./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test24-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81787975-0b36-41d3-afa3-922ea045d7ed/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81787975-0b36-41d3-afa3-922ea045d7ed/bin/utaipan-verify-FOvIYxoinp/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81787975-0b36-41d3-afa3-922ea045d7ed/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81787975-0b36-41d3-afa3-922ea045d7ed/bin/utaipan-verify-FOvIYxoinp/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/test24-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81787975-0b36-41d3-afa3-922ea045d7ed/bin/utaipan-verify-FOvIYxoinp/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81787975-0b36-41d3-afa3-922ea045d7ed/bin/utaipan-verify-FOvIYxoinp --witnessprinter.witness.filename witness.graphml --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 ba9918f9236391a08a9d6d8a63aa823d4042d99b397d7843518d83dccab2fbf8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:08:21,915 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:08:21,987 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81787975-0b36-41d3-afa3-922ea045d7ed/bin/utaipan-verify-FOvIYxoinp/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-06 21:08:21,993 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:08:21,994 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:08:22,031 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:08:22,032 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:08:22,033 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:08:22,033 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:08:22,034 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:08:22,035 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 21:08:22,035 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 21:08:22,036 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 21:08:22,037 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 21:08:22,037 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 21:08:22,038 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 21:08:22,038 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 21:08:22,039 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 21:08:22,040 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 21:08:22,041 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 21:08:22,041 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 21:08:22,042 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 21:08:22,043 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:08:22,044 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:08:22,045 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:08:22,045 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:08:22,046 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:08:22,047 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:08:22,047 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:08:22,048 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:08:22,049 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:08:22,049 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:08:22,050 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:08:22,051 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:08:22,051 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:08:22,052 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:08:22,052 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:08:22,053 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:08:22,053 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:08:22,054 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:08:22,054 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 21:08:22,055 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:08:22,055 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:08:22,055 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 21:08:22,056 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:08:22,056 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81787975-0b36-41d3-afa3-922ea045d7ed/bin/utaipan-verify-FOvIYxoinp/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81787975-0b36-41d3-afa3-922ea045d7ed/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ba9918f9236391a08a9d6d8a63aa823d4042d99b397d7843518d83dccab2fbf8 [2023-11-06 21:08:22,339 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:08:22,379 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:08:22,382 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:08:22,383 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:08:22,384 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:08:22,386 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81787975-0b36-41d3-afa3-922ea045d7ed/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/ldv-regression/test24-2.c [2023-11-06 21:08:25,666 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:08:25,875 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:08:25,876 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81787975-0b36-41d3-afa3-922ea045d7ed/sv-benchmarks/c/ldv-regression/test24-2.c [2023-11-06 21:08:25,887 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81787975-0b36-41d3-afa3-922ea045d7ed/bin/utaipan-verify-FOvIYxoinp/data/ade03ab9e/c49453c874f7445f962341d9ce8ffe15/FLAG01ca9fb25 [2023-11-06 21:08:25,906 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81787975-0b36-41d3-afa3-922ea045d7ed/bin/utaipan-verify-FOvIYxoinp/data/ade03ab9e/c49453c874f7445f962341d9ce8ffe15 [2023-11-06 21:08:25,917 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:08:25,919 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:08:25,923 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:08:25,923 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:08:25,928 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:08:25,929 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:08:25" (1/1) ... [2023-11-06 21:08:25,930 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b1bc236 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:08:25, skipping insertion in model container [2023-11-06 21:08:25,931 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:08:25" (1/1) ... [2023-11-06 21:08:25,961 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:08:26,182 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81787975-0b36-41d3-afa3-922ea045d7ed/sv-benchmarks/c/ldv-regression/test24-2.c[807,820] [2023-11-06 21:08:26,188 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:08:26,199 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:08:26,229 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81787975-0b36-41d3-afa3-922ea045d7ed/sv-benchmarks/c/ldv-regression/test24-2.c[807,820] [2023-11-06 21:08:26,236 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:08:26,252 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:08:26,253 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:08:26 WrapperNode [2023-11-06 21:08:26,253 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:08:26,254 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:08:26,255 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:08:26,255 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:08:26,263 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:08:26" (1/1) ... [2023-11-06 21:08:26,271 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:08:26" (1/1) ... [2023-11-06 21:08:26,297 INFO L138 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 76 [2023-11-06 21:08:26,297 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:08:26,298 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:08:26,298 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:08:26,298 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:08:26,308 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:08:26" (1/1) ... [2023-11-06 21:08:26,309 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:08:26" (1/1) ... [2023-11-06 21:08:26,321 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:08:26" (1/1) ... [2023-11-06 21:08:26,322 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:08:26" (1/1) ... [2023-11-06 21:08:26,327 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:08:26" (1/1) ... [2023-11-06 21:08:26,333 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:08:26" (1/1) ... [2023-11-06 21:08:26,342 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:08:26" (1/1) ... [2023-11-06 21:08:26,345 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:08:26" (1/1) ... [2023-11-06 21:08:26,347 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:08:26,349 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:08:26,350 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:08:26,350 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:08:26,351 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:08:26" (1/1) ... [2023-11-06 21:08:26,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:08:26,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81787975-0b36-41d3-afa3-922ea045d7ed/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:08:26,387 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81787975-0b36-41d3-afa3-922ea045d7ed/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:08:26,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81787975-0b36-41d3-afa3-922ea045d7ed/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:08:26,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:08:26,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:08:26,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 21:08:26,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 21:08:26,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:08:26,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:08:26,437 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 21:08:26,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 21:08:26,512 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:08:26,514 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:08:26,692 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:08:26,746 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:08:26,746 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 21:08:26,749 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:08:26 BoogieIcfgContainer [2023-11-06 21:08:26,749 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:08:26,752 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:08:26,752 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:08:26,756 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:08:26,756 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:08:25" (1/3) ... [2023-11-06 21:08:26,757 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35a7922a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:08:26, skipping insertion in model container [2023-11-06 21:08:26,758 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:08:26" (2/3) ... [2023-11-06 21:08:26,758 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35a7922a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:08:26, skipping insertion in model container [2023-11-06 21:08:26,758 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:08:26" (3/3) ... [2023-11-06 21:08:26,760 INFO L112 eAbstractionObserver]: Analyzing ICFG test24-2.c [2023-11-06 21:08:26,782 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:08:26,782 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 21:08:26,834 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:08:26,842 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@38bbc8d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 21:08:26,842 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 21:08:26,847 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:26,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-06 21:08:26,854 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:08:26,855 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:08:26,855 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:08:26,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:08:26,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1137348052, now seen corresponding path program 1 times [2023-11-06 21:08:26,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:08:26,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815745488] [2023-11-06 21:08:26,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:08:26,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:08:26,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:08:27,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:08:27,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:08:27,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815745488] [2023-11-06 21:08:27,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815745488] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:08:27,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:08:27,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:08:27,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599792411] [2023-11-06 21:08:27,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:08:27,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:08:27,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:08:27,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:08:27,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:08:27,137 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:27,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:08:27,174 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2023-11-06 21:08:27,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:08:27,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2023-11-06 21:08:27,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:08:27,186 INFO L225 Difference]: With dead ends: 23 [2023-11-06 21:08:27,186 INFO L226 Difference]: Without dead ends: 10 [2023-11-06 21:08:27,189 INFO L412 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 [2023-11-06 21:08:27,193 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:08:27,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:08:27,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-11-06 21:08:27,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-11-06 21:08:27,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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) [2023-11-06 21:08:27,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2023-11-06 21:08:27,280 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2023-11-06 21:08:27,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:08:27,281 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2023-11-06 21:08:27,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:27,297 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2023-11-06 21:08:27,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-06 21:08:27,298 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:08:27,298 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:08:27,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:08:27,299 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:08:27,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:08:27,300 INFO L85 PathProgramCache]: Analyzing trace with hash 209234143, now seen corresponding path program 1 times [2023-11-06 21:08:27,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:08:27,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604790135] [2023-11-06 21:08:27,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:08:27,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:08:27,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:08:27,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:08:27,461 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:08:27,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604790135] [2023-11-06 21:08:27,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604790135] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:08:27,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092335069] [2023-11-06 21:08:27,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:08:27,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:08:27,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81787975-0b36-41d3-afa3-922ea045d7ed/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:08:27,467 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81787975-0b36-41d3-afa3-922ea045d7ed/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:08:27,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81787975-0b36-41d3-afa3-922ea045d7ed/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:08:27,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:08:27,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 21:08:27,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:08:27,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:08:27,629 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:08:27,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:08:27,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092335069] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:08:27,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [444811440] [2023-11-06 21:08:27,677 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-06 21:08:27,678 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 21:08:27,682 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 21:08:27,688 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 21:08:27,689 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 21:08:28,360 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 21:08:28,798 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '121#(and (<= 20 |ULTIMATE.start_main_~j~0#1|) (<= 1 |#StackHeapBarrier|) (exists ((|v_#memory_int_22| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_22| |ULTIMATE.start_main_~#ad1~0#1.base| (store (select |v_#memory_int_22| |ULTIMATE.start_main_~#ad1~0#1.base|) (* (div |ULTIMATE.start_main_~pa~0#1.offset| 8) 8) (div |ULTIMATE.start_main_~pa~0#1.offset| 8))))) (<= 2 |ULTIMATE.start_main_~#ad1~0#1.base|) (<= (div |ULTIMATE.start_main_~pa~0#1.offset| 8) 9) (not (= |ULTIMATE.start_main_~i~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#ad1~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 8)))) (<= 0 (div |ULTIMATE.start_main_~pa~0#1.offset| 8)) (= (+ 10 (select (select |#memory_int| |ULTIMATE.start_main_~ad2~0#1.base|) (* (div |ULTIMATE.start_main_~pa~0#1.offset| 8) 8))) |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~ad2~0#1.offset| 0) (= |ULTIMATE.start_main_~pa~0#1.base| |ULTIMATE.start_main_~#ad1~0#1.base|) (= |ULTIMATE.start_main_~#ad1~0#1.offset| 0) (= |ULTIMATE.start_main_~ad2~0#1.base| |ULTIMATE.start_main_~#ad1~0#1.base|) (= 0 (mod |ULTIMATE.start_main_~pa~0#1.offset| 8)) (= 0 |ULTIMATE.start_check_#res#1|))' at error location [2023-11-06 21:08:28,799 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 21:08:28,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:08:28,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 21:08:28,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120896290] [2023-11-06 21:08:28,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:08:28,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 21:08:28,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:08:28,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 21:08:28,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-11-06 21:08:28,805 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 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) [2023-11-06 21:08:28,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:08:28,837 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2023-11-06 21:08:28,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:08:28,838 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 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) Word has length 9 [2023-11-06 21:08:28,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:08:28,838 INFO L225 Difference]: With dead ends: 20 [2023-11-06 21:08:28,839 INFO L226 Difference]: Without dead ends: 13 [2023-11-06 21:08:28,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-11-06 21:08:28,844 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:08:28,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:08:28,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-11-06 21:08:28,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-11-06 21:08:28,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 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) [2023-11-06 21:08:28,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2023-11-06 21:08:28,850 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2023-11-06 21:08:28,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:08:28,850 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2023-11-06 21:08:28,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 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) [2023-11-06 21:08:28,851 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2023-11-06 21:08:28,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-06 21:08:28,851 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:08:28,852 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:08:28,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81787975-0b36-41d3-afa3-922ea045d7ed/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:08:29,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81787975-0b36-41d3-afa3-922ea045d7ed/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:08:29,057 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:08:29,058 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:08:29,058 INFO L85 PathProgramCache]: Analyzing trace with hash -903757174, now seen corresponding path program 2 times [2023-11-06 21:08:29,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:08:29,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931788954] [2023-11-06 21:08:29,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:08:29,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:08:29,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:08:29,246 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:08:29,246 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:08:29,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931788954] [2023-11-06 21:08:29,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931788954] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:08:29,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477283482] [2023-11-06 21:08:29,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:08:29,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:08:29,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81787975-0b36-41d3-afa3-922ea045d7ed/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:08:29,249 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81787975-0b36-41d3-afa3-922ea045d7ed/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:08:29,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81787975-0b36-41d3-afa3-922ea045d7ed/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:08:29,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 21:08:29,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:08:29,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 21:08:29,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:08:29,365 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:08:29,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:08:29,440 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:08:29,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477283482] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:08:29,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1085641291] [2023-11-06 21:08:29,448 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-06 21:08:29,449 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 21:08:29,449 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 21:08:29,449 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 21:08:29,450 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 21:08:29,773 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 21:08:30,224 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '258#(and (<= 20 |ULTIMATE.start_main_~j~0#1|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~0#1| (+ (select (select |#memory_int| |ULTIMATE.start_main_~ad2~0#1.base|) (* (div (* (- 1) |ULTIMATE.start_main_~pa~0#1.offset|) 8) (- 8))) 10)) (= (mod (* 7 |ULTIMATE.start_main_~pa~0#1.offset|) 8) 0) (<= 2 |ULTIMATE.start_main_~#ad1~0#1.base|) (not (= |ULTIMATE.start_main_~i~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#ad1~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 8)))) (= |ULTIMATE.start_main_~ad2~0#1.offset| 0) (= |ULTIMATE.start_main_~pa~0#1.base| |ULTIMATE.start_main_~#ad1~0#1.base|) (= |ULTIMATE.start_main_~#ad1~0#1.offset| 0) (= |ULTIMATE.start_main_~ad2~0#1.base| |ULTIMATE.start_main_~#ad1~0#1.base|) (= 0 |ULTIMATE.start_check_#res#1|) (<= (div (* (- 1) |ULTIMATE.start_main_~pa~0#1.offset|) 8) 0) (exists ((|v_#memory_int_31| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_31| |ULTIMATE.start_main_~#ad1~0#1.base| (store (select |v_#memory_int_31| |ULTIMATE.start_main_~#ad1~0#1.base|) (* (div (* (- 1) |ULTIMATE.start_main_~pa~0#1.offset|) 8) (- 8)) (* (- 1) (div (* (- 1) |ULTIMATE.start_main_~pa~0#1.offset|) 8)))))) (<= 0 (+ (div (* (- 1) |ULTIMATE.start_main_~pa~0#1.offset|) 8) 9)))' at error location [2023-11-06 21:08:30,224 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 21:08:30,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:08:30,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-06 21:08:30,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375004332] [2023-11-06 21:08:30,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:08:30,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 21:08:30,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:08:30,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 21:08:30,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2023-11-06 21:08:30,227 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:30,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:08:30,258 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2023-11-06 21:08:30,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 21:08:30,259 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 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 12 [2023-11-06 21:08:30,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:08:30,260 INFO L225 Difference]: With dead ends: 26 [2023-11-06 21:08:30,260 INFO L226 Difference]: Without dead ends: 19 [2023-11-06 21:08:30,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2023-11-06 21:08:30,262 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:08:30,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:08:30,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-06 21:08:30,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-06 21:08:30,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:30,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2023-11-06 21:08:30,268 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 12 [2023-11-06 21:08:30,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:08:30,268 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2023-11-06 21:08:30,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:30,268 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2023-11-06 21:08:30,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-06 21:08:30,269 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:08:30,269 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:08:30,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81787975-0b36-41d3-afa3-922ea045d7ed/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:08:30,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81787975-0b36-41d3-afa3-922ea045d7ed/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:08:30,476 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:08:30,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:08:30,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1207979414, now seen corresponding path program 3 times [2023-11-06 21:08:30,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:08:30,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021132670] [2023-11-06 21:08:30,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:08:30,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:08:30,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:08:30,858 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:08:30,858 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:08:30,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021132670] [2023-11-06 21:08:30,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021132670] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:08:30,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369297073] [2023-11-06 21:08:30,859 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:08:30,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:08:30,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81787975-0b36-41d3-afa3-922ea045d7ed/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:08:30,862 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81787975-0b36-41d3-afa3-922ea045d7ed/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:08:30,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81787975-0b36-41d3-afa3-922ea045d7ed/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:08:30,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:08:30,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:08:30,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 21:08:30,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:08:31,016 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:08:31,016 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:08:31,243 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:08:31,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369297073] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:08:31,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [732314227] [2023-11-06 21:08:31,246 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-06 21:08:31,246 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 21:08:31,247 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 21:08:31,247 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 21:08:31,247 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 21:08:31,450 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 21:08:31,900 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '465#(and (<= 20 |ULTIMATE.start_main_~j~0#1|) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#ad1~0#1.base|) (<= (div |ULTIMATE.start_main_~pa~0#1.offset| 8) 9) (not (= |ULTIMATE.start_main_~i~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#ad1~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 8)))) (<= 0 (div |ULTIMATE.start_main_~pa~0#1.offset| 8)) (= (+ 10 (select (select |#memory_int| |ULTIMATE.start_main_~ad2~0#1.base|) (* (div |ULTIMATE.start_main_~pa~0#1.offset| 8) 8))) |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~ad2~0#1.offset| 0) (= |ULTIMATE.start_main_~pa~0#1.base| |ULTIMATE.start_main_~#ad1~0#1.base|) (= |ULTIMATE.start_main_~#ad1~0#1.offset| 0) (exists ((|v_#memory_int_46| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_46| |ULTIMATE.start_main_~#ad1~0#1.base| (store (select |v_#memory_int_46| |ULTIMATE.start_main_~#ad1~0#1.base|) (* (div |ULTIMATE.start_main_~pa~0#1.offset| 8) 8) (div |ULTIMATE.start_main_~pa~0#1.offset| 8))))) (= |ULTIMATE.start_main_~ad2~0#1.base| |ULTIMATE.start_main_~#ad1~0#1.base|) (= 0 (mod |ULTIMATE.start_main_~pa~0#1.offset| 8)) (= 0 |ULTIMATE.start_check_#res#1|))' at error location [2023-11-06 21:08:31,901 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 21:08:31,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:08:31,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2023-11-06 21:08:31,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804046123] [2023-11-06 21:08:31,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:08:31,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 21:08:31,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:08:31,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 21:08:31,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=535, Unknown=0, NotChecked=0, Total=812 [2023-11-06 21:08:31,904 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:31,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:08:31,960 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2023-11-06 21:08:31,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 21:08:31,961 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 states have internal predecessors, (31), 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 18 [2023-11-06 21:08:31,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:08:31,962 INFO L225 Difference]: With dead ends: 36 [2023-11-06 21:08:31,962 INFO L226 Difference]: Without dead ends: 29 [2023-11-06 21:08:31,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=277, Invalid=535, Unknown=0, NotChecked=0, Total=812 [2023-11-06 21:08:31,964 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:08:31,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:08:31,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-06 21:08:31,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-11-06 21:08:31,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:31,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2023-11-06 21:08:31,971 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 18 [2023-11-06 21:08:31,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:08:31,971 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2023-11-06 21:08:31,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:08:31,972 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2023-11-06 21:08:31,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-06 21:08:31,973 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:08:31,973 INFO L195 NwaCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:08:31,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81787975-0b36-41d3-afa3-922ea045d7ed/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 21:08:32,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81787975-0b36-41d3-afa3-922ea045d7ed/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:08:32,180 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:08:32,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:08:32,181 INFO L85 PathProgramCache]: Analyzing trace with hash -296323190, now seen corresponding path program 4 times [2023-11-06 21:08:32,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:08:32,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087905857] [2023-11-06 21:08:32,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:08:32,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:08:32,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 21:08:32,327 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 21:08:32,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 21:08:32,493 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-06 21:08:32,493 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 21:08:32,495 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-06 21:08:32,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 21:08:32,500 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1] [2023-11-06 21:08:32,504 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-06 21:08:32,537 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 09:08:32 BoogieIcfgContainer [2023-11-06 21:08:32,537 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-06 21:08:32,538 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-06 21:08:32,538 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-06 21:08:32,538 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-06 21:08:32,539 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:08:26" (3/4) ... [2023-11-06 21:08:32,540 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-06 21:08:32,592 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81787975-0b36-41d3-afa3-922ea045d7ed/bin/utaipan-verify-FOvIYxoinp/witness.graphml.graphml [2023-11-06 21:08:32,592 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-06 21:08:32,593 INFO L158 Benchmark]: Toolchain (without parser) took 6673.83ms. Allocated memory was 130.0MB in the beginning and 174.1MB in the end (delta: 44.0MB). Free memory was 91.9MB in the beginning and 46.2MB in the end (delta: 45.7MB). Peak memory consumption was 90.7MB. Max. memory is 16.1GB. [2023-11-06 21:08:32,593 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 130.0MB. Free memory is still 75.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 21:08:32,594 INFO L158 Benchmark]: CACSL2BoogieTranslator took 330.75ms. Allocated memory is still 130.0MB. Free memory was 91.9MB in the beginning and 80.8MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 21:08:32,594 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.21ms. Allocated memory is still 130.0MB. Free memory was 80.8MB in the beginning and 79.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 21:08:32,595 INFO L158 Benchmark]: Boogie Preprocessor took 50.09ms. Allocated memory is still 130.0MB. Free memory was 79.3MB in the beginning and 77.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 21:08:32,595 INFO L158 Benchmark]: RCFGBuilder took 400.41ms. Allocated memory is still 130.0MB. Free memory was 77.7MB in the beginning and 64.6MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-06 21:08:32,596 INFO L158 Benchmark]: TraceAbstraction took 5785.69ms. Allocated memory was 130.0MB in the beginning and 174.1MB in the end (delta: 44.0MB). Free memory was 64.1MB in the beginning and 49.4MB in the end (delta: 14.7MB). Peak memory consumption was 61.3MB. Max. memory is 16.1GB. [2023-11-06 21:08:32,596 INFO L158 Benchmark]: Witness Printer took 54.34ms. Allocated memory is still 174.1MB. Free memory was 49.4MB in the beginning and 46.2MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 21:08:32,598 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 130.0MB. Free memory is still 75.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 330.75ms. Allocated memory is still 130.0MB. Free memory was 91.9MB in the beginning and 80.8MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 43.21ms. Allocated memory is still 130.0MB. Free memory was 80.8MB in the beginning and 79.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 50.09ms. Allocated memory is still 130.0MB. Free memory was 79.3MB in the beginning and 77.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 400.41ms. Allocated memory is still 130.0MB. Free memory was 77.7MB in the beginning and 64.6MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 5785.69ms. Allocated memory was 130.0MB in the beginning and 174.1MB in the end (delta: 44.0MB). Free memory was 64.1MB in the beginning and 49.4MB in the end (delta: 14.7MB). Peak memory consumption was 61.3MB. Max. memory is 16.1GB. * Witness Printer took 54.34ms. Allocated memory is still 174.1MB. Free memory was 49.4MB in the beginning and 46.2MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 39]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] struct dummy ad1[20], *ad2; [L18] int i, j, *pa; [L19] j=0 VAL [ad1={5:0}, j=0] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=1] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=2] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=3] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=4] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=5] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=6] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=7] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=8] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=9] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=10] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=11] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=12] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=13] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=14] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=15] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=16] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=17] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=18] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=19] [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ VAL [ad1={5:0}, j=20] [L19] COND FALSE !(j<20) [L23] i = __VERIFIER_nondet_int() [L24] COND TRUE i >= 0 && i < 10 [L25] ad2 = ad1 [L26] ad1[i].a = i [L27] pa = &ad1[i].a [L28] EXPR ad2[i].a [L28] i = ad2[i].a + 10 [L29] EXPR \read(*pa) VAL [\read(*pa)=0, ad1={5:0}, ad2={5:0}, i=10, j=20, pa={5:0}] [L29] COND FALSE !(i < *pa) [L32] CALL, EXPR check(ad1, i) [L12] EXPR ad1[b].a [L12] return ad1[b].a == b; [L32] RET, EXPR check(ad1, i) [L32] COND TRUE !check(ad1, i) [L39] reach_error() VAL [ad1={5:0}, ad2={5:0}, i=10, j=20, pa={5:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.7s, OverallIterations: 5, TraceHistogramMax: 20, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 90 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 63 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 73 IncrementalHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 27 mSDtfsCounter, 73 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 134 GetRequests, 73 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=4, InterpolantAutomatonStates: 43, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 113 NumberOfCodeBlocks, 113 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 114 ConstructedInterpolants, 0 QuantifiedInterpolants, 224 SizeOfPredicates, 0 NumberOfNonLiveVariables, 393 ConjunctsInSsa, 21 ConjunctsInUnsatCore, 10 InterpolantComputations, 1 PerfectInterpolantSequences, 0/198 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-11-06 21:08:32,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81787975-0b36-41d3-afa3-922ea045d7ed/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE