./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+cfa-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_49fadc37-166e-4c5c-b545-b22298cc6073/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49fadc37-166e-4c5c-b545-b22298cc6073/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_49fadc37-166e-4c5c-b545-b22298cc6073/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49fadc37-166e-4c5c-b545-b22298cc6073/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49fadc37-166e-4c5c-b545-b22298cc6073/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_49fadc37-166e-4c5c-b545-b22298cc6073/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 8c73977f942e89d9992bb22ca052cbbbf488baa4bd312066f1673eed7b40e630 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 02:56:22,271 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 02:56:22,360 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49fadc37-166e-4c5c-b545-b22298cc6073/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 02:56:22,373 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 02:56:22,374 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 02:56:22,419 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 02:56:22,420 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 02:56:22,420 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 02:56:22,421 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 02:56:22,421 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 02:56:22,421 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 02:56:22,422 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 02:56:22,423 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 02:56:22,423 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 02:56:22,423 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 02:56:22,423 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 02:56:22,423 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 02:56:22,423 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 02:56:22,424 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 02:56:22,425 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 02:56:22,425 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 02:56:22,425 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 02:56:22,425 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 02:56:22,426 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 02:56:22,426 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 02:56:22,426 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 02:56:22,426 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 02:56:22,427 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 02:56:22,427 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 02:56:22,427 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 02:56:22,427 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 02:56:22,427 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 02:56:22,427 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 02:56:22,427 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 02:56:22,428 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 02:56:22,428 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 02:56:22,428 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 02:56:22,429 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 02:56:22,429 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 02:56:22,429 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 02:56:22,430 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 02:56:22,430 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 02:56:22,430 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 02:56:22,430 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 02:56:22,430 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 02:56:22,430 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 02:56:22,430 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 02:56:22,430 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_49fadc37-166e-4c5c-b545-b22298cc6073/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 -> 8c73977f942e89d9992bb22ca052cbbbf488baa4bd312066f1673eed7b40e630 [2024-11-14 02:56:22,802 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 02:56:22,811 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 02:56:22,814 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 02:56:22,815 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 02:56:22,816 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 02:56:22,817 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49fadc37-166e-4c5c-b545-b22298cc6073/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c Unable to find full path for "g++" [2024-11-14 02:56:25,040 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 02:56:25,376 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 02:56:25,380 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49fadc37-166e-4c5c-b545-b22298cc6073/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2024-11-14 02:56:25,404 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49fadc37-166e-4c5c-b545-b22298cc6073/bin/utaipan-verify-sOmjnqqW8E/data/5d98df191/096eb1c3ce9d47de9232cb53e3d224d4/FLAGd4dc2d2ae [2024-11-14 02:56:25,431 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49fadc37-166e-4c5c-b545-b22298cc6073/bin/utaipan-verify-sOmjnqqW8E/data/5d98df191/096eb1c3ce9d47de9232cb53e3d224d4 [2024-11-14 02:56:25,435 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 02:56:25,438 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 02:56:25,441 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 02:56:25,442 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 02:56:25,448 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 02:56:25,449 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 02:56:25" (1/1) ... [2024-11-14 02:56:25,450 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55a3687b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:56:25, skipping insertion in model container [2024-11-14 02:56:25,450 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 02:56:25" (1/1) ... [2024-11-14 02:56:25,490 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 02:56:25,824 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_49fadc37-166e-4c5c-b545-b22298cc6073/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[6358,6371] [2024-11-14 02:56:25,884 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 02:56:25,902 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 02:56:25,953 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_49fadc37-166e-4c5c-b545-b22298cc6073/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[6358,6371] [2024-11-14 02:56:25,979 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 02:56:25,998 INFO L204 MainTranslator]: Completed translation [2024-11-14 02:56:25,999 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:56:25 WrapperNode [2024-11-14 02:56:25,999 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 02:56:26,000 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 02:56:26,001 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 02:56:26,001 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 02:56:26,012 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:56:25" (1/1) ... [2024-11-14 02:56:26,033 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:56:25" (1/1) ... [2024-11-14 02:56:26,070 INFO L138 Inliner]: procedures = 25, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 573 [2024-11-14 02:56:26,071 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 02:56:26,072 