./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrcspn-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff 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_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrcspn-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ --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 15fe42cb945ebd9019cc38134c29264613097f232589ff55d01d33d66b19d85f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:52:21,614 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:52:21,691 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-19 04:52:21,697 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:52:21,697 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:52:21,724 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:52:21,725 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:52:21,725 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:52:21,726 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:52:21,726 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:52:21,727 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:52:21,728 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:52:21,728 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:52:21,729 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:52:21,729 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:52:21,730 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:52:21,730 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:52:21,731 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:52:21,731 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:52:21,732 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:52:21,732 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:52:21,733 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:52:21,734 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 04:52:21,734 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 04:52:21,735 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:52:21,735 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:52:21,735 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:52:21,736 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:52:21,736 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:52:21,737 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 04:52:21,737 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 04:52:21,737 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 04:52:21,738 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:52:21,738 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 04:52:21,738 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 04:52:21,738 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:52:21,738 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:52:21,739 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:52:21,739 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:52:21,739 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:52:21,739 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:52:21,740 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:52:21,740 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:52:21,740 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:52:21,740 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:52:21,741 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:52:21,741 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_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 15fe42cb945ebd9019cc38134c29264613097f232589ff55d01d33d66b19d85f [2023-11-19 04:52:22,006 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:52:22,031 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:52:22,034 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:52:22,035 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:52:22,037 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:52:22,038 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/array-memsafety/cstrcspn-alloca-1.i [2023-11-19 04:52:25,261 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:52:25,554 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:52:25,554 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/sv-benchmarks/c/array-memsafety/cstrcspn-alloca-1.i [2023-11-19 04:52:25,571 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/data/b3ef70fc7/8225cf6958f44636804e47c444a0bcc8/FLAG8e1a6fe24 [2023-11-19 04:52:25,596 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/data/b3ef70fc7/8225cf6958f44636804e47c444a0bcc8 [2023-11-19 04:52:25,599 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:52:25,601 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:52:25,602 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:52:25,602 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:52:25,612 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:52:25,613 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:52:25" (1/1) ... [2023-11-19 04:52:25,614 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e43dbc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:25, skipping insertion in model container [2023-11-19 04:52:25,614 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:52:25" (1/1) ... [2023-11-19 04:52:25,693 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:52:26,090 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:52:26,102 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:52:26,138 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:52:26,169 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:52:26,170 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:26 WrapperNode [2023-11-19 04:52:26,170 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:52:26,171 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:52:26,171 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:52:26,171 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:52:26,179 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:26" (1/1) ... [2023-11-19 04:52:26,193 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:26" (1/1) ... [2023-11-19 04:52:26,217 INFO L138 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 107 [2023-11-19 04:52:26,217 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:52:26,218 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:52:26,218 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:52:26,218 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:52:26,227 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:26" (1/1) ... [2023-11-19 04:52:26,227 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:26" (1/1) ... [2023-11-19 04:52:26,231 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:26" (1/1) ... [2023-11-19 04:52:26,231 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:26" (1/1) ... [2023-11-19 04:52:26,238 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:26" (1/1) ... [2023-11-19 04:52:26,242 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:26" (1/1) ... [2023-11-19 04:52:26,244 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:26" (1/1) ... [2023-11-19 04:52:26,245 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:26" (1/1) ... [2023-11-19 04:52:26,248 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:52:26,249 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:52:26,249 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:52:26,249 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:52:26,250 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:26" (1/1) ... [2023-11-19 04:52:26,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:52:26,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:52:26,302 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:52:26,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:52:26,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 04:52:26,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 04:52:26,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 04:52:26,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 04:52:26,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:52:26,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:52:26,454 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:52:26,456 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:52:26,807 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:52:26,869 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:52:26,869 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-19 04:52:26,874 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:52:26 BoogieIcfgContainer [2023-11-19 04:52:26,875 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:52:26,877 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:52:26,877 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:52:26,881 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:52:26,881 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:52:25" (1/3) ... [2023-11-19 04:52:26,882 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f85d5e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:52:26, skipping insertion in model container [2023-11-19 04:52:26,882 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:52:26" (2/3) ... [2023-11-19 04:52:26,882 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f85d5e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:52:26, skipping insertion in model container [2023-11-19 04:52:26,883 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:52:26" (3/3) ... [2023-11-19 04:52:26,884 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrcspn-alloca-1.i [2023-11-19 04:52:26,905 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:52:26,905 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2023-11-19 04:52:26,953 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:52:26,960 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;@2ac80ba6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:52:26,961 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2023-11-19 04:52:26,965 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 38 states have internal predecessors, (46), 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) [2023-11-19 04:52:26,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-19 04:52:26,971 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:52:26,972 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-19 04:52:26,972 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-19 04:52:26,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:52:26,978 INFO L85 PathProgramCache]: Analyzing trace with hash 164108, now seen corresponding path program 1 times [2023-11-19 04:52:26,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:52:26,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680350544] [2023-11-19 04:52:26,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:52:26,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:52:27,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:52:27,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:52:27,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:52:27,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680350544] [2023-11-19 04:52:27,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680350544] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:52:27,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:52:27,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 04:52:27,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618871412] [2023-11-19 04:52:27,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:52:27,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:52:27,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:52:27,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:52:27,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:52:27,366 INFO L87 Difference]: Start difference. First operand has 39 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 38 states have internal predecessors, (46), 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 1.5) internal successors, (3), 2 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) [2023-11-19 04:52:27,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:52:27,429 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2023-11-19 04:52:27,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:52:27,431 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 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 [2023-11-19 04:52:27,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:52:27,439 INFO L225 Difference]: With dead ends: 37 [2023-11-19 04:52:27,439 INFO L226 Difference]: Without dead ends: 36 [2023-11-19 04:52:27,441 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 [2023-11-19 04:52:27,445 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 37 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 18 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 [2023-11-19 04:52:27,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 18 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:52:27,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-19 04:52:27,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-11-19 04:52:27,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 35 states have internal predecessors, (41), 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) [2023-11-19 04:52:27,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2023-11-19 04:52:27,481 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 3 [2023-11-19 04:52:27,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:52:27,482 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2023-11-19 04:52:27,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 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) [2023-11-19 04:52:27,482 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2023-11-19 04:52:27,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-19 04:52:27,483 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:52:27,483 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-19 04:52:27,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:52:27,483 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-19 04:52:27,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:52:27,484 INFO L85 PathProgramCache]: Analyzing trace with hash 164109, now seen corresponding path program 1 times [2023-11-19 04:52:27,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:52:27,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656218931] [2023-11-19 04:52:27,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:52:27,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:52:27,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:52:28,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:52:28,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:52:28,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656218931] [2023-11-19 04:52:28,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656218931] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:52:28,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:52:28,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:52:28,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521692658] [2023-11-19 04:52:28,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:52:28,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:52:28,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:52:28,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:52:28,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:52:28,018 INFO L87 Difference]: Start difference. First operand 36 states and 41 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) [2023-11-19 04:52:28,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:52:28,192 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2023-11-19 04:52:28,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:52:28,194 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 [2023-11-19 04:52:28,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:52:28,200 INFO L225 Difference]: With dead ends: 35 [2023-11-19 04:52:28,201 INFO L226 Difference]: Without dead ends: 35 [2023-11-19 04:52:28,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:52:28,203 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 1 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 65 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 [2023-11-19 04:52:28,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 65 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:52:28,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-19 04:52:28,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-11-19 04:52:28,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 34 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) [2023-11-19 04:52:28,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2023-11-19 04:52:28,218 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 3 [2023-11-19 04:52:28,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:52:28,218 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2023-11-19 04:52:28,218 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) [2023-11-19 04:52:28,219 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2023-11-19 04:52:28,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-19 04:52:28,219 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:52:28,219 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-19 04:52:28,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:52:28,220 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-19 04:52:28,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:52:28,222 INFO L85 PathProgramCache]: Analyzing trace with hash 5197514, now seen corresponding path program 1 times [2023-11-19 04:52:28,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:52:28,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423388065] [2023-11-19 04:52:28,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:52:28,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:52:28,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:52:28,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:52:28,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:52:28,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423388065] [2023-11-19 04:52:28,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423388065] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:52:28,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:52:28,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:52:28,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023009418] [2023-11-19 04:52:28,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:52:28,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:52:28,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:52:28,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:52:28,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:52:28,606 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) 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) [2023-11-19 04:52:28,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:52:28,668 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2023-11-19 04:52:28,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:52:28,668 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) 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 [2023-11-19 04:52:28,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:52:28,673 INFO L225 Difference]: With dead ends: 34 [2023-11-19 04:52:28,674 INFO L226 Difference]: Without dead ends: 34 [2023-11-19 04:52:28,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:52:28,677 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 72 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:52:28,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 18 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:52:28,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-19 04:52:28,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-11-19 04:52:28,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:52:28,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2023-11-19 04:52:28,682 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 4 [2023-11-19 04:52:28,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:52:28,683 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2023-11-19 04:52:28,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) 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) [2023-11-19 04:52:28,683 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2023-11-19 04:52:28,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-19 04:52:28,684 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:52:28,684 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-19 04:52:28,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:52:28,684 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-19 04:52:28,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:52:28,685 INFO L85 PathProgramCache]: Analyzing trace with hash 5194558, now seen corresponding path program 1 times [2023-11-19 04:52:28,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:52:28,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367772883] [2023-11-19 04:52:28,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:52:28,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:52:28,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:52:29,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:52:29,025 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:52:29,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367772883] [2023-11-19 04:52:29,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367772883] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:52:29,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:52:29,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:52:29,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209192348] [2023-11-19 04:52:29,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:52:29,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:52:29,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:52:29,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:52:29,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:52:29,030 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) 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) [2023-11-19 04:52:29,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:52:29,188 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2023-11-19 04:52:29,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:52:29,188 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) 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 [2023-11-19 04:52:29,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:52:29,191 INFO L225 Difference]: With dead ends: 61 [2023-11-19 04:52:29,192 INFO L226 Difference]: Without dead ends: 61 [2023-11-19 04:52:29,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:52:29,204 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 97 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:52:29,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 29 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:52:29,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-19 04:52:29,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 32. [2023-11-19 04:52:29,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 31 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) [2023-11-19 04:52:29,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2023-11-19 04:52:29,220 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 4 [2023-11-19 04:52:29,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:52:29,221 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2023-11-19 04:52:29,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) 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) [2023-11-19 04:52:29,222 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2023-11-19 04:52:29,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-19 04:52:29,222 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:52:29,222 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-19 04:52:29,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 04:52:29,223 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-19 04:52:29,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:52:29,225 INFO L85 PathProgramCache]: Analyzing trace with hash 5194559, now seen corresponding path program 1 times [2023-11-19 04:52:29,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:52:29,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684600016] [2023-11-19 04:52:29,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:52:29,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:52:29,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:52:29,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:52:29,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:52:29,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684600016] [2023-11-19 04:52:29,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684600016] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:52:29,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:52:29,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:52:29,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744826294] [2023-11-19 04:52:29,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:52:29,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:52:29,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:52:29,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:52:29,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:52:29,471 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 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) [2023-11-19 04:52:29,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:52:29,550 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2023-11-19 04:52:29,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:52:29,550 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 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 [2023-11-19 04:52:29,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:52:29,551 INFO L225 Difference]: With dead ends: 34 [2023-11-19 04:52:29,551 INFO L226 Difference]: Without dead ends: 34 [2023-11-19 04:52:29,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:52:29,562 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 38 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:52:29,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 48 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:52:29,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-19 04:52:29,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-11-19 04:52:29,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 33 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) [2023-11-19 04:52:29,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2023-11-19 04:52:29,573 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 4 [2023-11-19 04:52:29,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:52:29,573 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2023-11-19 04:52:29,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 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) [2023-11-19 04:52:29,574 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2023-11-19 04:52:29,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-19 04:52:29,574 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:52:29,574 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 04:52:29,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 04:52:29,575 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-19 04:52:29,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:52:29,576 INFO L85 PathProgramCache]: Analyzing trace with hash 161122929, now seen corresponding path program 1 times [2023-11-19 04:52:29,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:52:29,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952459797] [2023-11-19 04:52:29,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:52:29,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:52:29,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:52:29,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:52:29,796 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:52:29,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952459797] [2023-11-19 04:52:29,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952459797] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:52:29,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:52:29,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:52:29,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642446849] [2023-11-19 04:52:29,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:52:29,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:52:29,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:52:29,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:52:29,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:52:29,798 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:52:29,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:52:29,834 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2023-11-19 04:52:29,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:52:29,835 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-19 04:52:29,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:52:29,835 INFO L225 Difference]: With dead ends: 33 [2023-11-19 04:52:29,835 INFO L226 Difference]: Without dead ends: 33 [2023-11-19 04:52:29,836 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 [2023-11-19 04:52:29,837 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 65 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:52:29,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 16 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:52:29,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-19 04:52:29,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-11-19 04:52:29,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:52:29,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2023-11-19 04:52:29,840 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 5 [2023-11-19 04:52:29,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:52:29,841 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2023-11-19 04:52:29,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:52:29,841 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2023-11-19 04:52:29,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-19 04:52:29,842 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:52:29,842 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 04:52:29,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 04:52:29,842 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-19 04:52:29,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:52:29,843 INFO L85 PathProgramCache]: Analyzing trace with hash 699845551, now seen corresponding path program 1 times [2023-11-19 04:52:29,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:52:29,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571670355] [2023-11-19 04:52:29,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:52:29,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:52:29,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:52:29,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:52:29,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:52:29,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571670355] [2023-11-19 04:52:29,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571670355] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:52:29,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:52:29,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:52:29,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140053224] [2023-11-19 04:52:29,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:52:29,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:52:29,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:52:29,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:52:29,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:52:29,978 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:52:30,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:52:30,049 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2023-11-19 04:52:30,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:52:30,050 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-19 04:52:30,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:52:30,052 INFO L225 Difference]: With dead ends: 34 [2023-11-19 04:52:30,052 INFO L226 Difference]: Without dead ends: 34 [2023-11-19 04:52:30,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:52:30,054 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 89 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:52:30,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 16 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:52:30,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-19 04:52:30,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2023-11-19 04:52:30,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.8181818181818181) 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) [2023-11-19 04:52:30,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2023-11-19 04:52:30,065 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 6 [2023-11-19 04:52:30,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:52:30,065 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2023-11-19 04:52:30,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:52:30,066 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2023-11-19 04:52:30,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-19 04:52:30,066 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:52:30,066 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 04:52:30,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 04:52:30,067 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-19 04:52:30,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:52:30,067 INFO L85 PathProgramCache]: Analyzing trace with hash 699845550, now seen corresponding path program 1 times [2023-11-19 04:52:30,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:52:30,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288335341] [2023-11-19 04:52:30,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:52:30,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:52:30,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:52:30,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:52:30,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:52:30,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288335341] [2023-11-19 04:52:30,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288335341] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:52:30,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:52:30,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:52:30,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353547425] [2023-11-19 04:52:30,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:52:30,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:52:30,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:52:30,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:52:30,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:52:30,121 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:52:30,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:52:30,165 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2023-11-19 04:52:30,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:52:30,166 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-19 04:52:30,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:52:30,167 INFO L225 Difference]: With dead ends: 31 [2023-11-19 04:52:30,167 INFO L226 Difference]: Without dead ends: 31 [2023-11-19 04:52:30,168 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 [2023-11-19 04:52:30,170 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 49 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:52:30,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 18 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:52:30,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-19 04:52:30,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-11-19 04:52:30,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 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) [2023-11-19 04:52:30,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2023-11-19 04:52:30,187 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 6 [2023-11-19 04:52:30,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:52:30,187 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2023-11-19 04:52:30,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:52:30,188 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2023-11-19 04:52:30,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-19 04:52:30,188 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:52:30,188 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2023-11-19 04:52:30,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 04:52:30,189 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-19 04:52:30,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:52:30,190 INFO L85 PathProgramCache]: Analyzing trace with hash 697080176, now seen corresponding path program 1 times [2023-11-19 04:52:30,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:52:30,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548311735] [2023-11-19 04:52:30,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:52:30,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:52:30,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:52:30,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:52:30,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:52:30,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548311735] [2023-11-19 04:52:30,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548311735] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:52:30,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75911408] [2023-11-19 04:52:30,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:52:30,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:52:30,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:52:30,480 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:52:30,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:52:30,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:52:30,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 04:52:30,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:52:30,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-19 04:52:30,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-19 04:52:30,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:52:30,846 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:52:31,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:52:31,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75911408] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:52:31,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1421051238] [2023-11-19 04:52:31,039 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2023-11-19 04:52:31,039 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:52:31,043 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:52:31,049 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:52:31,049 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:52:32,205 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:52:32,817 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '697#(and (<= 2 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet17#1|)) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= |ULTIMATE.start_main_#t~nondet17#1| 127) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= (select |#length| |ULTIMATE.start_main_~nondetString2~0#1.base|) |ULTIMATE.start_main_~i~1#1|) (<= 2 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 2 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647))' at error location [2023-11-19 04:52:32,817 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:52:32,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:52:32,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2023-11-19 04:52:32,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636783706] [2023-11-19 04:52:32,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:52:32,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 04:52:32,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:52:32,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 04:52:32,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-11-19 04:52:32,820 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 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) [2023-11-19 04:52:33,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:52:33,142 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2023-11-19 04:52:33,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 04:52:33,143 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 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 [2023-11-19 04:52:33,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:52:33,143 INFO L225 Difference]: With dead ends: 32 [2023-11-19 04:52:33,143 INFO L226 Difference]: Without dead ends: 32 [2023-11-19 04:52:33,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2023-11-19 04:52:33,145 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 35 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:52:33,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 98 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:52:33,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-19 04:52:33,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2023-11-19 04:52:33,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.65) internal successors, (33), 27 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) [2023-11-19 04:52:33,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2023-11-19 04:52:33,147 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 6 [2023-11-19 04:52:33,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:52:33,148 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2023-11-19 04:52:33,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 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) [2023-11-19 04:52:33,148 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2023-11-19 04:52:33,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-19 04:52:33,149 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:52:33,149 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:52:33,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 04:52:33,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-19 04:52:33,368 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-19 04:52:33,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:52:33,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1327565677, now seen corresponding path program 1 times [2023-11-19 04:52:33,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:52:33,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011151036] [2023-11-19 04:52:33,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:52:33,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:52:33,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:52:33,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:52:33,571 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:52:33,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011151036] [2023-11-19 04:52:33,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011151036] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:52:33,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:52:33,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 04:52:33,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278288083] [2023-11-19 04:52:33,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:52:33,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:52:33,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:52:33,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:52:33,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:52:33,573 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 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) [2023-11-19 04:52:33,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:52:33,780 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2023-11-19 04:52:33,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 04:52:33,780 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-19 04:52:33,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:52:33,782 INFO L225 Difference]: With dead ends: 59 [2023-11-19 04:52:33,782 INFO L226 Difference]: Without dead ends: 59 [2023-11-19 04:52:33,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-11-19 04:52:33,783 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 126 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:52:33,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 45 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:52:33,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-19 04:52:33,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 27. [2023-11-19 04:52:33,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 26 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) [2023-11-19 04:52:33,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2023-11-19 04:52:33,793 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 9 [2023-11-19 04:52:33,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:52:33,793 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2023-11-19 04:52:33,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 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) [2023-11-19 04:52:33,793 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2023-11-19 04:52:33,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-19 04:52:33,794 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:52:33,794 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:52:33,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 04:52:33,795 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-19 04:52:33,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:52:33,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1327565676, now seen corresponding path program 1 times [2023-11-19 04:52:33,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:52:33,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650870771] [2023-11-19 04:52:33,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:52:33,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:52:33,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:52:33,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:52:33,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:52:33,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650870771] [2023-11-19 04:52:33,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650870771] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:52:33,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:52:33,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:52:33,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118864549] [2023-11-19 04:52:33,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:52:33,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:52:33,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:52:33,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:52:33,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:52:33,893 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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) [2023-11-19 04:52:33,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:52:33,952 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2023-11-19 04:52:33,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:52:33,952 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-19 04:52:33,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:52:33,953 INFO L225 Difference]: With dead ends: 27 [2023-11-19 04:52:33,953 INFO L226 Difference]: Without dead ends: 27 [2023-11-19 04:52:33,954 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 [2023-11-19 04:52:33,955 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 28 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:52:33,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 19 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:52:33,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-19 04:52:33,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2023-11-19 04:52:33,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.380952380952381) 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) [2023-11-19 04:52:33,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2023-11-19 04:52:33,961 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 9 [2023-11-19 04:52:33,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:52:33,961 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2023-11-19 04:52:33,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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) [2023-11-19 04:52:33,961 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2023-11-19 04:52:33,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 04:52:33,962 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:52:33,963 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:52:33,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 04:52:33,963 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-19 04:52:33,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:52:33,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1795204963, now seen corresponding path program 1 times [2023-11-19 04:52:33,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:52:33,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955480215] [2023-11-19 04:52:33,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:52:33,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:52:33,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:52:34,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:52:34,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:52:34,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955480215] [2023-11-19 04:52:34,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955480215] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:52:34,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:52:34,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:52:34,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027436982] [2023-11-19 04:52:34,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:52:34,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:52:34,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:52:34,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:52:34,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:52:34,175 INFO L87 Difference]: Start difference. First operand 24 states and 29 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) [2023-11-19 04:52:34,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:52:34,214 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2023-11-19 04:52:34,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:52:34,214 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 [2023-11-19 04:52:34,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:52:34,215 INFO L225 Difference]: With dead ends: 23 [2023-11-19 04:52:34,215 INFO L226 Difference]: Without dead ends: 20 [2023-11-19 04:52:34,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:52:34,233 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 38 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:52:34,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 24 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:52:34,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-19 04:52:34,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-19 04:52:34,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 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) [2023-11-19 04:52:34,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-11-19 04:52:34,238 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 10 [2023-11-19 04:52:34,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:52:34,238 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-11-19 04:52:34,239 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) [2023-11-19 04:52:34,239 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-11-19 04:52:34,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-19 04:52:34,240 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:52:34,240 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:52:34,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 04:52:34,240 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-19 04:52:34,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:52:34,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1451652080, now seen corresponding path program 1 times [2023-11-19 04:52:34,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:52:34,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311443038] [2023-11-19 04:52:34,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:52:34,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:52:34,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:52:34,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:52:34,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:52:34,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311443038] [2023-11-19 04:52:34,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311443038] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:52:34,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:52:34,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:52:34,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592854658] [2023-11-19 04:52:34,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:52:34,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:52:34,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:52:34,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:52:34,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:52:34,271 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 3 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) [2023-11-19 04:52:34,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:52:34,294 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2023-11-19 04:52:34,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:52:34,295 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-19 04:52:34,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:52:34,295 INFO L225 Difference]: With dead ends: 21 [2023-11-19 04:52:34,295 INFO L226 Difference]: Without dead ends: 21 [2023-11-19 04:52:34,296 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 [2023-11-19 04:52:34,296 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:52:34,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:52:34,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-19 04:52:34,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-19 04:52:34,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 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) [2023-11-19 04:52:34,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-11-19 04:52:34,299 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 12 [2023-11-19 04:52:34,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:52:34,300 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-11-19 04:52:34,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2023-11-19 04:52:34,300 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-11-19 04:52:34,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-19 04:52:34,301 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:52:34,301 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:52:34,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-19 04:52:34,302 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-19 04:52:34,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:52:34,302 INFO L85 PathProgramCache]: Analyzing trace with hash 2051394102, now seen corresponding path program 1 times [2023-11-19 04:52:34,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:52:34,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057150482] [2023-11-19 04:52:34,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:52:34,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:52:34,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:52:34,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:52:34,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:52:34,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057150482] [2023-11-19 04:52:34,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057150482] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:52:34,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:52:34,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 04:52:34,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901713711] [2023-11-19 04:52:34,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:52:34,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:52:34,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:52:34,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:52:34,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:52:34,613 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 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) [2023-11-19 04:52:34,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:52:34,765 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2023-11-19 04:52:34,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 04:52:34,766 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 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 13 [2023-11-19 04:52:34,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:52:34,766 INFO L225 Difference]: With dead ends: 29 [2023-11-19 04:52:34,767 INFO L226 Difference]: Without dead ends: 23 [2023-11-19 04:52:34,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-19 04:52:34,768 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 8 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:52:34,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 52 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:52:34,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-19 04:52:34,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2023-11-19 04:52:34,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:52:34,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-11-19 04:52:34,772 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 13 [2023-11-19 04:52:34,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:52:34,772 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-11-19 04:52:34,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 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) [2023-11-19 04:52:34,772 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-11-19 04:52:34,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 04:52:34,773 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:52:34,773 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:52:34,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-19 04:52:34,773 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-19 04:52:34,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:52:34,774 INFO L85 PathProgramCache]: Analyzing trace with hash 745435777, now seen corresponding path program 1 times [2023-11-19 04:52:34,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:52:34,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518818618] [2023-11-19 04:52:34,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:52:34,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:52:34,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:52:35,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:52:35,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:52:35,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518818618] [2023-11-19 04:52:35,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518818618] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:52:35,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:52:35,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 04:52:35,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646398575] [2023-11-19 04:52:35,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:52:35,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 04:52:35,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:52:35,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 04:52:35,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:52:35,035 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 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) [2023-11-19 04:52:35,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:52:35,177 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2023-11-19 04:52:35,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 04:52:35,178 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 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 15 [2023-11-19 04:52:35,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:52:35,179 INFO L225 Difference]: With dead ends: 37 [2023-11-19 04:52:35,179 INFO L226 Difference]: Without dead ends: 37 [2023-11-19 04:52:35,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-19 04:52:35,181 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 57 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:52:35,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 36 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:52:35,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-19 04:52:35,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2023-11-19 04:52:35,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 32 states have (on average 1.25) internal successors, (40), 33 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) [2023-11-19 04:52:35,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2023-11-19 04:52:35,184 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 15 [2023-11-19 04:52:35,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:52:35,185 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2023-11-19 04:52:35,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 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) [2023-11-19 04:52:35,185 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2023-11-19 04:52:35,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 04:52:35,187 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:52:35,187 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:52:35,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-19 04:52:35,187 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-19 04:52:35,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:52:35,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1638206173, now seen corresponding path program 1 times [2023-11-19 04:52:35,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:52:35,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651413558] [2023-11-19 04:52:35,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:52:35,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:52:35,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:52:35,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:52:35,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:52:35,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651413558] [2023-11-19 04:52:35,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651413558] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:52:35,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867331859] [2023-11-19 04:52:35,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:52:35,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:52:35,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:52:35,424 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:52:35,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:52:35,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:52:35,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-19 04:52:35,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:52:35,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:52:35,658 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:52:35,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-19 04:52:35,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:52:35,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867331859] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:52:35,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [438212469] [2023-11-19 04:52:35,809 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-19 04:52:35,809 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:52:35,810 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:52:35,810 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:52:35,810 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:52:38,927 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:52:43,268 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1276#(and (not (= |ULTIMATE.start_cstrcspn_~c~0#1| 0)) (<= 2 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~s~0#1.base|) 0) 0) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= |ULTIMATE.start_main_~length2~0#1| 1) (<= 1 (select |#length| |ULTIMATE.start_cstrcspn_~s~0#1.base|)) (<= 2 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (= (select |#valid| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) 1) (<= 2 |ULTIMATE.start_cstrcspn_~s1#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (= |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|)) (= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (= |ULTIMATE.start_cstrcspn_~s~0#1.offset| 0) (= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 2 |ULTIMATE.start_main_~nondetString1~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ (- 1) |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|)) |ULTIMATE.start_cstrcspn_~c~0#1|) (= |ULTIMATE.start_cstrcspn_~s2#1.base| |ULTIMATE.start_cstrcspn_~s~0#1.base|) (<= 1 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (= (select |#valid| |ULTIMATE.start_cstrcspn_~s~0#1.base|) 1))' at error location [2023-11-19 04:52:43,269 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:52:43,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:52:43,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2023-11-19 04:52:43,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339601398] [2023-11-19 04:52:43,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:52:43,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 04:52:43,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:52:43,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 04:52:43,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2023-11-19 04:52:43,272 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 17 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:52:43,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:52:43,480 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2023-11-19 04:52:43,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 04:52:43,488 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-19 04:52:43,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:52:43,490 INFO L225 Difference]: With dead ends: 73 [2023-11-19 04:52:43,490 INFO L226 Difference]: Without dead ends: 73 [2023-11-19 04:52:43,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2023-11-19 04:52:43,493 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 153 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:52:43,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 54 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:52:43,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-19 04:52:43,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2023-11-19 04:52:43,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 52 states have internal predecessors, (62), 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) [2023-11-19 04:52:43,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2023-11-19 04:52:43,497 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 16 [2023-11-19 04:52:43,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:52:43,498 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2023-11-19 04:52:43,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:52:43,498 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2023-11-19 04:52:43,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-19 04:52:43,500 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:52:43,500 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:52:43,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:52:43,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-19 04:52:43,721 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-19 04:52:43,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:52:43,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1638425424, now seen corresponding path program 1 times [2023-11-19 04:52:43,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:52:43,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207607285] [2023-11-19 04:52:43,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:52:43,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:52:43,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:52:44,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:52:44,075 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:52:44,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207607285] [2023-11-19 04:52:44,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207607285] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:52:44,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257517272] [2023-11-19 04:52:44,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:52:44,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:52:44,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:52:44,077 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:52:44,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:52:44,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:52:44,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-19 04:52:44,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:52:44,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:52:44,259 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:52:44,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-19 04:52:44,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:52:44,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257517272] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:52:44,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [264023180] [2023-11-19 04:52:44,395 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-19 04:52:44,395 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:52:44,395 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:52:44,395 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:52:44,396 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:52:45,502 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:52:47,273 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1540#(and (<= 2 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~s1#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= (select |#length| |ULTIMATE.start_cstrcspn_~s~0#1.base|) |ULTIMATE.start_cstrcspn_~s~0#1.offset|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 2 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~s~0#1.base|) (= |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 0))' at error location [2023-11-19 04:52:47,273 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:52:47,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:52:47,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-19 04:52:47,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728465911] [2023-11-19 04:52:47,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:52:47,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 04:52:47,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:52:47,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 04:52:47,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=873, Unknown=1, NotChecked=0, Total=992 [2023-11-19 04:52:47,276 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:52:47,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:52:47,636 INFO L93 Difference]: Finished difference Result 89 states and 105 transitions. [2023-11-19 04:52:47,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 04:52:47,637 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-19 04:52:47,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:52:47,638 INFO L225 Difference]: With dead ends: 89 [2023-11-19 04:52:47,638 INFO L226 Difference]: Without dead ends: 89 [2023-11-19 04:52:47,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=178, Invalid=1227, Unknown=1, NotChecked=0, Total=1406 [2023-11-19 04:52:47,640 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 168 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:52:47,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 64 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:52:47,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-19 04:52:47,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 61. [2023-11-19 04:52:47,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 60 states have internal predecessors, (74), 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) [2023-11-19 04:52:47,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2023-11-19 04:52:47,643 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 17 [2023-11-19 04:52:47,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:52:47,643 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2023-11-19 04:52:47,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:52:47,643 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2023-11-19 04:52:47,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-19 04:52:47,644 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:52:47,644 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:52:47,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-19 04:52:47,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-19 04:52:47,848 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-19 04:52:47,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:52:47,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1031537145, now seen corresponding path program 2 times [2023-11-19 04:52:47,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:52:47,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896319718] [2023-11-19 04:52:47,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:52:47,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:52:47,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:52:48,365 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:52:48,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:52:48,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896319718] [2023-11-19 04:52:48,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896319718] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:52:48,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585396992] [2023-11-19 04:52:48,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 04:52:48,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:52:48,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:52:48,367 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:52:48,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 04:52:48,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 04:52:48,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:52:48,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-19 04:52:48,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:52:48,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-19 04:52:48,651 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:52:48,652 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:52:48,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-19 04:52:48,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-19 04:52:48,742 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:52:48,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585396992] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:52:48,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1686151332] [2023-11-19 04:52:48,748 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-19 04:52:48,748 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:52:48,749 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:52:48,749 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:52:48,749 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:52:49,816 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:52:51,540 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1855#(and (<= 2 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~s1#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s~0#1.offset|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= (select |#length| |ULTIMATE.start_cstrcspn_~s~0#1.base|) |ULTIMATE.start_cstrcspn_~s~0#1.offset|) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 2 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_~s~0#1.base|) (= |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 0))' at error location [2023-11-19 04:52:51,540 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:52:51,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:52:51,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2023-11-19 04:52:51,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85785219] [2023-11-19 04:52:51,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:52:51,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-19 04:52:51,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:52:51,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 04:52:51,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2023-11-19 04:52:51,543 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 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) [2023-11-19 04:52:51,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:52:51,886 INFO L93 Difference]: Finished difference Result 102 states and 120 transitions. [2023-11-19 04:52:51,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 04:52:51,886 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 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) Word has length 21 [2023-11-19 04:52:51,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:52:51,887 INFO L225 Difference]: With dead ends: 102 [2023-11-19 04:52:51,887 INFO L226 Difference]: Without dead ends: 102 [2023-11-19 04:52:51,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=232, Invalid=1490, Unknown=0, NotChecked=0, Total=1722 [2023-11-19 04:52:51,889 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 92 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:52:51,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 101 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:52:51,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-11-19 04:52:51,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 90. [2023-11-19 04:52:51,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 88 states have (on average 1.2386363636363635) internal successors, (109), 89 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:52:51,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 109 transitions. [2023-11-19 04:52:51,894 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 109 transitions. Word has length 21 [2023-11-19 04:52:51,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:52:51,894 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 109 transitions. [2023-11-19 04:52:51,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 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) [2023-11-19 04:52:51,895 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 109 transitions. [2023-11-19 04:52:51,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-19 04:52:51,896 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:52:51,896 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:52:51,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-19 04:52:52,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-19 04:52:52,112 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-19 04:52:52,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:52:52,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1487047912, now seen corresponding path program 3 times [2023-11-19 04:52:52,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:52:52,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837775749] [2023-11-19 04:52:52,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:52:52,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:52:52,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:52:52,517 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:52:52,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:52:52,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837775749] [2023-11-19 04:52:52,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837775749] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:52:52,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468454312] [2023-11-19 04:52:52,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 04:52:52,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:52:52,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:52:52,519 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:52:52,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 04:52:52,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 04:52:52,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:52:52,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-19 04:52:52,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:52:52,754 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:52:52,755 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:52:52,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-19 04:52:52,952 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:52:52,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468454312] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:52:52,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1832557110] [2023-11-19 04:52:52,955 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-19 04:52:52,955 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:52:52,955 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:52:52,956 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:52:52,956 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:52:54,151 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:52:55,674 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2232#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (or (< (select |#length| |ULTIMATE.start_cstrcspn_~s~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~s~0#1.offset| 1)) (< |ULTIMATE.start_cstrcspn_~s~0#1.offset| 0)) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|))' at error location [2023-11-19 04:52:55,674 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:52:55,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:52:55,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2023-11-19 04:52:55,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592639784] [2023-11-19 04:52:55,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:52:55,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-19 04:52:55,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:52:55,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-19 04:52:55,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1066, Unknown=0, NotChecked=0, Total=1190 [2023-11-19 04:52:55,677 INFO L87 Difference]: Start difference. First operand 90 states and 109 transitions. Second operand has 21 states, 20 states have (on average 2.7) internal successors, (54), 21 states have internal predecessors, (54), 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) [2023-11-19 04:52:56,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:52:56,202 INFO L93 Difference]: Finished difference Result 135 states and 161 transitions. [2023-11-19 04:52:56,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 04:52:56,203 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.7) internal successors, (54), 21 states have internal predecessors, (54), 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 23 [2023-11-19 04:52:56,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:52:56,205 INFO L225 Difference]: With dead ends: 135 [2023-11-19 04:52:56,205 INFO L226 Difference]: Without dead ends: 135 [2023-11-19 04:52:56,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=200, Invalid=1522, Unknown=0, NotChecked=0, Total=1722 [2023-11-19 04:52:56,207 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 172 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:52:56,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 98 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:52:56,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-19 04:52:56,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 98. [2023-11-19 04:52:56,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 96 states have (on average 1.2604166666666667) internal successors, (121), 97 states have internal predecessors, (121), 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) [2023-11-19 04:52:56,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2023-11-19 04:52:56,213 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 23 [2023-11-19 04:52:56,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:52:56,213 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2023-11-19 04:52:56,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.7) internal successors, (54), 21 states have internal predecessors, (54), 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) [2023-11-19 04:52:56,214 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2023-11-19 04:52:56,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-19 04:52:56,215 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:52:56,215 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:52:56,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 04:52:56,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:52:56,428 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-19 04:52:56,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:52:56,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1270621450, now seen corresponding path program 2 times [2023-11-19 04:52:56,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:52:56,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610762873] [2023-11-19 04:52:56,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:52:56,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:52:56,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:52:56,803 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:52:56,803 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:52:56,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610762873] [2023-11-19 04:52:56,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610762873] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:52:56,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760179152] [2023-11-19 04:52:56,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 04:52:56,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:52:56,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:52:56,805 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:52:56,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 04:52:56,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 04:52:56,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:52:56,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-19 04:52:56,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:52:56,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-19 04:52:56,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-19 04:52:57,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-19 04:52:57,203 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:52:57,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:52:57,426 WARN L854 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_cstrcspn_~s~0#1.offset| Int) (v_ArrVal_228 (Array Int Int)) (|ULTIMATE.start_cstrcspn_~s~0#1.base| Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_228))) (or (not (= 0 (select (select .cse0 |ULTIMATE.start_cstrcspn_~s~0#1.base|) |ULTIMATE.start_cstrcspn_~s~0#1.offset|))) (= (select (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)))) is different from false [2023-11-19 04:52:57,436 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 04:52:57,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 35 [2023-11-19 04:52:57,476 INFO L349 Elim1Store]: treesize reduction 4, result has 89.2 percent of original size [2023-11-19 04:52:57,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 76 [2023-11-19 04:52:57,491 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 04:52:57,492 INFO L378 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 32 treesize of output 36 [2023-11-19 04:52:57,612 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:52:57,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760179152] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:52:57,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [638186810] [2023-11-19 04:52:57,615 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-19 04:52:57,615 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:52:57,615 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:52:57,615 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:52:57,615 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:52:59,869 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:53:04,170 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2661#(and (not (= |ULTIMATE.start_cstrcspn_~c~0#1| 0)) (<= 2 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~s~0#1.base|) 0) 0) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= |ULTIMATE.start_main_~length2~0#1| 1) (<= 1 (select |#length| |ULTIMATE.start_cstrcspn_~s~0#1.base|)) (<= 2 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (= (select |#valid| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) 1) (<= 2 |ULTIMATE.start_cstrcspn_~s1#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (= |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|)) (= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (= |ULTIMATE.start_cstrcspn_~s~0#1.offset| 0) (= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 2 |ULTIMATE.start_main_~nondetString1~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ (- 1) |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|)) |ULTIMATE.start_cstrcspn_~c~0#1|) (= |ULTIMATE.start_cstrcspn_~s2#1.base| |ULTIMATE.start_cstrcspn_~s~0#1.base|) (<= 1 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (= (select |#valid| |ULTIMATE.start_cstrcspn_~s~0#1.base|) 1))' at error location [2023-11-19 04:53:04,170 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:53:04,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:53:04,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 29 [2023-11-19 04:53:04,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645018864] [2023-11-19 04:53:04,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:53:04,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-19 04:53:04,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:53:04,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-19 04:53:04,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1652, Unknown=1, NotChecked=82, Total=1892 [2023-11-19 04:53:04,173 INFO L87 Difference]: Start difference. First operand 98 states and 121 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 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) [2023-11-19 04:53:04,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:53:04,551 INFO L93 Difference]: Finished difference Result 158 states and 190 transitions. [2023-11-19 04:53:04,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 04:53:04,551 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 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 24 [2023-11-19 04:53:04,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:53:04,552 INFO L225 Difference]: With dead ends: 158 [2023-11-19 04:53:04,553 INFO L226 Difference]: Without dead ends: 125 [2023-11-19 04:53:04,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=228, Invalid=2127, Unknown=1, NotChecked=94, Total=2450 [2023-11-19 04:53:04,554 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 84 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:53:04,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 134 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 273 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2023-11-19 04:53:04,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-11-19 04:53:04,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2023-11-19 04:53:04,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 121 states have (on average 1.2314049586776858) internal successors, (149), 122 states have internal predecessors, (149), 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) [2023-11-19 04:53:04,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 149 transitions. [2023-11-19 04:53:04,559 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 149 transitions. Word has length 24 [2023-11-19 04:53:04,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:53:04,559 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 149 transitions. [2023-11-19 04:53:04,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 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) [2023-11-19 04:53:04,559 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 149 transitions. [2023-11-19 04:53:04,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-19 04:53:04,560 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:53:04,560 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-19 04:53:04,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 04:53:04,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:53:04,761 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-19 04:53:04,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:53:04,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1856873931, now seen corresponding path program 3 times [2023-11-19 04:53:04,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:53:04,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886178317] [2023-11-19 04:53:04,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:53:04,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:53:04,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:53:05,065 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:53:05,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:53:05,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886178317] [2023-11-19 04:53:05,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886178317] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:53:05,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810813664] [2023-11-19 04:53:05,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 04:53:05,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:53:05,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:53:05,067 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:53:05,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 04:53:05,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 04:53:05,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:53:05,176 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-19 04:53:05,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:53:05,311 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:53:05,312 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:53:05,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-19 04:53:05,496 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:53:05,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810813664] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:53:05,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [282195209] [2023-11-19 04:53:05,499 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-19 04:53:05,499 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:53:05,499 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:53:05,500 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:53:05,500 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:53:07,839 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:53:11,868 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3137#(and (not (= |ULTIMATE.start_cstrcspn_~c~0#1| 0)) (<= 2 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 2 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~s~0#1.base|) 0) 0) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= |ULTIMATE.start_main_~length2~0#1| 1) (<= 1 (select |#length| |ULTIMATE.start_cstrcspn_~s~0#1.base|)) (<= 2 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (= (select |#valid| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) 1) (<= 2 |ULTIMATE.start_cstrcspn_~s1#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (= |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|)) (= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (= |ULTIMATE.start_cstrcspn_~s~0#1.offset| 0) (= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 2 |ULTIMATE.start_cstrcspn_~s2#1.base|) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 2 |ULTIMATE.start_main_~nondetString1~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ (- 1) |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|)) |ULTIMATE.start_cstrcspn_~c~0#1|) (= |ULTIMATE.start_cstrcspn_~s2#1.base| |ULTIMATE.start_cstrcspn_~s~0#1.base|) (<= 1 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (= (select |#valid| |ULTIMATE.start_cstrcspn_~s~0#1.base|) 1))' at error location [2023-11-19 04:53:11,868 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:53:11,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:53:11,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-11-19 04:53:11,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137730477] [2023-11-19 04:53:11,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:53:11,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-19 04:53:11,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:53:11,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 04:53:11,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2023-11-19 04:53:11,871 INFO L87 Difference]: Start difference. First operand 123 states and 149 transitions. Second operand has 19 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 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) [2023-11-19 04:53:12,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:53:12,185 INFO L93 Difference]: Finished difference Result 202 states and 242 transitions. [2023-11-19 04:53:12,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 04:53:12,185 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 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 [2023-11-19 04:53:12,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:53:12,187 INFO L225 Difference]: With dead ends: 202 [2023-11-19 04:53:12,187 INFO L226 Difference]: Without dead ends: 202 [2023-11-19 04:53:12,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=187, Invalid=1295, Unknown=0, NotChecked=0, Total=1482 [2023-11-19 04:53:12,189 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 146 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:53:12,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 128 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:53:12,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2023-11-19 04:53:12,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 162. [2023-11-19 04:53:12,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 160 states have (on average 1.23125) internal successors, (197), 161 states have internal predecessors, (197), 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) [2023-11-19 04:53:12,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 197 transitions. [2023-11-19 04:53:12,195 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 197 transitions. Word has length 26 [2023-11-19 04:53:12,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:53:12,196 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 197 transitions. [2023-11-19 04:53:12,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 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) [2023-11-19 04:53:12,196 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 197 transitions. [2023-11-19 04:53:12,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-19 04:53:12,197 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:53:12,197 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:53:12,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-19 04:53:12,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeb895cd-f34e-4037-80bb-0d22763e64ca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-19 04:53:12,419 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-19 04:53:12,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:53:12,419 INFO L85 PathProgramCache]: Analyzing trace with hash -68938191, now seen corresponding path program 4 times [2023-11-19 04:53:12,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:53:12,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254284112] [2023-11-19 04:53:12,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:53:12,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:53:12,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat