888888889) internal successors, (67), 44 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) [2024-11-14 04:19:39,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:19:39,847 INFO L93 Difference]: Finished difference Result 16712 states and 21763 transitions. [2024-11-14 04:19:39,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-14 04:19:39,847 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.488888888888889) internal successors, (67), 44 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 71 [2024-11-14 04:19:39,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:19:39,876 INFO L225 Difference]: With dead ends: 16712 [2024-11-14 04:19:39,876 INFO L226 Difference]: Without dead ends: 12305 [2024-11-14 04:19:39,883 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 134 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4257 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=1154, Invalid=7218, Unknown=0, NotChecked=0, Total=8372 [2024-11-14 04:19:39,883 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 13 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 3817 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 3820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 3817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-11-14 04:19:39,884 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 237 Invalid, 3820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 3817 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2024-11-14 04:19:39,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12305 states. [2024-11-14 04:19:40,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12305 to 12301. [2024-11-14 04:19:40,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12301 states, 12300 states have (on average 1.30130081300813) internal successors, (16006), 12300 states have internal predecessors, (16006), 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) [2024-11-14 04:19:40,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12301 states to 12301 states and 16006 transitions. [2024-11-14 04:19:40,042 INFO L78 Accepts]: Start accepts. Automaton has 12301 states and 16006 transitions. Word has length 71 [2024-11-14 04:19:40,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:19:40,043 INFO L471 AbstractCegarLoop]: Abstraction has 12301 states and 16006 transitions. [2024-11-14 04:19:40,043 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.488888888888889) internal successors, (67), 44 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) [2024-11-14 04:19:40,043 INFO L276 IsEmpty]: Start isEmpty. Operand 12301 states and 16006 transitions. [2024-11-14 04:19:40,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-14 04:19:40,045 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:19:40,045 INFO L215 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] [2024-11-14 04:19:40,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 04:19:40,246 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:19:40,247 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:19:40,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:19:40,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1548233591, now seen corresponding path program 1 times [2024-11-14 04:19:40,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:19:40,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012389273] [2024-11-14 04:19:40,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:19:40,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:19:40,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:19:41,077 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:19:41,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:19:41,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012389273] [2024-11-14 04:19:41,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012389273] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:19:41,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379869808] [2024-11-14 04:19:41,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:19:41,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:19:41,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:19:41,080 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:19:41,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 04:19:41,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:19:41,234 INFO L255 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-14 04:19:41,240 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:19:42,445 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:19:42,446 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:19:47,887 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:19:47,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379869808] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:19:47,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [735650500] [2024-11-14 04:19:47,890 INFO L159 IcfgInterpreter]: Started Sifa with 65 locations of interest [2024-11-14 04:19:47,890 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:19:47,891 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:19:47,891 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:19:47,891 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:19:49,021 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:19:59,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [735650500] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:19:59,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:19:59,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [14, 17, 18] total 78 [2024-11-14 04:19:59,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723551375] [2024-11-14 04:19:59,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:19:59,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-14 04:19:59,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:19:59,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-14 04:19:59,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=846, Invalid=5160, Unknown=0, NotChecked=0, Total=6006 [2024-11-14 04:19:59,793 INFO L87 Difference]: Start difference. First operand 12301 states and 16006 transitions. Second operand has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 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) [2024-11-14 04:20:03,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:20:03,318 INFO L93 Difference]: Finished difference Result 17039 states and 22211 transitions. [2024-11-14 04:20:03,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-14 04:20:03,318 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 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 71 [2024-11-14 04:20:03,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:20:03,340 INFO L225 Difference]: With dead ends: 17039 [2024-11-14 04:20:03,340 INFO L226 Difference]: Without dead ends: 12266 [2024-11-14 04:20:03,346 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 149 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2900 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=846, Invalid=5160, Unknown=0, NotChecked=0, Total=6006 [2024-11-14 04:20:03,347 INFO L432 NwaCegarLoop]: 91 mSDtfsCounter, 9 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2584 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 2585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:20:03,347 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 174 Invalid, 2585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2584 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2024-11-14 04:20:03,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12266 states. [2024-11-14 04:20:03,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12266 to 12266. [2024-11-14 04:20:03,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12266 states, 12265 states have (on average 1.3014268242967795) internal successors, (15962), 12265 states have internal predecessors, (15962), 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) [2024-11-14 04:20:03,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12266 states to 12266 states and 15962 transitions. [2024-11-14 04:20:03,502 INFO L78 Accepts]: Start accepts. Automaton has 12266 states and 15962 transitions. Word has length 71 [2024-11-14 04:20:03,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:20:03,502 INFO L471 AbstractCegarLoop]: Abstraction has 12266 states and 15962 transitions. [2024-11-14 04:20:03,502 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 