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 02:56:26,072 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 02:56:26,072 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 02:56:26,081 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:56:25" (1/1) ... [2024-11-14 02:56:26,081 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:56:25" (1/1) ... [2024-11-14 02:56:26,085 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:56:25" (1/1) ... [2024-11-14 02:56:26,085 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:56:25" (1/1) ... [2024-11-14 02:56:26,096 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:56:25" (1/1) ... [2024-11-14 02:56:26,101 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:56:25" (1/1) ... [2024-11-14 02:56:26,107 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:56:25" (1/1) ... [2024-11-14 02:56:26,110 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:56:25" (1/1) ... [2024-11-14 02:56:26,118 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 02:56:26,122 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 02:56:26,125 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 02:56:26,126 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 02:56:26,127 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:56:25" (1/1) ... [2024-11-14 02:56:26,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 02:56:26,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49fadc37-166e-4c5c-b545-b22298cc6073/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:56:26,165 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49fadc37-166e-4c5c-b545-b22298cc6073/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 02:56:26,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49fadc37-166e-4c5c-b545-b22298cc6073/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 02:56:26,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 02:56:26,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 02:56:26,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 02:56:26,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 02:56:26,395 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 02:56:26,397 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 02:56:27,358 INFO L? ?]: Removed 51 outVars from TransFormulas that were not future-live. [2024-11-14 02:56:27,358 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 02:56:27,637 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 02:56:27,639 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-14 02:56:27,640 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 02:56:27 BoogieIcfgContainer [2024-11-14 02:56:27,640 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 02:56:27,643 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 02:56:27,644 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 02:56:27,651 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 02:56:27,651 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 02:56:25" (1/3) ... [2024-11-14 02:56:27,652 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3945a39b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 02:56:27, skipping insertion in model container [2024-11-14 02:56:27,652 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:56:25" (2/3) ... [2024-11-14 02:56:27,653 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3945a39b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 02:56:27, skipping insertion in model container [2024-11-14 02:56:27,653 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 02:56:27" (3/3) ... [2024-11-14 02:56:27,655 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2024-11-14 02:56:27,677 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 02:56:27,680 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c that has 1 procedures, 105 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2024-11-14 02:56:27,775 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 02:56:27,797 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;@f63ec4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 02:56:27,797 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 02:56:27,803 INFO L276 IsEmpty]: Start isEmpty. Operand has 105 states, 103 states have (on average 1.6796116504854368) internal successors, (173), 104 states have internal predecessors, (173), 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 02:56:27,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-14 02:56:27,813 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:56:27,813 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 02:56:27,814 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:56:27,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:56:27,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1859806923, now seen corresponding path program 1 times [2024-11-14 02:56:27,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:56:27,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981447763] [2024-11-14 02:56:27,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:56:27,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:56:28,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:56:28,503 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 02:56:28,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:56:28,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981447763] [2024-11-14 02:56:28,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981447763] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:56:28,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:56:28,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 02:56:28,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787334825] [2024-11-14 02:56:28,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:56:28,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:56:28,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:56:28,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:56:28,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:56:28,541 INFO L87 Difference]: Start difference. First operand has 105 states, 103 states have (on average 1.6796116504854368) internal successors, (173), 104 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 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 02:56:28,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:56:28,691 INFO L93 Difference]: Finished difference Result 236 states and 368 transitions. [2024-11-14 02:56:28,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:56:28,696 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 02:56:28,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:56:28,712 INFO L225 Difference]: With dead ends: 236 [2024-11-14 02:56:28,712 INFO L226 Difference]: Without dead ends: 161 [2024-11-14 02:56:28,719 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 02:56:28,726 INFO L432 NwaCegarLoop]: 242 mSDtfsCounter, 129 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:56:28,727 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 332 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:56:28,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-11-14 02:56:28,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2024-11-14 02:56:28,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.4113924050632911) internal successors, (223), 158 states have internal predecessors, (223), 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 02:56:28,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 223 transitions. [2024-11-14 02:56:28,789 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 223 transitions. Word has length 47 [2024-11-14 