./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cf1a7837 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_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX --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 eb589a592aff310a2662d7a22b89559cebd75929901bc5e2cc7816fe45d47c92 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:50:46,106 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:50:46,185 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-12 00:50:46,190 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:50:46,191 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:50:46,219 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:50:46,220 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:50:46,221 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:50:46,222 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:50:46,222 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:50:46,223 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:50:46,223 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:50:46,224 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:50:46,225 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:50:46,225 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:50:46,226 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:50:46,226 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:50:46,227 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:50:46,228 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:50:46,228 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:50:46,229 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:50:46,234 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:50:46,235 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 00:50:46,236 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 00:50:46,236 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:50:46,237 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:50:46,237 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:50:46,238 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:50:46,238 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:50:46,239 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 00:50:46,239 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 00:50:46,240 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 00:50:46,240 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:50:46,241 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 00:50:46,241 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 00:50:46,266 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:50:46,266 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:50:46,267 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:50:46,267 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:50:46,268 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:50:46,268 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:50:46,270 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:50:46,270 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:50:46,270 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:50:46,270 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:50:46,271 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:50:46,271 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_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb589a592aff310a2662d7a22b89559cebd75929901bc5e2cc7816fe45d47c92 [2023-11-12 00:50:46,678 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:50:46,728 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:50:46,732 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:50:46,734 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:50:46,736 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:50:46,737 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c [2023-11-12 00:50:50,249 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:50:50,460 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:50:50,461 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c [2023-11-12 00:50:50,468 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/data/7ff09eb9e/c49362f8ba094a2fac5401cbdda6d27e/FLAG7c890f829 [2023-11-12 00:50:50,484 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/data/7ff09eb9e/c49362f8ba094a2fac5401cbdda6d27e [2023-11-12 00:50:50,512 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:50:50,517 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:50:50,519 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:50:50,522 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:50:50,539 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:50:50,539 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:50:50" (1/1) ... [2023-11-12 00:50:50,541 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bcb5dc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:50, skipping insertion in model container [2023-11-12 00:50:50,541 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:50:50" (1/1) ... [2023-11-12 00:50:50,576 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:50:50,765 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:50:50,775 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:50:50,788 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:50:50,800 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:50:50,801 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:50 WrapperNode [2023-11-12 00:50:50,801 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:50:50,802 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:50:50,803 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:50:50,803 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:50:50,810 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:50" (1/1) ... [2023-11-12 00:50:50,816 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:50" (1/1) ... [2023-11-12 00:50:50,835 INFO L138 Inliner]: procedures = 8, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 60 [2023-11-12 00:50:50,836 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:50:50,837 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:50:50,837 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:50:50,837 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:50:50,846 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:50" (1/1) ... [2023-11-12 00:50:50,847 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:50" (1/1) ... [2023-11-12 00:50:50,849 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:50" (1/1) ... [2023-11-12 00:50:50,849 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:50" (1/1) ... [2023-11-12 00:50:50,854 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:50" (1/1) ... [2023-11-12 00:50:50,858 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:50" (1/1) ... [2023-11-12 00:50:50,860 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:50" (1/1) ... [2023-11-12 00:50:50,861 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:50" (1/1) ... [2023-11-12 00:50:50,863 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:50:50,864 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:50:50,864 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:50:50,864 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:50:50,865 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:50" (1/1) ... [2023-11-12 00:50:50,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:50:50,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:50:50,906 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:50:50,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:50:50,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:50:50,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:50:50,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:50:50,948 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:50:50,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:50:50,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:50:51,019 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:50:51,021 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:50:51,240 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:50:51,296 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:50:51,296 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-12 00:50:51,298 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:50:51 BoogieIcfgContainer [2023-11-12 00:50:51,299 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:50:51,302 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:50:51,302 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:50:51,306 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:50:51,306 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:50:50" (1/3) ... [2023-11-12 00:50:51,307 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e6f236f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:50:51, skipping insertion in model container [2023-11-12 00:50:51,307 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:50" (2/3) ... [2023-11-12 00:50:51,308 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e6f236f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:50:51, skipping insertion in model container [2023-11-12 00:50:51,308 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:50:51" (3/3) ... [2023-11-12 00:50:51,309 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength.c [2023-11-12 00:50:51,332 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:50:51,332 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-11-12 00:50:51,380 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:50:51,387 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;@46ff747a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:50:51,387 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-12 00:50:51,391 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) [2023-11-12 00:50:51,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-12 00:50:51,397 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:50:51,398 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-12 00:50:51,399 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)] === [2023-11-12 00:50:51,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:50:51,405 INFO L85 PathProgramCache]: Analyzing trace with hash 3240188, now seen corresponding path program 1 times [2023-11-12 00:50:51,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:50:51,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601289448] [2023-11-12 00:50:51,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:51,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:50:51,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:51,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:50:51,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:50:51,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601289448] [2023-11-12 00:50:51,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601289448] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:50:51,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:50:51,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:50:51,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564813701] [2023-11-12 00:50:51,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:50:51,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:50:51,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:50:51,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:50:51,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:50:51,767 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) [2023-11-12 00:50:51,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:50:51,869 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2023-11-12 00:50:51,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:50:51,873 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 [2023-11-12 00:50:51,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:50:51,883 INFO L225 Difference]: With dead ends: 36 [2023-11-12 00:50:51,883 INFO L226 Difference]: Without dead ends: 35 [2023-11-12 00:50:51,885 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 [2023-11-12 00:50:51,890 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 [2023-11-12 00:50:51,892 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] [2023-11-12 00:50:51,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-12 00:50:51,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2023-11-12 00:50:51,930 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) [2023-11-12 00:50:51,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2023-11-12 00:50:51,933 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2023-11-12 00:50:51,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:50:51,934 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2023-11-12 00:50:51,934 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) [2023-11-12 00:50:51,934 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2023-11-12 00:50:51,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-12 00:50:51,935 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:50:51,935 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-12 00:50:51,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:50:51,936 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)] === [2023-11-12 00:50:51,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:50:51,938 INFO L85 PathProgramCache]: Analyzing trace with hash 3168033, now seen corresponding path program 1 times [2023-11-12 00:50:51,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:50:51,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253872673] [2023-11-12 00:50:51,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:51,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:50:51,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:52,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:50:52,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:50:52,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253872673] [2023-11-12 00:50:52,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253872673] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:50:52,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:50:52,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:50:52,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21737040] [2023-11-12 00:50:52,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:50:52,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:50:52,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:50:52,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:50:52,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:50:52,127 INFO L87 Difference]: Start difference. First operand 20 states and 23 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) [2023-11-12 00:50:52,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:50:52,212 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2023-11-12 00:50:52,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:50:52,213 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 [2023-11-12 00:50:52,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:50:52,215 INFO L225 Difference]: With dead ends: 30 [2023-11-12 00:50:52,215 INFO L226 Difference]: Without dead ends: 30 [2023-11-12 00:50:52,215 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 [2023-11-12 00:50:52,217 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 10 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:50:52,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 20 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:50:52,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-12 00:50:52,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 21. [2023-11-12 00:50:52,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 20 states have internal predecessors, (24), 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) [2023-11-12 00:50:52,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2023-11-12 00:50:52,224 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 4 [2023-11-12 00:50:52,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:50:52,224 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2023-11-12 00:50:52,225 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) [2023-11-12 00:50:52,225 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2023-11-12 00:50:52,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-12 00:50:52,226 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:50:52,226 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-12 00:50:52,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:50:52,227 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)] === [2023-11-12 00:50:52,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:50:52,228 INFO L85 PathProgramCache]: Analyzing trace with hash 3170125, now seen corresponding path program 1 times [2023-11-12 00:50:52,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:50:52,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792357311] [2023-11-12 00:50:52,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:52,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:50:52,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:52,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:50:52,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:50:52,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792357311] [2023-11-12 00:50:52,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792357311] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:50:52,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:50:52,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 00:50:52,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009052371] [2023-11-12 00:50:52,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:50:52,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:50:52,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:50:52,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:50:52,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:50:52,366 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 3 states, 2 states have (on average 2.0) 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) [2023-11-12 00:50:52,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:50:52,420 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2023-11-12 00:50:52,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:50:52,420 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) 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 [2023-11-12 00:50:52,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:50:52,423 INFO L225 Difference]: With dead ends: 19 [2023-11-12 00:50:52,424 INFO L226 Difference]: Without dead ends: 19 [2023-11-12 00:50:52,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:50:52,435 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 13 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:50:52,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 6 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:50:52,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-12 00:50:52,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-12 00:50:52,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.6923076923076923) 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) [2023-11-12 00:50:52,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2023-11-12 00:50:52,441 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 4 [2023-11-12 00:50:52,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:50:52,442 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2023-11-12 00:50:52,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) 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) [2023-11-12 00:50:52,442 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2023-11-12 00:50:52,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-12 00:50:52,443 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:50:52,443 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-12 00:50:52,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:50:52,444 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-12 00:50:52,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:50:52,452 INFO L85 PathProgramCache]: Analyzing trace with hash 3170126, now seen corresponding path program 1 times [2023-11-12 00:50:52,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:50:52,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077493450] [2023-11-12 00:50:52,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:52,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:50:52,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:52,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:50:52,622 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:50:52,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077493450] [2023-11-12 00:50:52,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077493450] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:50:52,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:50:52,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 00:50:52,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35690085] [2023-11-12 00:50:52,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:50:52,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:50:52,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:50:52,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:50:52,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:50:52,625 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 3 states, 2 states have (on average 2.0) 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) [2023-11-12 00:50:52,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:50:52,667 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2023-11-12 00:50:52,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:50:52,668 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) 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 [2023-11-12 00:50:52,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:50:52,669 INFO L225 Difference]: With dead ends: 20 [2023-11-12 00:50:52,669 INFO L226 Difference]: Without dead ends: 20 [2023-11-12 00:50:52,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:50:52,672 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:50:52,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:50:52,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-12 00:50:52,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-12 00:50:52,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.6428571428571428) 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) [2023-11-12 00:50:52,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2023-11-12 00:50:52,677 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2023-11-12 00:50:52,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:50:52,678 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2023-11-12 00:50:52,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) 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) [2023-11-12 00:50:52,678 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2023-11-12 00:50:52,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-12 00:50:52,679 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:50:52,679 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:50:52,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:50:52,680 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-12 00:50:52,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:50:52,681 INFO L85 PathProgramCache]: Analyzing trace with hash -46754049, now seen corresponding path program 1 times [2023-11-12 00:50:52,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:50:52,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154808973] [2023-11-12 00:50:52,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:52,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:50:52,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:52,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:50:52,746 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:50:52,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154808973] [2023-11-12 00:50:52,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154808973] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:50:52,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6720368] [2023-11-12 00:50:52,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:52,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:50:52,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:50:52,752 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:50:52,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:50:52,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:52,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:50:52,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:50:52,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:50:52,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:50:52,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:50:52,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6720368] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:50:52,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1473820987] [2023-11-12 00:50:52,969 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-12 00:50:52,969 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:50:52,976 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:50:52,983 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:50:52,983 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:50:53,524 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:50:53,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1473820987] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:50:53,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:50:53,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 8 [2023-11-12 00:50:53,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396011023] [2023-11-12 00:50:53,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:50:53,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:50:53,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:50:53,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:50:53,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:50:53,885 INFO L87 Difference]: Start difference. First operand 20 states and 23 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) [2023-11-12 00:50:54,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:50:54,328 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2023-11-12 00:50:54,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:50:54,329 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 [2023-11-12 00:50:54,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:50:54,330 INFO L225 Difference]: With dead ends: 26 [2023-11-12 00:50:54,330 INFO L226 Difference]: Without dead ends: 26 [2023-11-12 00:50:54,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2023-11-12 00:50:54,331 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:50:54,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 8 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:50:54,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-12 00:50:54,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2023-11-12 00:50:54,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 23 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) [2023-11-12 00:50:54,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2023-11-12 00:50:54,340 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 7 [2023-11-12 00:50:54,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:50:54,340 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2023-11-12 00:50:54,341 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) [2023-11-12 00:50:54,341 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2023-11-12 00:50:54,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-12 00:50:54,342 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:50:54,342 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-12 00:50:54,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:50:54,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:50:54,548 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)] === [2023-11-12 00:50:54,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:50:54,549 INFO L85 PathProgramCache]: Analyzing trace with hash -46825228, now seen corresponding path program 1 times [2023-11-12 00:50:54,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:50:54,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141405908] [2023-11-12 00:50:54,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:54,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:50:54,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:54,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:50:54,752 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:50:54,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141405908] [2023-11-12 00:50:54,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141405908] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:50:54,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304307092] [2023-11-12 00:50:54,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:54,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:50:54,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:50:54,754 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:50:54,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:50:54,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:54,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-12 00:50:54,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:50:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:50:54,849 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:50:54,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:50:54,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304307092] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:50:54,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1285784691] [2023-11-12 00:50:54,907 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-11-12 00:50:54,907 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:50:54,908 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:50:54,908 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:50:54,908 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:50:55,139 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:50:55,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1285784691] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:50:55,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:50:55,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 11 [2023-11-12 00:50:55,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617592534] [2023-11-12 00:50:55,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:50:55,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:50:55,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:50:55,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:50:55,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-12 00:50:55,631 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:50:55,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:50:55,785 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2023-11-12 00:50:55,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:50:55,786 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-12 00:50:55,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:50:55,786 INFO L225 Difference]: With dead ends: 24 [2023-11-12 00:50:55,786 INFO L226 Difference]: Without dead ends: 24 [2023-11-12 00:50:55,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-12 00:50:55,788 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:50:55,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 10 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:50:55,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-12 00:50:55,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-12 00:50:55,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.5555555555555556) 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) [2023-11-12 00:50:55,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-11-12 00:50:55,793 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 7 [2023-11-12 00:50:55,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:50:55,793 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-11-12 00:50:55,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:50:55,794 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-11-12 00:50:55,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-12 00:50:55,794 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:50:55,795 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-11-12 00:50:55,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:50:56,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 00:50:56,001 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-12 00:50:56,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:50:56,001 INFO L85 PathProgramCache]: Analyzing trace with hash 894109178, now seen corresponding path program 1 times [2023-11-12 00:50:56,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:50:56,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560048706] [2023-11-12 00:50:56,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:56,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:50:56,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:56,138 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:50:56,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:50:56,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560048706] [2023-11-12 00:50:56,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560048706] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:50:56,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212737417] [2023-11-12 00:50:56,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:56,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:50:56,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:50:56,140 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:50:56,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:50:56,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:56,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 00:50:56,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:50:56,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:50:56,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:50:56,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:50:56,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212737417] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:50:56,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [674058366] [2023-11-12 00:50:56,315 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-12 00:50:56,315 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:50:56,316 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:50:56,316 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:50:56,317 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:50:57,087 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:50:57,280 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '479#(and (<= (+ |ULTIMATE.start_foo_~i~0#1| 1) |ULTIMATE.start_foo_~size#1|) (<= (mod |ULTIMATE.start_foo_~n#1| 4294967296) (mod |ULTIMATE.start_foo_~i~0#1| 4294967296)) (<= 0 |ULTIMATE.start_foo_~i~0#1|))' at error location [2023-11-12 00:50:57,281 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:50:57,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:50:57,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-12 00:50:57,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739956580] [2023-11-12 00:50:57,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:50:57,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 00:50:57,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:50:57,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 00:50:57,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-11-12 00:50:57,283 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 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) [2023-11-12 00:50:57,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:50:57,421 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2023-11-12 00:50:57,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:50:57,421 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 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 [2023-11-12 00:50:57,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:50:57,422 INFO L225 Difference]: With dead ends: 44 [2023-11-12 00:50:57,422 INFO L226 Difference]: Without dead ends: 44 [2023-11-12 00:50:57,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2023-11-12 00:50:57,424 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 17 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:50:57,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 18 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:50:57,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-12 00:50:57,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 33. [2023-11-12 00:50:57,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 32 states have internal predecessors, (40), 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) [2023-11-12 00:50:57,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2023-11-12 00:50:57,429 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 10 [2023-11-12 00:50:57,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:50:57,429 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2023-11-12 00:50:57,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 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) [2023-11-12 00:50:57,430 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2023-11-12 00:50:57,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-12 00:50:57,430 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:50:57,430 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-11-12 00:50:57,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:50:57,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 00:50:57,638 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)] === [2023-11-12 00:50:57,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:50:57,639 INFO L85 PathProgramCache]: Analyzing trace with hash 894111271, now seen corresponding path program 1 times [2023-11-12 00:50:57,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:50:57,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226447] [2023-11-12 00:50:57,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:57,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:50:57,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:57,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:50:57,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:50:57,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226447] [2023-11-12 00:50:57,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226447] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:50:57,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:50:57,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:50:57,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339528770] [2023-11-12 00:50:57,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:50:57,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:50:57,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:50:57,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:50:57,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:50:57,817 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:50:57,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:50:57,874 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2023-11-12 00:50:57,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:50:57,875 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-12 00:50:57,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:50:57,879 INFO L225 Difference]: With dead ends: 32 [2023-11-12 00:50:57,879 INFO L226 Difference]: Without dead ends: 32 [2023-11-12 00:50:57,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:50:57,881 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:50:57,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 6 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:50:57,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-12 00:50:57,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-11-12 00:50:57,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 31 states have internal predecessors, (38), 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) [2023-11-12 00:50:57,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2023-11-12 00:50:57,899 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 10 [2023-11-12 00:50:57,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:50:57,899 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2023-11-12 00:50:57,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:50:57,900 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2023-11-12 00:50:57,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-12 00:50:57,901 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:50:57,901 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:50:57,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 00:50:57,901 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)] === [2023-11-12 00:50:57,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:50:57,902 INFO L85 PathProgramCache]: Analyzing trace with hash -916992634, now seen corresponding path program 1 times [2023-11-12 00:50:57,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:50:57,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366617859] [2023-11-12 00:50:57,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:57,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:50:57,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:58,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:50:58,011 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:50:58,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366617859] [2023-11-12 00:50:58,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366617859] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:50:58,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855548391] [2023-11-12 00:50:58,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:58,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:50:58,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:50:58,013 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:50:58,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:50:58,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:58,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 00:50:58,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:50:58,123 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:50:58,123 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:50:58,169 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:50:58,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855548391] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:50:58,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1562769343] [2023-11-12 00:50:58,172 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-12 00:50:58,172 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:50:58,173 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:50:58,173 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:50:58,173 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:50:58,787 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:50:59,033 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '720#(and (<= |ULTIMATE.start_foo_#res#1| 2147483647) (<= 0 |ULTIMATE.start_foo_#res#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (or (< |ULTIMATE.start_main_~#b~0#1.offset| 0) (< (select |#length| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| 4))) (= (select |#valid| |ULTIMATE.start_main_~#b~0#1.base|) 1) (exists ((|v_ULTIMATE.start_main_~i~1#1_73| Int) (|v_#memory_int_39| (Array Int (Array Int Int)))) (and (= |#memory_int| (store |v_#memory_int_39| |ULTIMATE.start_main_~#b~0#1.base| (store (select |v_#memory_int_39| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (- 4) (* |v_ULTIMATE.start_main_~i~1#1_73| 4)) |ULTIMATE.start_foo_#res#1|))) (<= 100 |v_ULTIMATE.start_main_~i~1#1_73|) (<= (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |v_ULTIMATE.start_main_~i~1#1_73| 4)) (select |#length| |ULTIMATE.start_main_~#b~0#1.base|)) (<= 4 (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |v_ULTIMATE.start_main_~i~1#1_73| 4))))))' at error location [2023-11-12 00:50:59,033 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:50:59,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:50:59,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 10 [2023-11-12 00:50:59,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144514700] [2023-11-12 00:50:59,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:50:59,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 00:50:59,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:50:59,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 00:50:59,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-11-12 00:50:59,036 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 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) [2023-11-12 00:50:59,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:50:59,266 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2023-11-12 00:50:59,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-12 00:50:59,267 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 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 [2023-11-12 00:50:59,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:50:59,269 INFO L225 Difference]: With dead ends: 98 [2023-11-12 00:50:59,269 INFO L226 Difference]: Without dead ends: 98 [2023-11-12 00:50:59,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=420, Unknown=0, NotChecked=0, Total=552 [2023-11-12 00:50:59,270 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 145 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:50:59,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 33 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:50:59,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-11-12 00:50:59,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2023-11-12 00:50:59,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 71 states have (on average 1.408450704225352) internal successors, (100), 74 states have internal predecessors, (100), 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) [2023-11-12 00:50:59,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 100 transitions. [2023-11-12 00:50:59,279 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 100 transitions. Word has length 13 [2023-11-12 00:50:59,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:50:59,279 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 100 transitions. [2023-11-12 00:50:59,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 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) [2023-11-12 00:50:59,280 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 100 transitions. [2023-11-12 00:50:59,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-12 00:50:59,281 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:50:59,281 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1] [2023-11-12 00:50:59,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:50:59,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:50:59,487 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-12 00:50:59,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:50:59,488 INFO L85 PathProgramCache]: Analyzing trace with hash -917063813, now seen corresponding path program 2 times [2023-11-12 00:50:59,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:50:59,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085659162] [2023-11-12 00:50:59,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:59,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:50:59,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:59,653 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:50:59,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:50:59,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085659162] [2023-11-12 00:50:59,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085659162] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:50:59,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66310899] [2023-11-12 00:50:59,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:50:59,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:50:59,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:50:59,657 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:50:59,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:50:59,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-12 00:50:59,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:50:59,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 00:50:59,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:50:59,772 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 00:50:59,772 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:50:59,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66310899] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:50:59,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:50:59,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 7 [2023-11-12 00:50:59,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717902053] [2023-11-12 00:50:59,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:50:59,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:50:59,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:50:59,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:50:59,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:50:59,776 INFO L87 Difference]: Start difference. First operand 75 states and 100 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:50:59,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:50:59,820 INFO L93 Difference]: Finished difference Result 74 states and 96 transitions. [2023-11-12 00:50:59,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:50:59,821 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-12 00:50:59,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:50:59,822 INFO L225 Difference]: With dead ends: 74 [2023-11-12 00:50:59,822 INFO L226 Difference]: Without dead ends: 74 [2023-11-12 00:50:59,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:50:59,824 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:50:59,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 11 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:50:59,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-12 00:50:59,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2023-11-12 00:50:59,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 71 states have (on average 1.352112676056338) internal successors, (96), 73 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) [2023-11-12 00:50:59,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 96 transitions. [2023-11-12 00:50:59,837 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 96 transitions. Word has length 13 [2023-11-12 00:50:59,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:50:59,838 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 96 transitions. [2023-11-12 00:50:59,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:50:59,838 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 96 transitions. [2023-11-12 00:50:59,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-12 00:50:59,840 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:50:59,840 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1] [2023-11-12 00:50:59,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 00:51:00,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:51:00,045 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-12 00:51:00,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:00,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1635792922, now seen corresponding path program 1 times [2023-11-12 00:51:00,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:00,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30053227] [2023-11-12 00:51:00,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:00,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:00,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:00,122 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:51:00,123 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:00,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30053227] [2023-11-12 00:51:00,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30053227] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:51:00,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273816231] [2023-11-12 00:51:00,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:00,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:51:00,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:51:00,125 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:51:00,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 00:51:00,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:00,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-12 00:51:00,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:51:00,238 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:51:00,238 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:51:00,280 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-12 00:51:00,281 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2023-11-12 00:51:00,306 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:51:00,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273816231] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:51:00,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [256917526] [2023-11-12 00:51:00,309 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-12 00:51:00,309 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:51:00,310 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:51:00,310 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:51:00,310 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:51:00,855 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:51:01,025 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1190#(and (not (= (select |#valid| |ULTIMATE.start_foo_~b#1.base|) 1)) (<= (+ |ULTIMATE.start_foo_~i~0#1| 1) |ULTIMATE.start_foo_~size#1|) (<= (+ (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 1) (mod |ULTIMATE.start_foo_~n#1| 4294967296)) (<= 0 |ULTIMATE.start_foo_~i~0#1|))' at error location [2023-11-12 00:51:01,025 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:51:01,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:51:01,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-11-12 00:51:01,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757780029] [2023-11-12 00:51:01,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:51:01,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:51:01,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:51:01,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:51:01,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-12 00:51:01,027 INFO L87 Difference]: Start difference. First operand 74 states and 96 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:01,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:51:01,070 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2023-11-12 00:51:01,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:51:01,071 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-12 00:51:01,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:51:01,072 INFO L225 Difference]: With dead ends: 73 [2023-11-12 00:51:01,072 INFO L226 Difference]: Without dead ends: 73 [2023-11-12 00:51:01,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-11-12 00:51:01,073 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:51:01,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 7 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:51:01,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-12 00:51:01,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2023-11-12 00:51:01,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 71 states have (on average 1.295774647887324) internal successors, (92), 72 states have internal predecessors, (92), 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) [2023-11-12 00:51:01,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 92 transitions. [2023-11-12 00:51:01,079 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 92 transitions. Word has length 14 [2023-11-12 00:51:01,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:51:01,079 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 92 transitions. [2023-11-12 00:51:01,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:01,080 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 92 transitions. [2023-11-12 00:51:01,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-12 00:51:01,081 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:01,081 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1] [2023-11-12 00:51:01,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 00:51:01,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-12 00:51:01,287 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-12 00:51:01,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:01,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1635792923, now seen corresponding path program 1 times [2023-11-12 00:51:01,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:01,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287212511] [2023-11-12 00:51:01,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:01,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:01,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:01,420 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 00:51:01,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:01,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287212511] [2023-11-12 00:51:01,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287212511] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:51:01,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571571428] [2023-11-12 00:51:01,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:01,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:51:01,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:51:01,423 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:51:01,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 00:51:01,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:01,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-12 00:51:01,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:51:01,511 INFO L351 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 8 treesize of output 1 [2023-11-12 00:51:01,586 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 00:51:01,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:51:01,681 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 00:51:01,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571571428] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:51:01,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1670287282] [2023-11-12 00:51:01,684 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-12 00:51:01,684 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:51:01,684 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:51:01,685 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:51:01,685 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:51:02,236 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:51:02,414 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1431#(and (or (< (select |#length| |ULTIMATE.start_foo_~b#1.base|) (+ 4 (* |ULTIMATE.start_foo_~i~0#1| 4) |ULTIMATE.start_foo_~b#1.offset|)) (< (+ (* |ULTIMATE.start_foo_~i~0#1| 4) |ULTIMATE.start_foo_~b#1.offset|) 0)) (<= (+ |ULTIMATE.start_foo_~i~0#1| 1) |ULTIMATE.start_foo_~size#1|) (<= (+ (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 1) (mod |ULTIMATE.start_foo_~n#1| 4294967296)) (<= 0 |ULTIMATE.start_foo_~i~0#1|))' at error location [2023-11-12 00:51:02,414 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:51:02,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:51:02,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-11-12 00:51:02,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92528919] [2023-11-12 00:51:02,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:51:02,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:51:02,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:51:02,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:51:02,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-11-12 00:51:02,416 INFO L87 Difference]: Start difference. First operand 73 states and 92 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 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) [2023-11-12 00:51:02,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:51:02,503 INFO L93 Difference]: Finished difference Result 97 states and 124 transitions. [2023-11-12 00:51:02,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:51:02,503 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 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 [2023-11-12 00:51:02,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:51:02,504 INFO L225 Difference]: With dead ends: 97 [2023-11-12 00:51:02,504 INFO L226 Difference]: Without dead ends: 97 [2023-11-12 00:51:02,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2023-11-12 00:51:02,505 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:51:02,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 9 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:51:02,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-12 00:51:02,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 89. [2023-11-12 00:51:02,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 87 states have (on average 1.3333333333333333) internal successors, (116), 88 states have internal predecessors, (116), 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) [2023-11-12 00:51:02,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 116 transitions. [2023-11-12 00:51:02,510 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 116 transitions. Word has length 14 [2023-11-12 00:51:02,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:51:02,510 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 116 transitions. [2023-11-12 00:51:02,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 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) [2023-11-12 00:51:02,510 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 116 transitions. [2023-11-12 00:51:02,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-12 00:51:02,511 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:02,511 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1] [2023-11-12 00:51:02,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 00:51:02,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-12 00:51:02,729 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-12 00:51:02,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:02,729 INFO L85 PathProgramCache]: Analyzing trace with hash -2145744491, now seen corresponding path program 2 times [2023-11-12 00:51:02,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:02,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985926888] [2023-11-12 00:51:02,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:02,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:02,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:02,809 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 00:51:02,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:02,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985926888] [2023-11-12 00:51:02,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985926888] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:51:02,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:51:02,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:51:02,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862119781] [2023-11-12 00:51:02,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:51:02,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:51:02,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:51:02,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:51:02,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:51:02,811 INFO L87 Difference]: Start difference. First operand 89 states and 116 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 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) [2023-11-12 00:51:02,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:51:02,857 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2023-11-12 00:51:02,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:51:02,858 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 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 17 [2023-11-12 00:51:02,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:51:02,859 INFO L225 Difference]: With dead ends: 79 [2023-11-12 00:51:02,859 INFO L226 Difference]: Without dead ends: 79 [2023-11-12 00:51:02,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:51:02,860 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:51:02,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 6 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:51:02,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-12 00:51:02,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2023-11-12 00:51:02,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 75 states have (on average 1.2666666666666666) internal successors, (95), 76 states have internal predecessors, (95), 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) [2023-11-12 00:51:02,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 95 transitions. [2023-11-12 00:51:02,865 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 95 transitions. Word has length 17 [2023-11-12 00:51:02,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:51:02,865 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 95 transitions. [2023-11-12 00:51:02,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 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) [2023-11-12 00:51:02,865 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 95 transitions. [2023-11-12 00:51:02,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 00:51:02,866 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:02,866 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1] [2023-11-12 00:51:02,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-12 00:51:02,867 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)] === [2023-11-12 00:51:02,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:02,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1339424997, now seen corresponding path program 3 times [2023-11-12 00:51:02,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:02,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805937005] [2023-11-12 00:51:02,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:02,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:02,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:02,998 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:51:03,000 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:03,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805937005] [2023-11-12 00:51:03,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805937005] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:51:03,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673875877] [2023-11-12 00:51:03,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 00:51:03,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:51:03,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:51:03,002 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:51:03,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 00:51:03,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 00:51:03,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:51:03,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 00:51:03,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:51:03,159 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:51:03,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:51:03,225 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:51:03,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673875877] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:51:03,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1899552101] [2023-11-12 00:51:03,228 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-12 00:51:03,228 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:51:03,229 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:51:03,229 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:51:03,229 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:51:03,757 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:51:03,960 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1914#(and (or (< (select |#length| |ULTIMATE.start_foo_~b#1.base|) (+ 4 (* |ULTIMATE.start_foo_~i~0#1| 4) |ULTIMATE.start_foo_~b#1.offset|)) (< (+ (* |ULTIMATE.start_foo_~i~0#1| 4) |ULTIMATE.start_foo_~b#1.offset|) 0)) (<= (+ |ULTIMATE.start_foo_~i~0#1| 1) |ULTIMATE.start_foo_~size#1|) (<= (+ (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 1) (mod |ULTIMATE.start_foo_~n#1| 4294967296)) (<= 0 |ULTIMATE.start_foo_~i~0#1|))' at error location [2023-11-12 00:51:03,960 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:51:03,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:51:03,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-12 00:51:03,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722882801] [2023-11-12 00:51:03,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:51:03,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 00:51:03,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:51:03,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 00:51:03,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-11-12 00:51:03,962 INFO L87 Difference]: Start difference. First operand 77 states and 95 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 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) [2023-11-12 00:51:04,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:51:04,137 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2023-11-12 00:51:04,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 00:51:04,137 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 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) Word has length 20 [2023-11-12 00:51:04,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:51:04,138 INFO L225 Difference]: With dead ends: 81 [2023-11-12 00:51:04,138 INFO L226 Difference]: Without dead ends: 81 [2023-11-12 00:51:04,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2023-11-12 00:51:04,139 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 28 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:51:04,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 11 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:51:04,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-12 00:51:04,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 75. [2023-11-12 00:51:04,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 73 states have (on average 1.2465753424657535) internal successors, (91), 74 states have internal predecessors, (91), 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) [2023-11-12 00:51:04,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2023-11-12 00:51:04,143 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 20 [2023-11-12 00:51:04,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:51:04,143 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2023-11-12 00:51:04,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 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) [2023-11-12 00:51:04,143 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2023-11-12 00:51:04,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-12 00:51:04,144 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:04,144 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 1, 1] [2023-11-12 00:51:04,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 00:51:04,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-12 00:51:04,350 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-12 00:51:04,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:04,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1176886260, now seen corresponding path program 4 times [2023-11-12 00:51:04,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:04,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289577814] [2023-11-12 00:51:04,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:04,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:04,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:04,502 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 43 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 00:51:04,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:04,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289577814] [2023-11-12 00:51:04,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289577814] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:51:04,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116883706] [2023-11-12 00:51:04,503 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 00:51:04,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:51:04,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:51:04,509 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:51:04,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 00:51:04,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:04,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 00:51:04,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:51:04,650 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 00:51:04,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:51:04,700 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 00:51:04,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116883706] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:51:04,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [419682866] [2023-11-12 00:51:04,706 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-12 00:51:04,706 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:51:04,707 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:51:04,707 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:51:04,707 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:51:05,136 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:51:05,424 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2249#(and (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= (+ |ULTIMATE.start_foo_~i~0#1| 1) |ULTIMATE.start_foo_~size#1|) (<= (select |#length| |ULTIMATE.start_foo_~b#1.base|) (+ 3 (* |ULTIMATE.start_foo_~i~0#1| 4))) (= |ULTIMATE.start_foo_~b#1.offset| 0) (<= (+ (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 1) (mod |ULTIMATE.start_foo_~n#1| 4294967296)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_foo_~n#1|) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (<= 0 |ULTIMATE.start_foo_#in~n#1|))' at error location [2023-11-12 00:51:05,424 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:51:05,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:51:05,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-11-12 00:51:05,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058356905] [2023-11-12 00:51:05,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:51:05,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 00:51:05,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:51:05,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 00:51:05,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-11-12 00:51:05,426 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:05,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:51:05,558 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2023-11-12 00:51:05,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 00:51:05,559 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-12 00:51:05,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:51:05,560 INFO L225 Difference]: With dead ends: 79 [2023-11-12 00:51:05,560 INFO L226 Difference]: Without dead ends: 79 [2023-11-12 00:51:05,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2023-11-12 00:51:05,561 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 32 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:51:05,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 8 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:51:05,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-12 00:51:05,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2023-11-12 00:51:05,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 73 states have (on average 1.1917808219178083) internal successors, (87), 74 states have internal predecessors, (87), 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) [2023-11-12 00:51:05,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2023-11-12 00:51:05,564 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 26 [2023-11-12 00:51:05,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:51:05,564 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2023-11-12 00:51:05,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:05,564 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2023-11-12 00:51:05,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-12 00:51:05,565 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:05,565 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 3, 1, 1] [2023-11-12 00:51:05,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 00:51:05,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-12 00:51:05,771 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-12 00:51:05,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:05,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1336974428, now seen corresponding path program 5 times [2023-11-12 00:51:05,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:05,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451948313] [2023-11-12 00:51:05,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:05,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:05,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:06,054 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-12 00:51:06,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:06,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451948313] [2023-11-12 00:51:06,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451948313] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:51:06,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464529843] [2023-11-12 00:51:06,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:51:06,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:51:06,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:51:06,056 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:51:06,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 00:51:06,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 00:51:06,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:51:06,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-12 00:51:06,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:51:06,156 INFO L351 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 8 treesize of output 1 [2023-11-12 00:51:06,345 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-12 00:51:06,346 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:51:06,569 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-12 00:51:06,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464529843] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:51:06,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [504205339] [2023-11-12 00:51:06,571 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-12 00:51:06,571 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:51:06,572 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:51:06,572 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:51:06,572 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:51:06,986 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:51:07,318 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2597#(and (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= (+ |ULTIMATE.start_foo_~i~0#1| 1) |ULTIMATE.start_foo_~size#1|) (<= (select |#length| |ULTIMATE.start_foo_~b#1.base|) (+ 3 (* |ULTIMATE.start_foo_~i~0#1| 4))) (= |ULTIMATE.start_foo_~b#1.offset| 0) (<= (+ (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 1) (mod |ULTIMATE.start_foo_~n#1| 4294967296)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_foo_~n#1|) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (<= 0 |ULTIMATE.start_foo_#in~n#1|))' at error location [2023-11-12 00:51:07,318 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:51:07,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:51:07,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2023-11-12 00:51:07,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452929253] [2023-11-12 00:51:07,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:51:07,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 00:51:07,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:51:07,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 00:51:07,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2023-11-12 00:51:07,321 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:07,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:51:07,524 INFO L93 Difference]: Finished difference Result 86 states and 102 transitions. [2023-11-12 00:51:07,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:51:07,525 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-11-12 00:51:07,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:51:07,526 INFO L225 Difference]: With dead ends: 86 [2023-11-12 00:51:07,526 INFO L226 Difference]: Without dead ends: 86 [2023-11-12 00:51:07,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2023-11-12 00:51:07,527 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 15 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:51:07,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 14 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:51:07,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-12 00:51:07,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 68. [2023-11-12 00:51:07,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.164179104477612) internal successors, (78), 67 states have internal predecessors, (78), 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) [2023-11-12 00:51:07,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2023-11-12 00:51:07,531 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 29 [2023-11-12 00:51:07,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:51:07,531 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2023-11-12 00:51:07,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:07,532 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2023-11-12 00:51:07,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-12 00:51:07,533 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:07,534 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2023-11-12 00:51:07,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 00:51:07,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-12 00:51:07,739 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-12 00:51:07,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:07,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1326740319, now seen corresponding path program 1 times [2023-11-12 00:51:07,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:07,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018076093] [2023-11-12 00:51:07,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:07,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:07,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:08,135 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 155 proven. 21 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-12 00:51:08,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:08,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018076093] [2023-11-12 00:51:08,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018076093] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:51:08,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190442887] [2023-11-12 00:51:08,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:08,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:51:08,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:51:08,141 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:51:08,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 00:51:08,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:08,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 00:51:08,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:51:08,411 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 139 proven. 35 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-12 00:51:08,411 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:51:08,522 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 139 proven. 35 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-12 00:51:08,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190442887] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:51:08,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1782751671] [2023-11-12 00:51:08,524 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-12 00:51:08,524 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:51:08,525 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:51:08,525 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:51:08,525 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:51:09,055 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:51:09,505 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3085#(and (<= |ULTIMATE.start_foo_#res#1| 2147483647) (<= 0 |ULTIMATE.start_foo_#res#1|) (exists ((|v_ULTIMATE.start_main_~#b~0#1.offset_26| Int) (|v_ULTIMATE.start_main_~i~1#1_135| Int) (|v_#memory_int_92| (Array Int (Array Int Int))) (|v_#valid_49| (Array Int Int)) (|v_ULTIMATE.start_main_~#b~0#1.base_31| Int)) (and (<= 100 |v_ULTIMATE.start_main_~i~1#1_135|) (= (store |v_#valid_49| |v_ULTIMATE.start_main_~#b~0#1.base_31| 0) |#valid|) (<= 0 |v_ULTIMATE.start_main_~#b~0#1.offset_26|) (= (select |v_#valid_49| |v_ULTIMATE.start_main_~#b~0#1.base_31|) 1) (<= (+ |v_ULTIMATE.start_main_~#b~0#1.offset_26| (* 4 |v_ULTIMATE.start_main_~i~1#1_135|)) (select |#length| |v_ULTIMATE.start_main_~#b~0#1.base_31|)) (= |#memory_int| (store |v_#memory_int_92| |v_ULTIMATE.start_main_~#b~0#1.base_31| (store (select |v_#memory_int_92| |v_ULTIMATE.start_main_~#b~0#1.base_31|) (+ |v_ULTIMATE.start_main_~#b~0#1.offset_26| (* 4 |v_ULTIMATE.start_main_~i~1#1_135|) (- 4)) |ULTIMATE.start_foo_#res#1|))) (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_31|) |v_ULTIMATE.start_main_~#b~0#1.offset_26|) 0)))) (= |ULTIMATE.start_main_~i~1#1| 0) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (= |ULTIMATE.start_main_#res#1| 1))' at error location [2023-11-12 00:51:09,505 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:51:09,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:51:09,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 18 [2023-11-12 00:51:09,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547150124] [2023-11-12 00:51:09,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:51:09,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-12 00:51:09,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:51:09,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-12 00:51:09,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2023-11-12 00:51:09,508 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 18 states have internal predecessors, (66), 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) [2023-11-12 00:51:09,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:51:09,957 INFO L93 Difference]: Finished difference Result 89 states and 96 transitions. [2023-11-12 00:51:09,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-12 00:51:09,957 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 18 states have internal predecessors, (66), 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 51 [2023-11-12 00:51:09,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:51:09,958 INFO L225 Difference]: With dead ends: 89 [2023-11-12 00:51:09,958 INFO L226 Difference]: Without dead ends: 89 [2023-11-12 00:51:09,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 132 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=233, Invalid=1099, Unknown=0, NotChecked=0, Total=1332 [2023-11-12 00:51:09,960 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 39 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:51:09,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 35 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:51:09,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-12 00:51:09,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 77. [2023-11-12 00:51:09,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.144736842105263) internal successors, (87), 76 states have internal predecessors, (87), 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) [2023-11-12 00:51:09,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2023-11-12 00:51:09,964 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 51 [2023-11-12 00:51:09,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:51:09,964 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2023-11-12 00:51:09,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 18 states have internal predecessors, (66), 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) [2023-11-12 00:51:09,965 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2023-11-12 00:51:09,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-12 00:51:09,966 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:09,966 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2023-11-12 00:51:09,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 00:51:10,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-12 00:51:10,173 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-12 00:51:10,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:10,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1716769363, now seen corresponding path program 2 times [2023-11-12 00:51:10,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:10,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020424147] [2023-11-12 00:51:10,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:10,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:10,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:10,596 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 223 proven. 66 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-12 00:51:10,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:10,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020424147] [2023-11-12 00:51:10,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020424147] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:51:10,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226882642] [2023-11-12 00:51:10,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:51:10,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:51:10,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:51:10,599 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:51:10,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 00:51:10,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-12 00:51:10,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:51:10,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 00:51:10,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:51:10,958 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_32| Int)) (and (= |c_#valid| (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_32| 0)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_32|) 0))) is different from true [2023-11-12 00:51:10,960 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2023-11-12 00:51:10,960 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:51:10,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226882642] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:51:10,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:51:10,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [10] total 12 [2023-11-12 00:51:10,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681211752] [2023-11-12 00:51:10,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:51:10,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:51:10,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:51:10,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:51:10,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=91, Unknown=1, NotChecked=20, Total=156 [2023-11-12 00:51:10,963 INFO L87 Difference]: Start difference. First operand 77 states and 87 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) [2023-11-12 00:51:11,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:51:11,004 INFO L93 Difference]: Finished difference Result 78 states and 87 transitions. [2023-11-12 00:51:11,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:51:11,005 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 60 [2023-11-12 00:51:11,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:51:11,006 INFO L225 Difference]: With dead ends: 78 [2023-11-12 00:51:11,006 INFO L226 Difference]: Without dead ends: 77 [2023-11-12 00:51:11,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=91, Unknown=1, NotChecked=20, Total=156 [2023-11-12 00:51:11,007 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:51:11,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 4 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2023-11-12 00:51:11,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-12 00:51:11,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2023-11-12 00:51:11,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0657894736842106) internal successors, (81), 76 states have internal predecessors, (81), 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) [2023-11-12 00:51:11,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2023-11-12 00:51:11,020 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 60 [2023-11-12 00:51:11,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:51:11,020 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2023-11-12 00:51:11,021 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) [2023-11-12 00:51:11,021 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2023-11-12 00:51:11,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-12 00:51:11,023 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:11,023 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1] [2023-11-12 00:51:11,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-12 00:51:11,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-12 00:51:11,229 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-12 00:51:11,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:11,229 INFO L85 PathProgramCache]: Analyzing trace with hash 2015911434, now seen corresponding path program 1 times [2023-11-12 00:51:11,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:11,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271312218] [2023-11-12 00:51:11,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:11,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:11,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:11,520 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2023-11-12 00:51:11,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:11,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271312218] [2023-11-12 00:51:11,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271312218] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:51:11,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581998555] [2023-11-12 00:51:11,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:11,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:51:11,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:51:11,523 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:51:11,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-12 00:51:11,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:11,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 00:51:11,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:51:11,869 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 201 proven. 88 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-11-12 00:51:11,870 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:51:12,036 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 201 proven. 88 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-11-12 00:51:12,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581998555] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:51:12,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1968180669] [2023-11-12 00:51:12,039 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-12 00:51:12,039 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:51:12,040 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:51:12,040 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:51:12,040 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:51:12,564 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:51:13,058 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4097#(and (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_33| Int) (|v_ULTIMATE.start_main_~#b~0#1.offset_28| Int) (|v_#valid_54| (Array Int Int))) (and (= |ULTIMATE.start_main_~i~1#1| (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_33|) (+ |v_ULTIMATE.start_main_~#b~0#1.offset_28| (* |ULTIMATE.start_main_~i~1#1| 4) (- 4))) 1)) (= (store |v_#valid_54| |v_ULTIMATE.start_main_~#b~0#1.base_33| 0) |#valid|) (<= (+ |v_ULTIMATE.start_main_~#b~0#1.offset_28| (* |ULTIMATE.start_main_~i~1#1| 4)) (select |#length| |v_ULTIMATE.start_main_~#b~0#1.base_33|)) (= (select |v_#valid_54| |v_ULTIMATE.start_main_~#b~0#1.base_33|) 1) (<= 4 (+ |v_ULTIMATE.start_main_~#b~0#1.offset_28| (* |ULTIMATE.start_main_~i~1#1| 4))))) (<= |ULTIMATE.start_foo_#res#1| 2147483647) (<= 0 |ULTIMATE.start_foo_#res#1|) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2023-11-12 00:51:13,058 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:51:13,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:51:13,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 22 [2023-11-12 00:51:13,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389562602] [2023-11-12 00:51:13,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:51:13,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-12 00:51:13,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:51:13,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-12 00:51:13,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=854, Unknown=0, NotChecked=0, Total=992 [2023-11-12 00:51:13,060 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 22 states, 22 states have (on average 3.772727272727273) internal successors, (83), 22 states have internal predecessors, (83), 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) [2023-11-12 00:51:14,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:51:14,093 INFO L93 Difference]: Finished difference Result 125 states and 131 transitions. [2023-11-12 00:51:14,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-12 00:51:14,094 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.772727272727273) internal successors, (83), 22 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2023-11-12 00:51:14,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:51:14,095 INFO L225 Difference]: With dead ends: 125 [2023-11-12 00:51:14,095 INFO L226 Difference]: Without dead ends: 125 [2023-11-12 00:51:14,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 206 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=692, Invalid=3340, Unknown=0, NotChecked=0, Total=4032 [2023-11-12 00:51:14,098 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 219 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:51:14,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 8 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:51:14,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-11-12 00:51:14,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 101. [2023-11-12 00:51:14,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.06) internal successors, (106), 100 states have internal predecessors, (106), 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) [2023-11-12 00:51:14,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 106 transitions. [2023-11-12 00:51:14,102 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 106 transitions. Word has length 76 [2023-11-12 00:51:14,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:51:14,102 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 106 transitions. [2023-11-12 00:51:14,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.772727272727273) internal successors, (83), 22 states have internal predecessors, (83), 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) [2023-11-12 00:51:14,103 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 106 transitions. [2023-11-12 00:51:14,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-12 00:51:14,104 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:14,104 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1] [2023-11-12 00:51:14,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-12 00:51:14,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:51:14,311 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)] === [2023-11-12 00:51:14,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:14,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1548208291, now seen corresponding path program 2 times [2023-11-12 00:51:14,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:14,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622630234] [2023-11-12 00:51:14,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:14,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:14,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:14,651 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 655 trivial. 0 not checked. [2023-11-12 00:51:14,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:14,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622630234] [2023-11-12 00:51:14,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622630234] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:51:14,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318697998] [2023-11-12 00:51:14,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:51:14,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:51:14,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:51:14,654 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:51:14,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-12 00:51:14,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-12 00:51:14,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:51:14,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 00:51:14,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:51:15,174 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_34| Int)) (and (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_34|) 0) (= |c_#valid| (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_34| 0)))) is different from true [2023-11-12 00:51:15,175 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 725 trivial. 0 not checked. [2023-11-12 00:51:15,176 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:51:15,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318697998] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:51:15,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:51:15,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [10] total 12 [2023-11-12 00:51:15,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993288779] [2023-11-12 00:51:15,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:51:15,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:51:15,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:51:15,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:51:15,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=64, Unknown=1, NotChecked=18, Total=132 [2023-11-12 00:51:15,178 INFO L87 Difference]: Start difference. First operand 101 states and 106 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) [2023-11-12 00:51:15,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:51:15,200 INFO L93 Difference]: Finished difference Result 100 states and 105 transitions. [2023-11-12 00:51:15,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:51:15,200 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 100 [2023-11-12 00:51:15,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:51:15,202 INFO L225 Difference]: With dead ends: 100 [2023-11-12 00:51:15,202 INFO L226 Difference]: Without dead ends: 0 [2023-11-12 00:51:15,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=64, Unknown=1, NotChecked=18, Total=132 [2023-11-12 00:51:15,203 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:51:15,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 11 Unchecked, 0.0s Time] [2023-11-12 00:51:15,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-12 00:51:15,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-12 00:51:15,211 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) [2023-11-12 00:51:15,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-12 00:51:15,212 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 100 [2023-11-12 00:51:15,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:51:15,212 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-12 00:51:15,212 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) [2023-11-12 00:51:15,213 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-12 00:51:15,213 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-12 00:51:15,216 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX (7 of 8 remaining) [2023-11-12 00:51:15,216 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 8 remaining) [2023-11-12 00:51:15,216 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2023-11-12 00:51:15,217 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2023-11-12 00:51:15,217 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 8 remaining) [2023-11-12 00:51:15,217 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 8 remaining) [2023-11-12 00:51:15,217 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 8 remaining) [2023-11-12 00:51:15,217 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2023-11-12 00:51:15,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-12 00:51:15,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:51:15,426 INFO L445 BasicCegarLoop]: Path program histogram: [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:51:15,427 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-11-12 00:51:15,431 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 12:51:15 BoogieIcfgContainer [2023-11-12 00:51:15,431 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-12 00:51:15,432 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-12 00:51:15,432 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-12 00:51:15,433 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-12 00:51:15,433 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:50:51" (3/4) ... [2023-11-12 00:51:15,435 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-12 00:51:15,447 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2023-11-12 00:51:15,448 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2023-11-12 00:51:15,448 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-11-12 00:51:15,449 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-12 00:51:15,518 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/witness.graphml [2023-11-12 00:51:15,519 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/witness.yml [2023-11-12 00:51:15,519 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-12 00:51:15,520 INFO L158 Benchmark]: Toolchain (without parser) took 25002.22ms. Allocated memory was 123.7MB in the beginning and 371.2MB in the end (delta: 247.5MB). Free memory was 79.5MB in the beginning and 255.4MB in the end (delta: -175.8MB). Peak memory consumption was 73.7MB. Max. memory is 16.1GB. [2023-11-12 00:51:15,520 INFO L158 Benchmark]: CDTParser took 0.40ms. Allocated memory is still 123.7MB. Free memory is still 93.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 00:51:15,520 INFO L158 Benchmark]: CACSL2BoogieTranslator took 282.14ms. Allocated memory is still 123.7MB. Free memory was 79.5MB in the beginning and 69.4MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-12 00:51:15,521 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.59ms. Allocated memory is still 123.7MB. Free memory was 69.4MB in the beginning and 67.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-12 00:51:15,522 INFO L158 Benchmark]: Boogie Preprocessor took 26.22ms. Allocated memory is still 123.7MB. Free memory was 67.7MB in the beginning and 66.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-12 00:51:15,522 INFO L158 Benchmark]: RCFGBuilder took 435.28ms. Allocated memory is still 123.7MB. Free memory was 66.5MB in the beginning and 52.6MB in the end (delta: 13.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-12 00:51:15,522 INFO L158 Benchmark]: TraceAbstraction took 24129.85ms. Allocated memory was 123.7MB in the beginning and 371.2MB in the end (delta: 247.5MB). Free memory was 52.2MB in the beginning and 259.5MB in the end (delta: -207.3MB). Peak memory consumption was 42.3MB. Max. memory is 16.1GB. [2023-11-12 00:51:15,523 INFO L158 Benchmark]: Witness Printer took 86.72ms. Allocated memory is still 371.2MB. Free memory was 259.5MB in the beginning and 255.4MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-12 00:51:15,525 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40ms. Allocated memory is still 123.7MB. Free memory is still 93.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 282.14ms. Allocated memory is still 123.7MB. Free memory was 79.5MB in the beginning and 69.4MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.59ms. Allocated memory is still 123.7MB. Free memory was 69.4MB in the beginning and 67.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.22ms. Allocated memory is still 123.7MB. Free memory was 67.7MB in the beginning and 66.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 435.28ms. Allocated memory is still 123.7MB. Free memory was 66.5MB in the beginning and 52.6MB in the end (delta: 13.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 24129.85ms. Allocated memory was 123.7MB in the beginning and 371.2MB in the end (delta: 247.5MB). Free memory was 52.2MB in the beginning and 259.5MB in the end (delta: -207.3MB). Peak memory consumption was 42.3MB. Max. memory is 16.1GB. * Witness Printer took 86.72ms. Allocated memory is still 371.2MB. Free memory was 259.5MB in the beginning and 255.4MB in the end (delta: 4.2MB). 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: 15]: 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: 20]: 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: 24.1s, OverallIterations: 20, TraceHistogramMax: 18, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 3.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 596 SdHoareTripleChecker+Valid, 1.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 596 mSDsluCounter, 248 SdHoareTripleChecker+Invalid, 1.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 24 IncrementalHoareTripleChecker+Unchecked, 154 mSDsCounter, 119 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1614 IncrementalHoareTripleChecker+Invalid, 1757 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 119 mSolverCounterUnsat, 94 mSDtfsCounter, 1614 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1122 GetRequests, 823 SyntacticMatches, 18 SemanticMatches, 281 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1938 ImplicationChecksByTransitivity, 6.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=101occurred in iteration=19, InterpolantAutomatonStates: 159, 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, 20 MinimizatonAttempts, 134 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 5.9s InterpolantComputationTime, 923 NumberOfCodeBlocks, 746 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 1145 ConstructedInterpolants, 2 QuantifiedInterpolants, 6157 SizeOfPredicates, 40 NumberOfNonLiveVariables, 1918 ConjunctsInSsa, 138 ConjunctsInUnsatCore, 45 InterpolantComputations, 9 PerfectInterpolantSequences, 3760/4500 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: OVERALL_TIME: 0.8s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 11, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 23, TOOLS_POST_TIME: 0.5s, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 23, TOOLS_QUANTIFIERELIM_TIME: 0.5s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 45, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 3, DOMAIN_JOIN_TIME: 0.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME: 0.1s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 4, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 11, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 2, LOOP_SUMMARIZER_CACHE_MISSES: 2, LOOP_SUMMARIZER_OVERALL_TIME: 0.5s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.5s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 4, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 101, DAG_COMPRESSION_RETAINED_NODES: 44, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-12 00:51:15,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d507f2b2-12c5-4d09-bf08-0bb86a7228f3/bin/utaipan-verify-NcY6lQBIFX/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