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) [2024-11-14 04:20:03,502 INFO L276 IsEmpty]: Start isEmpty. Operand 12266 states and 15962 transitions. [2024-11-14 04:20:03,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-14 04:20:03,504 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:20:03,504 INFO L215 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] [2024-11-14 04:20:03,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 04:20:03,705 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:03,705 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:20:03,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:20:03,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1962551003, now seen corresponding path program 1 times [2024-11-14 04:20:03,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:20:03,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17484169] [2024-11-14 04:20:03,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:03,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:20:03,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:04,986 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:20:04,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:20:04,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17484169] [2024-11-14 04:20:04,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17484169] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:20:04,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183000755] [2024-11-14 04:20:04,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:04,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:04,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:20:04,989 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:20:04,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 04:20:05,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:05,163 INFO L255 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-14 04:20:05,167 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:20:06,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:20:06,552 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:20:12,254 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:20:12,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183000755] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:20:12,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [967989089] [2024-11-14 04:20:12,272 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2024-11-14 04:20:12,272 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:20:12,272 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:20:12,272 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:20:12,272 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:20:15,264 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:20:30,132 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '327508#(and (or (= ~__return_6532~0 1) (= ~__return_6532~0 0)) (exists ((|v_ULTIMATE.start_main_~assert__arg~2#1_25| Int)) (= (mod |v_ULTIMATE.start_main_~assert__arg~2#1_25| 256) 0)))' at error location [2024-11-14 04:20:30,133 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:20:30,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:20:30,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 17] total 49 [2024-11-14 04:20:30,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403824990] [2024-11-14 04:20:30,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:20:30,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-14 04:20:30,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:20:30,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-14 04:20:30,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1258, Invalid=8842, Unknown=0, NotChecked=0, Total=10100 [2024-11-14 04:20:30,137 INFO L87 Difference]: Start difference. First operand 12266 states and 15962 transitions. Second operand has 49 states, 49 states have (on average 4.387755102040816) internal successors, (215), 49 states have internal predecessors, (215), 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) [2024-11-14 04:20:37,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:20:37,046 INFO L93 Difference]: Finished difference Result 36090 states and 46911 transitions. [2024-11-14 04:20:37,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-11-14 04:20:37,047 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.387755102040816) internal successors, (215), 49 states have internal predecessors, (215), 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 74 [2024-11-14 04:20:37,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:20:37,079 INFO L225 Difference]: With dead ends: 36090 [2024-11-14 04:20:37,079 INFO L226 Difference]: Without dead ends: 32312 [2024-11-14 04:20:37,092 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 9913 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=2755, Invalid=22685, Unknown=0, NotChecked=0, Total=25440 [2024-11-14 04:20:37,093 INFO L432 NwaCegarLoop]: 203 mSDtfsCounter, 2046 mSDsluCounter, 3290 mSDsCounter, 0 mSdLazyCounter, 3229 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2046 SdHoareTripleChecker+Valid, 3493 SdHoareTripleChecker+Invalid, 3396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 3229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-14 04:20:37,093 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2046 Valid, 3493 Invalid, 3396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 3229 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-14 04:20:37,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32312 states. [2024-11-14 04:20:37,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32312 to 17112. [2024-11-14 04:20:37,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17112 states, 17111 states have (on average 1.2758459470516041) internal successors, (21831), 17111 states have internal predecessors, (21831), 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) [2024-11-14 04:20:37,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17112 states to 17112 states and 21831 transitions. [2024-11-14 04:20:37,484 INFO L78 Accepts]: Start accepts. Automaton has 17112 states and 21831 transitions. Word has length 74 [2024-11-14 04:20:37,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:20:37,484 INFO L471 AbstractCegarLoop]: Abstraction has 17112 states and 21831 transitions. [2024-11-14 04:20:37,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.387755102040816) internal successors, (215), 49 states have internal predecessors, (215), 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) [2024-11-14 04:20:37,485 INFO L276 IsEmpty]: Start isEmpty. Operand 17112 states and 21831 transitions. [2024-11-14 04:20:37,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-14 04:20:37,487 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:20:37,487 INFO L215 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] [2024-11-14 04:20:37,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 04:20:37,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:37,688 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:20:37,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:20:37,689 INFO L85 PathProgramCache]: Analyzing trace with hash -2042150063, now seen corresponding path program 1 times [2024-11-14 04:20:37,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:20:37,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149234585] [2024-11-14 04:20:37,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:37,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:20:37,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:38,567 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:20:38,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:20:38,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149234585] [2024-11-14 04:20:38,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149234585] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:20:38,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971563968] [2024-11-14 04:20:38,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:38,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:38,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:20:38,570 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:20:38,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 04:20:38,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:38,738 INFO L255 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 04:20:38,740 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:20:39,154 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 04:20:39,154 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:20:39,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971563968] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:20:39,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:20:39,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [15] total 20 [2024-11-14 04:20:39,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628089177] [2024-11-14 04:20:39,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:20:39,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 04:20:39,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:20:39,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 04:20:39,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-11-14 04:20:39,156 INFO L87 Difference]: Start difference. First operand 17112 states and 21831 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 6 states have internal predecessors, (72), 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) [2024-11-14 04:20:39,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:20:39,405 INFO L93 Difference]: Finished difference Result 36555 states and 46794 transitions. [2024-11-14 04:20:39,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 04:20:39,405 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 6 states have internal predecessors, (72), 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 74 [2024-11-14 04:20:39,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:20:39,431 INFO L225 Difference]: With dead ends: 36555 [2024-11-14 04:20:39,432 INFO L226 Difference]: Without dead ends: 19771 [2024-11-14 04:20:39,443 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2024-11-14 04:20:39,443 INFO L432 NwaCegarLoop]: 121 mSDtfsCounter, 326 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:20:39,444 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 275 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:20:39,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19771 states. [2024-11-14 04:20:39,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19771 to 16961. [2024-11-14 04:20:39,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16961 states, 16960 states have (on average 1.262441037735849) internal successors, (21411), 16960 states have internal predecessors, (21411), 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) [2024-11-14 04:20:39,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16961 states to 16961 states and 21411 transitions. [2024-11-14 04:20:39,791 INFO L78 Accepts]: Start accepts. Automaton has 16961 states and 21411 transitions. Word has length 74 [2024-11-14 04:20:39,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:20:39,791 INFO L471 AbstractCegarLoop]: Abstraction has 16961 states and 21411 transitions. [2024-11-14 04:20:39,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 6 states have internal predecessors, (72), 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) [2024-11-14 04:20:39,792 INFO L276 IsEmpty]: Start isEmpty. Operand 16961 states and 21411 transitions. [2024-11-14 04:20:39,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-14 04:20:39,793 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:20:39,793 INFO L215 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] [2024-11-14 04:20:39,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-14 04:20:39,994 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:39,994 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:20:39,995 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:20:39,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1176617674, now seen corresponding path program 1 times [2024-11-14 04:20:39,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:20:39,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604221974] [2024-11-14 04:20:39,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:39,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:20:40,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:40,944 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:20:40,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:20:40,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604221974] [2024-11-14 04:20:40,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604221974] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:20:40,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85838970] [2024-11-14 04:20:40,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:40,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:40,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:20:40,947 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:20:40,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 04:20:41,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:41,124 INFO L255 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-14 04:20:41,130 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:20:41,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:20:41,801 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:20:46,799 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:20:46,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85838970] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:20:46,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1217056152] [2024-11-14 04:20:46,801 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2024-11-14 04:20:46,801 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:20:46,802 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:20:46,802 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:20:46,802 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:20:51,976 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:21:09,549 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '435111#(and (or (and (<= 3 (mod ~r1~0 256)) (not (= (+ ~st3~0 ~st2~0 ~st1~0) 1))) (< 1 (+ ~st3~0 ~st2~0 ~st1~0))) (= ~nomsg~0 ~p1_new~0) (<= 0 ~mode3~0) (exists ((|v_ULTIMATE.start_main_~__tmp_3~0#1_5| Int) (|v_ULTIMATE.start_main_~assert__arg~2#1_32| Int)) (and (= |v_ULTIMATE.start_main_~__tmp_3~0#1_5| 0) (= 0 |v_ULTIMATE.start_main_~assert__arg~2#1_32|) (= ~__return_6532~0 0))) (= ~p3_new~0 ~nomsg~0) (<= ~mode2~0 1) (<= ~mode3~0 1) (= ~nomsg~0 ~p2_new~0) (<= 0 ~mode2~0))' at error location [2024-11-14 04:21:09,549 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:21:09,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:21:09,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 17] total 36 [2024-11-14 04:21:09,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174047004] [2024-11-14 04:21:09,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:21:09,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-14 04:21:09,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:21:09,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-14 04:21:09,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=918, Invalid=6738, Unknown=0, NotChecked=0, Total=7656 [2024-11-14 04:21:09,553 INFO L87 Difference]: Start difference. First operand 16961 states and 21411 transitions. Second operand has 36 states, 36 states have (on average 4.75) internal successors, (171), 36 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) [2024-11-14 04:21:14,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:21:14,268 INFO L93 Difference]: Finished difference Result 36141 states and 46244 transitions. [2024-11-14 04:21:14,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-14 04:21:14,268 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.75) internal successors, (171), 36 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 74 [2024-11-14 04:21:14,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:21:14,299 INFO L225 Difference]: With dead ends: 36141 [2024-11-14 04:21:14,299 INFO L226 Difference]: Without dead ends: 33055 [2024-11-14 04:21:14,309 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 147 SyntacticMatches, 4 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6925 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=1745, Invalid=14767, Unknown=0, NotChecked=0, Total=16512 [2024-11-14 04:21:14,309 INFO L432 NwaCegarLoop]: 219 mSDtfsCounter, 1509 mSDsluCounter, 3173 mSDsCounter, 0 mSdLazyCounter, 2249 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1509 SdHoareTripleChecker+Valid, 3392 SdHoareTripleChecker+Invalid, 2366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 2249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:21:14,309 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1509 Valid, 3392 Invalid, 2366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 2249 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-14 04:21:14,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33055 states. [2024-11-14 04:21:14,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33055 to 18457. [2024-11-14 04:21:14,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18457 states, 18456 states have (on average 1.2593736454269615) internal successors, (23243), 18456 states have internal predecessors, (23243), 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) [2024-11-14 04:21:14,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18457 states to 18457 states and 23243 transitions. [2024-11-14 04:21:14,693 INFO L78 Accepts]: Start accepts. Automaton has 18457 states and 23243 transitions. Word has length 74 [2024-11-14 04:21:14,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:21:14,694 INFO L471 AbstractCegarLoop]: Abstraction has 18457 states and 23243 transitions. [2024-11-14 04:21:14,694 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.75) internal successors, (171), 36 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) [2024-11-14 04:21:14,694 INFO L276 IsEmpty]: Start isEmpty. Operand 18457 states and 23243 transitions. [2024-11-14 04:21:14,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-14 04:21:14,696 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:21:14,697 INFO L215 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] [2024-11-14 04:21:14,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 04:21:14,901 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-14 04:21:14,901 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:21:14,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:21:14,902 INFO L85 PathProgramCache]: Analyzing trace with hash 746115970, now seen corresponding path program 1 times [2024-11-14 04:21:14,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:21:14,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893463971] [2024-11-14 04:21:14,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:21:14,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:21:14,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:21:16,074 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:21:16,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:21:16,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893463971] [2024-11-14 04:21:16,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893463971] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:21:16,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557187354] [2024-11-14 04:21:16,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:21:16,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:21:16,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:21:16,077 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:21:16,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 04:21:16,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:21:16,271 INFO L255 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-14 04:21:16,275 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:21:17,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:21:17,608 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:21:23,756 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:21:23,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557187354] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:21:23,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1171436185] [2024-11-14 04:21:23,758 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2024-11-14 04:21:23,758 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:21:23,758 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:21:23,759 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:21:23,759 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:21:27,091 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:21:42,009 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '490333#(and (or (and (<= 3 (mod ~r1~0 256)) (not (= (+ ~st3~0 ~st2~0 ~st1~0) 1))) (< 1 (+ ~st3~0 ~st2~0 ~st1~0))) (= ~nomsg~0 ~p1_new~0) (<= 0 ~mode3~0) (= ~p3_new~0 ~nomsg~0) (<= ~mode3~0 1) (exists ((|v_ULTIMATE.start_main_~assert__arg~2#1_40| Int) (|v_ULTIMATE.start_main_~__tmp_3~0#1_5| Int)) (and (= |v_ULTIMATE.start_main_~__tmp_3~0#1_5| 0) (= 0 |v_ULTIMATE.start_main_~assert__arg~2#1_40|) (= ~__return_6532~0 0))) (= ~nomsg~0 ~p2_new~0))' at error location [2024-11-14 04:21:42,010 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:21:42,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:21:42,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 19] total 52 [2024-11-14 04:21:42,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651366685] [2024-11-14 04:21:42,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:21:42,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-14 04:21:42,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:21:42,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-14 04:21:42,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=8922, Unknown=0, NotChecked=0, Total=10100 [2024-11-14 04:21:42,012 INFO L87 Difference]: Start difference. First operand 18457 states and 23243 transitions. Second operand has 52 states, 52 states have (on average 4.211538461538462) internal successors, (219), 52 states have internal predecessors, (219), 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) [2024-11-14 04:22:33,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:22:33,063 INFO L93 Difference]: Finished difference Result 71242 states and 90535 transitions. [2024-11-14 04:22:33,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 205 states. [2024-11-14 04:22:33,064 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 4.211538461538462) internal successors, (219), 52 states have internal predecessors, (219), 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 74 [2024-11-14 04:22:33,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:22:33,120 INFO L225 Difference]: With dead ends: 71242 [2024-11-14 04:22:33,120 INFO L226 Difference]: Without dead ends: 66577 [2024-11-14 04:22:33,137 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 138 SyntacticMatches, 4 SemanticMatches, 300 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37276 ImplicationChecksByTransitivity, 59.2s TimeCoverageRelationStatistics Valid=8702, Invalid=82200, Unknown=0, NotChecked=0, Total=90902 [2024-11-14 04:22:33,137 INFO L432 NwaCegarLoop]: 324 mSDtfsCounter, 3085 mSDsluCounter, 4471 mSDsCounter, 0 mSdLazyCounter, 6891 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3085 SdHoareTripleChecker+Valid, 4795 SdHoareTripleChecker+Invalid, 7156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 6891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2024-11-14 04:22:33,138 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3085 Valid, 4795 Invalid, 7156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 6891 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2024-11-14 04:22:33,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66577 states. [2024-11-14 04:22:33,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66577 to 51132. [2024-11-14 04:22:33,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51132 states, 51131 states have (on average 1.2633822925426845) internal successors, (64598), 51131 states have internal predecessors, (64598), 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) [2024-11-14 04:22:33,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51132 states to 51132 states and 64598 transitions. [2024-11-14 04:22:33,866 INFO L78 Accepts]: Start accepts. Automaton has 51132 states and 64598 transitions. Word has length 74 [2024-11-14 04:22:33,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:22:33,866 INFO L471 AbstractCegarLoop]: Abstraction has 51132 states and 64598 transitions. [2024-11-14 04:22:33,866 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 4.211538461538462) internal successors, (219), 52 states have internal predecessors, (219), 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) [2024-11-14 04:22:33,866 INFO L276 IsEmpty]: Start isEmpty. Operand 51132 states and 64598 transitions. [2024-11-14 04:22:33,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-14 04:22:33,868 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:22:33,868 INFO L215 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] [2024-11-14 04:22:33,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 04:22:34,068 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-14 04:22:34,069 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:22:34,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:22:34,070 INFO L85 PathProgramCache]: Analyzing trace with hash -953850484, now seen corresponding path program 1 times [2024-11-14 04:22:34,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:22:34,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710379319] [2024-11-14 04:22:34,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:22:34,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:22:34,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:22:34,321 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 04:22:34,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:22:34,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710379319] [2024-11-14 04:22:34,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710379319] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:22:34,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:22:34,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 04:22:34,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487201823] [2024-11-14 04:22:34,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:22:34,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 04:22:34,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:22:34,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 04:22:34,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-14 04:22:34,323 INFO L87 Difference]: Start difference. First operand 51132 states and 64598 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 6 states have internal predecessors, (72), 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) [2024-11-14 04:22:34,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:22:34,712 INFO L93 Difference]: Finished difference Result 67830 states and 85762 transitions. [2024-11-14 04:22:34,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 04:22:34,712 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 6 states have internal predecessors, (72), 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 75 [2024-11-14 04:22:34,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:22:34,771 INFO L225 Difference]: With dead ends: 67830 [2024-11-14 04:22:34,771 INFO L226 Difference]: Without dead ends: 61560 [2024-11-14 04:22:34,786 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-11-14 04:22:34,786 INFO L432 NwaCegarLoop]: 102 mSDtfsCounter, 454 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:22:34,786 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 250 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:22:34,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61560 states. [2024-11-14 04:22:35,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61560 to 61556. [2024-11-14 04:22:35,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61556 states, 61555 states have (on average 1.2571683859962635) internal successors, (77385), 61555 states have internal predecessors, (77385), 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) [2024-11-14 04:22:35,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61556 states to 61556 states and 77385 transitions. [2024-11-14 04:22:35,695 INFO L78 Accepts]: Start accepts. Automaton has 61556 states and 77385 transitions. Word has length 75 [2024-11-14 04:22:35,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:22:35,695 INFO L471 AbstractCegarLoop]: Abstraction has 61556 states and 77385 transitions. [2024-11-14 04:22:35,695 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 6 states have internal predecessors, (72), 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) [2024-11-14 04:22:35,695 INFO L276 IsEmpty]: Start isEmpty. Operand 61556 states and 77385 transitions. [2024-11-14 04:22:35,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-14 04:22:35,697 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:22:35,698 INFO L215 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] [2024-11-14 04:22:35,698 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-11-14 04:22:35,698 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:22:35,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:22:35,698 INFO L85 PathProgramCache]: Analyzing trace with hash -430818553, now seen corresponding path program 1 times [2024-11-14 04:22:35,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:22:35,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381673517] [2024-11-14 04:22:35,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:22:35,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:22:35,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:22:37,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:22:37,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:22:37,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381673517] [2024-11-14 04:22:37,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381673517] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:22:37,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220465385] [2024-11-14 04:22:37,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:22:37,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:22:37,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:22:37,168 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:22:37,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 04:22:37,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:22:37,349 INFO L255 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-14 04:22:37,352 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:22:39,401 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:22:39,401 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:22:57,811 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:22:57,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220465385] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:22:57,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1116948479] [2024-11-14 04:22:57,813 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2024-11-14 04:22:57,813 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:22:57,813 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:22:57,813 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:22:57,814 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:23:01,384 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:23:20,958 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '743061#(and (or (and (<= 3 (mod ~r1~0 256)) (not (= (+ ~st3~0 ~st2~0 ~st1~0) 1))) (< 1 (+ ~st3~0 ~st2~0 ~st1~0))) (= ~nomsg~0 ~p1_new~0) (<= 0 ~mode3~0) (= ~p3_new~0 ~nomsg~0) (<= ~mode2~0 1) (<= ~mode3~0 1) (= ~nomsg~0 ~p2_new~0) (<= 0 ~mode2~0) (exists ((|v_ULTIMATE.start_main_~assert__arg~2#1_48| Int) (|v_ULTIMATE.start_main_~__tmp_3~0#1_5| Int)) (and (= |v_ULTIMATE.start_main_~__tmp_3~0#1_5| 0) (= 0 |v_ULTIMATE.start_main_~assert__arg~2#1_48|) (= ~__return_6532~0 0))))' at error location [2024-11-14 04:23:20,958 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:23:20,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:23:20,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22, 23] total 60 [2024-11-14 04:23:20,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017128463] [2024-11-14 04:23:20,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:23:20,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-14 04:23:20,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:23:20,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-14 04:23:20,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1417, Invalid=11015, Unknown=0, NotChecked=0, Total=12432 [2024-11-14 04:23:20,961 INFO L87 Difference]: Start difference. First operand 61556 states and 77385 transitions. Second operand has 60 states, 60 states have (on average 3.7) internal successors, (222), 60 states have internal predecessors, (222), 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) [2024-11-14 04:25:33,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:25:33,481 INFO L93 Difference]: Finished difference Result 155160 states and 194457 transitions. [2024-11-14 04:25:33,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 250 states. [2024-11-14 04:25:33,482 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.7) internal successors, (222), 60 states have internal predecessors, (222), 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 75 [2024-11-14 04:25:33,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:25:33,648 INFO L225 Difference]: With dead ends: 155160 [2024-11-14 04:25:33,648 INFO L226 Difference]: Without dead ends: 145285 [2024-11-14 04:25:33,678 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 129 SyntacticMatches, 4 SemanticMatches, 350 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52390 ImplicationChecksByTransitivity, 141.0s TimeCoverageRelationStatistics Valid=13990, Invalid=109562, Unknown=0, NotChecked=0, Total=123552 [2024-11-14 04:25:33,679 INFO L432 NwaCegarLoop]: 318 mSDtfsCounter, 4441 mSDsluCounter, 5117 mSDsCounter, 0 mSdLazyCounter, 10591 mSolverCounterSat, 433 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4441 SdHoareTripleChecker+Valid, 5435 SdHoareTripleChecker+Invalid, 11024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 433 IncrementalHoareTripleChecker+Valid, 10591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2024-11-14 04:25:33,679 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4441 Valid, 5435 Invalid, 11024 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [433 Valid, 10591 Invalid, 0 Unknown, 0 Unchecked, 12.9s Time] [2024-11-14 04:25:33,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145285 states. [2024-11-14 04:25:35,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145285 to 82719. [2024-11-14 04:25:35,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82719 states, 82718 states have (on average 1.2496312773519669) internal successors, (103367), 82718 states have internal predecessors, (103367), 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) [2024-11-14 04:25:35,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82719 states to 82719 states and 103367 transitions. [2024-11-14 04:25:35,521 INFO L78 Accepts]: Start accepts. Automaton has 82719 states and 103367 transitions. Word has length 75 [2024-11-14 04:25:35,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:25:35,521 INFO L471 AbstractCegarLoop]: Abstraction has 82719 states and 103367 transitions. [2024-11-14 04:25:35,522 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.7) internal successors, (222), 60 states have internal predecessors, (222), 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) [2024-11-14 04:25:35,522 INFO L276 IsEmpty]: Start isEmpty. Operand 82719 states and 103367 transitions. [2024-11-14 04:25:35,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-14 04:25:35,524 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:25:35,524 INFO L215 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] [2024-11-14 04:25:35,547 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 04:25:35,724 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:25:35,724 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:25:35,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:25:35,727 INFO L85 PathProgramCache]: Analyzing trace with hash 782640190, now seen corresponding path program 1 times [2024-11-14 04:25:35,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:25:35,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296324849] [2024-11-14 04:25:35,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:25:35,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:25:35,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:25:36,007 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 04:25:36,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:25:36,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296324849] [2024-11-14 04:25:36,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296324849] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:25:36,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:25:36,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 04:25:36,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223251763] [2024-11-14 04:25:36,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:25:36,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 04:25:36,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:25:36,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 04:25:36,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-14 04:25:36,009 INFO L87 Difference]: Start difference. First operand 82719 states and 103367 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 6 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) [2024-11-14 04:25:36,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:25:36,542 INFO L93 Difference]: Finished difference Result 107329 states and 134405 transitions. [2024-11-14 04:25:36,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 04:25:36,542 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 6 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) Word has length 75 [2024-11-14 04:25:36,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:25:36,670 INFO L225 Difference]: With dead ends: 107329 [2024-11-14 04:25:36,670 INFO L226 Difference]: Without dead ends: 99732 [2024-11-14 04:25:36,695 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-11-14 04:25:36,695 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 488 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:25:36,696 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [488 Valid, 238 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:25:36,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99732 states. [2024-11-14 04:25:38,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99732 to 99261. [2024-11-14 04:25:38,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99261 states, 99260 states have (on average 1.2463429377392705) internal successors, (123712), 99260 states have internal predecessors, (123712), 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) [2024-11-14 04:25:38,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99261 states to 99261 states and 123712 transitions. [2024-11-14 04:25:38,935 INFO L78 Accepts]: Start accepts. Automaton has 99261 states and 123712 transitions. Word has length 75 [2024-11-14 04:25:38,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:25:38,935 INFO L471 AbstractCegarLoop]: Abstraction has 99261 states and 123712 transitions. [2024-11-14 04:25:38,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 6 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) [2024-11-14 04:25:38,936 INFO L276 IsEmpty]: Start isEmpty. Operand 99261 states and 123712 transitions. [2024-11-14 04:25:38,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-14 04:25:38,938 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:25:38,938 INFO L215 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] [2024-11-14 04:25:38,938 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-11-14 04:25:38,938 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:25:38,939 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:25:38,939 INFO L85 PathProgramCache]: Analyzing trace with hash 696270435, now seen corresponding path program 1 times [2024-11-14 04:25:38,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:25:38,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043343275] [2024-11-14 04:25:38,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:25:38,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:25:39,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:25:41,623 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:25:41,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:25:41,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043343275] [2024-11-14 04:25:41,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043343275] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:25:41,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274643704] [2024-11-14 04:25:41,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:25:41,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:25:41,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:25:41,626 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:25:41,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 04:25:41,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:25:41,870 INFO L255 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-14 04:25:41,875 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:25:44,088 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:25:44,088 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:26:10,284 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:26:10,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274643704] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:26:10,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [253919713] [2024-11-14 04:26:10,288 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2024-11-14 04:26:10,289 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:26:10,289 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:26:10,289 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:26:10,289 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:26:16,355 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:26:41,314 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1188573#(and (or (and (<= 3 (mod ~r1~0 256)) (not (= (+ ~st3~0 ~st2~0 ~st1~0) 1))) (< 1 (+ ~st3~0 ~st2~0 ~st1~0))) (= ~nomsg~0 ~p1_new~0) (exists ((|v_ULTIMATE.start_main_~__tmp_3~0#1_5| Int) (|v_ULTIMATE.start_main_~assert__arg~2#1_56| Int)) (and (= |v_ULTIMATE.start_main_~__tmp_3~0#1_5| 0) (= ~__return_6532~0 0) (= 0 |v_ULTIMATE.start_main_~assert__arg~2#1_56|))) (<= 0 ~mode3~0) (= ~p3_new~0 ~nomsg~0) (<= ~mode3~0 1) (= ~nomsg~0 ~p2_new~0))' at error location [2024-11-14 04:26:41,315 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:26:41,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:26:41,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 22] total 54 [2024-11-14 04:26:41,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271956884] [2024-11-14 04:26:41,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:26:41,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-14 04:26:41,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:26:41,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-14 04:26:41,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1367, Invalid=9975, Unknown=0, NotChecked=0, Total=11342 [2024-11-14 04:26:41,332 INFO L87 Difference]: Start difference. First operand 99261 states and 123712 transitions. Second operand has 54 states, 54 states have (on average 3.888888888888889) internal successors, (210), 54 states have internal predecessors, (210), 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) [2024-11-14 04:27:32,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:27:32,605 INFO L93 Difference]: Finished difference Result 269828 states and 336088 transitions. [2024-11-14 04:27:32,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 217 states. [2024-11-14 04:27:32,607 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.888888888888889) internal successors, (210), 54 states have internal predecessors, (210), 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 75 [2024-11-14 04:27:32,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:27:33,531 INFO L225 Difference]: With dead ends: 269828 [2024-11-14 04:27:33,531 INFO L226 Difference]: Without dead ends: 243824 [2024-11-14 04:27:33,621 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 135 SyntacticMatches, 4 SemanticMatches, 300 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39752 ImplicationChecksByTransitivity, 68.8s TimeCoverageRelationStatistics Valid=8285, Invalid=82617, Unknown=0, NotChecked=0, Total=90902 [2024-11-14 04:27:33,622 INFO L432 NwaCegarLoop]: 205 mSDtfsCounter, 3771 mSDsluCounter, 3840 mSDsCounter, 0 mSdLazyCounter, 6382 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3771 SdHoareTripleChecker+Valid, 4045 SdHoareTripleChecker+Invalid, 6739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 6382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2024-11-14 04:27:33,627 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3771 Valid, 4045 Invalid, 6739 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [357 Valid, 6382 Invalid, 0 Unknown, 0 Unchecked, 9.9s Time] [2024-11-14 04:27:33,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243824 states. [2024-11-14 04:27:38,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243824 to 105510. [2024-11-14 04:27:38,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105510 states, 105509 states have (on average 1.2451449639367258) internal successors, (131374), 105509 states have internal predecessors, (131374), 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) [2024-11-14 04:27:39,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105510 states to 105510 states and 131374 transitions. [2024-11-14 04:27:39,360 INFO L78 Accepts]: Start accepts. Automaton has 105510 states and 131374 transitions. Word has length 75 [2024-11-14 04:27:39,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:27:39,363 INFO L471 AbstractCegarLoop]: Abstraction has 105510 states and 131374 transitions. [2024-11-14 04:27:39,363 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.888888888888889) internal successors, (210), 54 states have internal predecessors, (210), 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) [2024-11-14 04:27:39,364 INFO L276 IsEmpty]: Start isEmpty. Operand 105510 states and 131374 transitions. [2024-11-14 04:27:39,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-14 04:27:39,373 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:27:39,374 INFO L215 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] [2024-11-14 04:27:39,401 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 04:27:39,574 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:27:39,580 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:27:39,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:27:39,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1986865735, now seen corresponding path program 1 times [2024-11-14 04:27:39,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:27:39,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745449275] [2024-11-14 04:27:39,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:27:39,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:27:40,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:27:43,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:27:43,772 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:27:43,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745449275] [2024-11-14 04:27:43,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745449275] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:27:43,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063104364] [2024-11-14 04:27:43,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:27:43,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:27:43,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:27:43,776 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:27:43,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 04:27:44,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:27:44,099 INFO L255 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-14 04:27:44,116 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:27:51,010 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:27:51,011 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:30:15,155 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:30:15,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063104364] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:30:15,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1855165364] [2024-11-14 04:30:15,157 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2024-11-14 04:30:15,157 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:30:15,158 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:30:15,158 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:30:15,158 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:30:16,931 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:30:34,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1855165364] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:30:34,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:30:34,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [20, 25, 25] total 102 [2024-11-14 04:30:34,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518899211] [2024-11-14 04:30:34,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:30:34,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-14 04:30:34,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:30:34,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-14 04:30:34,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1279, Invalid=9023, Unknown=0, NotChecked=0, Total=10302 [2024-11-14 04:30:34,561 INFO L87 Difference]: Start difference. First operand 105510 states and 131374 transitions. Second operand has 38 states, 38 states have (on average 1.868421052631579) internal successors, (71), 37 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) [2024-11-14 04:30:39,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:30:39,544 INFO L93 Difference]: Finished difference Result 109428 states and 136195 transitions. [2024-11-14 04:30:39,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-14 04:30:39,545 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.868421052631579) internal successors, (71), 37 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) Word has length 75 [2024-11-14 04:30:39,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:30:39,698 INFO L225 Difference]: With dead ends: 109428 [2024-11-14 04:30:39,698 INFO L226 Difference]: Without dead ends: 105499 [2024-11-14 04:30:39,729 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 141 SyntacticMatches, 3 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4924 ImplicationChecksByTransitivity, 33.3s TimeCoverageRelationStatistics Valid=1279, Invalid=9023, Unknown=0, NotChecked=0, Total=10302 [2024-11-14 04:30:39,730 INFO L432 NwaCegarLoop]: 96 mSDtfsCounter, 10 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 2969 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 2971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2024-11-14 04:30:39,730 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 231 Invalid, 2971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2969 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2024-11-14 04:30:39,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105499 states. [2024-11-14 04:30:41,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105499 to 105499. [2024-11-14 04:30:41,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105499 states, 105498 states have (on average 1.2451326091489887) internal successors, (131359), 105498 states have internal predecessors, (131359), 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) [2024-11-14 04:30:41,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105499 states to 105499 states and 131359 transitions. [2024-11-14 04:30:41,561 INFO L78 Accepts]: Start accepts. Automaton has 105499 states and 131359 transitions. Word has length 75 [2024-11-14 04:30:41,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:30:41,562 INFO L471 AbstractCegarLoop]: Abstraction has 105499 states and 131359 transitions. [2024-11-14 04:30:41,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.868421052631579) internal successors, (71), 37 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) [2024-11-14 04:30:41,562 INFO L276 IsEmpty]: Start isEmpty. Operand 105499 states and 131359 transitions. [2024-11-14 04:30:41,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-14 04:30:41,566 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:30:41,566 INFO L215 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] [2024-11-14 04:30:41,589 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 04:30:41,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:30:41,770 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:30:41,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:30:41,771 INFO L85 PathProgramCache]: Analyzing trace with hash -66408546, now seen corresponding path program 1 times [2024-11-14 04:30:41,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:30:41,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33312741] [2024-11-14 04:30:41,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:30:41,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:30:41,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:30:42,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 04:30:42,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:30:42,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33312741] [2024-11-14 04:30:42,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33312741] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:30:42,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:30:42,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 04:30:42,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264689172] [2024-11-14 04:30:42,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:30:42,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:30:42,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:30:42,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:30:42,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:30:42,301 INFO L87 Difference]: Start difference. First operand 105499 states and 131359 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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) [2024-11-14 04:30:43,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:30:43,401 INFO L93 Difference]: Finished difference Result 172292 states and 214287 transitions. [2024-11-14 04:30:43,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 04:30:43,401 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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 77 [2024-11-14 04:30:43,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:30:43,540 INFO L225 Difference]: With dead ends: 172292 [2024-11-14 04:30:43,541 INFO L226 Difference]: Without dead ends: 104835 [2024-11-14 04:30:43,573 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:30:43,574 INFO L432 NwaCegarLoop]: 121 mSDtfsCounter, 250 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:30:43,575 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 338 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:30:43,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104835 states. [2024-11-14 04:30:45,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104835 to 94713. [2024-11-14 04:30:45,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94713 states, 94712 states have (on average 1.2425141481544049) internal successors, (117681), 94712 states have internal predecessors, (117681), 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) [2024-11-14 04:30:45,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94713 states to 94713 states and 117681 transitions. [2024-11-14 04:30:45,317 INFO L78 Accepts]: Start accepts. Automaton has 94713 states and 117681 transitions. Word has length 77 [2024-11-14 04:30:45,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:30:45,318 INFO L471 AbstractCegarLoop]: Abstraction has 94713 states and 117681 transitions. [2024-11-14 04:30:45,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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) [2024-11-14 04:30:45,318 INFO L276 IsEmpty]: Start isEmpty. Operand 94713 states and 117681 transitions. [2024-11-14 04:30:45,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-14 04:30:45,320 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:30:45,320 INFO L215 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] [2024-11-14 04:30:45,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-11-14 04:30:45,321 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:30:45,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:30:45,322 INFO L85 PathProgramCache]: Analyzing trace with hash 413123868, now seen corresponding path program 1 times [2024-11-14 04:30:45,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:30:45,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180642479] [2024-11-14 04:30:45,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:30:45,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:30:45,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:30:50,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:30:50,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:30:50,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180642479] [2024-11-14 04:30:50,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180642479] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:30:50,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595857279] [2024-11-14 04:30:50,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:30:50,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:30:50,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:30:50,143 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:30:50,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_692eecf2-ac80-4da1-9579-7425d75ac07f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 04:30:50,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:30:50,418 INFO L255 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-11-14 04:30:50,433 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:30:58,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:30:58,484 INFO L311 TraceCheckSpWp]: Computing backward predicates...