./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-15/cstrchr_reverse_alloca.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdd8268-c7b8-4433-a922-99d0b024f1f6/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdd8268-c7b8-4433-a922-99d0b024f1f6/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_afdd8268-c7b8-4433-a922-99d0b024f1f6/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdd8268-c7b8-4433-a922-99d0b024f1f6/bin/utaipan-verify-NcY6lQBIFX/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-15/cstrchr_reverse_alloca.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdd8268-c7b8-4433-a922-99d0b024f1f6/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdd8268-c7b8-4433-a922-99d0b024f1f6/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 64bit --witnessprinter.graph.data.programhash c2261b8075e5a5018e09c71b2ef98f1a55d20ac7ba7a361137d9c5ebaba61150 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 01:00:17,267 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 01:00:17,405 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdd8268-c7b8-4433-a922-99d0b024f1f6/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2023-11-12 01:00:17,413 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 01:00:17,414 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 01:00:17,451 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 01:00:17,452 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 01:00:17,453 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 01:00:17,454 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 01:00:17,459 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 01:00:17,460 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 01:00:17,461 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 01:00:17,462 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 01:00:17,463 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 01:00:17,464 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 01:00:17,465 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 01:00:17,465 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 01:00:17,466 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 01:00:17,466 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 01:00:17,467 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 01:00:17,467 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 01:00:17,468 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 01:00:17,469 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 01:00:17,469 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 01:00:17,470 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 01:00:17,471 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 01:00:17,471 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 01:00:17,472 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 01:00:17,472 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 01:00:17,473 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 01:00:17,474 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 01:00:17,475 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 01:00:17,475 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 01:00:17,475 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 01:00:17,476 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 01:00:17,476 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 01:00:17,476 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:00:17,477 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 01:00:17,477 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 01:00:17,477 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 01:00:17,478 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 01:00:17,478 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 01:00:17,478 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 01:00:17,479 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_afdd8268-c7b8-4433-a922-99d0b024f1f6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdd8268-c7b8-4433-a922-99d0b024f1f6/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2261b8075e5a5018e09c71b2ef98f1a55d20ac7ba7a361137d9c5ebaba61150 [2023-11-12 01:00:17,864 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 01:00:17,893 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 01:00:17,896 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 01:00:17,897 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 01:00:17,897 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 01:00:17,899 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdd8268-c7b8-4433-a922-99d0b024f1f6/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/termination-15/cstrchr_reverse_alloca.i [2023-11-12 01:00:20,878 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 01:00:21,175 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 01:00:21,176 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdd8268-c7b8-4433-a922-99d0b024f1f6/sv-benchmarks/c/termination-15/cstrchr_reverse_alloca.i [2023-11-12 01:00:21,191 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdd8268-c7b8-4433-a922-99d0b024f1f6/bin/utaipan-verify-NcY6lQBIFX/data/e4df6f21a/d01c409ce6924bf180e20f5f53b82f7c/FLAG872ea00da [2023-11-12 01:00:21,212 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdd8268-c7b8-4433-a922-99d0b024f1f6/bin/utaipan-verify-NcY6lQBIFX/data/e4df6f21a/d01c409ce6924bf180e20f5f53b82f7c [2023-11-12 01:00:21,214 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 01:00:21,216 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 01:00:21,217 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 01:00:21,217 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 01:00:21,223 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 01:00:21,224 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:00:21" (1/1) ... [2023-11-12 01:00:21,225 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3535507b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:21, skipping insertion in model container [2023-11-12 01:00:21,225 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:00:21" (1/1) ... [2023-11-12 01:00:21,317 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 01:00:21,626 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:00:21,641 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 01:00:21,716 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:00:21,763 INFO L206 MainTranslator]: Completed translation [2023-11-12 01:00:21,763 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:21 WrapperNode [2023-11-12 01:00:21,764 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 01:00:21,765 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 01:00:21,765 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 01:00:21,765 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 01:00:21,773 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:21" (1/1) ... [2023-11-12 01:00:21,800 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:21" (1/1) ... [2023-11-12 01:00:21,828 INFO L138 Inliner]: procedures = 152, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 49 [2023-11-12 01:00:21,828 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 01:00:21,829 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 01:00:21,829 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 01:00:21,829 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 01:00:21,839 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:21" (1/1) ... [2023-11-12 01:00:21,840 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:21" (1/1) ... [2023-11-12 01:00:21,855 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:21" (1/1) ... [2023-11-12 01:00:21,855 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:21" (1/1) ... [2023-11-12 01:00:21,860 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:21" (1/1) ... [2023-11-12 01:00:21,869 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:21" (1/1) ... [2023-11-12 01:00:21,871 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:21" (1/1) ... [2023-11-12 01:00:21,874 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:21" (1/1) ... [2023-11-12 01:00:21,879 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 01:00:21,883 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 01:00:21,884 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 01:00:21,884 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 01:00:21,885 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:21" (1/1) ... [2023-11-12 01:00:21,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:00:21,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdd8268-c7b8-4433-a922-99d0b024f1f6/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:21,930 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdd8268-c7b8-4433-a922-99d0b024f1f6/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 01:00:21,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdd8268-c7b8-4433-a922-99d0b024f1f6/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 01:00:21,971 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 01:00:21,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 01:00:21,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 01:00:21,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 01:00:21,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 01:00:21,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 01:00:22,056 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 01:00:22,058 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 01:00:22,222 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 01:00:22,283 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 01:00:22,284 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 01:00:22,286 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:00:22 BoogieIcfgContainer [2023-11-12 01:00:22,286 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 01:00:22,289 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 01:00:22,290 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 01:00:22,293 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 01:00:22,294 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 01:00:21" (1/3) ... [2023-11-12 01:00:22,294 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5233b02f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:00:22, skipping insertion in model container [2023-11-12 01:00:22,295 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:21" (2/3) ... [2023-11-12 01:00:22,295 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5233b02f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:00:22, skipping insertion in model container [2023-11-12 01:00:22,295 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:00:22" (3/3) ... [2023-11-12 01:00:22,297 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrchr_reverse_alloca.i [2023-11-12 01:00:22,314 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 01:00:22,315 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2023-11-12 01:00:22,358 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 01:00:22,364 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;@ba8e61c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 01:00:22,365 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-12 01:00:22,369 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 8 states have (on average 2.5) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:00:22,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-12 01:00:22,375 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:22,376 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-12 01:00:22,376 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 01:00:22,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:22,382 INFO L85 PathProgramCache]: Analyzing trace with hash 2801, now seen corresponding path program 1 times [2023-11-12 01:00:22,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:22,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251090438] [2023-11-12 01:00:22,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:22,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:22,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:22,663 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 01:00:22,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:22,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251090438] [2023-11-12 01:00:22,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251090438] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:22,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:00:22,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 01:00:22,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328322260] [2023-11-12 01:00:22,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:22,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:00:22,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:22,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:00:22,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:00:22,700 INFO L87 Difference]: Start difference. First operand has 18 states, 8 states have (on average 2.5) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 01:00:22,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:22,742 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2023-11-12 01:00:22,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:00:22,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2023-11-12 01:00:22,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:22,752 INFO L225 Difference]: With dead ends: 17 [2023-11-12 01:00:22,752 INFO L226 Difference]: Without dead ends: 16 [2023-11-12 01:00:22,754 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 01:00:22,771 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:22,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 8 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 01:00:22,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-12 01:00:22,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-11-12 01:00:22,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 8 states have (on average 2.125) internal successors, (17), 15 states have internal predecessors, (17), 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 01:00:22,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2023-11-12 01:00:22,813 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 2 [2023-11-12 01:00:22,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:22,813 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2023-11-12 01:00:22,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 01:00:22,814 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2023-11-12 01:00:22,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-12 01:00:22,814 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:22,814 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-12 01:00:22,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 01:00:22,815 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 01:00:22,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:22,816 INFO L85 PathProgramCache]: Analyzing trace with hash 2802, now seen corresponding path program 1 times [2023-11-12 01:00:22,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:22,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334614870] [2023-11-12 01:00:22,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:22,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:22,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:23,113 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 01:00:23,113 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:23,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334614870] [2023-11-12 01:00:23,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334614870] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:23,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:00:23,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 01:00:23,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611270302] [2023-11-12 01:00:23,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:23,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:00:23,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:23,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:00:23,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:00:23,117 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 01:00:23,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:23,163 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2023-11-12 01:00:23,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:00:23,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2023-11-12 01:00:23,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:23,165 INFO L225 Difference]: With dead ends: 15 [2023-11-12 01:00:23,165 INFO L226 Difference]: Without dead ends: 15 [2023-11-12 01:00:23,165 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 01:00:23,167 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:23,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 01:00:23,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-12 01:00:23,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-12 01:00:23,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 8 states have (on average 2.0) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:00:23,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2023-11-12 01:00:23,177 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 2 [2023-11-12 01:00:23,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:23,178 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2023-11-12 01:00:23,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 01:00:23,179 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2023-11-12 01:00:23,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-12 01:00:23,179 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:23,180 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-12 01:00:23,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 01:00:23,180 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 01:00:23,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:23,182 INFO L85 PathProgramCache]: Analyzing trace with hash 88059, now seen corresponding path program 1 times [2023-11-12 01:00:23,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:23,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290605992] [2023-11-12 01:00:23,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:23,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:23,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:23,291 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 01:00:23,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:23,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290605992] [2023-11-12 01:00:23,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290605992] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:23,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:00:23,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 01:00:23,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656683348] [2023-11-12 01:00:23,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:23,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:00:23,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:23,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:00:23,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:00:23,295 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 01:00:23,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:23,318 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2023-11-12 01:00:23,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:00:23,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 3 [2023-11-12 01:00:23,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:23,320 INFO L225 Difference]: With dead ends: 12 [2023-11-12 01:00:23,320 INFO L226 Difference]: Without dead ends: 12 [2023-11-12 01:00:23,321 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 01:00:23,322 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:23,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 4 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 01:00:23,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-11-12 01:00:23,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-11-12 01:00:23,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 8 states have (on average 1.625) internal successors, (13), 11 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 01:00:23,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2023-11-12 01:00:23,327 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 3 [2023-11-12 01:00:23,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:23,327 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2023-11-12 01:00:23,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 01:00:23,328 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2023-11-12 01:00:23,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-12 01:00:23,328 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:23,328 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-12 01:00:23,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 01:00:23,329 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 01:00:23,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:23,330 INFO L85 PathProgramCache]: Analyzing trace with hash 88060, now seen corresponding path program 1 times [2023-11-12 01:00:23,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:23,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092456102] [2023-11-12 01:00:23,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:23,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:23,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:23,795 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 01:00:23,796 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:23,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092456102] [2023-11-12 01:00:23,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092456102] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:23,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:00:23,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 01:00:23,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774211122] [2023-11-12 01:00:23,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:23,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:00:23,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:23,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:00:23,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:00:23,801 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 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 01:00:23,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:23,855 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2023-11-12 01:00:23,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 01:00:23,856 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 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 3 [2023-11-12 01:00:23,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:23,856 INFO L225 Difference]: With dead ends: 11 [2023-11-12 01:00:23,857 INFO L226 Difference]: Without dead ends: 11 [2023-11-12 01:00:23,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:00:23,868 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:23,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 01:00:23,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-11-12 01:00:23,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-11-12 01:00:23,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 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 01:00:23,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2023-11-12 01:00:23,876 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 3 [2023-11-12 01:00:23,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:23,877 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2023-11-12 01:00:23,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 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 01:00:23,877 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2023-11-12 01:00:23,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-12 01:00:23,878 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:23,878 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 01:00:23,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 01:00:23,880 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 01:00:23,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:23,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1670558767, now seen corresponding path program 1 times [2023-11-12 01:00:23,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:23,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765611744] [2023-11-12 01:00:23,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:23,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:23,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:23,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:00:23,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:23,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765611744] [2023-11-12 01:00:23,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765611744] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:23,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:00:23,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 01:00:23,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335251201] [2023-11-12 01:00:23,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:23,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:00:23,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:23,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:00:23,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:00:23,926 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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 01:00:23,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:23,949 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2023-11-12 01:00:23,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:00:23,950 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-12 01:00:23,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:23,951 INFO L225 Difference]: With dead ends: 12 [2023-11-12 01:00:23,951 INFO L226 Difference]: Without dead ends: 12 [2023-11-12 01:00:23,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 01:00:23,958 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:23,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 01:00:23,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-11-12 01:00:23,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-11-12 01:00:23,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 10 states have (on average 1.3) internal successors, (13), 11 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 01:00:23,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2023-11-12 01:00:23,975 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 6 [2023-11-12 01:00:23,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:23,976 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2023-11-12 01:00:23,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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 01:00:23,976 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2023-11-12 01:00:23,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-12 01:00:23,977 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:23,977 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:00:23,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 01:00:23,978 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 01:00:23,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:23,978 INFO L85 PathProgramCache]: Analyzing trace with hash -247875157, now seen corresponding path program 1 times [2023-11-12 01:00:23,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:23,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587055907] [2023-11-12 01:00:23,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:23,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:24,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:24,394 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 01:00:24,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:24,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587055907] [2023-11-12 01:00:24,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587055907] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:00:24,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045774618] [2023-11-12 01:00:24,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:24,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:24,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdd8268-c7b8-4433-a922-99d0b024f1f6/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:24,402 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdd8268-c7b8-4433-a922-99d0b024f1f6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:00:24,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdd8268-c7b8-4433-a922-99d0b024f1f6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 01:00:24,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:24,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-12 01:00:24,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:00:24,558 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 01:00:24,607 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 01:00:24,608 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 29 treesize of output 25 [2023-11-12 01:00:24,653 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 01:00:24,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:00:24,729 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-12 01:00:24,742 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-12 01:00:24,747 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-11-12 01:00:24,759 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 01:00:24,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045774618] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:00:24,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [920755189] [2023-11-12 01:00:24,779 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-12 01:00:24,779 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:00:24,784 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:00:24,789 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:00:24,790 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:00:25,597 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:00:26,166 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '218#(and (<= 0 (+ |ULTIMATE.start_main_#t~nondet212#1| 2147483648)) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrchr_#in~s#1.base|) (or (< |ULTIMATE.start_cstrchr_~s#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrchr_~s#1.base|) (+ |ULTIMATE.start_cstrchr_~s#1.offset| 1))) (<= 2 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= |ULTIMATE.start_cstrchr_~c#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc211#1.offset| 0) (<= |ULTIMATE.start_main_#t~nondet212#1| 2147483647) (<= 0 (+ |ULTIMATE.start_cstrchr_#in~c#1| 2147483648)) (<= 2 |ULTIMATE.start_cstrchr_~s#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc211#1.base|) (<= 0 (+ |ULTIMATE.start_cstrchr_~c#1| 2147483648)) (<= |ULTIMATE.start_cstrchr_#in~c#1| 2147483647))' at error location [2023-11-12 01:00:26,166 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:00:26,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:00:26,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-12 01:00:26,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113360460] [2023-11-12 01:00:26,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:00:26,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 01:00:26,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:26,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 01:00:26,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-11-12 01:00:26,174 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 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 01:00:26,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:26,388 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2023-11-12 01:00:26,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 01:00:26,388 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 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 01:00:26,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:26,390 INFO L225 Difference]: With dead ends: 18 [2023-11-12 01:00:26,390 INFO L226 Difference]: Without dead ends: 18 [2023-11-12 01:00:26,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2023-11-12 01:00:26,392 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 19 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:26,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 13 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:00:26,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-12 01:00:26,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 10. [2023-11-12 01:00:26,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:00:26,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2023-11-12 01:00:26,395 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2023-11-12 01:00:26,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:26,395 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2023-11-12 01:00:26,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 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 01:00:26,396 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2023-11-12 01:00:26,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-12 01:00:26,396 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:26,396 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:00:26,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdd8268-c7b8-4433-a922-99d0b024f1f6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 01:00:26,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdd8268-c7b8-4433-a922-99d0b024f1f6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:26,602 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-12 01:00:26,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:26,602 INFO L85 PathProgramCache]: Analyzing trace with hash -247715015, now seen corresponding path program 1 times [2023-11-12 01:00:26,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:26,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213318959] [2023-11-12 01:00:26,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:26,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:26,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:26,678 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 01:00:26,678 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:26,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213318959] [2023-11-12 01:00:26,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213318959] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:26,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:00:26,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 01:00:26,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93963328] [2023-11-12 01:00:26,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:26,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:00:26,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:26,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:00:26,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:00:26,682 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:00:26,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:26,698 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2023-11-12 01:00:26,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 01:00:26,699 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-12 01:00:26,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:26,700 INFO L225 Difference]: With dead ends: 9 [2023-11-12 01:00:26,700 INFO L226 Difference]: Without dead ends: 0 [2023-11-12 01:00:26,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:00:26,702 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:26,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 8 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 01:00:26,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-12 01:00:26,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-12 01:00:26,704 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 01:00:26,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-12 01:00:26,704 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 7 [2023-11-12 01:00:26,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:26,705 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-12 01:00:26,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:00:26,705 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-12 01:00:26,705 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-12 01:00:26,709 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 9 remaining) [2023-11-12 01:00:26,709 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 9 remaining) [2023-11-12 01:00:26,710 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2023-11-12 01:00:26,710 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2023-11-12 01:00:26,710 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 9 remaining) [2023-11-12 01:00:26,710 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 9 remaining) [2023-11-12 01:00:26,710 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 9 remaining) [2023-11-12 01:00:26,711 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 9 remaining) [2023-11-12 01:00:26,711 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2023-11-12 01:00:26,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 01:00:26,715 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:00:26,717 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-11-12 01:00:26,721 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 01:00:26 BoogieIcfgContainer [2023-11-12 01:00:26,721 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-12 01:00:26,722 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-12 01:00:26,722 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-12 01:00:26,722 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-12 01:00:26,723 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:00:22" (3/4) ... [2023-11-12 01:00:26,725 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-12 01:00:26,735 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2023-11-12 01:00:26,736 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2023-11-12 01:00:26,736 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-11-12 01:00:26,736 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-11-12 01:00:26,823 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdd8268-c7b8-4433-a922-99d0b024f1f6/bin/utaipan-verify-NcY6lQBIFX/witness.graphml [2023-11-12 01:00:26,824 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdd8268-c7b8-4433-a922-99d0b024f1f6/bin/utaipan-verify-NcY6lQBIFX/witness.yml [2023-11-12 01:00:26,824 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-12 01:00:26,825 INFO L158 Benchmark]: Toolchain (without parser) took 5609.14ms. Allocated memory was 148.9MB in the beginning and 180.4MB in the end (delta: 31.5MB). Free memory was 110.9MB in the beginning and 110.4MB in the end (delta: 502.7kB). Peak memory consumption was 34.0MB. Max. memory is 16.1GB. [2023-11-12 01:00:26,825 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 123.7MB. Free memory is still 91.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 01:00:26,825 INFO L158 Benchmark]: CACSL2BoogieTranslator took 547.05ms. Allocated memory is still 148.9MB. Free memory was 110.6MB in the beginning and 104.2MB in the end (delta: 6.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-12 01:00:26,826 INFO L158 Benchmark]: Boogie Procedure Inliner took 63.52ms. Allocated memory is still 148.9MB. Free memory was 104.2MB in the beginning and 102.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-12 01:00:26,826 INFO L158 Benchmark]: Boogie Preprocessor took 53.40ms. Allocated memory is still 148.9MB. Free memory was 102.2MB in the beginning and 101.0MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 01:00:26,827 INFO L158 Benchmark]: RCFGBuilder took 403.36ms. Allocated memory is still 148.9MB. Free memory was 101.0MB in the beginning and 86.3MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-11-12 01:00:26,827 INFO L158 Benchmark]: TraceAbstraction took 4432.02ms. Allocated memory was 148.9MB in the beginning and 180.4MB in the end (delta: 31.5MB). Free memory was 85.8MB in the beginning and 114.6MB in the end (delta: -28.8MB). Peak memory consumption was 4.1MB. Max. memory is 16.1GB. [2023-11-12 01:00:26,828 INFO L158 Benchmark]: Witness Printer took 102.02ms. Allocated memory is still 180.4MB. Free memory was 114.6MB in the beginning and 110.4MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-12 01:00:26,830 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 123.7MB. Free memory is still 91.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 547.05ms. Allocated memory is still 148.9MB. Free memory was 110.6MB in the beginning and 104.2MB in the end (delta: 6.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 63.52ms. Allocated memory is still 148.9MB. Free memory was 104.2MB in the beginning and 102.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 53.40ms. Allocated memory is still 148.9MB. Free memory was 102.2MB in the beginning and 101.0MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 403.36ms. Allocated memory is still 148.9MB. Free memory was 101.0MB in the beginning and 86.3MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 4432.02ms. Allocated memory was 148.9MB in the beginning and 180.4MB in the end (delta: 31.5MB). Free memory was 85.8MB in the beginning and 114.6MB in the end (delta: -28.8MB). Peak memory consumption was 4.1MB. Max. memory is 16.1GB. * Witness Printer took 102.02ms. Allocated memory is still 180.4MB. Free memory was 114.6MB in the beginning and 110.4MB 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: -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: -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: 370]: 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, 18 locations, 9 error locations. Started 1 CEGAR loops. OverallTime: 4.4s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 48 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 48 mSDsluCounter, 68 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 28 mSDsCounter, 9 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 164 IncrementalHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9 mSolverCounterUnsat, 40 mSDtfsCounter, 164 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, InterpolantAutomatonStates: 30, 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, 7 MinimizatonAttempts, 8 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 37 NumberOfCodeBlocks, 37 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 35 ConstructedInterpolants, 0 QuantifiedInterpolants, 290 SizeOfPredicates, 10 NumberOfNonLiveVariables, 72 ConjunctsInSsa, 26 ConjunctsInUnsatCore, 9 InterpolantComputations, 6 PerfectInterpolantSequences, 1/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 9 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-12 01:00:26,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afdd8268-c7b8-4433-a922-99d0b024f1f6/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