02:56:28,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:56:28,789 INFO L471 AbstractCegarLoop]: Abstraction has 159 states and 223 transitions. [2024-11-14 02:56:28,790 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 02:56:28,790 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 223 transitions. [2024-11-14 02:56:28,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-14 02:56:28,791 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:56:28,792 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] [2024-11-14 02:56:28,792 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 02:56:28,792 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:56:28,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:56:28,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1608679631, now seen corresponding path program 1 times [2024-11-14 02:56:28,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:56:28,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309459762] [2024-11-14 02:56:28,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:56:28,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:56:28,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:56:29,145 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 02:56:29,145 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:56:29,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309459762] [2024-11-14 02:56:29,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309459762] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:56:29,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:56:29,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 02:56:29,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242169890] [2024-11-14 02:56:29,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:56:29,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:56:29,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:56:29,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:56:29,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:56:29,151 INFO L87 Difference]: Start difference. First operand 159 states and 223 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:56:29,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:56:29,272 INFO L93 Difference]: Finished difference Result 387 states and 567 transitions. [2024-11-14 02:56:29,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:56:29,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2024-11-14 02:56:29,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:56:29,275 INFO L225 Difference]: With dead ends: 387 [2024-11-14 02:56:29,276 INFO L226 Difference]: Without dead ends: 262 [2024-11-14 02:56:29,277 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 02:56:29,278 INFO L432 NwaCegarLoop]: 190 mSDtfsCounter, 96 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:56:29,278 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 279 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:56:29,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2024-11-14 02:56:29,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2024-11-14 02:56:29,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 1.4478764478764479) internal successors, (375), 259 states have internal predecessors, (375), 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 02:56:29,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 375 transitions. [2024-11-14 02:56:29,305 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 375 transitions. Word has length 50 [2024-11-14 02:56:29,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:56:29,305 INFO L471 AbstractCegarLoop]: Abstraction has 260 states and 375 transitions. [2024-11-14 02:56:29,305 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:56:29,306 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 375 transitions. [2024-11-14 02:56:29,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-14 02:56:29,310 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:56:29,310 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] [2024-11-14 02:56:29,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 02:56:29,311 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:56:29,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:56:29,311 INFO L85 PathProgramCache]: Analyzing trace with hash 229540628, now seen corresponding path program 1 times [2024-11-14 02:56:29,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:56:29,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157957818] [2024-11-14 02:56:29,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:56:29,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:56:29,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:56:29,530 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 02:56:29,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:56:29,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157957818] [2024-11-14 02:56:29,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157957818] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:56:29,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:56:29,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 02:56:29,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519900492] [2024-11-14 02:56:29,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:56:29,531 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:56:29,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:56:29,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:56:29,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:56:29,533 INFO L87 Difference]: Start difference. First operand 260 states and 375 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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 02:56:29,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:56:29,625 INFO L93 Difference]: Finished difference Result 668 states and 989 transitions. [2024-11-14 02:56:29,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:56:29,626 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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 53 [2024-11-14 02:56:29,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:56:29,632 INFO L225 Difference]: With dead ends: 668 [2024-11-14 02:56:29,635 INFO L226 Difference]: Without dead ends: 442 [2024-11-14 02:56:29,637 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 02:56:29,638 INFO L432 NwaCegarLoop]: 171 mSDtfsCounter, 91 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:56:29,639 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 264 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:56:29,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2024-11-14 02:56:29,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 440. [2024-11-14 02:56:29,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 1.4646924829157175) internal successors, (643), 439 states have internal predecessors, (643), 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 02:56:29,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 643 transitions. [2024-11-14 02:56:29,669 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 643 transitions. Word has length 53 [2024-11-14 02:56:29,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:56:29,669 INFO L471 AbstractCegarLoop]: Abstraction has 440 states and 643 transitions. [2024-11-14 02:56:29,669 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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 02:56:29,670 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 643 transitions. [2024-11-14 02:56:29,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-14 02:56:29,671 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:56:29,672 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] [2024-11-14 02:56:29,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 02:56:29,672 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:56:29,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:56:29,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1352967923, now seen corresponding path program 1 times [2024-11-14 02:56:29,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:56:29,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854806380] [2024-11-14 02:56:29,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:56:29,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:56:29,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:56:29,834 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 02:56:29,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:56:29,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854806380] [2024-11-14 02:56:29,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854806380] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:56:29,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:56:29,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 02:56:29,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677020887] [2024-11-14 02:56:29,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:56:29,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:56:29,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:56:29,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:56:29,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:56:29,837 INFO L87 Difference]: Start difference. First operand 440 states and 643 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 02:56:29,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:56:29,928 INFO L93 Difference]: Finished difference Result 1164 states and 1725 transitions. [2024-11-14 02:56:29,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:56:29,931 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 56 [2024-11-14 02:56:29,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:56:29,938 INFO L225 Difference]: With dead ends: 1164 [2024-11-14 02:56:29,938 INFO L226 Difference]: Without dead ends: 758 [2024-11-14 02:56:29,939 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 02:56:29,942 INFO L432 NwaCegarLoop]: 152 mSDtfsCounter, 86 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:56:29,942 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 249 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:56:29,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2024-11-14 02:56:29,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 756. [2024-11-14 02:56:29,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 1.466225165562914) internal successors, (1107), 755 states have internal predecessors, (1107), 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 02:56:29,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1107 transitions. [2024-11-14 02:56:29,993 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1107 transitions. Word has length 56 [2024-11-14 02:56:29,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:56:29,993 INFO L471 AbstractCegarLoop]: Abstraction has 756 states and 1107 transitions. [2024-11-14 02:56:29,993 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 02:56:29,994 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1107 transitions. [2024-11-14 02:56:29,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-14 02:56:29,995 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:56:29,995 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] [2024-11-14 02:56:29,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 02:56:29,996 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:56:29,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:56:29,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1298879418, now seen corresponding path program 1 times [2024-11-14 02:56:30,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:56:30,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146570408] [2024-11-14 02:56:30,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:56:30,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:56:30,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:56:30,210 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 02:56:30,210 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:56:30,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146570408] [2024-11-14 02:56:30,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146570408] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:56:30,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:56:30,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 02:56:30,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345811034] [2024-11-14 02:56:30,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:56:30,212 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:56:30,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:56:30,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:56:30,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:56:30,215 INFO L87 Difference]: Start difference. First operand 756 states and 1107 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 02:56:30,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:56:30,317 INFO L93 Difference]: Finished difference Result 2024 states and 2981 transitions. [2024-11-14 02:56:30,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:56:30,318 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 59 [2024-11-14 02:56:30,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:56:30,328 INFO L225 Difference]: With dead ends: 2024 [2024-11-14 02:56:30,329 INFO L226 Difference]: Without dead ends: 1302 [2024-11-14 02:56:30,330 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 02:56:30,331 INFO L432 NwaCegarLoop]: 133 mSDtfsCounter, 81 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:56:30,334 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 234 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:56:30,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2024-11-14 02:56:30,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 1300. [2024-11-14 02:56:30,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 1299 states have (on average 1.4557351809083912) internal successors, (1891), 1299 states have internal predecessors, (1891), 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 02:56:30,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 1891 transitions. [2024-11-14 02:56:30,412 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 1891 transitions. Word has length 59 [2024-11-14 02:56:30,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:56:30,413 INFO L471 AbstractCegarLoop]: Abstraction has 1300 states and 1891 transitions. [2024-11-14 02:56:30,413 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 02:56:30,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 1891 transitions. [2024-11-14 02:56:30,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-14 02:56:30,418 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:56:30,418 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] [2024-11-14 02:56:30,419 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 02:56:30,419 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:56:30,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:56:30,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1916789976, now seen corresponding path program 1 times [2024-11-14 02:56:30,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:56:30,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588172074] [2024-11-14 02:56:30,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:56:30,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:56:30,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:56:30,939 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 02:56:30,941 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:56:30,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588172074] [2024-11-14 02:56:30,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588172074] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:56:30,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:56:30,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-14 02:56:30,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492606991] [2024-11-14 02:56:30,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:56:30,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 02:56:30,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:56:30,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 02:56:30,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-14 02:56:30,945 INFO L87 Difference]: Start difference. First operand 1300 states and 1891 transitions. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 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 02:56:31,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:56:31,239 INFO L93 Difference]: Finished difference Result 6590 states and 9576 transitions. [2024-11-14 02:56:31,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 02:56:31,239 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 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 62 [2024-11-14 02:56:31,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:56:31,264 INFO L225 Difference]: With dead ends: 6590 [2024-11-14 02:56:31,264 INFO L226 Difference]: Without dead ends: 5324 [2024-11-14 02:56:31,267 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-14 02:56:31,268 INFO L432 NwaCegarLoop]: 274 mSDtfsCounter, 476 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:56:31,269 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [476 Valid, 688 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 02:56:31,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5324 states. [2024-11-14 02:56:31,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5324 to 5316. [2024-11-14 02:56:31,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5316 states, 5315 states have (on average 1.4485418626528692) internal successors, (7699), 5315 states have internal predecessors, (7699), 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 02:56:31,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5316 states to 5316 states and 7699 transitions. [2024-11-14 02:56:31,490 INFO L78 Accepts]: Start accepts. Automaton has 5316 states and 7699 transitions. Word has length 62 [2024-11-14 02:56:31,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:56:31,491 INFO L471 AbstractCegarLoop]: Abstraction has 5316 states and 7699 transitions. [2024-11-14 02:56:31,491 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 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 02:56:31,491 INFO L276 IsEmpty]: Start isEmpty. Operand 5316 states and 7699 transitions. [2024-11-14 02:56:31,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-14 02:56:31,493 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:56:31,493 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, 1] [2024-11-14 02:56:31,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-14 02:56:31,493 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:56:31,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:56:31,494 INFO L85 PathProgramCache]: Analyzing trace with hash -2052613921, now seen corresponding path program 1 times [2024-11-14 02:56:31,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:56:31,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561390065] [2024-11-14 02:56:31,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:56:31,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:56:31,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:56:31,794 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 02:56:31,797 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:56:31,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561390065] [2024-11-14 02:56:31,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561390065] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:56:31,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:56:31,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 02:56:31,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146697357] [2024-11-14 02:56:31,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:56:31,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 02:56:31,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:56:31,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 02:56:31,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 02:56:31,800 INFO L87 Difference]: Start difference. First operand 5316 states and 7699 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:56:32,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:56:32,233 INFO L93 Difference]: Finished difference Result 13642 states and 19855 transitions. [2024-11-14 02:56:32,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 02:56:32,234 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2024-11-14 02:56:32,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:56:32,273 INFO L225 Difference]: With dead ends: 13642 [2024-11-14 02:56:32,273 INFO L226 Difference]: Without dead ends: 8360 [2024-11-14 02:56:32,282 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 02:56:32,283 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 562 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 02:56:32,283 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [562 Valid, 135 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 02:56:32,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8360 states. [2024-11-14 02:56:32,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8360 to 8358. [2024-11-14 02:56:32,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8358 states, 8357 states have (on average 1.441306689003231) internal successors, (12045), 8357 states have internal predecessors, (12045), 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 02:56:32,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8358 states to 8358 states and 12045 transitions. [2024-11-14 02:56:32,606 INFO L78 Accepts]: Start accepts. Automaton has 8358 states and 12045 transitions. Word has length 64 [2024-11-14 02:56:32,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:56:32,606 INFO L471 AbstractCegarLoop]: Abstraction has 8358 states and 12045 transitions. [2024-11-14 02:56:32,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:56:32,607 INFO L276 IsEmpty]: Start isEmpty. Operand 8358 states and 12045 transitions. [2024-11-14 02:56:32,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-14 02:56:32,608 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:56:32,608 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:56:32,608 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-14 02:56:32,608 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:56:32,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:56:32,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1916852710, now seen corresponding path program 1 times [2024-11-14 02:56:32,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:56:32,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616584571] [2024-11-14 02:56:32,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:56:32,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:56:32,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:56:33,571 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 02:56:33,571 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:56:33,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616584571] [2024-11-14 02:56:33,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616584571] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:56:33,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:56:33,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-14 02:56:33,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718438836] [2024-11-14 02:56:33,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:56:33,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 02:56:33,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:56:33,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 02:56:33,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-11-14 02:56:33,575 INFO L87 Difference]: Start difference. First operand 8358 states and 12045 transitions. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:56:33,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:56:33,994 INFO L93 Difference]: Finished difference Result 14430 states and 20834 transitions. [2024-11-14 02:56:33,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 02:56:33,997 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2024-11-14 02:56:33,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:56:34,075 INFO L225 Difference]: With dead ends: 14430 [2024-11-14 02:56:34,075 INFO L226 Difference]: Without dead ends: 14428 [2024-11-14 02:56:34,080 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2024-11-14 02:56:34,081 INFO L432 NwaCegarLoop]: 137 mSDtfsCounter, 1104 mSDsluCounter, 1334 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1104 SdHoareTripleChecker+Valid, 1471 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:56:34,082 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1104 Valid, 1471 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 02:56:34,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14428 states. [2024-11-14 02:56:34,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14428 to 8746. [2024-11-14 02:56:34,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8746 states, 8745 states have (on average 1.441852487135506) internal successors, (12609), 8745 states have internal predecessors, (12609), 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 02:56:34,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8746 states to 8746 states and 12609 transitions. [2024-11-14 02:56:34,366 INFO L78 Accepts]: Start accepts. Automaton has 8746 states and 12609 transitions. Word has length 64 [2024-11-14 02:56:34,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:56:34,367 INFO L471 AbstractCegarLoop]: Abstraction has 8746 states and 12609 transitions. [2024-11-14 02:56:34,368 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:56:34,368 INFO L276 IsEmpty]: Start isEmpty. Operand 8746 states and 12609 transitions. [2024-11-14 02:56:34,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-14 02:56:34,370 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:56:34,371 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:56:34,371 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-14 02:56:34,371 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:56:34,372 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:56:34,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1131506647, now seen corresponding path program 1 times [2024-11-14 02:56:34,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:56:34,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073480634] [2024-11-14 02:56:34,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:56:34,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:56:34,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:56:36,521 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:56:36,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:56:36,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073480634] [2024-11-14 02:56:36,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073480634] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:56:36,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312177027] [2024-11-14 02:56:36,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:56:36,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:56:36,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49fadc37-166e-4c5c-b545-b22298cc6073/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:56:36,524 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49fadc37-166e-4c5c-b545-b22298cc6073/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:56:36,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49fadc37-166e-4c5c-b545-b22298cc6073/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 02:56:36,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:56:36,722 INFO L255 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-14 02:56:36,738 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:56:42,000 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:56:42,000 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:57:08,948 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:57:08,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312177027] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:57:08,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [904019406] [2024-11-14 02:57:08,975 INFO L159 IcfgInterpreter]: Started Sifa with 65 locations of interest [2024-11-14 02:57:08,975 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:57:08,984 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:57:08,989 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:57:08,990 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:57:46,371 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:58:08,354 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '65146#(and (= ~nomsg~0 ~p1_new~0) (= ~nomsg~0 ~p4_new~0) (<= 0 ~mode4~0) (= ~nomsg~0 ~p5_new~0) (<= 0 ~mode3~0) (= ~p3_new~0 ~nomsg~0) (<= ~mode2~0 1) (<= ~mode5~0 1) (or (< 1 (+ ~st5~0 ~st4~0 ~st3~0 ~st2~0 ~st1~0)) (and (<= 5 (mod ~r1~0 256)) (not (= (+ ~st5~0 ~st4~0 ~st3~0 ~st2~0 ~st1~0) 1)))) (<= ~mode3~0 1) (exists ((|v_ULTIMATE.start_main_~assert__arg~0#1_26| Int)) (and (= ~__return_58749~0 0) (= 0 |v_ULTIMATE.start_main_~assert__arg~0#1_26|))) (<= ~mode4~0 1) (= ~nomsg~0 ~p2_new~0) (<= 0 ~mode5~0))' at error location [2024-11-14 02:58:08,355 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:58:08,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:58:08,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 21] total 57 [2024-11-14 02:58:08,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581423385] [2024-11-14 02:58:08,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:58:08,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-14 02:58:08,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:58:08,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-14 02:58:08,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1795, Invalid=11087, Unknown=0, NotChecked=0, Total=12882 [2024-11-14 02:58:08,360 INFO L87 Difference]: Start difference. First operand 8746 states and 12609 transitions. Second operand has 57 states, 57 states have (on average 3.9473684210526314) internal successors, (225), 57 states have internal predecessors, (225), 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 03:04:59,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:04:59,663 INFO L93 Difference]: Finished difference Result 88365 states and 128052 transitions. [2024-11-14 03:04:59,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 294 states. [2024-11-14 03:04:59,664 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.9473684210526314) internal successors, (225), 57 states have internal predecessors, (225), 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 76 [2024-11-14 03:04:59,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:04:59,872 INFO L225 Difference]: With dead ends: 88365 [2024-11-14 03:04:59,872 INFO L226 Difference]: Without dead ends: 79674 [2024-11-14 03:04:59,917 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 396 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74108 ImplicationChecksByTransitivity, 412.2s TimeCoverageRelationStatistics Valid=23249, Invalid=134757, Unknown=0, NotChecked=0, Total=158006 [2024-11-14 03:04:59,919 INFO L432 NwaCegarLoop]: 228 mSDtfsCounter, 15541 mSDsluCounter, 7699 mSDsCounter, 0 mSdLazyCounter, 11506 mSolverCounterSat, 640 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15541 SdHoareTripleChecker+Valid, 7927 SdHoareTripleChecker+Invalid, 12146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 640 IncrementalHoareTripleChecker+Valid, 11506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:04:59,919 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15541 Valid, 7927 Invalid, 12146 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [640 Valid, 11506 Invalid, 0 Unknown, 0 Unchecked, 23.7s Time] [2024-11-14 03:05:00,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79674 states. [2024-11-14 03:05:00,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79674 to 34887. [2024-11-14 03:05:00,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34887 states, 34886 states have (on average 1.422576391675744) internal successors, (49628), 34886 states have internal predecessors, (49628), 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 03:05:01,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34887 states to 34887 states and 49628 transitions. [2024-11-14 03:05:01,037 INFO L78 Accepts]: Start accepts. Automaton has 34887 states and 49628 transitions. Word has length 76 [2024-11-14 03:05:01,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:05:01,037 INFO L471 AbstractCegarLoop]: Abstraction has 34887 states and 49628 transitions. [2024-11-14 03:05:01,038 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.9473684210526314) internal successors, (225), 57 states have internal predecessors, (225), 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 03:05:01,038 INFO L276 IsEmpty]: Start isEmpty. Operand 34887 states and 49628 transitions. [2024-11-14 03:05:01,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-14 03:05:01,048 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:05:01,048 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:05:01,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49fadc37-166e-4c5c-b545-b22298cc6073/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-14 03:05:01,249 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49fadc37-166e-4c5c-b545-b22298cc6073/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-14 03:05:01,249 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:05:01,249 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:05:01,250 INFO L85 PathProgramCache]: Analyzing trace with hash -121315648, now seen corresponding path program 1 times [2024-11-14 03:05:01,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:05:01,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507098441] [2024-11-14 03:05:01,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:05:01,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:05:01,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:05:01,426 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 03:05:01,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:05:01,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507098441] [2024-11-14 03:05:01,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507098441] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:05:01,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:05:01,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 03:05:01,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030364182] [2024-11-14 03:05:01,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:05:01,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:05:01,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:05:01,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:05:01,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:05:01,428 INFO L87 Difference]: Start difference. First operand 34887 states and 49628 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 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 03:05:02,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:05:02,087 INFO L93 Difference]: Finished difference Result 88524 states and 126678 transitions. [2024-11-14 03:05:02,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:05:02,087 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 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 76 [2024-11-14 03:05:02,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:05:02,178 INFO L225 Difference]: With dead ends: 88524 [2024-11-14 03:05:02,178 INFO L226 Difference]: Without dead ends: 53721 [2024-11-14 03:05:02,201 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 03:05:02,206 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 543 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:05:02,206 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [543 Valid, 145 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:05:02,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53721 states. [2024-11-14 03:05:02,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53721 to 53719. [2024-11-14 03:05:02,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53719 states, 53718 states have (on average 1.4206597416136117) internal successors, (76315), 53718 states have internal predecessors, (76315), 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 03:05:02,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53719 states to 53719 states and 76315 transitions. [2024-11-14 03:05:02,953 INFO L78 Accepts]: Start accepts. Automaton has 53719 states and 76315 transitions. Word has length 76 [2024-11-14 03:05:02,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:05:02,953 INFO L471 AbstractCegarLoop]: Abstraction has 53719 states and 76315 transitions. [2024-11-14 03:05:02,953 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 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 03:05:02,953 INFO L276 IsEmpty]: Start isEmpty. Operand 53719 states and 76315 transitions. [2024-11-14 03:05:02,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-14 03:05:02,959 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:05:02,959 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:05:02,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-14 03:05:02,960 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:05:02,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:05:02,961 INFO L85 PathProgramCache]: Analyzing trace with hash -278263515, now seen corresponding path program 1 times [2024-11-14 03:05:02,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:05:02,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033635273] [2024-11-14 03:05:02,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:05:02,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:05:03,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:05:05,088 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:05:05,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:05:05,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033635273] [2024-11-14 03:05:05,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033635273] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:05:05,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828501741] [2024-11-14 03:05:05,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:05:05,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:05:05,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49fadc37-166e-4c5c-b545-b22298cc6073/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:05:05,091 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49fadc37-166e-4c5c-b545-b22298cc6073/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:05:05,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49fadc37-166e-4c5c-b545-b22298cc6073/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 03:05:05,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:05:05,249 INFO L255 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-14 03:05:05,254 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:05:08,036 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:05:08,036 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:05:33,380 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:05:33,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828501741] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:05:33,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1989398412] [2024-11-14 03:05:33,384 INFO L159 IcfgInterpreter]: Started Sifa with 65 locations of interest [2024-11-14 03:05:33,384 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:05:33,384 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:05:33,384 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:05:33,384 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:05:49,422 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:06:17,125 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '331782#(and (exists ((|v_ULTIMATE.start_main_~assert__arg~0#1_41| Int)) (and (= ~__return_58749~0 0) (= 0 |v_ULTIMATE.start_main_~assert__arg~0#1_41|))) (= ~nomsg~0 ~p1_new~0) (= ~nomsg~0 ~p4_new~0) (<= 0 ~mode4~0) (= ~nomsg~0 ~p5_new~0) (<= 0 ~mode3~0) (= ~p3_new~0 ~nomsg~0) (<= ~mode2~0 1) (<= ~mode5~0 1) (or (< 1 (+ ~st5~0 ~st4~0 ~st3~0 ~st2~0 ~st1~0)) (and (<= 5 (mod ~r1~0 256)) (not (= (+ ~st5~0 ~st4~0 ~st3~0 ~st2~0 ~st1~0) 1)))) (<= ~mode3~0 1) (<= ~mode4~0 1) (= ~nomsg~0 ~p2_new~0) (<= 0 ~mode5~0))' at error location [2024-11-14 03:06:17,125 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:06:17,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:06:17,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 21] total 57 [2024-11-14 03:06:17,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079358709] [2024-11-14 03:06:17,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:06:17,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-14 03:06:17,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:06:17,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-14 03:06:17,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1785, Invalid=11325, Unknown=0, NotChecked=0, Total=13110 [2024-11-14 03:06:17,131 INFO L87 Difference]: Start difference. First operand 53719 states and 76315 transitions. Second operand has 57 states, 57 states have (on average 3.9473684210526314) internal successors, (225), 57 states have internal predecessors, (225), 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 03:10:22,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:10:22,870 INFO L93 Difference]: Finished difference Result 277156 states and 396602 transitions. [2024-11-14 03:10:22,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 234 states. [2024-11-14 03:10:22,871 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.9473684210526314) internal successors, (225), 57 states have internal predecessors, (225), 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 76 [2024-11-14 03:10:22,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:10:23,247 INFO L225 Difference]: With dead ends: 277156 [2024-11-14 03:10:23,247 INFO L226 Difference]: Without dead ends: 223479 [2024-11-14 03:10:23,317 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 339 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52017 ImplicationChecksByTransitivity, 257.4s TimeCoverageRelationStatistics Valid=15501, Invalid=100439, Unknown=0, NotChecked=0, Total=115940 [2024-11-14 03:10:23,318 INFO L432 NwaCegarLoop]: 219 mSDtfsCounter, 16285 mSDsluCounter, 7064 mSDsCounter, 0 mSdLazyCounter, 8831 mSolverCounterSat, 612 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16285 SdHoareTripleChecker+Valid, 7283 SdHoareTripleChecker+Invalid, 9443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 612 IncrementalHoareTripleChecker+Valid, 8831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:10:23,319 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16285 Valid, 7283 Invalid, 9443 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [612 Valid, 8831 Invalid, 0 Unknown, 0 Unchecked, 17.5s Time] [2024-11-14 03:10:23,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223479 states. [2024-11-14 03:10:25,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223479 to 76376. [2024-11-14 03:10:25,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76376 states, 76375 states have (on average 1.4199672667757774) internal successors, (108450), 76375 states have internal predecessors, (108450), 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 03:10:25,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76376 states to 76376 states and 108450 transitions. [2024-11-14 03:10:25,842 INFO L78 Accepts]: Start accepts. Automaton has 76376 states and 108450 transitions. Word has length 76 [2024-11-14 03:10:25,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:10:25,843 INFO L471 AbstractCegarLoop]: Abstraction has 76376 states and 108450 transitions. [2024-11-14 03:10:25,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.9473684210526314) internal successors, (225), 57 states have internal predecessors, (225), 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 03:10:25,843 INFO L276 IsEmpty]: Start isEmpty. Operand 76376 states and 108450 transitions. [2024-11-14 03:10:25,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-14 03:10:25,850 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:10:25,851 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:10:25,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49fadc37-166e-4c5c-b545-b22298cc6073/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 03:10:26,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49fadc37-166e-4c5c-b545-b22298cc6073/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-14 03:10:26,055 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:10:26,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:10:26,056 INFO L85 PathProgramCache]: Analyzing trace with hash -368341609, now seen corresponding path program 1 times [2024-11-14 03:10:26,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:10:26,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611412775] [2024-11-14 03:10:26,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:10:26,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:10:26,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat