./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-15/cstrncpy_reverse_alloca.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8e5a46-fabc-401c-a761-fcff4c824116/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8e5a46-fabc-401c-a761-fcff4c824116/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8e5a46-fabc-401c-a761-fcff4c824116/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8e5a46-fabc-401c-a761-fcff4c824116/bin/utaipan-verify-SwPr7d2a91/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-15/cstrncpy_reverse_alloca.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8e5a46-fabc-401c-a761-fcff4c824116/bin/utaipan-verify-SwPr7d2a91/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8e5a46-fabc-401c-a761-fcff4c824116/bin/utaipan-verify-SwPr7d2a91 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 3c4d1f74b81dbb287c4425592070f3cc0de08845db85b6da85a8a6e68f14746e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:48:48,424 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:48:48,536 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8e5a46-fabc-401c-a761-fcff4c824116/bin/utaipan-verify-SwPr7d2a91/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2023-11-24 23:48:48,544 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:48:48,545 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:48:48,591 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:48:48,592 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:48:48,592 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:48:48,593 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:48:48,598 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:48:48,599 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:48:48,600 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:48:48,600 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:48:48,602 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:48:48,602 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:48:48,603 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:48:48,603 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:48:48,604 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:48:48,604 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:48:48,605 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:48:48,605 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:48:48,606 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:48:48,606 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 23:48:48,607 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 23:48:48,608 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:48:48,608 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:48:48,609 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:48:48,609 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 23:48:48,609 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 23:48:48,610 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 23:48:48,612 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:48:48,612 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 23:48:48,612 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 23:48:48,613 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:48:48,613 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:48:48,613 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:48:48,613 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:48:48,614 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:48:48,614 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:48:48,614 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:48:48,614 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:48:48,615 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:48:48,615 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:48:48,615 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:48:48,616 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:48:48,616 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_fa8e5a46-fabc-401c-a761-fcff4c824116/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8e5a46-fabc-401c-a761-fcff4c824116/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3c4d1f74b81dbb287c4425592070f3cc0de08845db85b6da85a8a6e68f14746e [2023-11-24 23:48:48,938 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:48:48,966 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:48:48,969 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:48:48,970 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:48:48,971 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:48:48,973 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8e5a46-fabc-401c-a761-fcff4c824116/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/termination-15/cstrncpy_reverse_alloca.i [2023-11-24 23:48:52,005 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:48:52,382 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:48:52,383 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8e5a46-fabc-401c-a761-fcff4c824116/sv-benchmarks/c/termination-15/cstrncpy_reverse_alloca.i [2023-11-24 23:48:52,396 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8e5a46-fabc-401c-a761-fcff4c824116/bin/utaipan-verify-SwPr7d2a91/data/1e7ba49ee/be396ababe8447ac9e3b41bf17b4f5cc/FLAGee4a30a20 [2023-11-24 23:48:52,411 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8e5a46-fabc-401c-a761-fcff4c824116/bin/utaipan-verify-SwPr7d2a91/data/1e7ba49ee/be396ababe8447ac9e3b41bf17b4f5cc [2023-11-24 23:48:52,414 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:48:52,415 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:48:52,419 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:48:52,419 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:48:52,424 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:48:52,425 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:48:52" (1/1) ... [2023-11-24 23:48:52,426 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a619a30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:48:52, skipping insertion in model container [2023-11-24 23:48:52,426 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:48:52" (1/1) ... [2023-11-24 23:48:52,485 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:48:52,914 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:48:52,926 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:48:53,006 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:48:53,058 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:48:53,059 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:48:53 WrapperNode [2023-11-24 23:48:53,059 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:48:53,060 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:48:53,061 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:48:53,061 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:48:53,069 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:48:53" (1/1) ... [2023-11-24 23:48:53,095 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:48:53" (1/1) ... [2023-11-24 23:48:53,128 INFO L138 Inliner]: procedures = 152, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 79 [2023-11-24 23:48:53,129 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:48:53,130 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:48:53,130 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:48:53,130 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:48:53,140 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:48:53" (1/1) ... [2023-11-24 23:48:53,141 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:48:53" (1/1) ... [2023-11-24 23:48:53,148 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:48:53" (1/1) ... [2023-11-24 23:48:53,149 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:48:53" (1/1) ... [2023-11-24 23:48:53,154 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:48:53" (1/1) ... [2023-11-24 23:48:53,158 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:48:53" (1/1) ... [2023-11-24 23:48:53,172 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:48:53" (1/1) ... [2023-11-24 23:48:53,174 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:48:53" (1/1) ... [2023-11-24 23:48:53,186 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:48:53,187 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:48:53,187 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:48:53,187 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:48:53,188 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:48:53" (1/1) ... [2023-11-24 23:48:53,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:48:53,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8e5a46-fabc-401c-a761-fcff4c824116/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:48:53,242 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8e5a46-fabc-401c-a761-fcff4c824116/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:48:53,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8e5a46-fabc-401c-a761-fcff4c824116/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:48:53,279 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-24 23:48:53,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-24 23:48:53,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 23:48:53,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 23:48:53,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:48:53,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:48:53,363 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:48:53,366 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:48:53,567 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:48:53,669 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:48:53,669 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-24 23:48:53,671 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:48:53 BoogieIcfgContainer [2023-11-24 23:48:53,671 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:48:53,674 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:48:53,674 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:48:53,678 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:48:53,678 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:48:52" (1/3) ... [2023-11-24 23:48:53,679 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19e34669 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:48:53, skipping insertion in model container [2023-11-24 23:48:53,679 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:48:53" (2/3) ... [2023-11-24 23:48:53,679 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19e34669 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:48:53, skipping insertion in model container [2023-11-24 23:48:53,680 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:48:53" (3/3) ... [2023-11-24 23:48:53,681 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrncpy_reverse_alloca.i [2023-11-24 23:48:53,702 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:48:53,702 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2023-11-24 23:48:53,749 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:48:53,756 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;@73c6d033, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:48:53,756 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-24 23:48:53,761 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:48:53,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-24 23:48:53,767 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:48:53,768 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-24 23:48:53,769 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 23:48:53,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:48:53,775 INFO L85 PathProgramCache]: Analyzing trace with hash 3334, now seen corresponding path program 1 times [2023-11-24 23:48:53,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:48:53,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707140924] [2023-11-24 23:48:53,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:48:53,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:48:53,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:48:54,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:48:54,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:48:54,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707140924] [2023-11-24 23:48:54,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707140924] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:48:54,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:48:54,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 23:48:54,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114870910] [2023-11-24 23:48:54,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:48:54,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:48:54,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:48:54,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:48:54,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:48:54,102 INFO L87 Difference]: Start difference. First operand has 21 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:48:54,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:48:54,148 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2023-11-24 23:48:54,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:48:54,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2023-11-24 23:48:54,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:48:54,159 INFO L225 Difference]: With dead ends: 20 [2023-11-24 23:48:54,160 INFO L226 Difference]: Without dead ends: 19 [2023-11-24 23:48:54,161 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 [2023-11-24 23:48:54,165 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 17 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:48:54,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 10 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:48:54,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-24 23:48:54,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-24 23:48:54,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:48:54,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2023-11-24 23:48:54,223 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 2 [2023-11-24 23:48:54,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:48:54,224 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2023-11-24 23:48:54,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:48:54,224 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2023-11-24 23:48:54,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-24 23:48:54,225 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:48:54,225 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-24 23:48:54,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:48:54,226 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 23:48:54,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:48:54,226 INFO L85 PathProgramCache]: Analyzing trace with hash 3335, now seen corresponding path program 1 times [2023-11-24 23:48:54,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:48:54,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608878831] [2023-11-24 23:48:54,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:48:54,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:48:54,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:48:54,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:48:54,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:48:54,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608878831] [2023-11-24 23:48:54,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608878831] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:48:54,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:48:54,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 23:48:54,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375459077] [2023-11-24 23:48:54,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:48:54,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:48:54,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:48:54,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:48:54,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:48:54,550 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:48:54,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:48:54,599 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2023-11-24 23:48:54,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:48:54,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2023-11-24 23:48:54,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:48:54,601 INFO L225 Difference]: With dead ends: 18 [2023-11-24 23:48:54,601 INFO L226 Difference]: Without dead ends: 18 [2023-11-24 23:48:54,607 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 [2023-11-24 23:48:54,610 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:48:54,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:48:54,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-24 23:48:54,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-24 23:48:54,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:48:54,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2023-11-24 23:48:54,619 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 2 [2023-11-24 23:48:54,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:48:54,620 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2023-11-24 23:48:54,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:48:54,621 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2023-11-24 23:48:54,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-24 23:48:54,621 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:48:54,621 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-24 23:48:54,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 23:48:54,623 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 23:48:54,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:48:54,625 INFO L85 PathProgramCache]: Analyzing trace with hash 3256766, now seen corresponding path program 1 times [2023-11-24 23:48:54,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:48:54,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547734397] [2023-11-24 23:48:54,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:48:54,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:48:54,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:48:54,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:48:54,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:48:54,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547734397] [2023-11-24 23:48:54,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547734397] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:48:54,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:48:54,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:48:54,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965536765] [2023-11-24 23:48:54,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:48:54,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:48:54,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:48:54,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:48:54,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:48:54,799 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) 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) [2023-11-24 23:48:54,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:48:54,865 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2023-11-24 23:48:54,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:48:54,866 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) 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 [2023-11-24 23:48:54,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:48:54,867 INFO L225 Difference]: With dead ends: 17 [2023-11-24 23:48:54,867 INFO L226 Difference]: Without dead ends: 17 [2023-11-24 23:48:54,868 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 [2023-11-24 23:48:54,869 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 19 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:48:54,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 12 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:48:54,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-24 23:48:54,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-24 23:48:54,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:48:54,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2023-11-24 23:48:54,874 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 4 [2023-11-24 23:48:54,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:48:54,875 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2023-11-24 23:48:54,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) 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) [2023-11-24 23:48:54,875 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2023-11-24 23:48:54,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-24 23:48:54,876 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:48:54,876 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-24 23:48:54,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 23:48:54,876 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 23:48:54,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:48:54,877 INFO L85 PathProgramCache]: Analyzing trace with hash 3256767, now seen corresponding path program 1 times [2023-11-24 23:48:54,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:48:54,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951220489] [2023-11-24 23:48:54,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:48:54,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:48:54,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:48:55,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:48:55,466 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:48:55,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951220489] [2023-11-24 23:48:55,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951220489] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:48:55,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:48:55,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:48:55,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623565036] [2023-11-24 23:48:55,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:48:55,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:48:55,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:48:55,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:48:55,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:48:55,470 INFO L87 Difference]: Start difference. First operand 17 states and 19 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) [2023-11-24 23:48:55,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:48:55,544 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2023-11-24 23:48:55,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:48:55,545 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 [2023-11-24 23:48:55,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:48:55,547 INFO L225 Difference]: With dead ends: 20 [2023-11-24 23:48:55,547 INFO L226 Difference]: Without dead ends: 20 [2023-11-24 23:48:55,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:48:55,555 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 5 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:48:55,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 31 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:48:55,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-24 23:48:55,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2023-11-24 23:48:55,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:48:55,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2023-11-24 23:48:55,560 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 4 [2023-11-24 23:48:55,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:48:55,561 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2023-11-24 23:48:55,561 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) [2023-11-24 23:48:55,561 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2023-11-24 23:48:55,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-24 23:48:55,562 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:48:55,562 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 23:48:55,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 23:48:55,562 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 23:48:55,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:48:55,563 INFO L85 PathProgramCache]: Analyzing trace with hash 100959748, now seen corresponding path program 1 times [2023-11-24 23:48:55,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:48:55,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026571874] [2023-11-24 23:48:55,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:48:55,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:48:55,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:48:55,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:48:55,733 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:48:55,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026571874] [2023-11-24 23:48:55,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026571874] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:48:55,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:48:55,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:48:55,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455613313] [2023-11-24 23:48:55,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:48:55,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:48:55,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:48:55,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:48:55,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:48:55,736 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 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) [2023-11-24 23:48:55,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:48:55,828 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2023-11-24 23:48:55,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:48:55,829 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 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 [2023-11-24 23:48:55,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:48:55,830 INFO L225 Difference]: With dead ends: 18 [2023-11-24 23:48:55,830 INFO L226 Difference]: Without dead ends: 18 [2023-11-24 23:48:55,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-24 23:48:55,832 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 30 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:48:55,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 14 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:48:55,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-24 23:48:55,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-24 23:48:55,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:48:55,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2023-11-24 23:48:55,836 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 5 [2023-11-24 23:48:55,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:48:55,836 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2023-11-24 23:48:55,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 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) [2023-11-24 23:48:55,837 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2023-11-24 23:48:55,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-24 23:48:55,837 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:48:55,837 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 23:48:55,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 23:48:55,838 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 23:48:55,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:48:55,839 INFO L85 PathProgramCache]: Analyzing trace with hash 100959749, now seen corresponding path program 1 times [2023-11-24 23:48:55,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:48:55,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132236178] [2023-11-24 23:48:55,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:48:55,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:48:55,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:48:56,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:48:56,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:48:56,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132236178] [2023-11-24 23:48:56,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132236178] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:48:56,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:48:56,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:48:56,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838889967] [2023-11-24 23:48:56,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:48:56,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:48:56,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:48:56,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:48:56,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:48:56,075 INFO L87 Difference]: Start difference. First operand 18 states and 21 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) [2023-11-24 23:48:56,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:48:56,128 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2023-11-24 23:48:56,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:48:56,129 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 [2023-11-24 23:48:56,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:48:56,134 INFO L225 Difference]: With dead ends: 20 [2023-11-24 23:48:56,134 INFO L226 Difference]: Without dead ends: 20 [2023-11-24 23:48:56,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:48:56,137 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:48:56,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 28 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:48:56,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-24 23:48:56,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2023-11-24 23:48:56,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:48:56,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2023-11-24 23:48:56,149 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 5 [2023-11-24 23:48:56,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:48:56,150 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2023-11-24 23:48:56,150 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) [2023-11-24 23:48:56,150 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2023-11-24 23:48:56,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-24 23:48:56,151 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:48:56,151 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 23:48:56,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 23:48:56,151 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 23:48:56,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:48:56,153 INFO L85 PathProgramCache]: Analyzing trace with hash 101008108, now seen corresponding path program 1 times [2023-11-24 23:48:56,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:48:56,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888493399] [2023-11-24 23:48:56,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:48:56,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:48:56,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:48:56,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:48:56,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:48:56,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888493399] [2023-11-24 23:48:56,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888493399] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:48:56,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:48:56,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:48:56,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467245111] [2023-11-24 23:48:56,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:48:56,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:48:56,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:48:56,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:48:56,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:48:56,222 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:48:56,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:48:56,243 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2023-11-24 23:48:56,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:48:56,243 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-24 23:48:56,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:48:56,244 INFO L225 Difference]: With dead ends: 19 [2023-11-24 23:48:56,244 INFO L226 Difference]: Without dead ends: 19 [2023-11-24 23:48:56,244 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 [2023-11-24 23:48:56,245 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:48:56,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 23 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:48:56,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-24 23:48:56,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-24 23:48:56,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.5) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:48:56,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2023-11-24 23:48:56,249 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 5 [2023-11-24 23:48:56,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:48:56,249 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2023-11-24 23:48:56,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:48:56,249 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2023-11-24 23:48:56,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-24 23:48:56,250 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:48:56,250 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-24 23:48:56,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 23:48:56,250 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 23:48:56,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:48:56,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1214770392, now seen corresponding path program 1 times [2023-11-24 23:48:56,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:48:56,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491489353] [2023-11-24 23:48:56,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:48:56,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:48:56,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:48:56,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:48:56,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:48:56,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491489353] [2023-11-24 23:48:56,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491489353] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:48:56,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732038544] [2023-11-24 23:48:56,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:48:56,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:48:56,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8e5a46-fabc-401c-a761-fcff4c824116/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:48:56,626 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8e5a46-fabc-401c-a761-fcff4c824116/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:48:56,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8e5a46-fabc-401c-a761-fcff4c824116/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:48:56,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:48:56,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-24 23:48:56,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:48:56,792 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 11 treesize of output 7 [2023-11-24 23:48:56,858 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:48:56,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2023-11-24 23:48:56,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:48:56,944 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:48:57,062 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:48:57,063 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 19 treesize of output 23 [2023-11-24 23:48:57,148 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 10 treesize of output 8 [2023-11-24 23:48:57,153 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 14 treesize of output 12 [2023-11-24 23:48:57,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:48:57,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732038544] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:48:57,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1828638259] [2023-11-24 23:48:57,188 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-24 23:48:57,188 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:48:57,193 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:48:57,199 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:48:57,200 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:49:02,166 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:49:03,134 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '383#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= 2 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 2 |ULTIMATE.start_main_~nondetArea~0#1.base|) (= |ULTIMATE.start_main_#t~malloc214#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc214#1.base|) (= (+ |ULTIMATE.start_cstrncpy_~src~0#1.offset| 1) |ULTIMATE.start_cstrncpy_#t~post207#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= 2 |ULTIMATE.start_main_#t~malloc213#1.base|) (= |ULTIMATE.start_main_#t~malloc213#1.offset| 0) (= |ULTIMATE.start_cstrncpy_#t~post206#1.offset| (+ |ULTIMATE.start_cstrncpy_~dst~0#1.offset| 1)) (= |ULTIMATE.start_cstrncpy_#t~post207#1.base| |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post207#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_~s2#1.base|) (or (< |ULTIMATE.start_cstrncpy_#t~post207#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post207#1.base|) (+ 1 |ULTIMATE.start_cstrncpy_#t~post207#1.offset|))) (= |ULTIMATE.start_cstrncpy_#t~post206#1.base| |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#in~s1#1.base|))' at error location [2023-11-24 23:49:03,134 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-24 23:49:03,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:49:03,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-11-24 23:49:03,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643812384] [2023-11-24 23:49:03,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:49:03,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-24 23:49:03,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:49:03,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-24 23:49:03,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2023-11-24 23:49:03,137 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:49:03,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:49:03,332 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2023-11-24 23:49:03,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 23:49:03,333 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-24 23:49:03,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:49:03,335 INFO L225 Difference]: With dead ends: 26 [2023-11-24 23:49:03,335 INFO L226 Difference]: Without dead ends: 26 [2023-11-24 23:49:03,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2023-11-24 23:49:03,336 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:49:03,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 48 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:49:03,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-24 23:49:03,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2023-11-24 23:49:03,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.5294117647058822) 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) [2023-11-24 23:49:03,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-11-24 23:49:03,340 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 8 [2023-11-24 23:49:03,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:49:03,341 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-11-24 23:49:03,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:49:03,341 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-11-24 23:49:03,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-24 23:49:03,341 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:49:03,341 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:49:03,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8e5a46-fabc-401c-a761-fcff4c824116/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 23:49:03,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8e5a46-fabc-401c-a761-fcff4c824116/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:49:03,542 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 23:49:03,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:49:03,543 INFO L85 PathProgramCache]: Analyzing trace with hash -997375542, now seen corresponding path program 1 times [2023-11-24 23:49:03,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:49:03,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707086607] [2023-11-24 23:49:03,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:03,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:49:03,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:49:03,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:49:03,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:49:03,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707086607] [2023-11-24 23:49:03,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707086607] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:49:03,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:49:03,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:49:03,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036920486] [2023-11-24 23:49:03,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:49:03,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:49:03,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:49:03,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:49:03,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:49:03,653 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 6 states, 5 states have (on average 1.8) 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) [2023-11-24 23:49:03,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:49:03,741 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2023-11-24 23:49:03,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 23:49:03,742 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) 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 [2023-11-24 23:49:03,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:49:03,744 INFO L225 Difference]: With dead ends: 22 [2023-11-24 23:49:03,745 INFO L226 Difference]: Without dead ends: 22 [2023-11-24 23:49:03,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-24 23:49:03,747 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:49:03,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 18 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:49:03,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-24 23:49:03,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2023-11-24 23:49:03,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.4705882352941178) 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) [2023-11-24 23:49:03,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-11-24 23:49:03,755 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 9 [2023-11-24 23:49:03,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:49:03,756 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-11-24 23:49:03,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) 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) [2023-11-24 23:49:03,756 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-11-24 23:49:03,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-24 23:49:03,757 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:49:03,757 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:49:03,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 23:49:03,757 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 23:49:03,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:49:03,759 INFO L85 PathProgramCache]: Analyzing trace with hash -997375541, now seen corresponding path program 1 times [2023-11-24 23:49:03,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:49:03,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157721505] [2023-11-24 23:49:03,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:03,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:49:03,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:49:04,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:49:04,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:49:04,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157721505] [2023-11-24 23:49:04,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157721505] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:49:04,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:49:04,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 23:49:04,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100721243] [2023-11-24 23:49:04,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:49:04,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 23:49:04,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:49:04,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 23:49:04,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-24 23:49:04,102 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 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) [2023-11-24 23:49:04,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:49:04,300 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2023-11-24 23:49:04,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 23:49:04,301 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 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 [2023-11-24 23:49:04,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:49:04,301 INFO L225 Difference]: With dead ends: 23 [2023-11-24 23:49:04,302 INFO L226 Difference]: Without dead ends: 23 [2023-11-24 23:49:04,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-11-24 23:49:04,303 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 28 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:49:04,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 15 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:49:04,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-24 23:49:04,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-24 23:49:04,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 20 states have (on average 1.4) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:49:04,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2023-11-24 23:49:04,310 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 9 [2023-11-24 23:49:04,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:49:04,311 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2023-11-24 23:49:04,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 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) [2023-11-24 23:49:04,311 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2023-11-24 23:49:04,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-24 23:49:04,312 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:49:04,312 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:49:04,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 23:49:04,312 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 23:49:04,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:49:04,313 INFO L85 PathProgramCache]: Analyzing trace with hash -996775181, now seen corresponding path program 1 times [2023-11-24 23:49:04,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:49:04,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149351396] [2023-11-24 23:49:04,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:04,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:49:04,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:49:04,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 23:49:04,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:49:04,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149351396] [2023-11-24 23:49:04,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149351396] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:49:04,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:49:04,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:49:04,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244871138] [2023-11-24 23:49:04,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:49:04,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:49:04,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:49:04,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:49:04,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:49:04,471 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2023-11-24 23:49:04,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:49:04,492 INFO L93 Difference]: Finished difference Result 22 states and 27 transitions. [2023-11-24 23:49:04,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:49:04,493 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 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 [2023-11-24 23:49:04,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:49:04,493 INFO L225 Difference]: With dead ends: 22 [2023-11-24 23:49:04,494 INFO L226 Difference]: Without dead ends: 20 [2023-11-24 23:49:04,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:49:04,495 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 7 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:49:04,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 16 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:49:04,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-24 23:49:04,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-24 23:49:04,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:49:04,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2023-11-24 23:49:04,502 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 9 [2023-11-24 23:49:04,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:49:04,502 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2023-11-24 23:49:04,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2023-11-24 23:49:04,502 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2023-11-24 23:49:04,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-24 23:49:04,503 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:49:04,503 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:49:04,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 23:49:04,504 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 23:49:04,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:49:04,505 INFO L85 PathProgramCache]: Analyzing trace with hash -230350514, now seen corresponding path program 1 times [2023-11-24 23:49:04,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:49:04,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950057354] [2023-11-24 23:49:04,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:04,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:49:04,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:49:04,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:49:04,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:49:04,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950057354] [2023-11-24 23:49:04,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950057354] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:49:04,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622579390] [2023-11-24 23:49:04,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:04,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:49:04,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8e5a46-fabc-401c-a761-fcff4c824116/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:49:04,925 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8e5a46-fabc-401c-a761-fcff4c824116/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:49:04,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8e5a46-fabc-401c-a761-fcff4c824116/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 23:49:05,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:49:05,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-24 23:49:05,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:49:05,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:49:05,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:49:05,566 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:49:05,566 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 17 treesize of output 21 [2023-11-24 23:49:05,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:49:05,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622579390] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:49:05,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [566927100] [2023-11-24 23:49:05,678 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-24 23:49:05,678 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:49:05,679 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:49:05,680 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:49:05,680 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:49:08,479 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:49:14,577 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '698#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_~us~0#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post210#1.base|) (<= 2 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 2 |ULTIMATE.start_main_~nondetArea~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_#in~s2#1.offset|) (= |ULTIMATE.start_main_#t~malloc214#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc214#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#in~s2#1.base|) (or (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post210#1.base|) (+ |ULTIMATE.start_cstrncpy_#t~post210#1.offset| 1)) (< |ULTIMATE.start_cstrncpy_#t~post210#1.offset| 0)) (<= 2 |ULTIMATE.start_main_#t~malloc213#1.base|) (= |ULTIMATE.start_main_#t~malloc213#1.offset| 0) (<= 2 |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~s2#1.offset|) (<= 0 (+ |ULTIMATE.start_cstrncpy_~src~0#1.offset| 1)) (<= 0 |ULTIMATE.start_main_~nondetString~0#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 2 |ULTIMATE.start_cstrncpy_~s2#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#in~s1#1.base|))' at error location [2023-11-24 23:49:14,577 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-24 23:49:14,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:49:14,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2023-11-24 23:49:14,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95564001] [2023-11-24 23:49:14,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:49:14,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-24 23:49:14,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:49:14,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-24 23:49:14,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=996, Unknown=2, NotChecked=0, Total=1122 [2023-11-24 23:49:14,580 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:49:15,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:49:15,007 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2023-11-24 23:49:15,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 23:49:15,008 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-24 23:49:15,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:49:15,008 INFO L225 Difference]: With dead ends: 19 [2023-11-24 23:49:15,008 INFO L226 Difference]: Without dead ends: 13 [2023-11-24 23:49:15,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=208, Invalid=1430, Unknown=2, NotChecked=0, Total=1640 [2023-11-24 23:49:15,010 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:49:15,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 12 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:49:15,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-11-24 23:49:15,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-11-24 23:49:15,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 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) [2023-11-24 23:49:15,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2023-11-24 23:49:15,012 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 12 [2023-11-24 23:49:15,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:49:15,013 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2023-11-24 23:49:15,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:49:15,013 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2023-11-24 23:49:15,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-24 23:49:15,013 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:49:15,014 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1] [2023-11-24 23:49:15,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8e5a46-fabc-401c-a761-fcff4c824116/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-24 23:49:15,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8e5a46-fabc-401c-a761-fcff4c824116/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:49:15,219 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-24 23:49:15,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:49:15,220 INFO L85 PathProgramCache]: Analyzing trace with hash -966200463, now seen corresponding path program 2 times [2023-11-24 23:49:15,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:49:15,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617764956] [2023-11-24 23:49:15,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:15,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:49:15,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:49:15,845 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:49:15,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:49:15,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617764956] [2023-11-24 23:49:15,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617764956] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:49:15,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942172176] [2023-11-24 23:49:15,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 23:49:15,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:49:15,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8e5a46-fabc-401c-a761-fcff4c824116/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:49:15,848 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8e5a46-fabc-401c-a761-fcff4c824116/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:49:15,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8e5a46-fabc-401c-a761-fcff4c824116/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 23:49:15,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-24 23:49:15,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 23:49:15,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-24 23:49:15,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:49:15,954 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 [2023-11-24 23:49:15,982 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 11 treesize of output 7 [2023-11-24 23:49:16,019 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 16 treesize of output 11 [2023-11-24 23:49:16,076 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:49:16,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2023-11-24 23:49:16,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:49:16,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:49:16,317 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:49:16,318 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 19 treesize of output 23 [2023-11-24 23:49:16,385 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_128 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post206#1.base| v_ArrVal_128) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) 0) 0)) is different from false [2023-11-24 23:49:16,398 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_128 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst~0#1.base| v_ArrVal_128) |c_ULTIMATE.start_cstrncpy_~src~0#1.base|) 0) 0)) is different from false [2023-11-24 23:49:16,410 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:49:16,411 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 18 treesize of output 19 [2023-11-24 23:49:16,421 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:49:16,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2023-11-24 23:49:16,472 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2023-11-24 23:49:16,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942172176] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:49:16,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [730637813] [2023-11-24 23:49:16,479 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-24 23:49:16,480 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:49:16,480 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:49:16,480 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:49:16,481 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:49:19,127 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:49:20,061 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '844#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrncpy_~s1#1.base|) (<= 2 |ULTIMATE.start_main_~nondetString~0#1.base|) (<= 2 |ULTIMATE.start_main_~nondetArea~0#1.base|) (= |ULTIMATE.start_main_#t~malloc214#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc214#1.base|) (= (+ |ULTIMATE.start_cstrncpy_~src~0#1.offset| 1) |ULTIMATE.start_cstrncpy_#t~post207#1.offset|) (<= 2 |ULTIMATE.start_cstrncpy_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrncpy_~n#1|) (<= 2 |ULTIMATE.start_main_#t~malloc213#1.base|) (= |ULTIMATE.start_main_#t~malloc213#1.offset| 0) (= |ULTIMATE.start_cstrncpy_#t~post206#1.offset| (+ |ULTIMATE.start_cstrncpy_~dst~0#1.offset| 1)) (= |ULTIMATE.start_cstrncpy_#t~post207#1.base| |ULTIMATE.start_cstrncpy_~src~0#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#t~post207#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_~s2#1.base|) (or (< |ULTIMATE.start_cstrncpy_#t~post207#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrncpy_#t~post207#1.base|) (+ 1 |ULTIMATE.start_cstrncpy_#t~post207#1.offset|))) (= |ULTIMATE.start_cstrncpy_#t~post206#1.base| |ULTIMATE.start_cstrncpy_~dst~0#1.base|) (<= 2 |ULTIMATE.start_cstrncpy_#in~s1#1.base|))' at error location [2023-11-24 23:49:20,061 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-24 23:49:20,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:49:20,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2023-11-24 23:49:20,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134652652] [2023-11-24 23:49:20,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:49:20,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-24 23:49:20,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:49:20,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-24 23:49:20,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=722, Unknown=2, NotChecked=110, Total=930 [2023-11-24 23:49:20,063 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 25 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:49:20,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:49:20,623 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2023-11-24 23:49:20,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 23:49:20,624 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 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 [2023-11-24 23:49:20,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:49:20,624 INFO L225 Difference]: With dead ends: 14 [2023-11-24 23:49:20,624 INFO L226 Difference]: Without dead ends: 0 [2023-11-24 23:49:20,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=210, Invalid=1128, Unknown=2, NotChecked=142, Total=1482 [2023-11-24 23:49:20,626 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 11 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:49:20,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 0 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 111 Invalid, 0 Unknown, 25 Unchecked, 0.1s Time] [2023-11-24 23:49:20,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-24 23:49:20,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-24 23:49:20,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:49:20,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-24 23:49:20,627 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2023-11-24 23:49:20,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:49:20,628 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-24 23:49:20,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:49:20,628 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-24 23:49:20,628 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-24 23:49:20,630 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 9 remaining) [2023-11-24 23:49:20,631 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 9 remaining) [2023-11-24 23:49:20,631 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2023-11-24 23:49:20,631 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2023-11-24 23:49:20,631 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 9 remaining) [2023-11-24 23:49:20,631 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 9 remaining) [2023-11-24 23:49:20,632 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 9 remaining) [2023-11-24 23:49:20,632 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 9 remaining) [2023-11-24 23:49:20,632 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2023-11-24 23:49:20,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8e5a46-fabc-401c-a761-fcff4c824116/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 23:49:20,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8e5a46-fabc-401c-a761-fcff4c824116/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-24 23:49:20,840 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:49:20,842 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-24 23:49:20,845 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.11 11:49:20 BoogieIcfgContainer [2023-11-24 23:49:20,845 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-24 23:49:20,846 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-24 23:49:20,846 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-24 23:49:20,846 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-24 23:49:20,847 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:48:53" (3/4) ... [2023-11-24 23:49:20,848 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-24 23:49:20,855 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2023-11-24 23:49:20,856 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2023-11-24 23:49:20,856 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-11-24 23:49:20,856 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-11-24 23:49:20,945 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8e5a46-fabc-401c-a761-fcff4c824116/bin/utaipan-verify-SwPr7d2a91/witness.graphml [2023-11-24 23:49:20,945 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8e5a46-fabc-401c-a761-fcff4c824116/bin/utaipan-verify-SwPr7d2a91/witness.yml [2023-11-24 23:49:20,945 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-24 23:49:20,946 INFO L158 Benchmark]: Toolchain (without parser) took 28530.78ms. Allocated memory was 165.7MB in the beginning and 557.8MB in the end (delta: 392.2MB). Free memory was 135.1MB in the beginning and 393.6MB in the end (delta: -258.5MB). Peak memory consumption was 134.1MB. Max. memory is 16.1GB. [2023-11-24 23:49:20,946 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 121.6MB. Free memory is still 79.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 23:49:20,948 INFO L158 Benchmark]: CACSL2BoogieTranslator took 640.99ms. Allocated memory is still 165.7MB. Free memory was 134.7MB in the beginning and 116.2MB in the end (delta: 18.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-11-24 23:49:20,949 INFO L158 Benchmark]: Boogie Procedure Inliner took 68.57ms. Allocated memory is still 165.7MB. Free memory was 116.2MB in the beginning and 114.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-24 23:49:20,949 INFO L158 Benchmark]: Boogie Preprocessor took 56.56ms. Allocated memory is still 165.7MB. Free memory was 114.1MB in the beginning and 112.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 23:49:20,949 INFO L158 Benchmark]: RCFGBuilder took 484.39ms. Allocated memory is still 165.7MB. Free memory was 112.8MB in the beginning and 96.5MB in the end (delta: 16.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-11-24 23:49:20,950 INFO L158 Benchmark]: TraceAbstraction took 27171.48ms. Allocated memory was 165.7MB in the beginning and 557.8MB in the end (delta: 392.2MB). Free memory was 95.7MB in the beginning and 398.9MB in the end (delta: -303.2MB). Peak memory consumption was 92.1MB. Max. memory is 16.1GB. [2023-11-24 23:49:20,950 INFO L158 Benchmark]: Witness Printer took 99.47ms. Allocated memory is still 557.8MB. Free memory was 398.9MB in the beginning and 393.6MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-24 23:49:20,952 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 121.6MB. Free memory is still 79.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 640.99ms. Allocated memory is still 165.7MB. Free memory was 134.7MB in the beginning and 116.2MB in the end (delta: 18.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 68.57ms. Allocated memory is still 165.7MB. Free memory was 116.2MB in the beginning and 114.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 56.56ms. Allocated memory is still 165.7MB. Free memory was 114.1MB in the beginning and 112.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 484.39ms. Allocated memory is still 165.7MB. Free memory was 112.8MB in the beginning and 96.5MB in the end (delta: 16.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 27171.48ms. Allocated memory was 165.7MB in the beginning and 557.8MB in the end (delta: 392.2MB). Free memory was 95.7MB in the beginning and 398.9MB in the end (delta: -303.2MB). Peak memory consumption was 92.1MB. Max. memory is 16.1GB. * Witness Printer took 99.47ms. Allocated memory is still 557.8MB. Free memory was 398.9MB in the beginning and 393.6MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 382]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 9 error locations. Started 1 CEGAR loops. OverallTime: 27.1s, OverallIterations: 13, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 181 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 181 mSDsluCounter, 252 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 25 IncrementalHoareTripleChecker+Unchecked, 152 mSDsCounter, 25 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 729 IncrementalHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 25 mSolverCounterUnsat, 100 mSDtfsCounter, 729 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 179 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 140 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 10.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=10, InterpolantAutomatonStates: 86, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 7 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.9s InterpolantComputationTime, 118 NumberOfCodeBlocks, 118 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 131 ConstructedInterpolants, 3 QuantifiedInterpolants, 1606 SizeOfPredicates, 45 NumberOfNonLiveVariables, 476 ConjunctsInSsa, 151 ConjunctsInUnsatCore, 19 InterpolantComputations, 10 PerfectInterpolantSequences, 2/40 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 9 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-24 23:49:20,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa8e5a46-fabc-401c-a761-fcff4c824116/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE