./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c --full-output --architecture 32bit -------------------------------------------------------------------------------- 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_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6ef2b56a2f4ebf2e6f7f4ededf8760f087ff726b08e36644d8dcb52a8d087cd1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 12:40:21,677 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 12:40:21,743 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-12-02 12:40:21,748 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 12:40:21,749 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 12:40:21,774 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 12:40:21,775 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 12:40:21,775 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 12:40:21,776 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 12:40:21,777 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 12:40:21,777 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 12:40:21,778 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 12:40:21,779 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 12:40:21,779 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 12:40:21,780 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 12:40:21,780 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 12:40:21,781 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 12:40:21,781 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 12:40:21,782 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 12:40:21,783 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 12:40:21,783 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 12:40:21,785 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 12:40:21,786 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 12:40:21,787 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 12:40:21,787 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 12:40:21,788 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 12:40:21,788 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 12:40:21,789 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 12:40:21,789 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 12:40:21,789 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 12:40:21,790 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 12:40:21,790 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 12:40:21,790 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 12:40:21,790 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 12:40:21,791 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 12:40:21,791 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 12:40:21,791 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 12:40:21,791 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 12:40:21,792 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 12:40:21,792 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 12:40:21,792 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:40:21,792 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 12:40:21,793 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 12:40:21,793 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 12:40:21,793 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 12:40:21,793 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 12:40:21,793 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 12:40:21,793 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 12:40:21,794 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_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ef2b56a2f4ebf2e6f7f4ededf8760f087ff726b08e36644d8dcb52a8d087cd1 [2023-12-02 12:40:22,016 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 12:40:22,038 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 12:40:22,040 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 12:40:22,041 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 12:40:22,042 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 12:40:22,042 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c [2023-12-02 12:40:25,021 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 12:40:25,192 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 12:40:25,192 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c [2023-12-02 12:40:25,200 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/data/36b1786d0/c65c28b535a049829133d9578870a923/FLAG2627af991 [2023-12-02 12:40:25,217 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/data/36b1786d0/c65c28b535a049829133d9578870a923 [2023-12-02 12:40:25,220 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 12:40:25,222 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 12:40:25,224 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 12:40:25,224 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 12:40:25,231 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 12:40:25,232 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:40:25" (1/1) ... [2023-12-02 12:40:25,233 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@461dc0e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:40:25, skipping insertion in model container [2023-12-02 12:40:25,234 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:40:25" (1/1) ... [2023-12-02 12:40:25,257 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 12:40:25,433 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:40:25,445 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 12:40:25,465 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:40:25,483 INFO L206 MainTranslator]: Completed translation [2023-12-02 12:40:25,483 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:40:25 WrapperNode [2023-12-02 12:40:25,483 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 12:40:25,485 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 12:40:25,485 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 12:40:25,485 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 12:40:25,494 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:40:25" (1/1) ... [2023-12-02 12:40:25,502 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:40:25" (1/1) ... [2023-12-02 12:40:25,525 INFO L138 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 69 [2023-12-02 12:40:25,526 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 12:40:25,527 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 12:40:25,527 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 12:40:25,527 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 12:40:25,537 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:40:25" (1/1) ... [2023-12-02 12:40:25,537 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:40:25" (1/1) ... [2023-12-02 12:40:25,540 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:40:25" (1/1) ... [2023-12-02 12:40:25,540 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:40:25" (1/1) ... [2023-12-02 12:40:25,546 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:40:25" (1/1) ... [2023-12-02 12:40:25,551 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:40:25" (1/1) ... [2023-12-02 12:40:25,552 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:40:25" (1/1) ... [2023-12-02 12:40:25,554 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:40:25" (1/1) ... [2023-12-02 12:40:25,556 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 12:40:25,557 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 12:40:25,557 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 12:40:25,557 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 12:40:25,558 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:40:25" (1/1) ... [2023-12-02 12:40:25,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:40:25,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:40:25,592 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 12:40:25,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 12:40:25,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 12:40:25,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 12:40:25,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 12:40:25,634 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 12:40:25,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 12:40:25,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 12:40:25,724 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 12:40:25,727 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 12:40:25,883 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 12:40:25,952 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 12:40:25,953 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-02 12:40:25,954 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:40:25 BoogieIcfgContainer [2023-12-02 12:40:25,955 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 12:40:25,965 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 12:40:25,965 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 12:40:25,969 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 12:40:25,969 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:40:25" (1/3) ... [2023-12-02 12:40:25,974 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@592d13eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:40:25, skipping insertion in model container [2023-12-02 12:40:25,974 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:40:25" (2/3) ... [2023-12-02 12:40:25,975 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@592d13eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:40:25, skipping insertion in model container [2023-12-02 12:40:25,975 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:40:25" (3/3) ... [2023-12-02 12:40:25,976 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength6.c [2023-12-02 12:40:25,996 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 12:40:25,997 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-12-02 12:40:26,040 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 12:40:26,047 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;@30ebde1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 12:40:26,048 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-12-02 12:40:26,053 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 10 states have (on average 2.2) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:40:26,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 12:40:26,060 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:40:26,061 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 12:40:26,062 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-12-02 12:40:26,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:40:26,068 INFO L85 PathProgramCache]: Analyzing trace with hash 3212319, now seen corresponding path program 1 times [2023-12-02 12:40:26,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:40:26,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589565153] [2023-12-02 12:40:26,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:40:26,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:40:26,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:40:26,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:40:26,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:40:26,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589565153] [2023-12-02 12:40:26,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589565153] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:40:26,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:40:26,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 12:40:26,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646537646] [2023-12-02 12:40:26,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:40:26,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:40:26,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:40:26,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:40:26,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:40:26,391 INFO L87 Difference]: Start difference. First operand has 19 states, 10 states have (on average 2.2) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:40:26,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:40:26,468 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2023-12-02 12:40:26,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:40:26,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-12-02 12:40:26,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:40:26,480 INFO L225 Difference]: With dead ends: 36 [2023-12-02 12:40:26,481 INFO L226 Difference]: Without dead ends: 35 [2023-12-02 12:40:26,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:40:26,487 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 16 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:40:26,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 16 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:40:26,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-12-02 12:40:26,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2023-12-02 12:40:26,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:40:26,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2023-12-02 12:40:26,527 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2023-12-02 12:40:26,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:40:26,528 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2023-12-02 12:40:26,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:40:26,528 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2023-12-02 12:40:26,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 12:40:26,529 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:40:26,529 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 12:40:26,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 12:40:26,530 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-12-02 12:40:26,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:40:26,531 INFO L85 PathProgramCache]: Analyzing trace with hash 3138242, now seen corresponding path program 1 times [2023-12-02 12:40:26,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:40:26,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846563988] [2023-12-02 12:40:26,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:40:26,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:40:26,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:40:26,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:40:26,614 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:40:26,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846563988] [2023-12-02 12:40:26,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846563988] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:40:26,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:40:26,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 12:40:26,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692553644] [2023-12-02 12:40:26,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:40:26,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:40:26,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:40:26,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:40:26,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:40:26,619 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:40:26,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:40:26,655 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2023-12-02 12:40:26,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:40:26,656 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-12-02 12:40:26,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:40:26,657 INFO L225 Difference]: With dead ends: 25 [2023-12-02 12:40:26,657 INFO L226 Difference]: Without dead ends: 25 [2023-12-02 12:40:26,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:40:26,659 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:40:26,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 18 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:40:26,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-12-02 12:40:26,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2023-12-02 12:40:26,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:40:26,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-12-02 12:40:26,665 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 4 [2023-12-02 12:40:26,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:40:26,665 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-12-02 12:40:26,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:40:26,666 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-12-02 12:40:26,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 12:40:26,666 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:40:26,667 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 12:40:26,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 12:40:26,667 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-12-02 12:40:26,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:40:26,668 INFO L85 PathProgramCache]: Analyzing trace with hash 3140272, now seen corresponding path program 1 times [2023-12-02 12:40:26,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:40:26,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129269768] [2023-12-02 12:40:26,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:40:26,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:40:26,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:40:26,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:40:26,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:40:26,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129269768] [2023-12-02 12:40:26,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129269768] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:40:26,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:40:26,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:40:26,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529441870] [2023-12-02 12:40:26,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:40:26,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:40:26,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:40:26,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:40:26,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:40:26,756 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:40:26,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:40:26,792 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2023-12-02 12:40:26,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:40:26,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-12-02 12:40:26,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:40:26,794 INFO L225 Difference]: With dead ends: 25 [2023-12-02 12:40:26,794 INFO L226 Difference]: Without dead ends: 25 [2023-12-02 12:40:26,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:40:26,797 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:40:26,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 18 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:40:26,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-12-02 12:40:26,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2023-12-02 12:40:26,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 21 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) [2023-12-02 12:40:26,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2023-12-02 12:40:26,803 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 4 [2023-12-02 12:40:26,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:40:26,803 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2023-12-02 12:40:26,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:40:26,804 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2023-12-02 12:40:26,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 12:40:26,804 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:40:26,805 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 12:40:26,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 12:40:26,805 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-12-02 12:40:26,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:40:26,806 INFO L85 PathProgramCache]: Analyzing trace with hash 97285555, now seen corresponding path program 1 times [2023-12-02 12:40:26,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:40:26,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279356820] [2023-12-02 12:40:26,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:40:26,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:40:26,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:40:26,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:40:26,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:40:26,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279356820] [2023-12-02 12:40:26,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279356820] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:40:26,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:40:26,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 12:40:26,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834162375] [2023-12-02 12:40:26,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:40:26,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:40:26,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:40:26,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:40:26,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:40:26,889 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:40:26,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:40:26,935 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2023-12-02 12:40:26,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:40:26,935 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-12-02 12:40:26,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:40:26,936 INFO L225 Difference]: With dead ends: 21 [2023-12-02 12:40:26,936 INFO L226 Difference]: Without dead ends: 21 [2023-12-02 12:40:26,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 12:40:26,938 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:40:26,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 10 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:40:26,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-02 12:40:26,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-12-02 12:40:26,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.7142857142857142) 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) [2023-12-02 12:40:26,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2023-12-02 12:40:26,942 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 5 [2023-12-02 12:40:26,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:40:26,943 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2023-12-02 12:40:26,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:40:26,943 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2023-12-02 12:40:26,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 12:40:26,944 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:40:26,944 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 12:40:26,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 12:40:26,944 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-12-02 12:40:26,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:40:26,945 INFO L85 PathProgramCache]: Analyzing trace with hash 97285556, now seen corresponding path program 1 times [2023-12-02 12:40:26,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:40:26,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225893964] [2023-12-02 12:40:26,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:40:26,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:40:26,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:40:27,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:40:27,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:40:27,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225893964] [2023-12-02 12:40:27,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225893964] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:40:27,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:40:27,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 12:40:27,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222900509] [2023-12-02 12:40:27,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:40:27,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:40:27,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:40:27,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:40:27,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:40:27,084 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:40:27,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:40:27,146 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2023-12-02 12:40:27,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:40:27,146 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-12-02 12:40:27,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:40:27,147 INFO L225 Difference]: With dead ends: 22 [2023-12-02 12:40:27,147 INFO L226 Difference]: Without dead ends: 22 [2023-12-02 12:40:27,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 12:40:27,149 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 19 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:40:27,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 10 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:40:27,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-02 12:40:27,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-12-02 12:40:27,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 21 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) [2023-12-02 12:40:27,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2023-12-02 12:40:27,154 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 5 [2023-12-02 12:40:27,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:40:27,154 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2023-12-02 12:40:27,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:40:27,155 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2023-12-02 12:40:27,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 12:40:27,155 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:40:27,155 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2023-12-02 12:40:27,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 12:40:27,156 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-12-02 12:40:27,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:40:27,156 INFO L85 PathProgramCache]: Analyzing trace with hash -997809686, now seen corresponding path program 1 times [2023-12-02 12:40:27,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:40:27,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282468813] [2023-12-02 12:40:27,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:40:27,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:40:27,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:40:27,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:40:27,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:40:27,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282468813] [2023-12-02 12:40:27,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282468813] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:40:27,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270093881] [2023-12-02 12:40:27,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:40:27,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:40:27,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:40:27,230 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:40:27,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 12:40:27,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:40:27,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 12:40:27,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:40:27,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:40:27,332 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:40:27,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:40:27,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270093881] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:40:27,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [323845141] [2023-12-02 12:40:27,390 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-12-02 12:40:27,390 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:40:27,394 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:40:27,400 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:40:27,400 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:40:28,233 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:40:28,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [323845141] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:40:28,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:40:28,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3] total 9 [2023-12-02 12:40:28,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062828880] [2023-12-02 12:40:28,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:40:28,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 12:40:28,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:40:28,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 12:40:28,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-12-02 12:40:28,579 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:40:28,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:40:28,940 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2023-12-02 12:40:28,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 12:40:28,941 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 12:40:28,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:40:28,942 INFO L225 Difference]: With dead ends: 30 [2023-12-02 12:40:28,942 INFO L226 Difference]: Without dead ends: 30 [2023-12-02 12:40:28,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-12-02 12:40:28,944 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 9 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:40:28,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 12 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:40:28,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-12-02 12:40:28,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2023-12-02 12:40:28,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:40:28,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2023-12-02 12:40:28,949 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 7 [2023-12-02 12:40:28,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:40:28,949 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2023-12-02 12:40:28,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:40:28,949 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2023-12-02 12:40:28,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 12:40:28,950 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:40:28,950 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2023-12-02 12:40:28,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 12:40:29,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:40:29,151 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-12-02 12:40:29,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:40:29,151 INFO L85 PathProgramCache]: Analyzing trace with hash -867329140, now seen corresponding path program 1 times [2023-12-02 12:40:29,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:40:29,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426480173] [2023-12-02 12:40:29,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:40:29,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:40:29,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:40:29,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:40:29,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:40:29,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426480173] [2023-12-02 12:40:29,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426480173] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:40:29,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24454224] [2023-12-02 12:40:29,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:40:29,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:40:29,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:40:29,297 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:40:29,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 12:40:29,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:40:29,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-02 12:40:29,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:40:29,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 12:40:29,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:40:29,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:40:29,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:40:29,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24454224] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:40:29,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [769216239] [2023-12-02 12:40:29,595 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-12-02 12:40:29,595 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:40:29,596 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:40:29,596 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:40:29,596 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:40:29,999 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:40:30,512 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '441#(and (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 2 |ULTIMATE.start_foo_~b#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (<= 2 |ULTIMATE.start_main_~#mask~0#1.base|) (<= |ULTIMATE.start_foo_~i~0#1| 31) (<= 2 |ULTIMATE.start_main_~c~0#1.base|) (= 32 |ULTIMATE.start_foo_~size#1|) (= |ULTIMATE.start_foo_~b#1.offset| 0) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (= 32 |ULTIMATE.start_foo_#in~size#1|) (<= (select |#length| |ULTIMATE.start_foo_~b#1.base|) |ULTIMATE.start_foo_~i~0#1|) (<= 2 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~i~0#1|))' at error location [2023-12-02 12:40:30,513 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:40:30,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:40:30,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2023-12-02 12:40:30,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955279353] [2023-12-02 12:40:30,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:40:30,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 12:40:30,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:40:30,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 12:40:30,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-12-02 12:40:30,515 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 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) [2023-12-02 12:40:30,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:40:30,682 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2023-12-02 12:40:30,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 12:40:30,683 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 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) Word has length 8 [2023-12-02 12:40:30,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:40:30,685 INFO L225 Difference]: With dead ends: 49 [2023-12-02 12:40:30,685 INFO L226 Difference]: Without dead ends: 49 [2023-12-02 12:40:30,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2023-12-02 12:40:30,686 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 69 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:40:30,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 21 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:40:30,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-12-02 12:40:30,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2023-12-02 12:40:30,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 40 states have (on average 1.5) internal successors, (60), 46 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:40:30,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2023-12-02 12:40:30,694 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 8 [2023-12-02 12:40:30,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:40:30,694 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2023-12-02 12:40:30,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 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) [2023-12-02 12:40:30,694 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2023-12-02 12:40:30,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 12:40:30,695 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:40:30,695 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:40:30,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-02 12:40:30,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-12-02 12:40:30,896 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-12-02 12:40:30,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:40:30,896 INFO L85 PathProgramCache]: Analyzing trace with hash -217830189, now seen corresponding path program 1 times [2023-12-02 12:40:30,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:40:30,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676809652] [2023-12-02 12:40:30,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:40:30,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:40:30,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:40:30,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 12:40:30,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:40:30,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676809652] [2023-12-02 12:40:30,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676809652] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:40:30,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:40:30,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 12:40:30,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34450091] [2023-12-02 12:40:30,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:40:30,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:40:30,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:40:30,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:40:30,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:40:30,926 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:40:30,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:40:30,948 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2023-12-02 12:40:30,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:40:30,949 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-02 12:40:30,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:40:30,950 INFO L225 Difference]: With dead ends: 45 [2023-12-02 12:40:30,950 INFO L226 Difference]: Without dead ends: 45 [2023-12-02 12:40:30,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:40:30,951 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:40:30,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 7 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:40:30,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-12-02 12:40:30,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-12-02 12:40:30,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.45) internal successors, (58), 44 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:40:30,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2023-12-02 12:40:30,958 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 10 [2023-12-02 12:40:30,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:40:30,958 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2023-12-02 12:40:30,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:40:30,958 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2023-12-02 12:40:30,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 12:40:30,959 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:40:30,959 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:40:30,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 12:40:30,960 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-12-02 12:40:30,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:40:30,960 INFO L85 PathProgramCache]: Analyzing trace with hash -217830188, now seen corresponding path program 1 times [2023-12-02 12:40:30,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:40:30,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412954707] [2023-12-02 12:40:30,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:40:30,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:40:30,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:40:31,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 12:40:31,036 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:40:31,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412954707] [2023-12-02 12:40:31,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412954707] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:40:31,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492584142] [2023-12-02 12:40:31,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:40:31,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:40:31,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:40:31,038 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:40:31,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 12:40:31,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:40:31,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 12:40:31,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:40:31,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:40:31,140 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:40:31,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:40:31,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492584142] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:40:31,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [485826935] [2023-12-02 12:40:31,176 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 12:40:31,176 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:40:31,176 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:40:31,177 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:40:31,177 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:40:32,312 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:40:32,409 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '705#(and (= |ULTIMATE.start_main_~i~1#1| 0) (exists ((|v_ULTIMATE.start_main_~i~1#1_43| Int)) (<= 32 (mod |v_ULTIMATE.start_main_~i~1#1_43| 4294967296))) (or (< |ULTIMATE.start_main_~#b~0#1.offset| 0) (< (select |#length| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| 4))))' at error location [2023-12-02 12:40:32,410 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:40:32,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:40:32,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 9 [2023-12-02 12:40:32,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460574964] [2023-12-02 12:40:32,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:40:32,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 12:40:32,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:40:32,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 12:40:32,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-12-02 12:40:32,412 INFO L87 Difference]: Start difference. First operand 45 states and 58 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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) [2023-12-02 12:40:32,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:40:32,605 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2023-12-02 12:40:32,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 12:40:32,605 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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) Word has length 10 [2023-12-02 12:40:32,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:40:32,606 INFO L225 Difference]: With dead ends: 49 [2023-12-02 12:40:32,606 INFO L226 Difference]: Without dead ends: 49 [2023-12-02 12:40:32,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2023-12-02 12:40:32,607 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 74 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:40:32,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 4 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:40:32,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-12-02 12:40:32,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2023-12-02 12:40:32,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 45 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:40:32,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2023-12-02 12:40:32,612 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 10 [2023-12-02 12:40:32,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:40:32,613 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2023-12-02 12:40:32,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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) [2023-12-02 12:40:32,613 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2023-12-02 12:40:32,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 12:40:32,614 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:40:32,614 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1] [2023-12-02 12:40:32,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-02 12:40:32,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:40:32,815 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-12-02 12:40:32,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:40:32,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1142696012, now seen corresponding path program 2 times [2023-12-02 12:40:32,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:40:32,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707078813] [2023-12-02 12:40:32,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:40:32,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:40:32,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:40:33,046 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:40:33,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:40:33,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707078813] [2023-12-02 12:40:33,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707078813] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:40:33,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813211492] [2023-12-02 12:40:33,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:40:33,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:40:33,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:40:33,049 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:40:33,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 12:40:33,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 12:40:33,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:40:33,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 12:40:33,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:40:33,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 12:40:33,298 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 12:40:33,299 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:40:33,494 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 12:40:33,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813211492] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:40:33,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1329379228] [2023-12-02 12:40:33,497 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-12-02 12:40:33,497 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:40:33,497 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:40:33,497 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:40:33,498 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:40:33,838 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:40:34,464 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '933#(and (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 2 |ULTIMATE.start_foo_~b#1.base|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (<= 2 |ULTIMATE.start_main_~#mask~0#1.base|) (<= |ULTIMATE.start_foo_~i~0#1| 31) (<= 2 |ULTIMATE.start_main_~c~0#1.base|) (= 32 |ULTIMATE.start_foo_~size#1|) (= |ULTIMATE.start_foo_~b#1.offset| 0) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (= 32 |ULTIMATE.start_foo_#in~size#1|) (<= (select |#length| |ULTIMATE.start_foo_~b#1.base|) |ULTIMATE.start_foo_~i~0#1|) (<= 2 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~i~0#1|))' at error location [2023-12-02 12:40:34,464 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:40:34,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:40:34,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 14 [2023-12-02 12:40:34,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776852851] [2023-12-02 12:40:34,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:40:34,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 12:40:34,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:40:34,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 12:40:34,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2023-12-02 12:40:34,467 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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) [2023-12-02 12:40:34,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:40:34,806 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2023-12-02 12:40:34,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 12:40:34,806 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 17 [2023-12-02 12:40:34,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:40:34,807 INFO L225 Difference]: With dead ends: 52 [2023-12-02 12:40:34,807 INFO L226 Difference]: Without dead ends: 52 [2023-12-02 12:40:34,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=208, Invalid=722, Unknown=0, NotChecked=0, Total=930 [2023-12-02 12:40:34,809 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 101 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:40:34,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 9 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:40:34,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-12-02 12:40:34,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2023-12-02 12:40:34,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:40:34,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2023-12-02 12:40:34,813 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 17 [2023-12-02 12:40:34,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:40:34,813 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2023-12-02 12:40:34,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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) [2023-12-02 12:40:34,813 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2023-12-02 12:40:34,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-02 12:40:34,814 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:40:34,814 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:40:34,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 12:40:35,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 12:40:35,023 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-12-02 12:40:35,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:40:35,024 INFO L85 PathProgramCache]: Analyzing trace with hash -956812969, now seen corresponding path program 1 times [2023-12-02 12:40:35,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:40:35,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446462951] [2023-12-02 12:40:35,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:40:35,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:40:35,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:40:35,154 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:40:35,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:40:35,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446462951] [2023-12-02 12:40:35,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446462951] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:40:35,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105724880] [2023-12-02 12:40:35,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:40:35,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:40:35,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:40:35,156 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:40:35,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 12:40:35,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:40:35,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 12:40:35,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:40:35,331 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:40:35,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:40:35,427 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:40:35,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105724880] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:40:35,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1917921478] [2023-12-02 12:40:35,430 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 12:40:35,430 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:40:35,430 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:40:35,430 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:40:35,430 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:40:36,466 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:40:36,713 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1188#(and (exists ((|v_#valid_45| (Array Int Int)) (|v_ULTIMATE.start_main_~#b~0#1.offset_25| Int) (|v_ULTIMATE.start_main_~#mask~0#1.base_21| Int) (|v_ULTIMATE.start_main_~#b~0#1.base_30| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#b~0#1.offset_25|) (= (store (store |v_#valid_45| |v_ULTIMATE.start_main_~#b~0#1.base_30| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_21| 0) |#valid|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_30|) |v_ULTIMATE.start_main_~#b~0#1.offset_25|) 32)) (= (select |v_#valid_45| |v_ULTIMATE.start_main_~#b~0#1.base_30|) 1) (<= (+ |v_ULTIMATE.start_main_~#b~0#1.offset_25| 4) (select |#length| |v_ULTIMATE.start_main_~#b~0#1.base_30|)))) (exists ((|v_ULTIMATE.start_main_~i~1#1_49| Int)) (<= 32 (mod |v_ULTIMATE.start_main_~i~1#1_49| 4294967296))) (= |ULTIMATE.start_main_~i~1#1| 0) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (= |ULTIMATE.start_main_#res#1| 1))' at error location [2023-12-02 12:40:36,713 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:40:36,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:40:36,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-12-02 12:40:36,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934646562] [2023-12-02 12:40:36,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:40:36,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 12:40:36,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:40:36,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 12:40:36,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2023-12-02 12:40:36,715 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:40:36,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:40:36,768 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2023-12-02 12:40:36,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 12:40:36,768 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-12-02 12:40:36,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:40:36,769 INFO L225 Difference]: With dead ends: 76 [2023-12-02 12:40:36,769 INFO L226 Difference]: Without dead ends: 76 [2023-12-02 12:40:36,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2023-12-02 12:40:36,770 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:40:36,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 11 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:40:36,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-12-02 12:40:36,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2023-12-02 12:40:36,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 73 states have (on average 1.095890410958904) internal successors, (80), 75 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:40:36,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2023-12-02 12:40:36,776 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 21 [2023-12-02 12:40:36,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:40:36,776 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2023-12-02 12:40:36,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:40:36,777 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2023-12-02 12:40:36,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-02 12:40:36,778 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:40:36,778 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:40:36,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 12:40:36,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:40:36,984 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-12-02 12:40:36,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:40:36,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1405887575, now seen corresponding path program 2 times [2023-12-02 12:40:36,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:40:36,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923639956] [2023-12-02 12:40:36,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:40:36,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:40:37,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:40:37,244 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 1 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:40:37,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:40:37,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923639956] [2023-12-02 12:40:37,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923639956] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:40:37,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11362891] [2023-12-02 12:40:37,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:40:37,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:40:37,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:40:37,246 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:40:37,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 12:40:37,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-12-02 12:40:37,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:40:37,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 12:40:37,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:40:38,059 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2023-12-02 12:40:38,059 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:40:38,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11362891] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:40:38,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:40:38,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [13] total 15 [2023-12-02 12:40:38,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013123039] [2023-12-02 12:40:38,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:40:38,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:40:38,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:40:38,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:40:38,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2023-12-02 12:40:38,061 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:40:38,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:40:38,165 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2023-12-02 12:40:38,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:40:38,166 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-12-02 12:40:38,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:40:38,166 INFO L225 Difference]: With dead ends: 75 [2023-12-02 12:40:38,166 INFO L226 Difference]: Without dead ends: 74 [2023-12-02 12:40:38,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2023-12-02 12:40:38,167 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:40:38,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 6 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 5 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:40:38,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-12-02 12:40:38,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2023-12-02 12:40:38,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 73 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:40:38,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2023-12-02 12:40:38,172 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 39 [2023-12-02 12:40:38,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:40:38,173 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2023-12-02 12:40:38,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:40:38,173 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2023-12-02 12:40:38,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-02 12:40:38,174 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:40:38,174 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:40:38,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 12:40:38,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:40:38,375 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-12-02 12:40:38,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:40:38,375 INFO L85 PathProgramCache]: Analyzing trace with hash 632847126, now seen corresponding path program 1 times [2023-12-02 12:40:38,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:40:38,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383193135] [2023-12-02 12:40:38,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:40:38,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:40:38,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:40:38,653 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 1 proven. 145 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:40:38,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:40:38,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383193135] [2023-12-02 12:40:38,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383193135] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:40:38,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900737463] [2023-12-02 12:40:38,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:40:38,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:40:38,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:40:38,654 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:40:38,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 12:40:38,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:40:38,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 12:40:38,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:40:38,953 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 1 proven. 145 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:40:38,954 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:40:39,281 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 1 proven. 145 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:40:39,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900737463] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:40:39,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1454677512] [2023-12-02 12:40:39,283 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-12-02 12:40:39,283 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:40:39,284 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:40:39,284 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:40:39,284 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:40:40,136 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:40:40,539 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1894#(and (<= (mod |ULTIMATE.start_main_~i~1#1| 4294967296) 31) (<= 0 |ULTIMATE.start_main_~i~1#1|) (or (< (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)) 0) (< (select |#length| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4) 4))))' at error location [2023-12-02 12:40:40,540 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:40:40,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:40:40,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 35 [2023-12-02 12:40:40,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212722877] [2023-12-02 12:40:40,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:40:40,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-02 12:40:40,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:40:40,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-02 12:40:40,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=1161, Unknown=0, NotChecked=0, Total=1722 [2023-12-02 12:40:40,543 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 35 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:40:40,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:40:40,678 INFO L93 Difference]: Finished difference Result 146 states and 149 transitions. [2023-12-02 12:40:40,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 12:40:40,678 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 35 states have internal predecessors, (103), 0 states have call successors, (0), 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 40 [2023-12-02 12:40:40,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:40:40,680 INFO L225 Difference]: With dead ends: 146 [2023-12-02 12:40:40,680 INFO L226 Difference]: Without dead ends: 146 [2023-12-02 12:40:40,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 81 SyntacticMatches, 10 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=561, Invalid=1161, Unknown=0, NotChecked=0, Total=1722 [2023-12-02 12:40:40,682 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:40:40,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 25 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:40:40,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-12-02 12:40:40,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2023-12-02 12:40:40,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 144 states have (on average 1.0347222222222223) internal successors, (149), 145 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:40:40,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 149 transitions. [2023-12-02 12:40:40,691 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 149 transitions. Word has length 40 [2023-12-02 12:40:40,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:40:40,691 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 149 transitions. [2023-12-02 12:40:40,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 35 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:40:40,691 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 149 transitions. [2023-12-02 12:40:40,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-02 12:40:40,694 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:40:40,694 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:40:40,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 12:40:40,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:40:40,895 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-12-02 12:40:40,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:40:40,895 INFO L85 PathProgramCache]: Analyzing trace with hash -566651626, now seen corresponding path program 2 times [2023-12-02 12:40:40,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:40:40,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524786204] [2023-12-02 12:40:40,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:40:40,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:40:40,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:40:41,639 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 1 proven. 715 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:40:41,639 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:40:41,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524786204] [2023-12-02 12:40:41,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524786204] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:40:41,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689587129] [2023-12-02 12:40:41,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:40:41,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:40:41,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:40:41,641 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:40:41,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 12:40:41,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 12:40:41,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:40:41,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 12:40:41,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:40:41,824 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 717 trivial. 0 not checked. [2023-12-02 12:40:41,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:40:42,022 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2023-12-02 12:40:42,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689587129] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:40:42,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [88927592] [2023-12-02 12:40:42,024 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-12-02 12:40:42,025 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:40:42,025 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:40:42,025 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:40:42,025 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:40:42,871 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:40:43,729 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2674#(and (<= (mod |ULTIMATE.start_main_~i~1#1| 4294967296) 31) (<= 0 |ULTIMATE.start_main_~i~1#1|) (or (< (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)) 0) (< (select |#length| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4) 4))))' at error location [2023-12-02 12:40:43,729 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:40:43,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:40:43,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 3, 5] total 31 [2023-12-02 12:40:43,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700912667] [2023-12-02 12:40:43,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:40:43,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-02 12:40:43,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:40:43,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-02 12:40:43,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=1063, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 12:40:43,731 INFO L87 Difference]: Start difference. First operand 146 states and 149 transitions. Second operand has 31 states, 31 states have (on average 3.064516129032258) internal successors, (95), 31 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:40:46,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:40:46,789 INFO L93 Difference]: Finished difference Result 317 states and 322 transitions. [2023-12-02 12:40:46,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2023-12-02 12:40:46,789 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.064516129032258) internal successors, (95), 31 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2023-12-02 12:40:46,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:40:46,791 INFO L225 Difference]: With dead ends: 317 [2023-12-02 12:40:46,791 INFO L226 Difference]: Without dead ends: 317 [2023-12-02 12:40:46,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 193 SyntacticMatches, 22 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5344 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4397, Invalid=12633, Unknown=0, NotChecked=0, Total=17030 [2023-12-02 12:40:46,798 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 326 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:40:46,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 0 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:40:46,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2023-12-02 12:40:46,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 297. [2023-12-02 12:40:46,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 295 states have (on average 1.0305084745762711) internal successors, (304), 296 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:40:46,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 304 transitions. [2023-12-02 12:40:46,809 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 304 transitions. Word has length 76 [2023-12-02 12:40:46,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:40:46,810 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 304 transitions. [2023-12-02 12:40:46,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.064516129032258) internal successors, (95), 31 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:40:46,810 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 304 transitions. [2023-12-02 12:40:46,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-12-02 12:40:46,814 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:40:46,814 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 2, 2, 1, 1, 1] [2023-12-02 12:40:46,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 12:40:47,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 12:40:47,014 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-12-02 12:40:47,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:40:47,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1136633460, now seen corresponding path program 1 times [2023-12-02 12:40:47,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:40:47,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516732143] [2023-12-02 12:40:47,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:40:47,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:40:47,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:40:48,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1635 proven. 782 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2023-12-02 12:40:48,058 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:40:48,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516732143] [2023-12-02 12:40:48,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516732143] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:40:48,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119544041] [2023-12-02 12:40:48,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:40:48,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:40:48,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:40:48,059 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:40:48,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 12:40:48,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:40:48,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 12:40:48,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:40:48,961 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1635 proven. 782 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2023-12-02 12:40:48,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:40:50,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1635 proven. 782 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2023-12-02 12:40:50,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119544041] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:40:50,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1044588777] [2023-12-02 12:40:50,014 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-12-02 12:40:50,014 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:40:50,014 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:40:50,014 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:40:50,014 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:40:50,771 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:40:52,809 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4419#(and (= |ULTIMATE.start_main_#t~ret3#1| |ULTIMATE.start_foo_#res#1|) (or (< (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)) 0) (< (select |#length| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4) 4))) (exists ((|v_ULTIMATE.start_foo_~size#1_44| Int) (|v_ULTIMATE.start_foo_#in~size#1_41| Int)) (and (<= 32 |ULTIMATE.start_foo_#res#1|) (= |v_ULTIMATE.start_foo_~size#1_44| 32) (= 32 |v_ULTIMATE.start_foo_#in~size#1_41|))) (<= |ULTIMATE.start_main_#t~ret3#1| 2147483647))' at error location [2023-12-02 12:40:52,809 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:40:52,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:40:52,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 74 [2023-12-02 12:40:52,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258769770] [2023-12-02 12:40:52,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:40:52,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-12-02 12:40:52,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:40:52,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-12-02 12:40:52,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2196, Invalid=3810, Unknown=0, NotChecked=0, Total=6006 [2023-12-02 12:40:52,815 INFO L87 Difference]: Start difference. First operand 297 states and 304 transitions. Second operand has 74 states, 74 states have (on average 2.9864864864864864) internal successors, (221), 74 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:40:52,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:40:52,988 INFO L93 Difference]: Finished difference Result 405 states and 412 transitions. [2023-12-02 12:40:52,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-12-02 12:40:52,989 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.9864864864864864) internal successors, (221), 74 states have internal predecessors, (221), 0 states have call successors, (0), 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 145 [2023-12-02 12:40:52,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:40:52,991 INFO L225 Difference]: With dead ends: 405 [2023-12-02 12:40:52,991 INFO L226 Difference]: Without dead ends: 405 [2023-12-02 12:40:52,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 337 SyntacticMatches, 46 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5395 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2196, Invalid=3810, Unknown=0, NotChecked=0, Total=6006 [2023-12-02 12:40:52,994 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:40:52,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 29 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:40:52,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2023-12-02 12:40:53,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 405. [2023-12-02 12:40:53,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 403 states have (on average 1.022332506203474) internal successors, (412), 404 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:40:53,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 412 transitions. [2023-12-02 12:40:53,002 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 412 transitions. Word has length 145 [2023-12-02 12:40:53,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:40:53,002 INFO L495 AbstractCegarLoop]: Abstraction has 405 states and 412 transitions. [2023-12-02 12:40:53,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.9864864864864864) internal successors, (221), 74 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:40:53,002 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 412 transitions. [2023-12-02 12:40:53,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-12-02 12:40:53,005 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:40:53,005 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 2, 2, 1, 1, 1] [2023-12-02 12:40:53,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 12:40:53,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 12:40:53,206 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-12-02 12:40:53,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:40:53,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1095510878, now seen corresponding path program 2 times [2023-12-02 12:40:53,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:40:53,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508938734] [2023-12-02 12:40:53,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:40:53,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:40:53,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:40:53,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6179 backedges. 0 proven. 3139 refuted. 0 times theorem prover too weak. 3040 trivial. 0 not checked. [2023-12-02 12:40:53,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:40:53,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508938734] [2023-12-02 12:40:53,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508938734] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:40:53,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851278998] [2023-12-02 12:40:53,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:40:53,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:40:53,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:40:53,959 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:40:53,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 12:40:54,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 12:40:54,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:40:54,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 12:40:54,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:40:54,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:40:54,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-12-02 12:40:54,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 12:40:54,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6179 backedges. 0 proven. 3139 refuted. 0 times theorem prover too weak. 3040 trivial. 0 not checked. [2023-12-02 12:40:54,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:40:55,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6179 backedges. 0 proven. 3139 refuted. 0 times theorem prover too weak. 3040 trivial. 0 not checked. [2023-12-02 12:40:55,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851278998] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:40:55,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2023886320] [2023-12-02 12:40:55,721 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-12-02 12:40:55,721 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:40:55,721 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:40:55,721 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:40:55,721 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:40:56,447 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:40:57,524 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6430#(and (= |ULTIMATE.start_main_#t~ret3#1| |ULTIMATE.start_foo_#res#1|) (or (< (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)) 0) (< (select |#length| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4) 4))) (exists ((|v_ULTIMATE.start_foo_#in~size#1_49| Int) (|v_ULTIMATE.start_foo_~size#1_50| Int)) (and (<= 32 |ULTIMATE.start_foo_#res#1|) (= |v_ULTIMATE.start_foo_~size#1_50| 32) (= 32 |v_ULTIMATE.start_foo_#in~size#1_49|))) (<= |ULTIMATE.start_main_#t~ret3#1| 2147483647))' at error location [2023-12-02 12:40:57,524 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:40:57,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:40:57,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2023-12-02 12:40:57,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471422859] [2023-12-02 12:40:57,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:40:57,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 12:40:57,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:40:57,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 12:40:57,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-12-02 12:40:57,526 INFO L87 Difference]: Start difference. First operand 405 states and 412 transitions. Second operand has 9 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:40:57,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:40:57,617 INFO L93 Difference]: Finished difference Result 503 states and 509 transitions. [2023-12-02 12:40:57,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 12:40:57,617 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2023-12-02 12:40:57,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:40:57,620 INFO L225 Difference]: With dead ends: 503 [2023-12-02 12:40:57,621 INFO L226 Difference]: Without dead ends: 503 [2023-12-02 12:40:57,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 523 SyntacticMatches, 64 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-12-02 12:40:57,622 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 5 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:40:57,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 20 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:40:57,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2023-12-02 12:40:57,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 503. [2023-12-02 12:40:57,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 501 states have (on average 1.0159680638722555) internal successors, (509), 502 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:40:57,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 509 transitions. [2023-12-02 12:40:57,632 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 509 transitions. Word has length 199 [2023-12-02 12:40:57,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:40:57,633 INFO L495 AbstractCegarLoop]: Abstraction has 503 states and 509 transitions. [2023-12-02 12:40:57,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:40:57,633 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 509 transitions. [2023-12-02 12:40:57,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2023-12-02 12:40:57,639 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:40:57,639 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 128, 4, 4, 4, 2, 1, 1, 1, 1, 1] [2023-12-02 12:40:57,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 12:40:57,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 12:40:57,840 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-12-02 12:40:57,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:40:57,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1155790371, now seen corresponding path program 3 times [2023-12-02 12:40:57,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:40:57,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996502396] [2023-12-02 12:40:57,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:40:57,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:40:58,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:40:58,628 INFO L134 CoverageAnalysis]: Checked inductivity of 24920 backedges. 0 proven. 18838 refuted. 0 times theorem prover too weak. 6082 trivial. 0 not checked. [2023-12-02 12:40:58,629 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:40:58,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996502396] [2023-12-02 12:40:58,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996502396] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:40:58,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297661628] [2023-12-02 12:40:58,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 12:40:58,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:40:58,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:40:58,630 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:40:58,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 12:41:02,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 12:41:02,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:41:02,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 1598 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 12:41:02,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:41:02,668 INFO L134 CoverageAnalysis]: Checked inductivity of 24920 backedges. 0 proven. 19251 refuted. 0 times theorem prover too weak. 5669 trivial. 0 not checked. [2023-12-02 12:41:02,668 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:41:03,370 INFO L134 CoverageAnalysis]: Checked inductivity of 24920 backedges. 387 proven. 18864 refuted. 0 times theorem prover too weak. 5669 trivial. 0 not checked. [2023-12-02 12:41:03,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297661628] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:41:03,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1259031449] [2023-12-02 12:41:03,372 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-12-02 12:41:03,372 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:41:03,372 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:41:03,372 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:41:03,372 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:41:04,103 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:41:07,481 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9881#(and (<= (mod |ULTIMATE.start_main_~i~1#1| 4294967296) 31) (<= 0 |ULTIMATE.start_main_~i~1#1|) (or (< (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)) 0) (< (select |#length| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4) 4))))' at error location [2023-12-02 12:41:07,481 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:41:07,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:41:07,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11, 11] total 22 [2023-12-02 12:41:07,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552063312] [2023-12-02 12:41:07,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:41:07,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-02 12:41:07,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:41:07,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-02 12:41:07,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=652, Unknown=0, NotChecked=0, Total=870 [2023-12-02 12:41:07,485 INFO L87 Difference]: Start difference. First operand 503 states and 509 transitions. Second operand has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:41:08,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:41:08,086 INFO L93 Difference]: Finished difference Result 1038 states and 1049 transitions. [2023-12-02 12:41:08,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-02 12:41:08,086 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 403 [2023-12-02 12:41:08,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:41:08,091 INFO L225 Difference]: With dead ends: 1038 [2023-12-02 12:41:08,091 INFO L226 Difference]: Without dead ends: 1038 [2023-12-02 12:41:08,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1217 GetRequests, 1057 SyntacticMatches, 128 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2635 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=295, Invalid=827, Unknown=0, NotChecked=0, Total=1122 [2023-12-02 12:41:08,092 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 159 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:41:08,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 50 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 12:41:08,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2023-12-02 12:41:08,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 999. [2023-12-02 12:41:08,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 999 states, 997 states have (on average 1.0180541624874624) internal successors, (1015), 998 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:41:08,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 1015 transitions. [2023-12-02 12:41:08,112 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 1015 transitions. Word has length 403 [2023-12-02 12:41:08,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:41:08,113 INFO L495 AbstractCegarLoop]: Abstraction has 999 states and 1015 transitions. [2023-12-02 12:41:08,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:41:08,113 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 1015 transitions. [2023-12-02 12:41:08,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2023-12-02 12:41:08,126 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:41:08,127 INFO L195 NwaCegarLoop]: trace histogram [160, 160, 160, 5, 5, 4, 1, 1] [2023-12-02 12:41:08,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-02 12:41:08,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 12:41:08,327 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-12-02 12:41:08,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:41:08,328 INFO L85 PathProgramCache]: Analyzing trace with hash -5393295, now seen corresponding path program 3 times [2023-12-02 12:41:08,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:41:08,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165739985] [2023-12-02 12:41:08,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:08,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:41:08,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:10,292 INFO L134 CoverageAnalysis]: Checked inductivity of 38990 backedges. 0 proven. 31390 refuted. 0 times theorem prover too weak. 7600 trivial. 0 not checked. [2023-12-02 12:41:10,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:41:10,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165739985] [2023-12-02 12:41:10,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165739985] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:41:10,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590078282] [2023-12-02 12:41:10,292 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 12:41:10,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:41:10,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:41:10,293 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:41:10,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 12:41:14,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 12:41:14,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:41:14,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 1961 conjuncts, 56 conjunts are in the unsatisfiable core [2023-12-02 12:41:14,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:41:14,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 12:41:14,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 12:41:20,104 INFO L134 CoverageAnalysis]: Checked inductivity of 38990 backedges. 1395 proven. 31514 refuted. 0 times theorem prover too weak. 6081 trivial. 0 not checked. [2023-12-02 12:41:20,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:41:24,489 INFO L134 CoverageAnalysis]: Checked inductivity of 38990 backedges. 1519 proven. 31390 refuted. 0 times theorem prover too weak. 6081 trivial. 0 not checked. [2023-12-02 12:41:24,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590078282] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:41:24,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1175714772] [2023-12-02 12:41:24,491 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-12-02 12:41:24,491 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:41:24,491 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:41:24,491 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:41:24,491 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:41:25,190 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:41:38,908 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14985#(and (= |ULTIMATE.start_main_#t~ret3#1| |ULTIMATE.start_foo_#res#1|) (or (< (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)) 0) (< (select |#length| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4) 4))) (exists ((|v_ULTIMATE.start_foo_~size#1_67| Int) (|v_ULTIMATE.start_foo_#in~size#1_75| Int)) (and (<= 32 |ULTIMATE.start_foo_#res#1|) (= |v_ULTIMATE.start_foo_~size#1_67| 32) (= 32 |v_ULTIMATE.start_foo_#in~size#1_75|))) (<= |ULTIMATE.start_main_#t~ret3#1| 2147483647))' at error location [2023-12-02 12:41:38,908 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:41:38,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:41:38,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 37, 37] total 80 [2023-12-02 12:41:38,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712750594] [2023-12-02 12:41:38,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:41:38,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2023-12-02 12:41:38,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:41:38,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2023-12-02 12:41:38,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2243, Invalid=5067, Unknown=0, NotChecked=0, Total=7310 [2023-12-02 12:41:38,915 INFO L87 Difference]: Start difference. First operand 999 states and 1015 transitions. Second operand has 82 states, 81 states have (on average 3.4444444444444446) internal successors, (279), 81 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:41:43,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:41:43,891 INFO L93 Difference]: Finished difference Result 1097 states and 1109 transitions. [2023-12-02 12:41:43,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-12-02 12:41:43,892 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 3.4444444444444446) internal successors, (279), 81 states have internal predecessors, (279), 0 states have call successors, (0), 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 496 [2023-12-02 12:41:43,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:41:43,896 INFO L225 Difference]: With dead ends: 1097 [2023-12-02 12:41:43,896 INFO L226 Difference]: Without dead ends: 1097 [2023-12-02 12:41:43,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1564 GetRequests, 1248 SyntacticMatches, 160 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18083 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=7769, Invalid=17037, Unknown=0, NotChecked=0, Total=24806 [2023-12-02 12:41:43,902 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 2074 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 2080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 2074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:41:43,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 100 Invalid, 2080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 2074 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-02 12:41:43,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2023-12-02 12:41:43,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 1097. [2023-12-02 12:41:43,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 1095 states have (on average 1.012785388127854) internal successors, (1109), 1096 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:41:43,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1109 transitions. [2023-12-02 12:41:43,917 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1109 transitions. Word has length 496 [2023-12-02 12:41:43,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:41:43,918 INFO L495 AbstractCegarLoop]: Abstraction has 1097 states and 1109 transitions. [2023-12-02 12:41:43,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 3.4444444444444446) internal successors, (279), 81 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:41:43,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1109 transitions. [2023-12-02 12:41:43,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 998 [2023-12-02 12:41:43,925 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:41:43,925 INFO L195 NwaCegarLoop]: trace histogram [320, 320, 320, 10, 10, 10, 2, 1, 1, 1, 1, 1] [2023-12-02 12:41:43,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 12:41:44,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 12:41:44,126 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-12-02 12:41:44,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:41:44,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1763792771, now seen corresponding path program 4 times [2023-12-02 12:41:44,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:41:44,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492117007] [2023-12-02 12:41:44,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:44,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:41:44,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:46,521 INFO L134 CoverageAnalysis]: Checked inductivity of 156467 backedges. 0 proven. 141265 refuted. 0 times theorem prover too weak. 15202 trivial. 0 not checked. [2023-12-02 12:41:46,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:41:46,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492117007] [2023-12-02 12:41:46,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492117007] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:41:46,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264857175] [2023-12-02 12:41:46,522 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 12:41:46,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:41:46,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:41:46,522 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:41:46,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 12:41:47,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:47,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 3926 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 12:41:47,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:41:49,715 INFO L134 CoverageAnalysis]: Checked inductivity of 156467 backedges. 141255 proven. 12 refuted. 0 times theorem prover too weak. 15200 trivial. 0 not checked. [2023-12-02 12:41:49,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:41:49,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-12-02 12:41:52,516 INFO L134 CoverageAnalysis]: Checked inductivity of 156467 backedges. 141255 proven. 12 refuted. 0 times theorem prover too weak. 15200 trivial. 0 not checked. [2023-12-02 12:41:52,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264857175] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:41:52,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [203900331] [2023-12-02 12:41:52,518 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-12-02 12:41:52,518 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:41:52,519 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:41:52,519 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:41:52,519 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:41:53,275 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:42:06,214 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23342#(and (<= (mod |ULTIMATE.start_main_~i~1#1| 4294967296) 31) (<= 0 |ULTIMATE.start_main_~i~1#1|) (or (< (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)) 0) (< (select |#length| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4) 4))))' at error location [2023-12-02 12:42:06,214 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:42:06,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:42:06,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 38 [2023-12-02 12:42:06,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797627118] [2023-12-02 12:42:06,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:42:06,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-12-02 12:42:06,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:42:06,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-12-02 12:42:06,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=1702, Unknown=0, NotChecked=0, Total=2070 [2023-12-02 12:42:06,219 INFO L87 Difference]: Start difference. First operand 1097 states and 1109 transitions. Second operand has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 38 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:42:06,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:42:06,866 INFO L93 Difference]: Finished difference Result 1229 states and 1242 transitions. [2023-12-02 12:42:06,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 12:42:06,867 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 38 states have internal predecessors, (200), 0 states have call successors, (0), 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 997 [2023-12-02 12:42:06,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:42:06,873 INFO L225 Difference]: With dead ends: 1229 [2023-12-02 12:42:06,873 INFO L226 Difference]: Without dead ends: 1229 [2023-12-02 12:42:06,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3013 GetRequests, 2637 SyntacticMatches, 320 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8628 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=694, Invalid=2612, Unknown=0, NotChecked=0, Total=3306 [2023-12-02 12:42:06,874 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 392 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:42:06,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [392 Valid, 248 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 12:42:06,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2023-12-02 12:42:06,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 1125. [2023-12-02 12:42:06,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1123 states have (on average 1.01246660730187) internal successors, (1137), 1124 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:42:06,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 1137 transitions. [2023-12-02 12:42:06,897 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 1137 transitions. Word has length 997 [2023-12-02 12:42:06,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:42:06,898 INFO L495 AbstractCegarLoop]: Abstraction has 1125 states and 1137 transitions. [2023-12-02 12:42:06,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 5.128205128205129) internal successors, (200), 38 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:42:06,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 1137 transitions. [2023-12-02 12:42:06,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1091 [2023-12-02 12:42:06,910 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:42:06,910 INFO L195 NwaCegarLoop]: trace histogram [352, 352, 352, 11, 11, 10, 1, 1] [2023-12-02 12:42:06,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 12:42:07,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:42:07,111 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-12-02 12:42:07,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:42:07,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1681084177, now seen corresponding path program 4 times [2023-12-02 12:42:07,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:42:07,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542829643] [2023-12-02 12:42:07,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:42:07,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:42:07,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:42:11,022 INFO L134 CoverageAnalysis]: Checked inductivity of 189365 backedges. 0 proven. 172645 refuted. 0 times theorem prover too weak. 16720 trivial. 0 not checked. [2023-12-02 12:42:11,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:42:11,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542829643] [2023-12-02 12:42:11,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542829643] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:42:11,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843252896] [2023-12-02 12:42:11,022 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 12:42:11,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:42:11,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:42:11,024 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:42:11,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 12:42:11,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:42:11,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 4289 conjuncts, 37 conjunts are in the unsatisfiable core [2023-12-02 12:42:11,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:42:11,949 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 [2023-12-02 12:42:11,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 12:42:16,473 INFO L134 CoverageAnalysis]: Checked inductivity of 189365 backedges. 0 proven. 172645 refuted. 0 times theorem prover too weak. 16720 trivial. 0 not checked. [2023-12-02 12:42:16,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:42:20,445 INFO L134 CoverageAnalysis]: Checked inductivity of 189365 backedges. 0 proven. 172645 refuted. 0 times theorem prover too weak. 16720 trivial. 0 not checked. [2023-12-02 12:42:20,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843252896] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:42:20,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1349306008] [2023-12-02 12:42:20,447 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-12-02 12:42:20,447 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:42:20,447 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:42:20,448 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:42:20,448 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:42:21,316 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:42:38,567 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '32298#(and (= |ULTIMATE.start_main_#t~ret3#1| |ULTIMATE.start_foo_#res#1|) (or (< (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)) 0) (< (select |#length| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4) 4))) (exists ((|v_ULTIMATE.start_foo_~size#1_96| Int) (|v_ULTIMATE.start_foo_#in~size#1_125| Int)) (and (<= 32 |ULTIMATE.start_foo_#res#1|) (= |v_ULTIMATE.start_foo_~size#1_96| 32) (= |v_ULTIMATE.start_foo_#in~size#1_125| 32))) (<= |ULTIMATE.start_main_#t~ret3#1| 2147483647))' at error location [2023-12-02 12:42:38,568 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:42:38,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:42:38,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 35 [2023-12-02 12:42:38,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337322733] [2023-12-02 12:42:38,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:42:38,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-02 12:42:38,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:42:38,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-02 12:42:38,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=1293, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 12:42:38,572 INFO L87 Difference]: Start difference. First operand 1125 states and 1137 transitions. Second operand has 37 states, 36 states have (on average 5.583333333333333) internal successors, (201), 36 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:42:39,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:42:39,825 INFO L93 Difference]: Finished difference Result 2312 states and 2347 transitions. [2023-12-02 12:42:39,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 12:42:39,825 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 5.583333333333333) internal successors, (201), 36 states have internal predecessors, (201), 0 states have call successors, (0), 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 1090 [2023-12-02 12:42:39,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:42:39,837 INFO L225 Difference]: With dead ends: 2312 [2023-12-02 12:42:39,837 INFO L226 Difference]: Without dead ends: 2312 [2023-12-02 12:42:39,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3301 GetRequests, 2889 SyntacticMatches, 352 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5312 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=994, Invalid=2788, Unknown=0, NotChecked=0, Total=3782 [2023-12-02 12:42:39,838 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 10 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 1140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 12:42:39,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 528 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1140 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 12:42:39,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2312 states. [2023-12-02 12:42:39,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2312 to 2312. [2023-12-02 12:42:39,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2312 states, 2310 states have (on average 1.016017316017316) internal successors, (2347), 2311 states have internal predecessors, (2347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:42:39,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 2347 transitions. [2023-12-02 12:42:39,881 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 2347 transitions. Word has length 1090 [2023-12-02 12:42:39,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:42:39,883 INFO L495 AbstractCegarLoop]: Abstraction has 2312 states and 2347 transitions. [2023-12-02 12:42:39,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 5.583333333333333) internal successors, (201), 36 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:42:39,883 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 2347 transitions. [2023-12-02 12:42:39,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1124 [2023-12-02 12:42:39,895 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:42:39,896 INFO L195 NwaCegarLoop]: trace histogram [352, 352, 352, 11, 11, 11, 11, 10, 10, 1, 1, 1] [2023-12-02 12:42:39,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-02 12:42:40,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:42:40,096 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-12-02 12:42:40,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:42:40,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1652597412, now seen corresponding path program 5 times [2023-12-02 12:42:40,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:42:40,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365528422] [2023-12-02 12:42:40,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:42:40,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:42:40,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:42:42,611 INFO L134 CoverageAnalysis]: Checked inductivity of 189531 backedges. 0 proven. 172656 refuted. 0 times theorem prover too weak. 16875 trivial. 0 not checked. [2023-12-02 12:42:42,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:42:42,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365528422] [2023-12-02 12:42:42,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365528422] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:42:42,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168723514] [2023-12-02 12:42:42,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:42:42,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:42:42,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:42:42,612 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:42:42,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 12:42:42,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 12:42:42,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:42:42,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 12:42:42,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:42:42,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:42:42,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-12-02 12:42:42,966 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 [2023-12-02 12:42:46,098 INFO L134 CoverageAnalysis]: Checked inductivity of 189531 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 189502 trivial. 0 not checked. [2023-12-02 12:42:46,098 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:42:46,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168723514] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:42:46,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:42:46,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 17 [2023-12-02 12:42:46,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4768678] [2023-12-02 12:42:46,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:42:46,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:42:46,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:42:46,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:42:46,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2023-12-02 12:42:46,100 INFO L87 Difference]: Start difference. First operand 2312 states and 2347 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:42:46,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:42:46,148 INFO L93 Difference]: Finished difference Result 2310 states and 2345 transitions. [2023-12-02 12:42:46,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 12:42:46,149 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1123 [2023-12-02 12:42:46,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:42:46,151 INFO L225 Difference]: With dead ends: 2310 [2023-12-02 12:42:46,151 INFO L226 Difference]: Without dead ends: 0 [2023-12-02 12:42:46,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1136 GetRequests, 1119 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2023-12-02 12:42:46,152 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 17 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:42:46,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 6 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:42:46,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-02 12:42:46,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-02 12:42:46,153 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) [2023-12-02 12:42:46,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-02 12:42:46,153 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1123 [2023-12-02 12:42:46,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:42:46,154 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-02 12:42:46,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:42:46,154 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-02 12:42:46,154 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-02 12:42:46,156 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX (7 of 8 remaining) [2023-12-02 12:42:46,157 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 8 remaining) [2023-12-02 12:42:46,157 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2023-12-02 12:42:46,157 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2023-12-02 12:42:46,157 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 8 remaining) [2023-12-02 12:42:46,157 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 8 remaining) [2023-12-02 12:42:46,158 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 8 remaining) [2023-12-02 12:42:46,158 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2023-12-02 12:42:46,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 12:42:46,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:42:46,360 INFO L445 BasicCegarLoop]: Path program histogram: [5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:42:46,362 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 12:42:46,365 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 12:42:46 BoogieIcfgContainer [2023-12-02 12:42:46,365 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 12:42:46,366 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 12:42:46,366 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 12:42:46,366 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 12:42:46,366 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:40:25" (3/4) ... [2023-12-02 12:42:46,368 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-12-02 12:42:46,375 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2023-12-02 12:42:46,376 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2023-12-02 12:42:46,376 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-12-02 12:42:46,376 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-12-02 12:42:46,456 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/witness.graphml [2023-12-02 12:42:46,458 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/witness.yml [2023-12-02 12:42:46,458 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 12:42:46,459 INFO L158 Benchmark]: Toolchain (without parser) took 141236.44ms. Allocated memory was 155.2MB in the beginning and 1.0GB in the end (delta: 880.8MB). Free memory was 109.1MB in the beginning and 706.1MB in the end (delta: -597.0MB). Peak memory consumption was 286.6MB. Max. memory is 16.1GB. [2023-12-02 12:42:46,459 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 104.9MB. Free memory is still 47.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 12:42:46,459 INFO L158 Benchmark]: CACSL2BoogieTranslator took 259.85ms. Allocated memory is still 155.2MB. Free memory was 108.8MB in the beginning and 99.0MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-12-02 12:42:46,460 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.29ms. Allocated memory is still 155.2MB. Free memory was 99.0MB in the beginning and 97.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 12:42:46,460 INFO L158 Benchmark]: Boogie Preprocessor took 29.32ms. Allocated memory is still 155.2MB. Free memory was 97.3MB in the beginning and 96.2MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 12:42:46,460 INFO L158 Benchmark]: RCFGBuilder took 397.74ms. Allocated memory is still 155.2MB. Free memory was 96.2MB in the beginning and 123.4MB in the end (delta: -27.2MB). Peak memory consumption was 19.5MB. Max. memory is 16.1GB. [2023-12-02 12:42:46,461 INFO L158 Benchmark]: TraceAbstraction took 140400.06ms. Allocated memory was 197.1MB in the beginning and 1.0GB in the end (delta: 838.9MB). Free memory was 167.6MB in the beginning and 711.4MB in the end (delta: -543.8MB). Peak memory consumption was 296.3MB. Max. memory is 16.1GB. [2023-12-02 12:42:46,461 INFO L158 Benchmark]: Witness Printer took 92.46ms. Allocated memory is still 1.0GB. Free memory was 711.4MB in the beginning and 706.1MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-12-02 12:42:46,463 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 104.9MB. Free memory is still 47.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 259.85ms. Allocated memory is still 155.2MB. Free memory was 108.8MB in the beginning and 99.0MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.29ms. Allocated memory is still 155.2MB. Free memory was 99.0MB in the beginning and 97.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.32ms. Allocated memory is still 155.2MB. Free memory was 97.3MB in the beginning and 96.2MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 397.74ms. Allocated memory is still 155.2MB. Free memory was 96.2MB in the beginning and 123.4MB in the end (delta: -27.2MB). Peak memory consumption was 19.5MB. Max. memory is 16.1GB. * TraceAbstraction took 140400.06ms. Allocated memory was 197.1MB in the beginning and 1.0GB in the end (delta: 838.9MB). Free memory was 167.6MB in the beginning and 711.4MB in the end (delta: -543.8MB). Peak memory consumption was 296.3MB. Max. memory is 16.1GB. * Witness Printer took 92.46ms. Allocated memory is still 1.0GB. Free memory was 711.4MB in the beginning and 706.1MB 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: 16]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 8 error locations. Started 1 CEGAR loops. OverallTime: 140.3s, OverallIterations: 21, TraceHistogramMax: 352, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.1s, AutomataDifference: 12.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 5 mSolverCounterUnknown, 1269 SdHoareTripleChecker+Valid, 3.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1269 mSDsluCounter, 1148 SdHoareTripleChecker+Invalid, 3.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 989 mSDsCounter, 163 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5858 IncrementalHoareTripleChecker+Invalid, 6026 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 163 mSolverCounterUnsat, 159 mSDtfsCounter, 5858 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 12058 GetRequests, 10241 SyntacticMatches, 1116 SemanticMatches, 701 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46950 ImplicationChecksByTransitivity, 70.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2312occurred in iteration=20, InterpolantAutomatonStates: 374, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 21 MinimizatonAttempts, 202 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.8s SsaConstructionTime, 10.7s SatisfiabilityAnalysisTime, 47.3s InterpolantComputationTime, 9374 NumberOfCodeBlocks, 7964 NumberOfCodeBlocksAsserted, 42 NumberOfCheckSat, 12834 ConstructedInterpolants, 38 QuantifiedInterpolants, 137503 SizeOfPredicates, 38 NumberOfNonLiveVariables, 13281 ConjunctsInSsa, 278 ConjunctsInUnsatCore, 49 InterpolantComputations, 8 PerfectInterpolantSequences, 643175/1639497 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 0.8s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 4, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 14, TOOLS_POST_TIME: 0.7s, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 14, TOOLS_QUANTIFIERELIM_TIME: 0.7s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 28, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 0, DOMAIN_JOIN_TIME: 0.0s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME: 0.1s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 3, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 4, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME: 0.6s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.6s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 3, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 34, DAG_COMPRESSION_RETAINED_NODES: 20, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-12-02 12:42:46,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f84a9ee7-0695-4285-adaa-bff6ff61da8e/bin/utaipan-verify-nQ1chXbOIh/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