./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-industry-pattern/aiob_2.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_891a5b3d-d8cc-4de5-a10e-d48a7e15ef79/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_891a5b3d-d8cc-4de5-a10e-d48a7e15ef79/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_891a5b3d-d8cc-4de5-a10e-d48a7e15ef79/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_891a5b3d-d8cc-4de5-a10e-d48a7e15ef79/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-industry-pattern/aiob_2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_891a5b3d-d8cc-4de5-a10e-d48a7e15ef79/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_891a5b3d-d8cc-4de5-a10e-d48a7e15ef79/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 026c555e7fee0226e2a759c30119467d21d68b18e5fa50b91855a2cfe8505a9d --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:33:53,538 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:33:53,657 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_891a5b3d-d8cc-4de5-a10e-d48a7e15ef79/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 04:33:53,664 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:33:53,665 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:33:53,717 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:33:53,719 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:33:53,720 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:33:53,720 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:33:53,720 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:33:53,720 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:33:53,720 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:33:53,721 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:33:53,721 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 04:33:53,721 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:33:53,721 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:33:53,721 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 04:33:53,721 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 04:33:53,721 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:33:53,721 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 04:33:53,722 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 04:33:53,722 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 04:33:53,725 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:33:53,725 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 04:33:53,725 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 04:33:53,726 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 04:33:53,726 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 04:33:53,726 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:33:53,726 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 04:33:53,727 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:33:53,727 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 04:33:53,727 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:33:53,727 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 04:33:53,727 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 04:33:53,727 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:33:53,728 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:33:53,728 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:33:53,729 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:33:53,729 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:33:53,729 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:33:53,730 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:33:53,730 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 04:33:53,730 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 04:33:53,730 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 04:33:53,730 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:33:53,730 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:33:53,730 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 04:33:53,730 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_891a5b3d-d8cc-4de5-a10e-d48a7e15ef79/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 -> 026c555e7fee0226e2a759c30119467d21d68b18e5fa50b91855a2cfe8505a9d [2024-11-14 04:33:54,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:33:54,120 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:33:54,126 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:33:54,129 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:33:54,130 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:33:54,132 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_891a5b3d-d8cc-4de5-a10e-d48a7e15ef79/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/loop-industry-pattern/aiob_2.c Unable to find full path for "g++" [2024-11-14 04:33:56,583 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:33:56,934 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:33:56,939 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_891a5b3d-d8cc-4de5-a10e-d48a7e15ef79/sv-benchmarks/c/loop-industry-pattern/aiob_2.c [2024-11-14 04:33:56,950 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_891a5b3d-d8cc-4de5-a10e-d48a7e15ef79/bin/utaipan-verify-sOmjnqqW8E/data/224e83307/8c06dce3b5e84488b5cabde81222d4cc/FLAG3976b3878 [2024-11-14 04:33:56,980 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_891a5b3d-d8cc-4de5-a10e-d48a7e15ef79/bin/utaipan-verify-sOmjnqqW8E/data/224e83307/8c06dce3b5e84488b5cabde81222d4cc [2024-11-14 04:33:56,985 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:33:56,987 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:33:56,989 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:33:56,990 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:33:57,000 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:33:57,002 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:33:56" (1/1) ... [2024-11-14 04:33:57,005 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@436c24da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:33:57, skipping insertion in model container [2024-11-14 04:33:57,005 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:33:56" (1/1) ... [2024-11-14 04:33:57,046 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:33:57,493 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_891a5b3d-d8cc-4de5-a10e-d48a7e15ef79/sv-benchmarks/c/loop-industry-pattern/aiob_2.c[7657,7670] [2024-11-14 04:33:57,498 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:33:57,511 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:33:57,601 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_891a5b3d-d8cc-4de5-a10e-d48a7e15ef79/sv-benchmarks/c/loop-industry-pattern/aiob_2.c[7657,7670] [2024-11-14 04:33:57,602 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:33:57,624 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:33:57,625 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:33:57 WrapperNode [2024-11-14 04:33:57,625 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:33:57,627 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:33:57,627 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:33:57,627 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:33:57,637 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:33:57" (1/1) ... [2024-11-14 04:33:57,654 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:33:57" (1/1) ... [2024-11-14 04:33:57,719 INFO L138 Inliner]: procedures = 21, calls = 242, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 354 [2024-11-14 04:33:57,720 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:33:57,721 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:33:57,721 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:33:57,721 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:33:57,729 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:33:57" (1/1) ... [2024-11-14 04:33:57,729 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:33:57" (1/1) ... [2024-11-14 04:33:57,741 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:33:57" (1/1) ... [2024-11-14 04:33:57,741 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:33:57" (1/1) ... [2024-11-14 04:33:57,780 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:33:57" (1/1) ... [2024-11-14 04:33:57,788 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:33:57" (1/1) ... [2024-11-14 04:33:57,794 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:33:57" (1/1) ... [2024-11-14 04:33:57,796 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:33:57" (1/1) ... [2024-11-14 04:33:57,802 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:33:57,803 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:33:57,803 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:33:57,803 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:33:57,804 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:33:57" (1/1) ... [2024-11-14 04:33:57,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:33:57,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_891a5b3d-d8cc-4de5-a10e-d48a7e15ef79/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:33:57,844 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_891a5b3d-d8cc-4de5-a10e-d48a7e15ef79/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:33:57,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_891a5b3d-d8cc-4de5-a10e-d48a7e15ef79/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:33:57,882 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-14 04:33:57,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 04:33:57,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 04:33:57,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2024-11-14 04:33:57,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 04:33:57,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2024-11-14 04:33:57,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:33:57,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:33:57,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 04:33:57,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 04:33:58,093 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:33:58,096 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:34:01,770 INFO L? ?]: Removed 34 outVars from TransFormulas that were not future-live. [2024-11-14 04:34:01,770 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:34:01,825 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:34:01,825 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-14 04:34:01,826 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:34:01 BoogieIcfgContainer [2024-11-14 04:34:01,826 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:34:01,833 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:34:01,834 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:34:01,839 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:34:01,840 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:33:56" (1/3) ... [2024-11-14 04:34:01,842 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e799c57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:34:01, skipping insertion in model container [2024-11-14 04:34:01,842 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:33:57" (2/3) ... [2024-11-14 04:34:01,842 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e799c57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:34:01, skipping insertion in model container [2024-11-14 04:34:01,843 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:34:01" (3/3) ... [2024-11-14 04:34:01,845 INFO L112 eAbstractionObserver]: Analyzing ICFG aiob_2.c [2024-11-14 04:34:01,866 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:34:01,870 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG aiob_2.c that has 1 procedures, 11 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2024-11-14 04:34:01,946 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:34:01,966 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;@d5b0bea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:34:01,968 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 04:34:01,973 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 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 04:34:01,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-14 04:34:01,982 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:34:01,982 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-14 04:34:01,983 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:34:01,990 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:34:01,991 INFO L85 PathProgramCache]: Analyzing trace with hash 2068107206, now seen corresponding path program 1 times [2024-11-14 04:34:02,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:34:02,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389439839] [2024-11-14 04:34:02,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:34:02,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:34:17,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:34:19,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:34:19,622 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:34:19,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389439839] [2024-11-14 04:34:19,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389439839] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:34:19,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:34:19,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 04:34:19,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633336899] [2024-11-14 04:34:19,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:34:19,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:34:19,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:34:19,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:34:19,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:34:19,665 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 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 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 04:34:19,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:34:19,826 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2024-11-14 04:34:19,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:34:19,830 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2024-11-14 04:34:19,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:34:19,839 INFO L225 Difference]: With dead ends: 25 [2024-11-14 04:34:19,840 INFO L226 Difference]: Without dead ends: 12 [2024-11-14 04:34:19,844 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:34:19,849 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:34:19,850 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 14 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:34:19,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2024-11-14 04:34:19,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2024-11-14 04:34:19,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 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 04:34:19,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2024-11-14 04:34:19,890 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 6 [2024-11-14 04:34:19,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:34:19,890 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2024-11-14 04:34:19,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 04:34:19,891 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2024-11-14 04:34:19,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 04:34:19,892 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:34:19,892 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-11-14 04:34:19,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 04:34:19,893 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:34:19,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:34:19,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1296654982, now seen corresponding path program 1 times [2024-11-14 04:34:19,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:34:19,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879852881] [2024-11-14 04:34:19,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:34:19,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:34:32,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:34:34,695 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 04:34:34,695 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:34:34,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879852881] [2024-11-14 04:34:34,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879852881] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:34:34,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672594564] [2024-11-14 04:34:34,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:34:34,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:34:34,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_891a5b3d-d8cc-4de5-a10e-d48a7e15ef79/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:34:34,702 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_891a5b3d-d8cc-4de5-a10e-d48a7e15ef79/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:34:34,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_891a5b3d-d8cc-4de5-a10e-d48a7e15ef79/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process