./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 30e01a73 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_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ef4a52e45666a829b602608a46cff9c8137910dd58bdfaebe016ce17984d1ac8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:08:59,358 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:08:59,488 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-23 21:08:59,499 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:08:59,500 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:08:59,539 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:08:59,540 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:08:59,540 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:08:59,541 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:08:59,547 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:08:59,547 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:08:59,548 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:08:59,548 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:08:59,550 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:08:59,550 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:08:59,551 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:08:59,551 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:08:59,551 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:08:59,552 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:08:59,552 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:08:59,553 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:08:59,554 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:08:59,554 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 21:08:59,555 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 21:08:59,556 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:08:59,556 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:08:59,557 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:08:59,557 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:08:59,557 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:08:59,558 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-23 21:08:59,559 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-23 21:08:59,559 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-23 21:08:59,560 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:08:59,560 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 21:08:59,560 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 21:08:59,560 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:08:59,561 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:08:59,561 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:08:59,561 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:08:59,561 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:08:59,562 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:08:59,562 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:08:59,562 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:08:59,563 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:08:59,563 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:08:59,564 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:08:59,564 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:08:59,564 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:08:59,564 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_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef4a52e45666a829b602608a46cff9c8137910dd58bdfaebe016ce17984d1ac8 [2023-11-23 21:08:59,816 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:08:59,847 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:08:59,851 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:08:59,852 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:08:59,853 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:08:59,854 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.c [2023-11-23 21:09:02,972 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:09:03,184 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:09:03,185 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.c [2023-11-23 21:09:03,193 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/data/88090475e/985b20015da548de8099bb31c90d8ff6/FLAGdc3ecae7b [2023-11-23 21:09:03,207 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/data/88090475e/985b20015da548de8099bb31c90d8ff6 [2023-11-23 21:09:03,210 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:09:03,211 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:09:03,213 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:09:03,213 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:09:03,218 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:09:03,219 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:09:03" (1/1) ... [2023-11-23 21:09:03,220 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dcbc9f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:03, skipping insertion in model container [2023-11-23 21:09:03,221 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:09:03" (1/1) ... [2023-11-23 21:09:03,240 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:09:03,428 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:09:03,438 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:09:03,456 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:09:03,471 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:09:03,472 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:03 WrapperNode [2023-11-23 21:09:03,472 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:09:03,474 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:09:03,474 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:09:03,474 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:09:03,482 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:03" (1/1) ... [2023-11-23 21:09:03,490 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:03" (1/1) ... [2023-11-23 21:09:03,510 INFO L138 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 66 [2023-11-23 21:09:03,510 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:09:03,511 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:09:03,511 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:09:03,511 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:09:03,520 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:03" (1/1) ... [2023-11-23 21:09:03,521 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:03" (1/1) ... [2023-11-23 21:09:03,523 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:03" (1/1) ... [2023-11-23 21:09:03,523 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:03" (1/1) ... [2023-11-23 21:09:03,528 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:03" (1/1) ... [2023-11-23 21:09:03,532 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:03" (1/1) ... [2023-11-23 21:09:03,534 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:03" (1/1) ... [2023-11-23 21:09:03,535 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:03" (1/1) ... [2023-11-23 21:09:03,537 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:09:03,538 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:09:03,538 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:09:03,539 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:09:03,539 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:03" (1/1) ... [2023-11-23 21:09:03,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:09:03,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:03,584 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:09:03,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:09:03,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:09:03,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:09:03,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:09:03,638 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:09:03,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:09:03,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:09:03,724 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:09:03,727 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:09:03,989 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:09:04,064 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:09:04,068 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-23 21:09:04,072 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:09:04 BoogieIcfgContainer [2023-11-23 21:09:04,072 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:09:04,075 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:09:04,075 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:09:04,079 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:09:04,079 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:09:03" (1/3) ... [2023-11-23 21:09:04,080 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e1e0213 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:09:04, skipping insertion in model container [2023-11-23 21:09:04,080 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:03" (2/3) ... [2023-11-23 21:09:04,080 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e1e0213 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:09:04, skipping insertion in model container [2023-11-23 21:09:04,081 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:09:04" (3/3) ... [2023-11-23 21:09:04,082 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration.c [2023-11-23 21:09:04,102 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:09:04,103 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-11-23 21:09:04,149 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:09:04,157 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@70f8eb27, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:09:04,157 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-23 21:09:04,171 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 10 states have (on average 2.2) internal successors, (22), 18 states have internal predecessors, (22), 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) [2023-11-23 21:09:04,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-23 21:09:04,182 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:04,183 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-23 21:09:04,184 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:09:04,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:04,194 INFO L85 PathProgramCache]: Analyzing trace with hash 3182528, now seen corresponding path program 1 times [2023-11-23 21:09:04,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:04,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004582487] [2023-11-23 21:09:04,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:04,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:04,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:04,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:04,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:04,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004582487] [2023-11-23 21:09:04,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004582487] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:04,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:04,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:09:04,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088431829] [2023-11-23 21:09:04,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:04,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:09:04,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:04,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:09:04,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:09:04,561 INFO L87 Difference]: Start difference. First operand has 19 states, 10 states have (on average 2.2) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2023-11-23 21:09:04,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:04,673 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2023-11-23 21:09:04,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:09:04,676 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2023-11-23 21:09:04,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:04,685 INFO L225 Difference]: With dead ends: 36 [2023-11-23 21:09:04,686 INFO L226 Difference]: Without dead ends: 35 [2023-11-23 21:09:04,688 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 [2023-11-23 21:09:04,692 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 16 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:04,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 16 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:09:04,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-23 21:09:04,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2023-11-23 21:09:04,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 19 states have internal predecessors, (23), 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) [2023-11-23 21:09:04,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2023-11-23 21:09:04,728 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2023-11-23 21:09:04,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:04,728 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2023-11-23 21:09:04,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2023-11-23 21:09:04,729 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2023-11-23 21:09:04,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-23 21:09:04,730 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:04,730 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-23 21:09:04,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:09:04,731 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:09:04,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:04,732 INFO L85 PathProgramCache]: Analyzing trace with hash 3108451, now seen corresponding path program 1 times [2023-11-23 21:09:04,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:04,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898951323] [2023-11-23 21:09:04,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:04,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:04,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:04,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:04,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:04,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898951323] [2023-11-23 21:09:04,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898951323] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:04,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:04,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:09:04,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844635319] [2023-11-23 21:09:04,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:04,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:09:04,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:04,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:09:04,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:09:04,834 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2023-11-23 21:09:04,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:04,871 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2023-11-23 21:09:04,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:09:04,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2023-11-23 21:09:04,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:04,873 INFO L225 Difference]: With dead ends: 25 [2023-11-23 21:09:04,873 INFO L226 Difference]: Without dead ends: 25 [2023-11-23 21:09:04,873 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 [2023-11-23 21:09:04,875 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:04,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 18 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:09:04,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-23 21:09:04,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2023-11-23 21:09:04,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 21 states have internal predecessors, (26), 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) [2023-11-23 21:09:04,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-11-23 21:09:04,882 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 4 [2023-11-23 21:09:04,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:04,882 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-11-23 21:09:04,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2023-11-23 21:09:04,882 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-11-23 21:09:04,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-23 21:09:04,883 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:04,883 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-23 21:09:04,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:09:04,884 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:09:04,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:04,885 INFO L85 PathProgramCache]: Analyzing trace with hash 3110481, now seen corresponding path program 1 times [2023-11-23 21:09:04,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:04,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698003700] [2023-11-23 21:09:04,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:04,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:04,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:05,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:05,005 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:05,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698003700] [2023-11-23 21:09:05,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698003700] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:05,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:05,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:09:05,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774769875] [2023-11-23 21:09:05,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:05,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:09:05,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:05,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:09:05,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:09:05,008 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2023-11-23 21:09:05,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:05,133 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2023-11-23 21:09:05,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:09:05,134 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2023-11-23 21:09:05,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:05,135 INFO L225 Difference]: With dead ends: 42 [2023-11-23 21:09:05,135 INFO L226 Difference]: Without dead ends: 42 [2023-11-23 21:09:05,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:09:05,138 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 25 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:05,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 17 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:09:05,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-23 21:09:05,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 23. [2023-11-23 21:09:05,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.8) internal successors, (27), 22 states have internal predecessors, (27), 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) [2023-11-23 21:09:05,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-11-23 21:09:05,147 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 4 [2023-11-23 21:09:05,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:05,152 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-11-23 21:09:05,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2023-11-23 21:09:05,152 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-11-23 21:09:05,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-23 21:09:05,153 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:05,153 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 21:09:05,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:09:05,153 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:09:05,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:05,154 INFO L85 PathProgramCache]: Analyzing trace with hash 96362034, now seen corresponding path program 1 times [2023-11-23 21:09:05,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:05,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274310811] [2023-11-23 21:09:05,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:05,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:05,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:05,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:05,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:05,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274310811] [2023-11-23 21:09:05,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274310811] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:05,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:05,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:09:05,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504394789] [2023-11-23 21:09:05,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:05,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:09:05,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:05,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:09:05,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:09:05,358 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:05,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:05,421 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2023-11-23 21:09:05,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:09:05,423 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-23 21:09:05,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:05,424 INFO L225 Difference]: With dead ends: 22 [2023-11-23 21:09:05,424 INFO L226 Difference]: Without dead ends: 22 [2023-11-23 21:09:05,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:09:05,436 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:05,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 10 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:09:05,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-23 21:09:05,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-11-23 21:09:05,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 21 states have internal predecessors, (26), 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) [2023-11-23 21:09:05,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-11-23 21:09:05,441 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 5 [2023-11-23 21:09:05,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:05,442 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-11-23 21:09:05,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:05,442 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-11-23 21:09:05,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-23 21:09:05,443 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:05,443 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 21:09:05,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:09:05,444 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:09:05,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:05,444 INFO L85 PathProgramCache]: Analyzing trace with hash 96362035, now seen corresponding path program 1 times [2023-11-23 21:09:05,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:05,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894236958] [2023-11-23 21:09:05,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:05,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:05,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:05,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:05,643 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:05,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894236958] [2023-11-23 21:09:05,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894236958] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:05,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:05,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:09:05,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424544217] [2023-11-23 21:09:05,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:05,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:09:05,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:05,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:09:05,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:09:05,646 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:05,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:05,709 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2023-11-23 21:09:05,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:09:05,710 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-23 21:09:05,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:05,711 INFO L225 Difference]: With dead ends: 23 [2023-11-23 21:09:05,711 INFO L226 Difference]: Without dead ends: 23 [2023-11-23 21:09:05,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:09:05,713 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 19 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:05,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 10 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:09:05,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-23 21:09:05,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-23 21:09:05,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.6875) internal successors, (27), 22 states have internal predecessors, (27), 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) [2023-11-23 21:09:05,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-11-23 21:09:05,718 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 5 [2023-11-23 21:09:05,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:05,719 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-11-23 21:09:05,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:05,719 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-11-23 21:09:05,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-23 21:09:05,720 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:05,720 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-23 21:09:05,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:09:05,721 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:09:05,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:05,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1885310484, now seen corresponding path program 1 times [2023-11-23 21:09:05,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:05,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508191720] [2023-11-23 21:09:05,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:05,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:05,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:05,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:05,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:05,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508191720] [2023-11-23 21:09:05,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508191720] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:09:05,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270030969] [2023-11-23 21:09:05,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:05,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:05,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:05,875 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:09:05,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:09:05,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:05,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 21:09:05,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:06,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:06,043 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:09:06,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270030969] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:06,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:09:06,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2023-11-23 21:09:06,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119071956] [2023-11-23 21:09:06,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:06,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:09:06,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:06,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:09:06,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:09:06,046 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 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) [2023-11-23 21:09:06,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:06,131 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2023-11-23 21:09:06,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:09:06,131 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 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 [2023-11-23 21:09:06,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:06,132 INFO L225 Difference]: With dead ends: 35 [2023-11-23 21:09:06,132 INFO L226 Difference]: Without dead ends: 35 [2023-11-23 21:09:06,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-23 21:09:06,134 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 13 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:06,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 18 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:09:06,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-23 21:09:06,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2023-11-23 21:09:06,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 25 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) [2023-11-23 21:09:06,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-11-23 21:09:06,139 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 7 [2023-11-23 21:09:06,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:06,139 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-11-23 21:09:06,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 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) [2023-11-23 21:09:06,140 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-11-23 21:09:06,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-23 21:09:06,140 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:06,140 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:06,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:09:06,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-23 21:09:06,357 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:09:06,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:06,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1885308454, now seen corresponding path program 1 times [2023-11-23 21:09:06,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:06,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866787490] [2023-11-23 21:09:06,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:06,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:06,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:06,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:06,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:06,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866787490] [2023-11-23 21:09:06,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866787490] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:06,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:06,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:09:06,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825991075] [2023-11-23 21:09:06,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:06,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:09:06,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:06,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:09:06,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:09:06,531 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2023-11-23 21:09:06,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:06,567 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2023-11-23 21:09:06,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:09:06,567 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 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 [2023-11-23 21:09:06,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:06,569 INFO L225 Difference]: With dead ends: 24 [2023-11-23 21:09:06,570 INFO L226 Difference]: Without dead ends: 24 [2023-11-23 21:09:06,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:09:06,573 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:06,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 7 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:09:06,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-23 21:09:06,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-23 21:09:06,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 23 states have internal predecessors, (28), 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) [2023-11-23 21:09:06,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-11-23 21:09:06,586 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 7 [2023-11-23 21:09:06,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:06,587 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-11-23 21:09:06,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2023-11-23 21:09:06,588 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-11-23 21:09:06,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-23 21:09:06,588 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:06,590 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:06,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:09:06,591 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:09:06,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:06,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1885308453, now seen corresponding path program 1 times [2023-11-23 21:09:06,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:06,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001828235] [2023-11-23 21:09:06,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:06,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:06,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:06,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:09:06,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:06,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001828235] [2023-11-23 21:09:06,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001828235] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:06,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:06,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:09:06,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762448096] [2023-11-23 21:09:06,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:06,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:09:06,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:06,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:09:06,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:09:06,786 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2023-11-23 21:09:06,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:06,847 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2023-11-23 21:09:06,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:09:06,848 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 [2023-11-23 21:09:06,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:06,852 INFO L225 Difference]: With dead ends: 25 [2023-11-23 21:09:06,852 INFO L226 Difference]: Without dead ends: 25 [2023-11-23 21:09:06,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:09:06,854 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 5 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:06,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 17 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:09:06,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-23 21:09:06,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-23 21:09:06,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.45) internal successors, (29), 24 states have internal predecessors, (29), 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) [2023-11-23 21:09:06,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-11-23 21:09:06,867 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 7 [2023-11-23 21:09:06,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:06,868 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-11-23 21:09:06,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2023-11-23 21:09:06,869 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-11-23 21:09:06,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 21:09:06,870 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:06,870 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:06,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 21:09:06,870 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:09:06,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:06,871 INFO L85 PathProgramCache]: Analyzing trace with hash 64570770, now seen corresponding path program 1 times [2023-11-23 21:09:06,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:06,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596971343] [2023-11-23 21:09:06,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:06,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:06,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:07,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:09:07,040 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:07,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596971343] [2023-11-23 21:09:07,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596971343] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:09:07,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860985958] [2023-11-23 21:09:07,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:07,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:07,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:07,045 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:09:07,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:09:07,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:07,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 21:09:07,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:07,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:09:07,210 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:09:07,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2023-11-23 21:09:07,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:09:07,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860985958] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:09:07,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [746117597] [2023-11-23 21:09:07,373 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-23 21:09:07,374 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:09:07,378 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:09:07,383 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:09:07,384 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:09:08,451 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:09:08,818 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '565#(and (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~1#1| 0) (<= (select |#length| |ULTIMATE.start_main_~#b~0#1.base|) 3) (exists ((|v_ULTIMATE.start_main_~i~1#1_47| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 32 (mod |v_ULTIMATE.start_main_~i~1#1_47| 4294967296)) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (<= 2 |ULTIMATE.start_main_~#mask~0#1.base|) (<= 0 |v_ULTIMATE.start_main_~i~1#1_47|))))' at error location [2023-11-23 21:09:08,818 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:09:08,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:09:08,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-11-23 21:09:08,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196981276] [2023-11-23 21:09:08,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:09:08,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 21:09:08,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:08,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 21:09:08,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-11-23 21:09:08,821 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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) [2023-11-23 21:09:08,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:08,912 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2023-11-23 21:09:08,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:09:08,913 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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 10 [2023-11-23 21:09:08,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:08,914 INFO L225 Difference]: With dead ends: 27 [2023-11-23 21:09:08,914 INFO L226 Difference]: Without dead ends: 27 [2023-11-23 21:09:08,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-11-23 21:09:08,915 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 52 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:08,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 17 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:09:08,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-23 21:09:08,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2023-11-23 21:09:08,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 25 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) [2023-11-23 21:09:08,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-11-23 21:09:08,919 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 10 [2023-11-23 21:09:08,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:08,920 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-11-23 21:09:08,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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) [2023-11-23 21:09:08,920 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-11-23 21:09:08,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 21:09:08,920 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:08,921 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:08,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:09:09,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:09,141 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:09:09,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:09,142 INFO L85 PathProgramCache]: Analyzing trace with hash 64499700, now seen corresponding path program 1 times [2023-11-23 21:09:09,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:09,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775821107] [2023-11-23 21:09:09,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:09,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:09,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:09,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:09:09,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:09,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775821107] [2023-11-23 21:09:09,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775821107] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:09:09,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405227586] [2023-11-23 21:09:09,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:09,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:09,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:09,249 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:09:09,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:09:09,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:09,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 21:09:09,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:09,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:09:09,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:09:09,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:09:09,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405227586] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:09:09,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [624000846] [2023-11-23 21:09:09,387 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-23 21:09:09,388 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:09:09,388 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:09:09,388 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:09:09,388 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:09:10,090 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:09:10,405 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '692#(and (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_main_#t~ret3#1| |ULTIMATE.start_foo_#res#1|) (<= (select |#length| |ULTIMATE.start_main_~#b~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) 3)) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (<= 2 |ULTIMATE.start_main_~#mask~0#1.base|) (<= 1 |ULTIMATE.start_foo_#res#1|) (<= |ULTIMATE.start_main_#t~ret3#1| 2147483647))' at error location [2023-11-23 21:09:10,405 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:09:10,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:09:10,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-23 21:09:10,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048059323] [2023-11-23 21:09:10,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:09:10,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 21:09:10,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:10,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 21:09:10,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-11-23 21:09:10,407 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 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) [2023-11-23 21:09:10,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:10,530 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2023-11-23 21:09:10,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:09:10,530 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 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 10 [2023-11-23 21:09:10,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:10,531 INFO L225 Difference]: With dead ends: 30 [2023-11-23 21:09:10,531 INFO L226 Difference]: Without dead ends: 30 [2023-11-23 21:09:10,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2023-11-23 21:09:10,532 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 33 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:10,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 9 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:09:10,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-23 21:09:10,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2023-11-23 21:09:10,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 26 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) [2023-11-23 21:09:10,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2023-11-23 21:09:10,535 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 10 [2023-11-23 21:09:10,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:10,536 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2023-11-23 21:09:10,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 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) [2023-11-23 21:09:10,536 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2023-11-23 21:09:10,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-23 21:09:10,536 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:10,537 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:10,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:09:10,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-23 21:09:10,737 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:09:10,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:10,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1922968173, now seen corresponding path program 1 times [2023-11-23 21:09:10,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:10,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405935264] [2023-11-23 21:09:10,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:10,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:10,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:10,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:09:10,805 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:10,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405935264] [2023-11-23 21:09:10,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405935264] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:09:10,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373382643] [2023-11-23 21:09:10,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:10,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:10,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:10,807 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:09:10,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:09:10,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:10,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-23 21:09:10,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:11,037 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#mask~0#1.base_21| Int) (|v_ULTIMATE.start_main_~#b~0#1.base_30| Int) (v_DerPreprocessor_2 Int) (v_DerPreprocessor_1 Int)) (let ((.cse0 (select (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_30| v_DerPreprocessor_1) |v_ULTIMATE.start_main_~#mask~0#1.base_21| v_DerPreprocessor_2) |v_ULTIMATE.start_main_~#b~0#1.base_30|))) (and (= (select (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_30| .cse0) |v_ULTIMATE.start_main_~#mask~0#1.base_21|) 0) (<= 1 .cse0) (= (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_30| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_21| 0) |c_#valid|) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_30|) 0)))) is different from true [2023-11-23 21:09:11,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:09:11,038 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:09:11,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373382643] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:11,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:09:11,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-11-23 21:09:11,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905797344] [2023-11-23 21:09:11,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:11,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:09:11,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:11,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:09:11,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=13, Unknown=1, NotChecked=6, Total=30 [2023-11-23 21:09:11,040 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2023-11-23 21:09:11,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:11,082 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2023-11-23 21:09:11,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:09:11,083 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 [2023-11-23 21:09:11,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:11,083 INFO L225 Difference]: With dead ends: 28 [2023-11-23 21:09:11,084 INFO L226 Difference]: Without dead ends: 27 [2023-11-23 21:09:11,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=13, Unknown=1, NotChecked=6, Total=30 [2023-11-23 21:09:11,085 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:11,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 6 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 17 Unchecked, 0.0s Time] [2023-11-23 21:09:11,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-23 21:09:11,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-11-23 21:09:11,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 26 states have internal predecessors, (29), 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) [2023-11-23 21:09:11,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2023-11-23 21:09:11,088 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 12 [2023-11-23 21:09:11,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:11,088 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2023-11-23 21:09:11,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2023-11-23 21:09:11,088 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2023-11-23 21:09:11,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-23 21:09:11,089 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:11,089 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:11,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 21:09:11,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-23 21:09:11,307 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:09:11,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:11,307 INFO L85 PathProgramCache]: Analyzing trace with hash -517524466, now seen corresponding path program 1 times [2023-11-23 21:09:11,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:11,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134752140] [2023-11-23 21:09:11,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:11,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:11,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:11,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:09:11,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:11,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134752140] [2023-11-23 21:09:11,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134752140] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:09:11,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841491257] [2023-11-23 21:09:11,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:11,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:11,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:11,409 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:09:11,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 21:09:11,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:11,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 21:09:11,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:11,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 21:09:11,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-23 21:09:11,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:11,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:09:11,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-11-23 21:09:11,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-11-23 21:09:11,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:11,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841491257] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:09:11,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [362809260] [2023-11-23 21:09:11,761 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-23 21:09:11,761 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:09:11,761 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:09:11,762 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:09:11,762 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:09:12,722 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:09:13,124 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '942#(and (<= 0 |ULTIMATE.start_main_~i~1#1|) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (exists ((|v_#valid_45| (Array Int Int)) (|v_ULTIMATE.start_main_~#mask~0#1.base_22| Int) (|v_ULTIMATE.start_main_~#b~0#1.base_31| Int)) (= (store (store |v_#valid_45| |v_ULTIMATE.start_main_~#b~0#1.base_31| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_22| 0) |#valid|)) (<= 32 (mod |ULTIMATE.start_main_~i~1#1| 4294967296)) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2023-11-23 21:09:13,125 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:09:13,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:09:13,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 8, 8] total 16 [2023-11-23 21:09:13,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155647130] [2023-11-23 21:09:13,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:09:13,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-23 21:09:13,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:13,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-23 21:09:13,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2023-11-23 21:09:13,127 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 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) [2023-11-23 21:09:13,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:13,277 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2023-11-23 21:09:13,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 21:09:13,278 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 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 13 [2023-11-23 21:09:13,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:13,279 INFO L225 Difference]: With dead ends: 44 [2023-11-23 21:09:13,279 INFO L226 Difference]: Without dead ends: 44 [2023-11-23 21:09:13,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2023-11-23 21:09:13,280 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 21 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:13,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 42 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:09:13,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-23 21:09:13,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2023-11-23 21:09:13,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.28) internal successors, (32), 29 states have internal predecessors, (32), 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) [2023-11-23 21:09:13,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2023-11-23 21:09:13,284 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 13 [2023-11-23 21:09:13,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:13,284 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2023-11-23 21:09:13,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 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) [2023-11-23 21:09:13,284 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2023-11-23 21:09:13,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-23 21:09:13,285 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:13,285 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1] [2023-11-23 21:09:13,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 21:09:13,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:13,486 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:09:13,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:13,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1599782154, now seen corresponding path program 1 times [2023-11-23 21:09:13,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:13,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216221651] [2023-11-23 21:09:13,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:13,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:13,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:13,553 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:09:13,553 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:13,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216221651] [2023-11-23 21:09:13,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216221651] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:09:13,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447843237] [2023-11-23 21:09:13,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:13,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:13,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:13,556 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:09:13,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 21:09:13,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:13,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 21:09:13,622 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:13,653 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:09:13,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:09:13,684 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:09:13,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447843237] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:09:13,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [447651446] [2023-11-23 21:09:13,688 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-23 21:09:13,689 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:09:13,689 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:09:13,689 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:09:13,689 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:09:14,351 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:09:14,698 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1109#(and (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 2 |ULTIMATE.start_foo_~b#1.base|) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (<= 2 |ULTIMATE.start_main_~#mask~0#1.base|) (= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 32 (mod |ULTIMATE.start_foo_~i~0#1| 4294967296)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~size#1|) (<= 2 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~i~0#1|))' at error location [2023-11-23 21:09:14,699 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:09:14,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:09:14,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 3] total 8 [2023-11-23 21:09:14,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960965766] [2023-11-23 21:09:14,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:09:14,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 21:09:14,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:14,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 21:09:14,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-11-23 21:09:14,701 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 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) [2023-11-23 21:09:14,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:14,900 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2023-11-23 21:09:14,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 21:09:14,900 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 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) Word has length 13 [2023-11-23 21:09:14,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:14,901 INFO L225 Difference]: With dead ends: 62 [2023-11-23 21:09:14,901 INFO L226 Difference]: Without dead ends: 62 [2023-11-23 21:09:14,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2023-11-23 21:09:14,902 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 50 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:14,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 9 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:09:14,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-23 21:09:14,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 37. [2023-11-23 21:09:14,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.34375) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:14,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2023-11-23 21:09:14,906 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 13 [2023-11-23 21:09:14,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:14,906 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2023-11-23 21:09:14,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 9 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) [2023-11-23 21:09:14,906 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2023-11-23 21:09:14,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-23 21:09:14,907 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:14,907 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2023-11-23 21:09:14,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 21:09:15,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:15,119 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:09:15,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:15,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1946360724, now seen corresponding path program 1 times [2023-11-23 21:09:15,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:15,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246928553] [2023-11-23 21:09:15,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:15,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:15,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:15,308 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:09:15,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:15,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246928553] [2023-11-23 21:09:15,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246928553] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:09:15,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134063801] [2023-11-23 21:09:15,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:15,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:15,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:15,310 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:09:15,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 21:09:15,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:15,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-23 21:09:15,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:15,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-23 21:09:15,472 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:09:15,472 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:09:15,563 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:09:15,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134063801] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:09:15,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [313834987] [2023-11-23 21:09:15,566 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-23 21:09:15,566 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:09:15,566 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:09:15,567 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:09:15,567 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:09:16,045 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:09:16,335 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1321#(and (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 2 |ULTIMATE.start_foo_~b#1.base|) (<= (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 31) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (<= 2 |ULTIMATE.start_main_~#mask~0#1.base|) (= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~size#1|) (<= (select |#length| |ULTIMATE.start_foo_~b#1.base|) |ULTIMATE.start_foo_~i~0#1|) (<= 2 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~i~0#1|))' at error location [2023-11-23 21:09:16,336 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:09:16,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:09:16,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2023-11-23 21:09:16,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050553047] [2023-11-23 21:09:16,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:09:16,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 21:09:16,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:16,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 21:09:16,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-11-23 21:09:16,338 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 11 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:16,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:16,476 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2023-11-23 21:09:16,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:09:16,477 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-23 21:09:16,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:16,477 INFO L225 Difference]: With dead ends: 38 [2023-11-23 21:09:16,477 INFO L226 Difference]: Without dead ends: 38 [2023-11-23 21:09:16,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2023-11-23 21:09:16,479 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:16,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 11 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:09:16,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-23 21:09:16,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-11-23 21:09:16,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:16,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2023-11-23 21:09:16,482 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 14 [2023-11-23 21:09:16,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:16,483 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2023-11-23 21:09:16,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:16,483 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2023-11-23 21:09:16,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-23 21:09:16,484 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:16,484 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1] [2023-11-23 21:09:16,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 21:09:16,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:16,699 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:09:16,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:16,699 INFO L85 PathProgramCache]: Analyzing trace with hash -2141825580, now seen corresponding path program 2 times [2023-11-23 21:09:16,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:16,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289133654] [2023-11-23 21:09:16,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:16,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:16,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:16,847 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 21:09:16,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:16,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289133654] [2023-11-23 21:09:16,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289133654] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:09:16,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699211622] [2023-11-23 21:09:16,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:09:16,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:16,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:16,850 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:09:16,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 21:09:16,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-23 21:09:16,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:09:16,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-23 21:09:16,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:16,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-23 21:09:16,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-23 21:09:17,085 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 21:09:17,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:09:17,178 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 21:09:17,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699211622] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:09:17,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [388955331] [2023-11-23 21:09:17,180 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-23 21:09:17,181 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:09:17,181 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:09:17,181 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:09:17,182 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:09:17,996 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:09:18,553 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1511#(and (<= (select |#length| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4) 3)) (= |ULTIMATE.start_main_#t~ret3#1| |ULTIMATE.start_foo_#res#1|) (exists ((|v_ULTIMATE.start_foo_~b#1.offset_51| Int) (|v_ULTIMATE.start_foo_~size#1_45| Int) (|v_ULTIMATE.start_foo_#in~b#1.offset_46| Int) (|v_ULTIMATE.start_foo_#in~b#1.base_46| Int) (|v_ULTIMATE.start_foo_~b#1.base_52| Int) (|v_ULTIMATE.start_foo_#in~size#1_46| Int)) (and (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= (+ |v_ULTIMATE.start_foo_~size#1_45| 1) |ULTIMATE.start_foo_#res#1|) (= |v_ULTIMATE.start_foo_~b#1.offset_51| 0) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (<= 2 |ULTIMATE.start_main_~#mask~0#1.base|) (= |v_ULTIMATE.start_foo_#in~b#1.offset_46| 0) (<= 0 |v_ULTIMATE.start_foo_#in~size#1_46|) (<= 0 |v_ULTIMATE.start_foo_~size#1_45|) (<= 2 |v_ULTIMATE.start_foo_#in~b#1.base_46|) (<= 2 |v_ULTIMATE.start_foo_~b#1.base_52|))) (<= |ULTIMATE.start_main_#t~ret3#1| 2147483647))' at error location [2023-11-23 21:09:18,553 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:09:18,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:09:18,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 8 [2023-11-23 21:09:18,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414105162] [2023-11-23 21:09:18,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:09:18,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 21:09:18,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:18,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 21:09:18,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-11-23 21:09:18,555 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 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) [2023-11-23 21:09:18,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:18,646 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2023-11-23 21:09:18,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:09:18,647 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 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 16 [2023-11-23 21:09:18,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:18,648 INFO L225 Difference]: With dead ends: 94 [2023-11-23 21:09:18,648 INFO L226 Difference]: Without dead ends: 94 [2023-11-23 21:09:18,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2023-11-23 21:09:18,649 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:18,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 29 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:09:18,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-23 21:09:18,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2023-11-23 21:09:18,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.3132530120481927) internal successors, (109), 87 states have internal predecessors, (109), 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) [2023-11-23 21:09:18,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2023-11-23 21:09:18,656 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 16 [2023-11-23 21:09:18,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:18,657 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2023-11-23 21:09:18,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 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) [2023-11-23 21:09:18,657 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2023-11-23 21:09:18,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-23 21:09:18,658 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:18,658 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1] [2023-11-23 21:09:18,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 21:09:18,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-23 21:09:18,859 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:09:18,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:18,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1235711035, now seen corresponding path program 2 times [2023-11-23 21:09:18,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:18,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333336450] [2023-11-23 21:09:18,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:18,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:18,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:18,996 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:09:18,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:18,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333336450] [2023-11-23 21:09:18,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333336450] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:09:18,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001656799] [2023-11-23 21:09:18,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:09:18,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:18,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:18,999 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:09:19,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 21:09:19,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-23 21:09:19,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:09:19,069 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 21:09:19,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:19,218 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-23 21:09:19,219 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:09:19,660 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-23 21:09:19,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001656799] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:09:19,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [83573573] [2023-11-23 21:09:19,663 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-23 21:09:19,663 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:09:19,663 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:09:19,663 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:09:19,664 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:09:20,482 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:09:21,073 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1846#(and (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 2 |ULTIMATE.start_foo_~b#1.base|) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (<= 2 |ULTIMATE.start_main_~#mask~0#1.base|) (= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 32 (mod |ULTIMATE.start_foo_~i~0#1| 4294967296)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~size#1|) (<= 1 |ULTIMATE.start_foo_~i~0#1|) (<= 2 |ULTIMATE.start_foo_#in~b#1.base|))' at error location [2023-11-23 21:09:21,073 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:09:21,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:09:21,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 18 [2023-11-23 21:09:21,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388244630] [2023-11-23 21:09:21,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:09:21,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-23 21:09:21,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:21,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-23 21:09:21,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2023-11-23 21:09:21,076 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:21,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:21,470 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2023-11-23 21:09:21,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-23 21:09:21,471 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-23 21:09:21,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:21,472 INFO L225 Difference]: With dead ends: 85 [2023-11-23 21:09:21,472 INFO L226 Difference]: Without dead ends: 85 [2023-11-23 21:09:21,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=214, Invalid=976, Unknown=0, NotChecked=0, Total=1190 [2023-11-23 21:09:21,473 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 49 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:21,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 16 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:09:21,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-23 21:09:21,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2023-11-23 21:09:21,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 79 states have internal predecessors, (94), 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) [2023-11-23 21:09:21,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 94 transitions. [2023-11-23 21:09:21,479 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 94 transitions. Word has length 22 [2023-11-23 21:09:21,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:21,479 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 94 transitions. [2023-11-23 21:09:21,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:21,480 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 94 transitions. [2023-11-23 21:09:21,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-23 21:09:21,481 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:21,481 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-23 21:09:21,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 21:09:21,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-23 21:09:21,702 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:09:21,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:21,702 INFO L85 PathProgramCache]: Analyzing trace with hash 515665271, now seen corresponding path program 1 times [2023-11-23 21:09:21,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:21,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459470304] [2023-11-23 21:09:21,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:21,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:21,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:21,799 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 21:09:21,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:21,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459470304] [2023-11-23 21:09:21,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459470304] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:09:21,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103150419] [2023-11-23 21:09:21,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:21,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:21,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:21,801 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:09:21,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 21:09:21,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:21,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 21:09:21,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:22,020 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 21:09:22,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:09:22,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-11-23 21:09:22,192 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 21:09:22,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103150419] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:09:22,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1962379323] [2023-11-23 21:09:22,195 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-23 21:09:22,196 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:09:22,196 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:09:22,196 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:09:22,197 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:09:23,111 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:09:23,265 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2178#(and (<= (mod |ULTIMATE.start_main_~i~1#1| 4294967296) 31) (<= 0 |ULTIMATE.start_main_~i~1#1|) (or (< (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)) 0) (< (select |#length| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4) 4))))' at error location [2023-11-23 21:09:23,265 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:09:23,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:09:23,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2023-11-23 21:09:23,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709788130] [2023-11-23 21:09:23,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:09:23,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-23 21:09:23,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:23,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-23 21:09:23,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2023-11-23 21:09:23,269 INFO L87 Difference]: Start difference. First operand 80 states and 94 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:23,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:23,435 INFO L93 Difference]: Finished difference Result 87 states and 99 transitions. [2023-11-23 21:09:23,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:09:23,436 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-23 21:09:23,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:23,438 INFO L225 Difference]: With dead ends: 87 [2023-11-23 21:09:23,438 INFO L226 Difference]: Without dead ends: 87 [2023-11-23 21:09:23,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2023-11-23 21:09:23,439 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 94 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:23,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 34 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:09:23,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-11-23 21:09:23,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2023-11-23 21:09:23,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.2307692307692308) internal successors, (96), 82 states have internal predecessors, (96), 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) [2023-11-23 21:09:23,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2023-11-23 21:09:23,447 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 22 [2023-11-23 21:09:23,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:23,447 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2023-11-23 21:09:23,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:23,447 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2023-11-23 21:09:23,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-23 21:09:23,448 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:23,448 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 3, 2, 2, 1, 1] [2023-11-23 21:09:23,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-23 21:09:23,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-23 21:09:23,649 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:09:23,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:23,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1047415030, now seen corresponding path program 2 times [2023-11-23 21:09:23,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:23,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940430293] [2023-11-23 21:09:23,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:23,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:23,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:23,857 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 26 proven. 73 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 21:09:23,858 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:23,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940430293] [2023-11-23 21:09:23,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940430293] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:09:23,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952101572] [2023-11-23 21:09:23,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:09:23,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:23,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:23,860 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:09:23,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 21:09:23,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-23 21:09:23,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:09:23,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-23 21:09:23,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:23,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 21:09:23,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:09:23,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-23 21:09:24,136 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 12 proven. 55 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-23 21:09:24,137 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:09:24,386 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-23 21:09:24,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952101572] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:09:24,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [280147670] [2023-11-23 21:09:24,388 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-23 21:09:24,388 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:09:24,389 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:09:24,389 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:09:24,389 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:09:24,980 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:09:25,330 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2568#(and (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 2 |ULTIMATE.start_foo_~b#1.base|) (<= (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 31) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (<= 2 |ULTIMATE.start_main_~#mask~0#1.base|) (= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~size#1|) (<= (select |#length| |ULTIMATE.start_foo_~b#1.base|) |ULTIMATE.start_foo_~i~0#1|) (<= 2 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~i~0#1|))' at error location [2023-11-23 21:09:25,330 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:09:25,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:09:25,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 17 [2023-11-23 21:09:25,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057466946] [2023-11-23 21:09:25,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:09:25,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-23 21:09:25,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:25,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-23 21:09:25,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2023-11-23 21:09:25,332 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:25,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:25,852 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2023-11-23 21:09:25,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-23 21:09:25,853 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-11-23 21:09:25,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:25,853 INFO L225 Difference]: With dead ends: 80 [2023-11-23 21:09:25,853 INFO L226 Difference]: Without dead ends: 80 [2023-11-23 21:09:25,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=304, Invalid=1256, Unknown=0, NotChecked=0, Total=1560 [2023-11-23 21:09:25,855 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 60 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:25,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 13 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:09:25,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-11-23 21:09:25,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 68. [2023-11-23 21:09:25,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 64 states have (on average 1.171875) internal successors, (75), 67 states have internal predecessors, (75), 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) [2023-11-23 21:09:25,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2023-11-23 21:09:25,860 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 32 [2023-11-23 21:09:25,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:25,860 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2023-11-23 21:09:25,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:25,861 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2023-11-23 21:09:25,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-23 21:09:25,862 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:25,862 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1] [2023-11-23 21:09:25,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-23 21:09:26,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-23 21:09:26,079 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:09:26,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:26,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1554714126, now seen corresponding path program 2 times [2023-11-23 21:09:26,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:26,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716060143] [2023-11-23 21:09:26,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:26,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:26,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:26,274 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 13 proven. 38 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-23 21:09:26,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:26,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716060143] [2023-11-23 21:09:26,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716060143] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:09:26,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478537386] [2023-11-23 21:09:26,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:09:26,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:26,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:26,287 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:09:26,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-23 21:09:26,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-23 21:09:26,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:09:26,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-23 21:09:26,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:26,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:09:26,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-23 21:09:26,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-23 21:09:26,650 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-23 21:09:26,651 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:09:26,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478537386] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:26,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:09:26,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 11 [2023-11-23 21:09:26,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830228838] [2023-11-23 21:09:26,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:26,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:09:26,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:26,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:09:26,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-23 21:09:26,653 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 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) [2023-11-23 21:09:26,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:26,688 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2023-11-23 21:09:26,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:09:26,689 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 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) Word has length 34 [2023-11-23 21:09:26,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:26,690 INFO L225 Difference]: With dead ends: 66 [2023-11-23 21:09:26,690 INFO L226 Difference]: Without dead ends: 66 [2023-11-23 21:09:26,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-23 21:09:26,691 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 20 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:26,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 10 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:09:26,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-23 21:09:26,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2023-11-23 21:09:26,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 64 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:26,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2023-11-23 21:09:26,695 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 34 [2023-11-23 21:09:26,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:26,695 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2023-11-23 21:09:26,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 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) [2023-11-23 21:09:26,699 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2023-11-23 21:09:26,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-23 21:09:26,701 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:26,701 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2023-11-23 21:09:26,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-23 21:09:26,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:26,903 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:09:26,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:26,903 INFO L85 PathProgramCache]: Analyzing trace with hash 438807470, now seen corresponding path program 2 times [2023-11-23 21:09:26,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:26,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635745602] [2023-11-23 21:09:26,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:26,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:26,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:27,093 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 13 proven. 38 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-23 21:09:27,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:27,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635745602] [2023-11-23 21:09:27,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635745602] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:09:27,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146072645] [2023-11-23 21:09:27,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:09:27,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:27,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:27,095 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:09:27,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-23 21:09:27,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-23 21:09:27,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:09:27,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 21:09:27,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:27,989 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-11-23 21:09:27,989 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:09:27,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146072645] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:27,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:09:27,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 9 [2023-11-23 21:09:27,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143138780] [2023-11-23 21:09:27,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:27,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:09:27,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:27,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:09:27,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-23 21:09:27,992 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2023-11-23 21:09:28,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:28,084 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2023-11-23 21:09:28,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:09:28,085 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 37 [2023-11-23 21:09:28,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:28,087 INFO L225 Difference]: With dead ends: 64 [2023-11-23 21:09:28,087 INFO L226 Difference]: Without dead ends: 53 [2023-11-23 21:09:28,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-23 21:09:28,088 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:28,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 8 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 2 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:09:28,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-23 21:09:28,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-11-23 21:09:28,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:28,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2023-11-23 21:09:28,092 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 37 [2023-11-23 21:09:28,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:28,093 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2023-11-23 21:09:28,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2023-11-23 21:09:28,093 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2023-11-23 21:09:28,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-23 21:09:28,095 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:28,095 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 5, 4, 4, 1, 1] [2023-11-23 21:09:28,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-23 21:09:28,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:28,318 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:09:28,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:28,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1977165516, now seen corresponding path program 3 times [2023-11-23 21:09:28,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:28,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407310780] [2023-11-23 21:09:28,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:28,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:28,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:28,668 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 190 proven. 21 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-23 21:09:28,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:28,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407310780] [2023-11-23 21:09:28,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407310780] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:09:28,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614341575] [2023-11-23 21:09:28,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 21:09:28,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:28,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:28,671 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:09:28,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-23 21:09:28,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 21:09:28,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:09:28,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 21:09:28,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:28,919 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 153 proven. 32 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-11-23 21:09:28,920 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:09:29,023 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 153 proven. 32 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-11-23 21:09:29,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614341575] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:09:29,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [803625193] [2023-11-23 21:09:29,025 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-23 21:09:29,026 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:09:29,026 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:09:29,026 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:09:29,026 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:09:29,660 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:09:30,128 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3536#(and (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 2 |ULTIMATE.start_foo_~b#1.base|) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (<= 2 |ULTIMATE.start_main_~#mask~0#1.base|) (= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 32 (mod |ULTIMATE.start_foo_~i~0#1| 4294967296)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~size#1|) (<= 2 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~i~0#1|))' at error location [2023-11-23 21:09:30,128 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:09:30,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:09:30,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 17 [2023-11-23 21:09:30,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029446493] [2023-11-23 21:09:30,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:09:30,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-23 21:09:30,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:30,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-23 21:09:30,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2023-11-23 21:09:30,131 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:30,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:30,354 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2023-11-23 21:09:30,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 21:09:30,355 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-11-23 21:09:30,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:30,355 INFO L225 Difference]: With dead ends: 58 [2023-11-23 21:09:30,355 INFO L226 Difference]: Without dead ends: 58 [2023-11-23 21:09:30,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 132 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2023-11-23 21:09:30,357 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:30,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 0 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:09:30,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-23 21:09:30,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2023-11-23 21:09:30,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 55 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:30,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2023-11-23 21:09:30,360 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 49 [2023-11-23 21:09:30,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:30,361 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2023-11-23 21:09:30,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:30,361 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2023-11-23 21:09:30,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-23 21:09:30,362 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:30,363 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 1, 1] [2023-11-23 21:09:30,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-23 21:09:30,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-23 21:09:30,575 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:09:30,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:30,575 INFO L85 PathProgramCache]: Analyzing trace with hash -372200272, now seen corresponding path program 4 times [2023-11-23 21:09:30,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:30,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973884725] [2023-11-23 21:09:30,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:30,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:30,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:30,865 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 198 proven. 96 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-23 21:09:30,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:30,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973884725] [2023-11-23 21:09:30,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973884725] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:09:30,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522707687] [2023-11-23 21:09:30,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-23 21:09:30,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:30,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:30,883 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:09:30,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-23 21:09:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:31,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 21:09:31,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:31,117 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 210 proven. 84 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-23 21:09:31,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:09:31,264 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 210 proven. 84 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-23 21:09:31,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522707687] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:09:31,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [139410308] [2023-11-23 21:09:31,266 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-23 21:09:31,266 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:09:31,267 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:09:31,267 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:09:31,267 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:09:31,709 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:09:32,003 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4018#(and (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 2 |ULTIMATE.start_foo_~b#1.base|) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (<= 2 |ULTIMATE.start_main_~#mask~0#1.base|) (= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 32 (mod |ULTIMATE.start_foo_~i~0#1| 4294967296)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~size#1|) (<= 2 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~i~0#1|))' at error location [2023-11-23 21:09:32,003 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:09:32,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:09:32,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-23 21:09:32,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863698542] [2023-11-23 21:09:32,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:09:32,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-23 21:09:32,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:32,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-23 21:09:32,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2023-11-23 21:09:32,005 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 18 states have internal predecessors, (65), 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) [2023-11-23 21:09:32,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:32,298 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2023-11-23 21:09:32,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-23 21:09:32,302 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-11-23 21:09:32,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:32,302 INFO L225 Difference]: With dead ends: 62 [2023-11-23 21:09:32,302 INFO L226 Difference]: Without dead ends: 62 [2023-11-23 21:09:32,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 145 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=244, Invalid=946, Unknown=0, NotChecked=0, Total=1190 [2023-11-23 21:09:32,304 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 24 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:32,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 0 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:09:32,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-23 21:09:32,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2023-11-23 21:09:32,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 states have internal predecessors, (61), 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) [2023-11-23 21:09:32,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2023-11-23 21:09:32,307 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 55 [2023-11-23 21:09:32,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:32,307 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2023-11-23 21:09:32,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 18 states have internal predecessors, (65), 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) [2023-11-23 21:09:32,308 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2023-11-23 21:09:32,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-23 21:09:32,309 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:32,309 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 5, 4, 4, 1, 1] [2023-11-23 21:09:32,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-23 21:09:32,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:32,527 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-23 21:09:32,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:32,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1130091075, now seen corresponding path program 5 times [2023-11-23 21:09:32,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:32,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480624241] [2023-11-23 21:09:32,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:32,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:32,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:32,713 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 160 proven. 26 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2023-11-23 21:09:32,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:32,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480624241] [2023-11-23 21:09:32,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480624241] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:09:32,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614847001] [2023-11-23 21:09:32,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:09:32,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:32,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:32,715 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:09:32,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-23 21:09:32,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-23 21:09:32,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:09:32,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-23 21:09:32,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:32,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-23 21:09:32,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-23 21:09:33,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-23 21:09:33,326 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2023-11-23 21:09:33,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:09:33,725 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2023-11-23 21:09:33,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614847001] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:09:33,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1341045221] [2023-11-23 21:09:33,728 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-23 21:09:33,728 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:09:33,729 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:09:33,729 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:09:33,729 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:09:34,612 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:09:35,217 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4524#(and (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 2 |ULTIMATE.start_foo_~b#1.base|) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (<= 2 |ULTIMATE.start_main_~#mask~0#1.base|) (= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 32 (mod |ULTIMATE.start_foo_~i~0#1| 4294967296)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~size#1|) (<= 2 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~i~0#1|))' at error location [2023-11-23 21:09:35,218 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:09:35,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:09:35,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2023-11-23 21:09:35,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517108456] [2023-11-23 21:09:35,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:09:35,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-23 21:09:35,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:35,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-23 21:09:35,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2023-11-23 21:09:35,223 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 17 states, 16 states have (on average 3.25) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:35,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:35,523 INFO L93 Difference]: Finished difference Result 69 states and 75 transitions. [2023-11-23 21:09:35,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 21:09:35,523 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.25) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2023-11-23 21:09:35,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:35,524 INFO L225 Difference]: With dead ends: 69 [2023-11-23 21:09:35,524 INFO L226 Difference]: Without dead ends: 0 [2023-11-23 21:09:35,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2023-11-23 21:09:35,525 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 68 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:35,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 0 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:09:35,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-23 21:09:35,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-23 21:09:35,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2023-11-23 21:09:35,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-23 21:09:35,526 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 58 [2023-11-23 21:09:35,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:35,526 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-23 21:09:35,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.25) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:35,527 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-23 21:09:35,527 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-23 21:09:35,529 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX (7 of 8 remaining) [2023-11-23 21:09:35,530 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 8 remaining) [2023-11-23 21:09:35,530 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2023-11-23 21:09:35,530 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2023-11-23 21:09:35,531 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 8 remaining) [2023-11-23 21:09:35,531 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 8 remaining) [2023-11-23 21:09:35,531 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 8 remaining) [2023-11-23 21:09:35,531 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2023-11-23 21:09:35,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-23 21:09:35,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-23 21:09:35,754 INFO L445 BasicCegarLoop]: Path program histogram: [5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:35,756 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-23 21:09:35,758 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 09:09:35 BoogieIcfgContainer [2023-11-23 21:09:35,758 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-23 21:09:35,759 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-23 21:09:35,759 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-23 21:09:35,759 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-23 21:09:35,760 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:09:04" (3/4) ... [2023-11-23 21:09:35,762 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-23 21:09:35,770 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2023-11-23 21:09:35,770 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2023-11-23 21:09:35,770 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-11-23 21:09:35,771 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-23 21:09:35,868 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/witness.graphml [2023-11-23 21:09:35,868 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/witness.yml [2023-11-23 21:09:35,868 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-23 21:09:35,869 INFO L158 Benchmark]: Toolchain (without parser) took 32657.66ms. Allocated memory was 138.4MB in the beginning and 388.0MB in the end (delta: 249.6MB). Free memory was 98.0MB in the beginning and 265.4MB in the end (delta: -167.4MB). Peak memory consumption was 84.2MB. Max. memory is 16.1GB. [2023-11-23 21:09:35,869 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 104.9MB. Free memory is still 53.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 21:09:35,870 INFO L158 Benchmark]: CACSL2BoogieTranslator took 259.84ms. Allocated memory is still 138.4MB. Free memory was 98.0MB in the beginning and 87.8MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-23 21:09:35,870 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.58ms. Allocated memory is still 138.4MB. Free memory was 87.8MB in the beginning and 86.5MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 21:09:35,870 INFO L158 Benchmark]: Boogie Preprocessor took 26.42ms. Allocated memory is still 138.4MB. Free memory was 86.5MB in the beginning and 85.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 21:09:35,871 INFO L158 Benchmark]: RCFGBuilder took 534.33ms. Allocated memory is still 138.4MB. Free memory was 85.0MB in the beginning and 110.1MB in the end (delta: -25.1MB). Peak memory consumption was 19.5MB. Max. memory is 16.1GB. [2023-11-23 21:09:35,871 INFO L158 Benchmark]: TraceAbstraction took 31683.52ms. Allocated memory was 138.4MB in the beginning and 388.0MB in the end (delta: 249.6MB). Free memory was 109.3MB in the beginning and 270.3MB in the end (delta: -161.0MB). Peak memory consumption was 89.9MB. Max. memory is 16.1GB. [2023-11-23 21:09:35,872 INFO L158 Benchmark]: Witness Printer took 109.58ms. Allocated memory is still 388.0MB. Free memory was 270.3MB in the beginning and 265.4MB in the end (delta: 4.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-23 21:09:35,873 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 104.9MB. Free memory is still 53.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 259.84ms. Allocated memory is still 138.4MB. Free memory was 98.0MB in the beginning and 87.8MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.58ms. Allocated memory is still 138.4MB. Free memory was 87.8MB in the beginning and 86.5MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 26.42ms. Allocated memory is still 138.4MB. Free memory was 86.5MB in the beginning and 85.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 534.33ms. Allocated memory is still 138.4MB. Free memory was 85.0MB in the beginning and 110.1MB in the end (delta: -25.1MB). Peak memory consumption was 19.5MB. Max. memory is 16.1GB. * TraceAbstraction took 31683.52ms. Allocated memory was 138.4MB in the beginning and 388.0MB in the end (delta: 249.6MB). Free memory was 109.3MB in the beginning and 270.3MB in the end (delta: -161.0MB). Peak memory consumption was 89.9MB. Max. memory is 16.1GB. * Witness Printer took 109.58ms. Allocated memory is still 388.0MB. Free memory was 270.3MB in the beginning and 265.4MB in the end (delta: 4.9MB). Peak memory consumption was 4.2MB. 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 - PositiveResult [Line: 18]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 23]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 8 error locations. Started 1 CEGAR loops. OverallTime: 31.6s, OverallIterations: 23, TraceHistogramMax: 15, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 3.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 666 SdHoareTripleChecker+Valid, 1.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 666 mSDsluCounter, 317 SdHoareTripleChecker+Invalid, 1.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 17 IncrementalHoareTripleChecker+Unchecked, 209 mSDsCounter, 107 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1871 IncrementalHoareTripleChecker+Invalid, 1997 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 107 mSolverCounterUnsat, 108 mSDtfsCounter, 1871 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1190 GetRequests, 837 SyntacticMatches, 8 SemanticMatches, 345 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2161 ImplicationChecksByTransitivity, 8.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=88occurred in iteration=15, InterpolantAutomatonStates: 177, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 23 MinimizatonAttempts, 122 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 8.4s InterpolantComputationTime, 844 NumberOfCodeBlocks, 700 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 1107 ConstructedInterpolants, 37 QuantifiedInterpolants, 9773 SizeOfPredicates, 59 NumberOfNonLiveVariables, 1867 ConjunctsInSsa, 210 ConjunctsInUnsatCore, 51 InterpolantComputations, 11 PerfectInterpolantSequences, 2693/3888 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 - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-23 21:09:35,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aba10351-494f-4453-afe9-61e025730089/bin/utaipan-verify-mE87zJ7Ire/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 Result: TRUE