./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem14_label03.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_d262664b-1e70-4824-b722-55843f0f4f1b/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d262664b-1e70-4824-b722-55843f0f4f1b/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_d262664b-1e70-4824-b722-55843f0f4f1b/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d262664b-1e70-4824-b722-55843f0f4f1b/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem14_label03.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d262664b-1e70-4824-b722-55843f0f4f1b/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_d262664b-1e70-4824-b722-55843f0f4f1b/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 d4466c84cf3346dae2c632daaf2229efd1401f42fa973f4243eec5185ec47b02 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 03:49:02,537 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 03:49:02,633 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d262664b-1e70-4824-b722-55843f0f4f1b/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 03:49:02,642 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 03:49:02,646 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 03:49:02,696 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 03:49:02,698 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 03:49:02,699 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 03:49:02,699 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 03:49:02,700 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 03:49:02,701 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 03:49:02,701 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 03:49:02,702 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 03:49:02,702 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 03:49:02,702 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 03:49:02,702 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 03:49:02,702 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 03:49:02,702 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 03:49:02,702 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 03:49:02,702 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 03:49:02,702 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 03:49:02,702 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 03:49:02,703 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 03:49:02,703 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 03:49:02,703 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 03:49:02,703 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 03:49:02,703 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 03:49:02,703 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 03:49:02,703 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 03:49:02,704 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 03:49:02,704 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 03:49:02,704 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 03:49:02,704 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 03:49:02,704 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 03:49:02,704 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 03:49:02,704 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 03:49:02,704 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 03:49:02,706 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 03:49:02,706 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:49:02,706 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 03:49:02,707 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 03:49:02,707 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 03:49:02,707 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 03:49:02,707 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 03:49:02,708 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 03:49:02,708 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 03:49:02,708 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 03:49:02,708 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_d262664b-1e70-4824-b722-55843f0f4f1b/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 -> d4466c84cf3346dae2c632daaf2229efd1401f42fa973f4243eec5185ec47b02 [2024-11-14 03:49:03,192 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 03:49:03,204 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 03:49:03,207 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 03:49:03,209 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 03:49:03,210 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 03:49:03,212 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d262664b-1e70-4824-b722-55843f0f4f1b/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/eca-rers2012/Problem14_label03.c Unable to find full path for "g++" [2024-11-14 03:49:05,555 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 03:49:05,951 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 03:49:05,952 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d262664b-1e70-4824-b722-55843f0f4f1b/sv-benchmarks/c/eca-rers2012/Problem14_label03.c [2024-11-14 03:49:05,966 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d262664b-1e70-4824-b722-55843f0f4f1b/bin/utaipan-verify-sOmjnqqW8E/data/fe14b7dd5/b8461835287c43d0890365fc2045d501/FLAGd90aabf72 [2024-11-14 03:49:05,985 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d262664b-1e70-4824-b722-55843f0f4f1b/bin/utaipan-verify-sOmjnqqW8E/data/fe14b7dd5/b8461835287c43d0890365fc2045d501 [2024-11-14 03:49:05,988 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 03:49:05,990 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 03:49:05,992 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 03:49:05,992 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 03:49:05,998 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 03:49:05,999 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:49:05" (1/1) ... [2024-11-14 03:49:06,000 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bd4a6f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:49:06, skipping insertion in model container [2024-11-14 03:49:06,001 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:49:05" (1/1) ... [2024-11-14 03:49:06,052 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 03:49:06,341 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_d262664b-1e70-4824-b722-55843f0f4f1b/sv-benchmarks/c/eca-rers2012/Problem14_label03.c[5277,5290] [2024-11-14 03:49:06,561 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:49:06,574 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 03:49:06,607 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_d262664b-1e70-4824-b722-55843f0f4f1b/sv-benchmarks/c/eca-rers2012/Problem14_label03.c[5277,5290] [2024-11-14 03:49:06,748 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:49:06,769 INFO L204 MainTranslator]: Completed translation [2024-11-14 03:49:06,770 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:49:06 WrapperNode [2024-11-14 03:49:06,774 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 03:49:06,775 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 03:49:06,775 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 03:49:06,775 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 03:49:06,785 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:49:06" (1/1) ... [2024-11-14 03:49:06,818 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:49:06" (1/1) ... [2024-11-14 03:49:06,954 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 858 [2024-11-14 03:49:06,955 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 03:49:06,958 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 03:49:06,958 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 03:49:06,959 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 03:49:06,971 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:49:06" (1/1) ... [2024-11-14 03:49:06,972 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:49:06" (1/1) ... [2024-11-14 03:49:06,979 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:49:06" (1/1) ... [2024-11-14 03:49:06,980 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:49:06" (1/1) ... [2024-11-14 03:49:07,011 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:49:06" (1/1) ... [2024-11-14 03:49:07,034 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:49:06" (1/1) ... [2024-11-14 03:49:07,043 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:49:06" (1/1) ... [2024-11-14 03:49:07,057 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:49:06" (1/1) ... [2024-11-14 03:49:07,081 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 03:49:07,082 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 03:49:07,083 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 03:49:07,083 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 03:49:07,084 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:49:06" (1/1) ... [2024-11-14 03:49:07,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:49:07,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d262664b-1e70-4824-b722-55843f0f4f1b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:49:07,145 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d262664b-1e70-4824-b722-55843f0f4f1b/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 03:49:07,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d262664b-1e70-4824-b722-55843f0f4f1b/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 03:49:07,187 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 03:49:07,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 03:49:07,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 03:49:07,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 03:49:07,333 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 03:49:07,336 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 03:49:09,519 INFO L? ?]: Removed 123 outVars from TransFormulas that were not future-live. [2024-11-14 03:49:09,519 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 03:49:15,908 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 03:49:15,908 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-14 03:49:15,909 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:49:15 BoogieIcfgContainer [2024-11-14 03:49:15,909 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 03:49:15,913 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 03:49:15,915 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 03:49:15,922 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 03:49:15,923 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 03:49:05" (1/3) ... [2024-11-14 03:49:15,924 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20f2ee8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:49:15, skipping insertion in model container [2024-11-14 03:49:15,925 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:49:06" (2/3) ... [2024-11-14 03:49:15,927 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20f2ee8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:49:15, skipping insertion in model container [2024-11-14 03:49:15,927 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:49:15" (3/3) ... [2024-11-14 03:49:15,928 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label03.c [2024-11-14 03:49:15,948 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 03:49:15,950 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG Problem14_label03.c that has 1 procedures, 9 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2024-11-14 03:49:16,021 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 03:49:16,041 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;@14b8fe64, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 03:49:16,043 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 03:49:16,049 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 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 03:49:16,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-14 03:49:16,060 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:49:16,061 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-14 03:49:16,061 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:49:16,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:49:16,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1057237028, now seen corresponding path program 1 times [2024-11-14 03:49:16,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:49:16,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902386856] [2024-11-14 03:49:16,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:49:16,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:49:16,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:49:16,407 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 03:49:16,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:49:16,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902386856] [2024-11-14 03:49:16,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902386856] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:49:16,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:49:16,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:49:16,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594575382] [2024-11-14 03:49:16,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:49:16,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:49:16,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:49:16,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:49:16,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:49:16,452 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 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 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 03:49:16,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:49:16,731 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2024-11-14 03:49:16,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:49:16,735 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2024-11-14 03:49:16,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:49:16,743 INFO L225 Difference]: With dead ends: 23 [2024-11-14 03:49:16,744 INFO L226 Difference]: Without dead ends: 11 [2024-11-14 03:49:16,748 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:49:16,754 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:49:16,755 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 7 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:49:16,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2024-11-14 03:49:16,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2024-11-14 03:49:16,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 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 03:49:16,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2024-11-14 03:49:16,796 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 5 [2024-11-14 03:49:16,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:49:16,797 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2024-11-14 03:49:16,797 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 03:49:16,798 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2024-11-14 03:49:16,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-14 03:49:16,800 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:49:16,800 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-14 03:49:16,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 03:49:16,802 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:49:16,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:49:16,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1736245052, now seen corresponding path program 1 times [2024-11-14 03:49:16,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:49:16,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180508250] [2024-11-14 03:49:16,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:49:16,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:49:17,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:49:44,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:49:44,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:49:44,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180508250] [2024-11-14 03:49:44,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180508250] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:49:44,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687211631] [2024-11-14 03:49:44,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:49:44,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:49:44,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d262664b-1e70-4824-b722-55843f0f4f1b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:49:44,768 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d262664b-1e70-4824-b722-55843f0f4f1b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:49:44,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d262664b-1e70-4824-b722-55843f0f4f1b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 03:49:44,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:49:44,933 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-14 03:49:44,947 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:49:48,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:49:48,336 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:50:53,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:50:53,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687211631] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:50:53,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1754199238] [2024-11-14 03:50:53,276 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 03:50:53,276 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:50:53,282 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:50:53,288 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:50:53,289 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:50:54,625 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 47 [2024-11-14 03:50:56,743 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 38016 conjunctions. This might take some time... [2024-11-14 03:51:00,051 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 468 conjunctions. [2024-11-14 03:51:00,067 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 47 [2024-11-14 03:51:02,708 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 38016 conjunctions. This might take some time... [2024-11-14 03:51:05,656 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 468 conjunctions. [2024-11-14 03:55:19,918 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 46 [2024-11-14 03:55:20,471 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 19008 conjunctions. This might take some time... [2024-11-14 03:55:21,155 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 234 conjunctions. [2024-11-14 03:55:21,158 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 46 [2024-11-14 03:55:22,087 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 19008 conjunctions. This might take some time... [2024-11-14 03:55:22,779 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 234 conjunctions. [2024-11-14 04:01:29,074 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 46 [2024-11-14 04:01:29,872 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 19008 conjunctions. This might take some time... [2024-11-14 04:01:30,491 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 234 conjunctions. [2024-11-14 04:01:30,496 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 46 [2024-11-14 04:01:31,081 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 19008 conjunctions. This might take some time... [2024-11-14 04:01:31,725 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 234 conjunctions. [2024-11-14 04:01:31,782 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 46 [2024-11-14 04:01:32,408 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 19008 conjunctions. This might take some time... [2024-11-14 04:01:33,062 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 234 conjunctions. [2024-11-14 04:01:33,106 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 46 [2024-11-14 04:01:33,722 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 19008 conjunctions. This might take some time... [2024-11-14 04:01:34,357 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 234 conjunctions. [2024-11-14 04:01:34,378 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:01:34,454 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '114#(and (<= (+ ~a12~0 43) 0) (= ~a24~0 1) (= 5 ~a15~0) (or (= |ULTIMATE.start_calculate_output_~input#1| 6) (= |ULTIMATE.start_calculate_output_~input#1| 2) (= |ULTIMATE.start_calculate_output_~input#1| 1) (= |ULTIMATE.start_calculate_output_~input#1| 3) (= |ULTIMATE.start_calculate_output_~input#1| 4) (= |ULTIMATE.start_calculate_output_~input#1| 5)) (= ~a21~0 10))' at error location [2024-11-14 04:01:34,454 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:01:34,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:01:34,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-14 04:01:34,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313952811] [2024-11-14 04:01:34,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:01:34,456 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-14 04:01:34,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:01:34,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-14 04:01:34,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2024-11-14 04:01:34,457 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:01:34,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:01:34,836 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2024-11-14 04:01:34,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 04:01:34,837 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 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 9 [2024-11-14 04:01:34,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:01:34,840 INFO L225 Difference]: With dead ends: 21 [2024-11-14 04:01:34,840 INFO L226 Difference]: Without dead ends: 19 [2024-11-14 04:01:34,840 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2024-11-14 04:01:34,841 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 7 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:01:34,841 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 16 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:01:34,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-11-14 04:01:34,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2024-11-14 04:01:34,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:01:34,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2024-11-14 04:01:34,852 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 9 [2024-11-14 04:01:34,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:01:34,853 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2024-11-14 04:01:34,853 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:01:34,853 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2024-11-14 04:01:34,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-14 04:01:34,854 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:01:34,854 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1] [2024-11-14 04:01:34,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d262664b-1e70-4824-b722-55843f0f4f1b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-14 04:01:35,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d262664b-1e70-4824-b722-55843f0f4f1b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:01:35,055 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:01:35,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:01:35,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1401995780, now seen corresponding path program 2 times [2024-11-14 04:01:35,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:01:35,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650285311] [2024-11-14 04:01:35,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:01:35,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:01:35,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:02:53,748 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:02:53,748 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:02:53,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650285311] [2024-11-14 04:02:53,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650285311] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:02:53,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317495477] [2024-11-14 04:02:53,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:02:53,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:02:53,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d262664b-1e70-4824-b722-55843f0f4f1b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:02:53,751 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d262664b-1e70-4824-b722-55843f0f4f1b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:02:53,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d262664b-1e70-4824-b722-55843f0f4f1b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 04:02:53,869 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 04:02:53,870 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:02:53,872 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-14 04:02:53,878 INFO L278 TraceCheckSpWp]: Computing forward predicates...