./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-broom/sll-nested-sll-twice.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/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_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-broom/sll-nested-sll-twice.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/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 64bit --witnessprinter.graph.data.programhash f6ffaa15235a1424658c74c69505398b6d7973f6f82933a9f22a2b097e3c0057 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 12:22:28,888 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 12:22:28,954 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2023-12-02 12:22:28,958 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 12:22:28,959 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 12:22:28,984 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 12:22:28,985 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 12:22:28,985 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 12:22:28,986 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 12:22:28,987 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 12:22:28,987 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 12:22:28,988 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 12:22:28,988 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 12:22:28,989 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 12:22:28,989 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 12:22:28,990 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 12:22:28,990 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 12:22:28,991 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 12:22:28,991 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 12:22:28,992 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 12:22:28,992 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 12:22:28,993 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 12:22:28,994 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 12:22:28,995 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 12:22:28,995 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 12:22:28,996 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 12:22:28,996 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 12:22:28,996 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 12:22:28,997 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 12:22:28,997 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 12:22:28,998 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 12:22:28,998 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 12:22:28,998 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 12:22:28,999 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 12:22:28,999 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 12:22:28,999 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 12:22:29,000 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 12:22:29,000 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:22:29,000 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 12:22:29,000 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 12:22:29,001 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 12:22:29,001 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 12:22:29,001 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 12:22:29,002 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 12:22:29,002 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 12:22:29,002 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_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f6ffaa15235a1424658c74c69505398b6d7973f6f82933a9f22a2b097e3c0057 [2023-12-02 12:22:29,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 12:22:29,250 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 12:22:29,253 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 12:22:29,254 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 12:22:29,255 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 12:22:29,256 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/memsafety-broom/sll-nested-sll-twice.i [2023-12-02 12:22:32,094 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 12:22:32,359 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 12:22:32,360 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/sv-benchmarks/c/memsafety-broom/sll-nested-sll-twice.i [2023-12-02 12:22:32,387 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh/data/33792c23c/8272ed0662a347f08a035b6185bd852a/FLAG4c6f1f92f [2023-12-02 12:22:32,398 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh/data/33792c23c/8272ed0662a347f08a035b6185bd852a [2023-12-02 12:22:32,401 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 12:22:32,402 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 12:22:32,404 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 12:22:32,404 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 12:22:32,408 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 12:22:32,408 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:22:32" (1/1) ... [2023-12-02 12:22:32,409 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55e81684 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:32, skipping insertion in model container [2023-12-02 12:22:32,409 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:22:32" (1/1) ... [2023-12-02 12:22:32,470 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 12:22:32,729 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:22:32,738 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 12:22:32,781 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:22:32,814 INFO L206 MainTranslator]: Completed translation [2023-12-02 12:22:32,814 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:32 WrapperNode [2023-12-02 12:22:32,815 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 12:22:32,816 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 12:22:32,816 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 12:22:32,816 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 12:22:32,822 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:32" (1/1) ... [2023-12-02 12:22:32,834 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:32" (1/1) ... [2023-12-02 12:22:32,858 INFO L138 Inliner]: procedures = 122, calls = 43, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 81 [2023-12-02 12:22:32,858 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 12:22:32,859 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 12:22:32,859 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 12:22:32,859 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 12:22:32,870 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:32" (1/1) ... [2023-12-02 12:22:32,870 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:32" (1/1) ... [2023-12-02 12:22:32,875 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:32" (1/1) ... [2023-12-02 12:22:32,875 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:32" (1/1) ... [2023-12-02 12:22:32,886 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:32" (1/1) ... [2023-12-02 12:22:32,890 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:32" (1/1) ... [2023-12-02 12:22:32,892 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:32" (1/1) ... [2023-12-02 12:22:32,894 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:32" (1/1) ... [2023-12-02 12:22:32,897 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 12:22:32,898 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 12:22:32,898 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 12:22:32,899 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 12:22:32,899 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:32" (1/1) ... [2023-12-02 12:22:32,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:22:32,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:22:32,929 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 12:22:32,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 12:22:32,960 INFO L130 BoogieDeclarations]: Found specification of procedure loop_internal [2023-12-02 12:22:32,960 INFO L138 BoogieDeclarations]: Found implementation of procedure loop_internal [2023-12-02 12:22:32,960 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero_internal [2023-12-02 12:22:32,960 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero_internal [2023-12-02 12:22:32,960 INFO L130 BoogieDeclarations]: Found specification of procedure create_internal [2023-12-02 12:22:32,961 INFO L138 BoogieDeclarations]: Found implementation of procedure create_internal [2023-12-02 12:22:32,961 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero [2023-12-02 12:22:32,961 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero [2023-12-02 12:22:32,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 12:22:32,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 12:22:32,961 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_internal [2023-12-02 12:22:32,962 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_internal [2023-12-02 12:22:32,962 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 12:22:32,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 12:22:32,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 12:22:32,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 12:22:33,088 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 12:22:33,090 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 12:22:33,404 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 12:22:33,466 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 12:22:33,466 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-12-02 12:22:33,468 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:22:33 BoogieIcfgContainer [2023-12-02 12:22:33,468 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 12:22:33,471 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 12:22:33,471 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 12:22:33,475 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 12:22:33,475 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:22:32" (1/3) ... [2023-12-02 12:22:33,476 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@485bcac6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:22:33, skipping insertion in model container [2023-12-02 12:22:33,476 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:32" (2/3) ... [2023-12-02 12:22:33,476 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@485bcac6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:22:33, skipping insertion in model container [2023-12-02 12:22:33,477 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:22:33" (3/3) ... [2023-12-02 12:22:33,478 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-nested-sll-twice.i [2023-12-02 12:22:33,496 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 12:22:33,496 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 51 error locations. [2023-12-02 12:22:33,543 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 12:22:33,551 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;@465cd868, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 12:22:33,551 INFO L358 AbstractCegarLoop]: Starting to check reachability of 51 error locations. [2023-12-02 12:22:33,555 INFO L276 IsEmpty]: Start isEmpty. Operand has 119 states, 50 states have (on average 2.18) internal successors, (109), 101 states have internal predecessors, (109), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 12:22:33,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 12:22:33,560 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:22:33,561 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 12:22:33,561 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-12-02 12:22:33,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:22:33,565 INFO L85 PathProgramCache]: Analyzing trace with hash 8271905, now seen corresponding path program 1 times [2023-12-02 12:22:33,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:22:33,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722398745] [2023-12-02 12:22:33,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:33,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:22:33,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:33,790 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 12:22:33,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:22:33,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722398745] [2023-12-02 12:22:33,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722398745] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:22:33,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:22:33,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 12:22:33,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332442527] [2023-12-02 12:22:33,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:22:33,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:22:33,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:22:33,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:22:33,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:22:33,832 INFO L87 Difference]: Start difference. First operand has 119 states, 50 states have (on average 2.18) internal successors, (109), 101 states have internal predecessors, (109), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:22:33,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:22:33,983 INFO L93 Difference]: Finished difference Result 116 states and 128 transitions. [2023-12-02 12:22:33,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:22:33,986 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 12:22:33,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:22:33,994 INFO L225 Difference]: With dead ends: 116 [2023-12-02 12:22:33,995 INFO L226 Difference]: Without dead ends: 115 [2023-12-02 12:22:33,996 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 12:22:34,000 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 6 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:22:34,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 168 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:22:34,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-12-02 12:22:34,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2023-12-02 12:22:34,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 50 states have (on average 2.06) internal successors, (103), 97 states have internal predecessors, (103), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 12:22:34,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 127 transitions. [2023-12-02 12:22:34,047 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 127 transitions. Word has length 4 [2023-12-02 12:22:34,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:22:34,047 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 127 transitions. [2023-12-02 12:22:34,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:22:34,048 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 127 transitions. [2023-12-02 12:22:34,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 12:22:34,048 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:22:34,048 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 12:22:34,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 12:22:34,049 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-12-02 12:22:34,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:22:34,050 INFO L85 PathProgramCache]: Analyzing trace with hash 8271906, now seen corresponding path program 1 times [2023-12-02 12:22:34,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:22:34,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158307105] [2023-12-02 12:22:34,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:34,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:22:34,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:34,142 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 12:22:34,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:22:34,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158307105] [2023-12-02 12:22:34,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158307105] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:22:34,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:22:34,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 12:22:34,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966282200] [2023-12-02 12:22:34,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:22:34,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:22:34,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:22:34,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:22:34,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:22:34,146 INFO L87 Difference]: Start difference. First operand 115 states and 127 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:22:34,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:22:34,248 INFO L93 Difference]: Finished difference Result 112 states and 124 transitions. [2023-12-02 12:22:34,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:22:34,248 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 12:22:34,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:22:34,250 INFO L225 Difference]: With dead ends: 112 [2023-12-02 12:22:34,250 INFO L226 Difference]: Without dead ends: 112 [2023-12-02 12:22:34,251 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 12:22:34,252 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 3 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:22:34,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 173 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:22:34,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-12-02 12:22:34,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2023-12-02 12:22:34,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 50 states have (on average 2.0) internal successors, (100), 94 states have internal predecessors, (100), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 12:22:34,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 124 transitions. [2023-12-02 12:22:34,267 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 124 transitions. Word has length 4 [2023-12-02 12:22:34,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:22:34,267 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 124 transitions. [2023-12-02 12:22:34,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:22:34,268 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 124 transitions. [2023-12-02 12:22:34,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 12:22:34,268 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:22:34,269 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:22:34,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 12:22:34,269 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting alloc_and_zero_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-12-02 12:22:34,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:22:34,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1691344441, now seen corresponding path program 1 times [2023-12-02 12:22:34,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:22:34,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147488311] [2023-12-02 12:22:34,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:34,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:22:34,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:34,381 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 12:22:34,381 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:22:34,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147488311] [2023-12-02 12:22:34,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147488311] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:22:34,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:22:34,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 12:22:34,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643955848] [2023-12-02 12:22:34,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:22:34,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:22:34,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:22:34,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:22:34,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:22:34,385 INFO L87 Difference]: Start difference. First operand 112 states and 124 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 12:22:34,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:22:34,477 INFO L93 Difference]: Finished difference Result 111 states and 123 transitions. [2023-12-02 12:22:34,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:22:34,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-12-02 12:22:34,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:22:34,479 INFO L225 Difference]: With dead ends: 111 [2023-12-02 12:22:34,479 INFO L226 Difference]: Without dead ends: 111 [2023-12-02 12:22:34,480 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 12:22:34,481 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 2 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:22:34,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 167 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:22:34,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-12-02 12:22:34,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2023-12-02 12:22:34,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 50 states have (on average 1.98) internal successors, (99), 93 states have internal predecessors, (99), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 12:22:34,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2023-12-02 12:22:34,492 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 12 [2023-12-02 12:22:34,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:22:34,494 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2023-12-02 12:22:34,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 12:22:34,494 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2023-12-02 12:22:34,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 12:22:34,495 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:22:34,495 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:22:34,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 12:22:34,496 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting alloc_and_zero_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-12-02 12:22:34,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:22:34,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1691344442, now seen corresponding path program 1 times [2023-12-02 12:22:34,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:22:34,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618549456] [2023-12-02 12:22:34,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:34,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:22:34,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:34,595 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 12:22:34,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:22:34,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618549456] [2023-12-02 12:22:34,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618549456] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:22:34,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:22:34,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 12:22:34,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002890544] [2023-12-02 12:22:34,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:22:34,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:22:34,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:22:34,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:22:34,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:22:34,598 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 12:22:34,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:22:34,688 INFO L93 Difference]: Finished difference Result 110 states and 122 transitions. [2023-12-02 12:22:34,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:22:34,688 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-12-02 12:22:34,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:22:34,690 INFO L225 Difference]: With dead ends: 110 [2023-12-02 12:22:34,690 INFO L226 Difference]: Without dead ends: 110 [2023-12-02 12:22:34,690 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 12:22:34,692 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 1 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:22:34,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 172 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:22:34,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-12-02 12:22:34,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2023-12-02 12:22:34,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 50 states have (on average 1.96) internal successors, (98), 92 states have internal predecessors, (98), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 12:22:34,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 122 transitions. [2023-12-02 12:22:34,703 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 122 transitions. Word has length 12 [2023-12-02 12:22:34,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:22:34,703 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 122 transitions. [2023-12-02 12:22:34,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 12:22:34,704 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 122 transitions. [2023-12-02 12:22:34,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 12:22:34,705 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:22:34,705 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:22:34,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 12:22:34,705 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-12-02 12:22:34,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:22:34,706 INFO L85 PathProgramCache]: Analyzing trace with hash -2072795497, now seen corresponding path program 1 times [2023-12-02 12:22:34,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:22:34,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681620947] [2023-12-02 12:22:34,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:34,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:22:34,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:34,949 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 12:22:34,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:22:34,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681620947] [2023-12-02 12:22:34,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681620947] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:22:34,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:22:34,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 12:22:34,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257624679] [2023-12-02 12:22:34,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:22:34,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 12:22:34,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:22:34,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 12:22:34,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-12-02 12:22:34,954 INFO L87 Difference]: Start difference. First operand 110 states and 122 transitions. Second operand has 9 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 12:22:35,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:22:35,490 INFO L93 Difference]: Finished difference Result 145 states and 166 transitions. [2023-12-02 12:22:35,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 12:22:35,491 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 19 [2023-12-02 12:22:35,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:22:35,493 INFO L225 Difference]: With dead ends: 145 [2023-12-02 12:22:35,494 INFO L226 Difference]: Without dead ends: 145 [2023-12-02 12:22:35,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-12-02 12:22:35,495 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 60 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:22:35,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 296 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 12:22:35,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-12-02 12:22:35,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 123. [2023-12-02 12:22:35,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 62 states have (on average 1.935483870967742) internal successors, (120), 100 states have internal predecessors, (120), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (17), 17 states have call predecessors, (17), 13 states have call successors, (17) [2023-12-02 12:22:35,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 150 transitions. [2023-12-02 12:22:35,507 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 150 transitions. Word has length 19 [2023-12-02 12:22:35,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:22:35,508 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 150 transitions. [2023-12-02 12:22:35,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 12:22:35,508 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 150 transitions. [2023-12-02 12:22:35,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 12:22:35,509 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:22:35,509 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:22:35,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 12:22:35,510 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-12-02 12:22:35,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:22:35,511 INFO L85 PathProgramCache]: Analyzing trace with hash -2072795496, now seen corresponding path program 1 times [2023-12-02 12:22:35,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:22:35,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280843334] [2023-12-02 12:22:35,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:35,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:22:35,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:35,881 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 12:22:35,882 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:22:35,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280843334] [2023-12-02 12:22:35,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280843334] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:22:35,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:22:35,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-12-02 12:22:35,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334183425] [2023-12-02 12:22:35,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:22:35,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 12:22:35,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:22:35,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 12:22:35,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-12-02 12:22:35,885 INFO L87 Difference]: Start difference. First operand 123 states and 150 transitions. Second operand has 11 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 12:22:36,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:22:36,540 INFO L93 Difference]: Finished difference Result 153 states and 190 transitions. [2023-12-02 12:22:36,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 12:22:36,542 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 19 [2023-12-02 12:22:36,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:22:36,544 INFO L225 Difference]: With dead ends: 153 [2023-12-02 12:22:36,544 INFO L226 Difference]: Without dead ends: 153 [2023-12-02 12:22:36,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-12-02 12:22:36,545 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 45 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 12:22:36,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 360 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 12:22:36,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-12-02 12:22:36,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 136. [2023-12-02 12:22:36,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 71 states have (on average 1.8732394366197183) internal successors, (133), 109 states have internal predecessors, (133), 17 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (24), 21 states have call predecessors, (24), 17 states have call successors, (24) [2023-12-02 12:22:36,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 174 transitions. [2023-12-02 12:22:36,558 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 174 transitions. Word has length 19 [2023-12-02 12:22:36,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:22:36,559 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 174 transitions. [2023-12-02 12:22:36,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 12:22:36,559 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 174 transitions. [2023-12-02 12:22:36,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-02 12:22:36,560 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:22:36,560 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:22:36,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 12:22:36,561 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting create_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-12-02 12:22:36,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:22:36,561 INFO L85 PathProgramCache]: Analyzing trace with hash 947437139, now seen corresponding path program 1 times [2023-12-02 12:22:36,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:22:36,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495854029] [2023-12-02 12:22:36,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:36,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:22:36,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:36,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:22:36,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:22:36,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495854029] [2023-12-02 12:22:36,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495854029] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:22:36,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029365391] [2023-12-02 12:22:36,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:36,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:22:36,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:22:36,734 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:22:36,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 12:22:36,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:36,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 12:22:36,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:22:36,882 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 6 treesize of output 5 [2023-12-02 12:22:36,918 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2023-12-02 12:22:36,951 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-12-02 12:22:36,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-12-02 12:22:36,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-02 12:22:36,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:22:37,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029365391] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:22:37,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [306969196] [2023-12-02 12:22:37,026 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-12-02 12:22:37,026 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:22:37,030 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:22:37,034 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:22:37,034 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:22:37,163 INFO L197 IcfgInterpreter]: Interpreting procedure create_internal with input of size 53 for LOIs [2023-12-02 12:22:37,586 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 95 for LOIs [2023-12-02 12:22:37,682 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 19 for LOIs [2023-12-02 12:22:37,708 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:22:41,164 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1696#(and (= create_internal_~sll~0.offset 0) (<= 1 |#StackHeapBarrier|) (= create_internal_~now~0.offset 0) (not (= (select |#valid| create_internal_~now~0.base) 1)) (or (and (exists ((|v_#memory_$Pointer$.offset_105| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_105| |create_internal_#t~ret7.base| (store (select |v_#memory_$Pointer$.offset_105| |create_internal_#t~ret7.base|) 0 0)))) (<= (+ create_internal_~sll~0.base 1) |#StackHeapBarrier|) (exists ((|v_#length_100| (Array Int Int))) (= |#length| (store |v_#length_100| |create_internal_#t~ret7.base| 8))) (exists ((|v_#memory_$Pointer$.base_105| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_105| |create_internal_#t~ret7.base| (store (select |v_#memory_$Pointer$.base_105| |create_internal_#t~ret7.base|) 0 0)) |#memory_$Pointer$.base|)) (exists ((|v_#valid_123| (Array Int Int))) (and (= 0 (select |v_#valid_123| |create_internal_#t~ret7.base|)) (= (store |v_#valid_123| |create_internal_#t~ret7.base| 1) |#valid|))) (exists ((|v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_3| (Array Int Int))) (= (select |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_3| 0) 0)) (exists ((|v_#valid_121| (Array Int Int)) (|v_#length_99| (Array Int Int)) (|v_#memory_$Pointer$.base_101| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_101| (Array Int (Array Int Int))) (|v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_1| Int)) (and (= |old(#valid)| (store |v_#valid_121| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_1| 1)) (= |old(#length)| (store |v_#length_99| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_1| 24)) (= |old(#memory_$Pointer$.offset)| (store |v_#memory_$Pointer$.offset_101| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_1| (store (store (store (select |v_#memory_$Pointer$.offset_101| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_1|) 0 0) 8 0) 16 0))) (= (store |v_#memory_$Pointer$.base_101| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_1| (store (store (store (select |v_#memory_$Pointer$.base_101| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_1|) 0 0) 8 0) 16 0)) |old(#memory_$Pointer$.base)|) (<= (+ |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_1| 1) |#StackHeapBarrier|) (= (select |v_#valid_121| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_1|) 0) (not (= |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_1| 0)))) (not (= |create_internal_#t~ret7.base| 0)) (exists ((|v_#valid_122| (Array Int Int))) (= (select |v_#valid_122| create_internal_~sll~0.base) 0)) (not (= create_internal_~sll~0.base 0)) (= create_internal_~now~0.base create_internal_~sll~0.base) (<= (+ |create_internal_#t~ret7.base| 1) |#StackHeapBarrier|) (exists ((|v_create_internal_#t~nondet6_6| Int)) (and (<= 0 (+ |v_create_internal_#t~nondet6_6| 2147483648)) (<= |v_create_internal_#t~nondet6_6| 2147483647) (not (= |v_create_internal_#t~nondet6_6| 0))))) (and (<= (+ create_internal_~sll~0.base 1) |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.base_104| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_104| |create_internal_#t~ret7.base| (store (select |v_#memory_$Pointer$.base_104| |create_internal_#t~ret7.base|) 0 0)) |#memory_$Pointer$.base|)) (exists ((|v_#length_102| (Array Int Int))) (= (store |v_#length_102| |create_internal_#t~ret7.base| 8) |#length|)) (exists ((|v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_3| (Array Int Int))) (= (select |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_3| 0) 0)) (exists ((|v_#valid_121| (Array Int Int)) (|v_#length_99| (Array Int Int)) (|v_#memory_$Pointer$.base_101| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_101| (Array Int (Array Int Int))) (|v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_1| Int)) (and (= |old(#valid)| (store |v_#valid_121| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_1| 1)) (= |old(#length)| (store |v_#length_99| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_1| 24)) (= |old(#memory_$Pointer$.offset)| (store |v_#memory_$Pointer$.offset_101| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_1| (store (store (store (select |v_#memory_$Pointer$.offset_101| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_1|) 0 0) 8 0) 16 0))) (= (store |v_#memory_$Pointer$.base_101| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_1| (store (store (store (select |v_#memory_$Pointer$.base_101| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_1|) 0 0) 8 0) 16 0)) |old(#memory_$Pointer$.base)|) (<= (+ |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_1| 1) |#StackHeapBarrier|) (= (select |v_#valid_121| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_1|) 0) (not (= |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_1| 0)))) (not (= |create_internal_#t~ret7.base| 0)) (exists ((|v_#valid_122| (Array Int Int))) (= (select |v_#valid_122| create_internal_~sll~0.base) 0)) (not (= create_internal_~sll~0.base 0)) (= create_internal_~now~0.base create_internal_~sll~0.base) (<= (+ |create_internal_#t~ret7.base| 1) |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.offset_106| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_106| |create_internal_#t~ret7.base| (store (select |v_#memory_$Pointer$.offset_106| |create_internal_#t~ret7.base|) 0 0)))) (exists ((|v_#valid_124| (Array Int Int))) (and (= (select |v_#valid_124| |create_internal_#t~ret7.base|) 0) (= (store |v_#valid_124| |create_internal_#t~ret7.base| 1) |#valid|))) (exists ((|v_create_internal_#t~nondet6_6| Int)) (and (<= 0 (+ |v_create_internal_#t~nondet6_6| 2147483648)) (<= |v_create_internal_#t~nondet6_6| 2147483647) (not (= |v_create_internal_#t~nondet6_6| 0)))))) (= |create_internal_#t~ret7.offset| 0))' at error location [2023-12-02 12:22:41,164 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:22:41,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:22:41,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2023-12-02 12:22:41,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236231514] [2023-12-02 12:22:41,165 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:22:41,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 12:22:41,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:22:41,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 12:22:41,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=619, Unknown=3, NotChecked=50, Total=756 [2023-12-02 12:22:41,167 INFO L87 Difference]: Start difference. First operand 136 states and 174 transitions. Second operand has 10 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 12:22:41,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:22:41,667 INFO L93 Difference]: Finished difference Result 149 states and 190 transitions. [2023-12-02 12:22:41,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 12:22:41,668 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 21 [2023-12-02 12:22:41,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:22:41,669 INFO L225 Difference]: With dead ends: 149 [2023-12-02 12:22:41,670 INFO L226 Difference]: Without dead ends: 149 [2023-12-02 12:22:41,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=108, Invalid=823, Unknown=3, NotChecked=58, Total=992 [2023-12-02 12:22:41,671 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 49 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:22:41,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 349 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 438 Invalid, 0 Unknown, 143 Unchecked, 0.3s Time] [2023-12-02 12:22:41,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-12-02 12:22:41,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 137. [2023-12-02 12:22:41,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 72 states have (on average 1.8611111111111112) internal successors, (134), 109 states have internal predecessors, (134), 18 states have call successors, (18), 5 states have call predecessors, (18), 6 states have return successors, (25), 22 states have call predecessors, (25), 18 states have call successors, (25) [2023-12-02 12:22:41,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 177 transitions. [2023-12-02 12:22:41,682 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 177 transitions. Word has length 21 [2023-12-02 12:22:41,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:22:41,682 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 177 transitions. [2023-12-02 12:22:41,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 12:22:41,683 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 177 transitions. [2023-12-02 12:22:41,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-02 12:22:41,684 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:22:41,684 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:22:41,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 12:22:41,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-12-02 12:22:41,894 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting create_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-12-02 12:22:41,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:22:41,895 INFO L85 PathProgramCache]: Analyzing trace with hash 947437140, now seen corresponding path program 1 times [2023-12-02 12:22:41,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:22:41,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781326737] [2023-12-02 12:22:41,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:41,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:22:41,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:42,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:22:42,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:22:42,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781326737] [2023-12-02 12:22:42,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781326737] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:22:42,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909621628] [2023-12-02 12:22:42,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:42,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:22:42,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:22:42,157 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:22:42,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 12:22:42,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:42,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-02 12:22:42,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:22:42,264 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 6 treesize of output 5 [2023-12-02 12:22:42,270 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 12:22:42,382 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2023-12-02 12:22:42,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:22:42,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:22:42,408 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 12:22:42,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 12:22:42,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-02 12:22:42,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:22:42,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909621628] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:22:42,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1497450125] [2023-12-02 12:22:42,528 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-12-02 12:22:42,529 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:22:42,529 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:22:42,529 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:22:42,529 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:22:42,596 INFO L197 IcfgInterpreter]: Interpreting procedure create_internal with input of size 55 for LOIs [2023-12-02 12:22:42,879 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 95 for LOIs [2023-12-02 12:22:42,948 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 19 for LOIs [2023-12-02 12:22:42,968 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:22:46,612 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2091#(and (= create_internal_~sll~0.offset 0) (<= 1 |#StackHeapBarrier|) (or (and (<= (+ create_internal_~sll~0.base 1) |#StackHeapBarrier|) (exists ((|v_#valid_135| (Array Int Int))) (and (= (select |v_#valid_135| |create_internal_#t~ret7.base|) 0) (= (store |v_#valid_135| |create_internal_#t~ret7.base| 1) |#valid|))) (exists ((|v_#valid_137| (Array Int Int))) (= (select |v_#valid_137| create_internal_~sll~0.base) 0)) (exists ((|v_#memory_$Pointer$.offset_118| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_118| |create_internal_#t~ret7.base| (store (select |v_#memory_$Pointer$.offset_118| |create_internal_#t~ret7.base|) 0 0)))) (not (= |create_internal_#t~ret7.base| 0)) (exists ((|v_create_internal_#t~nondet6_7| Int)) (and (not (= |v_create_internal_#t~nondet6_7| 0)) (<= 0 (+ |v_create_internal_#t~nondet6_7| 2147483648)) (<= |v_create_internal_#t~nondet6_7| 2147483647))) (exists ((|v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_7| (Array Int Int))) (= (select |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_7| 0) 0)) (not (= create_internal_~sll~0.base 0)) (= create_internal_~now~0.base create_internal_~sll~0.base) (exists ((|v_#memory_$Pointer$.offset_115| (Array Int (Array Int Int))) (|v_#valid_134| (Array Int Int)) (|v_#length_113| (Array Int Int)) (|v_#memory_$Pointer$.base_115| (Array Int (Array Int Int))) (|v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_2| Int)) (and (= |old(#memory_$Pointer$.offset)| (store |v_#memory_$Pointer$.offset_115| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_2| (store (store (store (select |v_#memory_$Pointer$.offset_115| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_2|) 0 0) 8 0) 16 0))) (not (= |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_2| 0)) (= (select |v_#valid_134| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_2|) 0) (= |old(#valid)| (store |v_#valid_134| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_2| 1)) (= |old(#length)| (store |v_#length_113| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_2| 24)) (= |old(#memory_$Pointer$.base)| (store |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_2| (store (store (store (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_2|) 0 0) 8 0) 16 0))) (<= (+ |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_2| 1) |#StackHeapBarrier|))) (exists ((|v_#length_116| (Array Int Int))) (= (store |v_#length_116| |create_internal_#t~ret7.base| 8) |#length|)) (<= (+ |create_internal_#t~ret7.base| 1) |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.base_120| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_120| |create_internal_#t~ret7.base| (store (select |v_#memory_$Pointer$.base_120| |create_internal_#t~ret7.base|) 0 0)) |#memory_$Pointer$.base|))) (and (exists ((|v_#memory_$Pointer$.offset_119| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_119| |create_internal_#t~ret7.base| (store (select |v_#memory_$Pointer$.offset_119| |create_internal_#t~ret7.base|) 0 0)))) (<= (+ create_internal_~sll~0.base 1) |#StackHeapBarrier|) (exists ((|v_#length_114| (Array Int Int))) (= |#length| (store |v_#length_114| |create_internal_#t~ret7.base| 8))) (exists ((|v_#valid_136| (Array Int Int))) (= (select |v_#valid_136| create_internal_~sll~0.base) 0)) (exists ((|v_#valid_135| (Array Int Int))) (and (= (select |v_#valid_135| |create_internal_#t~ret7.base|) 0) (= (store |v_#valid_135| |create_internal_#t~ret7.base| 1) |#valid|))) (not (= |create_internal_#t~ret7.base| 0)) (exists ((|v_create_internal_#t~nondet6_7| Int)) (and (not (= |v_create_internal_#t~nondet6_7| 0)) (<= 0 (+ |v_create_internal_#t~nondet6_7| 2147483648)) (<= |v_create_internal_#t~nondet6_7| 2147483647))) (exists ((|v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_7| (Array Int Int))) (= (select |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_7| 0) 0)) (not (= create_internal_~sll~0.base 0)) (= create_internal_~now~0.base create_internal_~sll~0.base) (exists ((|v_#memory_$Pointer$.offset_115| (Array Int (Array Int Int))) (|v_#valid_134| (Array Int Int)) (|v_#length_113| (Array Int Int)) (|v_#memory_$Pointer$.base_115| (Array Int (Array Int Int))) (|v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_2| Int)) (and (= |old(#memory_$Pointer$.offset)| (store |v_#memory_$Pointer$.offset_115| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_2| (store (store (store (select |v_#memory_$Pointer$.offset_115| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_2|) 0 0) 8 0) 16 0))) (not (= |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_2| 0)) (= (select |v_#valid_134| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_2|) 0) (= |old(#valid)| (store |v_#valid_134| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_2| 1)) (= |old(#length)| (store |v_#length_113| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_2| 24)) (= |old(#memory_$Pointer$.base)| (store |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_2| (store (store (store (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_2|) 0 0) 8 0) 16 0))) (<= (+ |v_ULTIMATE.start_create_~now~1#1.base_BEFORE_CALL_2| 1) |#StackHeapBarrier|))) (<= (+ |create_internal_#t~ret7.base| 1) |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.base_119| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_119| |create_internal_#t~ret7.base| (store (select |v_#memory_$Pointer$.base_119| |create_internal_#t~ret7.base|) 0 0)) |#memory_$Pointer$.base|)))) (= create_internal_~now~0.offset 0) (<= (select |#length| create_internal_~now~0.base) 7) (= |create_internal_#t~ret7.offset| 0))' at error location [2023-12-02 12:22:46,613 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:22:46,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:22:46,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-12-02 12:22:46,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693833650] [2023-12-02 12:22:46,613 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:22:46,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 12:22:46,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:22:46,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 12:22:46,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1011, Unknown=4, NotChecked=64, Total=1190 [2023-12-02 12:22:46,615 INFO L87 Difference]: Start difference. First operand 137 states and 177 transitions. Second operand has 16 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 12:22:47,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:22:47,279 INFO L93 Difference]: Finished difference Result 149 states and 190 transitions. [2023-12-02 12:22:47,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 12:22:47,280 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 21 [2023-12-02 12:22:47,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:22:47,281 INFO L225 Difference]: With dead ends: 149 [2023-12-02 12:22:47,281 INFO L226 Difference]: Without dead ends: 149 [2023-12-02 12:22:47,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=152, Invalid=1330, Unknown=4, NotChecked=74, Total=1560 [2023-12-02 12:22:47,283 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 71 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:22:47,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 469 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 869 Invalid, 0 Unknown, 143 Unchecked, 0.4s Time] [2023-12-02 12:22:47,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-12-02 12:22:47,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 138. [2023-12-02 12:22:47,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 73 states have (on average 1.8356164383561644) internal successors, (134), 110 states have internal predecessors, (134), 18 states have call successors, (18), 5 states have call predecessors, (18), 6 states have return successors, (25), 22 states have call predecessors, (25), 18 states have call successors, (25) [2023-12-02 12:22:47,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 177 transitions. [2023-12-02 12:22:47,292 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 177 transitions. Word has length 21 [2023-12-02 12:22:47,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:22:47,293 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 177 transitions. [2023-12-02 12:22:47,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 12:22:47,293 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 177 transitions. [2023-12-02 12:22:47,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 12:22:47,294 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:22:47,294 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:22:47,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 12:22:47,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:22:47,495 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-12-02 12:22:47,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:22:47,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1631406481, now seen corresponding path program 1 times [2023-12-02 12:22:47,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:22:47,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948672317] [2023-12-02 12:22:47,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:47,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:22:47,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:47,953 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:22:47,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:22:47,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948672317] [2023-12-02 12:22:47,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948672317] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:22:47,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902602158] [2023-12-02 12:22:47,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:47,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:22:47,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:22:47,954 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:22:47,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 12:22:48,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:48,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 12:22:48,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:22:48,061 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 6 treesize of output 5 [2023-12-02 12:22:48,079 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2023-12-02 12:22:48,105 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base 1))) is different from true [2023-12-02 12:22:48,290 INFO L349 Elim1Store]: treesize reduction 104, result has 34.2 percent of original size [2023-12-02 12:22:48,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 40 treesize of output 104 [2023-12-02 12:22:48,796 INFO L349 Elim1Store]: treesize reduction 15, result has 21.1 percent of original size [2023-12-02 12:22:48,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 16 [2023-12-02 12:22:48,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2023-12-02 12:22:48,825 INFO L349 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-12-02 12:22:48,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 14 [2023-12-02 12:22:48,858 INFO L349 Elim1Store]: treesize reduction 43, result has 28.3 percent of original size [2023-12-02 12:22:48,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 34 treesize of output 33 [2023-12-02 12:22:48,902 INFO L349 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-12-02 12:22:48,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 14 [2023-12-02 12:22:48,934 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2023-12-02 12:22:48,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:22:49,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902602158] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:22:49,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1632040847] [2023-12-02 12:22:49,021 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 12:22:49,021 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:22:49,022 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:22:49,022 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:22:49,022 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:22:49,760 INFO L197 IcfgInterpreter]: Interpreting procedure create_internal with input of size 57 for LOIs [2023-12-02 12:22:50,856 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 56 for LOIs [2023-12-02 12:22:50,875 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 19 for LOIs [2023-12-02 12:22:50,888 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:22:57,672 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2507#(and (not (= (select |#valid| |ULTIMATE.start_create_~now~1#1.base|) 1)) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_create_#t~ret10#1.offset| 0) (or (and (<= (+ |ULTIMATE.start_create_~sll~1#1.base| 1) |#StackHeapBarrier|) (not (= |ULTIMATE.start_create_~sll~1#1.base| 0)) (exists ((|v_#valid_160| (Array Int Int))) (= (select |v_#valid_160| |ULTIMATE.start_create_~sll~1#1.base|) 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (exists ((v_create_internal_~now~0.offset_20 Int) (|v_#memory_$Pointer$.base_140| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_140| (Array Int (Array Int Int))) (v_create_internal_~now~0.base_22 Int) (|v_#valid_161| (Array Int Int)) (|v_#length_131| (Array Int Int))) (and (= (store |v_#valid_161| (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_22) v_create_internal_~now~0.offset_20) 1) |#valid|) (<= (+ v_create_internal_~now~0.offset_20 8) (select |#length| v_create_internal_~now~0.base_22)) (= |#length| (store |v_#length_131| (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_22) v_create_internal_~now~0.offset_20) 8)) (= |#memory_$Pointer$.base| (store (store |v_#memory_$Pointer$.base_140| (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_22) v_create_internal_~now~0.offset_20) (store (select |v_#memory_$Pointer$.base_140| (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_22) v_create_internal_~now~0.offset_20)) 0 0)) v_create_internal_~now~0.base_22 (store (select (store |v_#memory_$Pointer$.base_140| (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_22) v_create_internal_~now~0.offset_20) (store (select |v_#memory_$Pointer$.base_140| (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_22) v_create_internal_~now~0.offset_20)) 0 0)) v_create_internal_~now~0.base_22) v_create_internal_~now~0.offset_20 (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_22) v_create_internal_~now~0.offset_20)))) (<= 0 v_create_internal_~now~0.offset_20) (= (select |#valid| v_create_internal_~now~0.base_22) 1) (= (select |v_#valid_161| (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_22) v_create_internal_~now~0.offset_20)) 0) (= |#memory_$Pointer$.offset| (store (store |v_#memory_$Pointer$.offset_140| (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_22) v_create_internal_~now~0.offset_20) (store (select |v_#memory_$Pointer$.offset_140| (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_22) v_create_internal_~now~0.offset_20)) 0 0)) v_create_internal_~now~0.base_22 (store (select (store |v_#memory_$Pointer$.offset_140| (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_22) v_create_internal_~now~0.offset_20) (store (select |v_#memory_$Pointer$.offset_140| (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_22) v_create_internal_~now~0.offset_20)) 0 0)) v_create_internal_~now~0.base_22) v_create_internal_~now~0.offset_20 0))) (<= (+ (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_22) v_create_internal_~now~0.offset_20) 1) |#StackHeapBarrier|) (not (= (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_22) v_create_internal_~now~0.offset_20) 0)))) (= |ULTIMATE.start_create_~now~1#1.base| |ULTIMATE.start_create_~sll~1#1.base|)) (and (<= (+ |ULTIMATE.start_create_~sll~1#1.base| 1) |#StackHeapBarrier|) (not (= |ULTIMATE.start_create_~sll~1#1.base| 0)) (not (= |ULTIMATE.start_create_#t~ret10#1.base| 0)) (exists ((|v_#memory_$Pointer$.offset_140| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_140| |ULTIMATE.start_create_#t~ret10#1.base| (store (select |v_#memory_$Pointer$.offset_140| |ULTIMATE.start_create_#t~ret10#1.base|) 0 0)))) (exists ((|v_#valid_160| (Array Int Int))) (= (select |v_#valid_160| |ULTIMATE.start_create_~sll~1#1.base|) 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (exists ((|v_#valid_161| (Array Int Int))) (and (= (store |v_#valid_161| |ULTIMATE.start_create_#t~ret10#1.base| 1) |#valid|) (= (select |v_#valid_161| |ULTIMATE.start_create_#t~ret10#1.base|) 0))) (exists ((|v_#length_131| (Array Int Int))) (= (store |v_#length_131| |ULTIMATE.start_create_#t~ret10#1.base| 8) |#length|)) (<= (+ |ULTIMATE.start_create_#t~ret10#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.base_140| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_140| |ULTIMATE.start_create_#t~ret10#1.base| (store (select |v_#memory_$Pointer$.base_140| |ULTIMATE.start_create_#t~ret10#1.base|) 0 0)) |#memory_$Pointer$.base|)) (= |ULTIMATE.start_create_~now~1#1.base| |ULTIMATE.start_create_~sll~1#1.base|))) (= |ULTIMATE.start_create_~now~1#1.offset| 0) (= |ULTIMATE.start_create_~sll~1#1.offset| 0))' at error location [2023-12-02 12:22:57,672 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:22:57,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:22:57,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 16 [2023-12-02 12:22:57,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177062803] [2023-12-02 12:22:57,673 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:22:57,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 12:22:57,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:22:57,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 12:22:57,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1181, Unknown=3, NotChecked=142, Total=1482 [2023-12-02 12:22:57,675 INFO L87 Difference]: Start difference. First operand 138 states and 177 transitions. Second operand has 17 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 5 states have call successors, (5), 2 states have call predecessors, (5), 7 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2023-12-02 12:22:58,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:22:58,993 INFO L93 Difference]: Finished difference Result 170 states and 218 transitions. [2023-12-02 12:22:58,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 12:22:58,994 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 5 states have call successors, (5), 2 states have call predecessors, (5), 7 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 27 [2023-12-02 12:22:58,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:22:58,996 INFO L225 Difference]: With dead ends: 170 [2023-12-02 12:22:58,997 INFO L226 Difference]: Without dead ends: 170 [2023-12-02 12:22:58,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=236, Invalid=1749, Unknown=3, NotChecked=174, Total=2162 [2023-12-02 12:22:58,998 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 108 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 69 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 1259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 346 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 12:22:58,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 449 Invalid, 1259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 842 Invalid, 2 Unknown, 346 Unchecked, 0.8s Time] [2023-12-02 12:22:58,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-12-02 12:22:59,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 143. [2023-12-02 12:22:59,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 77 states have (on average 1.8181818181818181) internal successors, (140), 114 states have internal predecessors, (140), 18 states have call successors, (18), 5 states have call predecessors, (18), 7 states have return successors, (32), 23 states have call predecessors, (32), 18 states have call successors, (32) [2023-12-02 12:22:59,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 190 transitions. [2023-12-02 12:22:59,010 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 190 transitions. Word has length 27 [2023-12-02 12:22:59,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:22:59,010 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 190 transitions. [2023-12-02 12:22:59,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 5 states have call successors, (5), 2 states have call predecessors, (5), 7 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2023-12-02 12:22:59,011 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 190 transitions. [2023-12-02 12:22:59,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 12:22:59,012 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:22:59,012 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:22:59,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-02 12:22:59,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-12-02 12:22:59,217 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-12-02 12:22:59,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:22:59,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1631406480, now seen corresponding path program 1 times [2023-12-02 12:22:59,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:22:59,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140120013] [2023-12-02 12:22:59,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:59,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:22:59,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:59,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 12:22:59,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:22:59,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140120013] [2023-12-02 12:22:59,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140120013] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:22:59,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724608327] [2023-12-02 12:22:59,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:59,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:22:59,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:22:59,730 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:22:59,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 12:22:59,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:59,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 53 conjunts are in the unsatisfiable core [2023-12-02 12:22:59,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:22:59,845 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 12:22:59,849 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 6 treesize of output 5 [2023-12-02 12:23:00,032 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2023-12-02 12:23:00,064 WARN L876 $PredicateComparison]: unable to prove that (exists ((create_internal_~now~0.base Int) (alloc_and_zero_internal_~pi~1.base Int)) (and (= (store (store |c_old(#length)| create_internal_~now~0.base (select |c_#length| create_internal_~now~0.base)) alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (select |c_old(#valid)| create_internal_~now~0.base) 0) (= (select (store |c_old(#valid)| create_internal_~now~0.base 1) alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2023-12-02 12:23:00,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:23:00,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:23:00,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:23:00,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2023-12-02 12:23:00,129 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-12-02 12:23:00,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-12-02 12:23:00,132 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2023-12-02 12:23:00,132 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:23:00,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724608327] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:23:00,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1392155062] [2023-12-02 12:23:00,371 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 12:23:00,371 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:23:00,372 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:23:00,372 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:23:00,372 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:23:01,063 INFO L197 IcfgInterpreter]: Interpreting procedure create_internal with input of size 55 for LOIs [2023-12-02 12:23:01,812 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 56 for LOIs [2023-12-02 12:23:01,834 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 19 for LOIs [2023-12-02 12:23:01,849 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:23:08,523 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2964#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_create_#t~ret10#1.offset| 0) (<= (select |#length| |ULTIMATE.start_create_~now~1#1.base|) 15) (or (and (<= (+ |ULTIMATE.start_create_~sll~1#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.base_172| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_172| |ULTIMATE.start_create_#t~ret10#1.base| (store (select |v_#memory_$Pointer$.base_172| |ULTIMATE.start_create_#t~ret10#1.base|) 0 0)) |#memory_$Pointer$.base|)) (not (= |ULTIMATE.start_create_~sll~1#1.base| 0)) (exists ((|v_#memory_$Pointer$.offset_172| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_172| |ULTIMATE.start_create_#t~ret10#1.base| (store (select |v_#memory_$Pointer$.offset_172| |ULTIMATE.start_create_#t~ret10#1.base|) 0 0)))) (exists ((|v_#length_159| (Array Int Int))) (= (store |v_#length_159| |ULTIMATE.start_create_#t~ret10#1.base| 8) |#length|)) (not (= |ULTIMATE.start_create_#t~ret10#1.base| 0)) (exists ((|v_#valid_188| (Array Int Int))) (and (= (store |v_#valid_188| |ULTIMATE.start_create_#t~ret10#1.base| 1) |#valid|) (= (select |v_#valid_188| |ULTIMATE.start_create_#t~ret10#1.base|) 0))) (exists ((|v_#valid_187| (Array Int Int))) (= (select |v_#valid_187| |ULTIMATE.start_create_~sll~1#1.base|) 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= (+ |ULTIMATE.start_create_#t~ret10#1.base| 1) |#StackHeapBarrier|) (= |ULTIMATE.start_create_~now~1#1.base| |ULTIMATE.start_create_~sll~1#1.base|)) (and (<= (+ |ULTIMATE.start_create_~sll~1#1.base| 1) |#StackHeapBarrier|) (exists ((v_create_internal_~now~0.offset_32 Int) (|v_#memory_$Pointer$.base_172| (Array Int (Array Int Int))) (|v_#valid_188| (Array Int Int)) (|v_#memory_$Pointer$.offset_172| (Array Int (Array Int Int))) (|v_#length_159| (Array Int Int)) (v_create_internal_~now~0.base_34 Int)) (and (= (select |#valid| v_create_internal_~now~0.base_34) 1) (= (store |v_#valid_188| (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_34) v_create_internal_~now~0.offset_32) 1) |#valid|) (not (= (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_34) v_create_internal_~now~0.offset_32) 0)) (= (store |v_#length_159| (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_34) v_create_internal_~now~0.offset_32) 8) |#length|) (<= (+ v_create_internal_~now~0.offset_32 8) (select |#length| v_create_internal_~now~0.base_34)) (= (store (store |v_#memory_$Pointer$.base_172| (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_34) v_create_internal_~now~0.offset_32) (store (select |v_#memory_$Pointer$.base_172| (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_34) v_create_internal_~now~0.offset_32)) 0 0)) v_create_internal_~now~0.base_34 (store (select (store |v_#memory_$Pointer$.base_172| (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_34) v_create_internal_~now~0.offset_32) (store (select |v_#memory_$Pointer$.base_172| (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_34) v_create_internal_~now~0.offset_32)) 0 0)) v_create_internal_~now~0.base_34) v_create_internal_~now~0.offset_32 (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_34) v_create_internal_~now~0.offset_32))) |#memory_$Pointer$.base|) (<= 0 v_create_internal_~now~0.offset_32) (= (select |v_#valid_188| (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_34) v_create_internal_~now~0.offset_32)) 0) (<= (+ (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_34) v_create_internal_~now~0.offset_32) 1) |#StackHeapBarrier|) (= |#memory_$Pointer$.offset| (store (store |v_#memory_$Pointer$.offset_172| (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_34) v_create_internal_~now~0.offset_32) (store (select |v_#memory_$Pointer$.offset_172| (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_34) v_create_internal_~now~0.offset_32)) 0 0)) v_create_internal_~now~0.base_34 (store (select (store |v_#memory_$Pointer$.offset_172| (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_34) v_create_internal_~now~0.offset_32) (store (select |v_#memory_$Pointer$.offset_172| (select (select |#memory_$Pointer$.base| v_create_internal_~now~0.base_34) v_create_internal_~now~0.offset_32)) 0 0)) v_create_internal_~now~0.base_34) v_create_internal_~now~0.offset_32 0))))) (not (= |ULTIMATE.start_create_~sll~1#1.base| 0)) (exists ((|v_#valid_187| (Array Int Int))) (= (select |v_#valid_187| |ULTIMATE.start_create_~sll~1#1.base|) 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (= |ULTIMATE.start_create_~now~1#1.base| |ULTIMATE.start_create_~sll~1#1.base|))) (= |ULTIMATE.start_create_~now~1#1.offset| 0) (= |ULTIMATE.start_create_~sll~1#1.offset| 0))' at error location [2023-12-02 12:23:08,523 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:23:08,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:23:08,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2023-12-02 12:23:08,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764052269] [2023-12-02 12:23:08,523 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:23:08,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 12:23:08,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:23:08,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 12:23:08,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1461, Unknown=3, NotChecked=158, Total=1806 [2023-12-02 12:23:08,526 INFO L87 Difference]: Start difference. First operand 143 states and 190 transitions. Second operand has 20 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 16 states have internal predecessors, (35), 5 states have call successors, (5), 2 states have call predecessors, (5), 7 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2023-12-02 12:23:09,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:23:09,417 INFO L93 Difference]: Finished difference Result 182 states and 242 transitions. [2023-12-02 12:23:09,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 12:23:09,418 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 16 states have internal predecessors, (35), 5 states have call successors, (5), 2 states have call predecessors, (5), 7 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 27 [2023-12-02 12:23:09,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:23:09,420 INFO L225 Difference]: With dead ends: 182 [2023-12-02 12:23:09,420 INFO L226 Difference]: Without dead ends: 182 [2023-12-02 12:23:09,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=225, Invalid=1760, Unknown=3, NotChecked=174, Total=2162 [2023-12-02 12:23:09,421 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 92 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 1232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 382 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 12:23:09,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 276 Invalid, 1232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 799 Invalid, 0 Unknown, 382 Unchecked, 0.6s Time] [2023-12-02 12:23:09,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-12-02 12:23:09,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 140. [2023-12-02 12:23:09,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 75 states have (on average 1.8266666666666667) internal successors, (137), 112 states have internal predecessors, (137), 18 states have call successors, (18), 5 states have call predecessors, (18), 6 states have return successors, (25), 22 states have call predecessors, (25), 18 states have call successors, (25) [2023-12-02 12:23:09,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 180 transitions. [2023-12-02 12:23:09,428 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 180 transitions. Word has length 27 [2023-12-02 12:23:09,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:23:09,429 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 180 transitions. [2023-12-02 12:23:09,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 16 states have internal predecessors, (35), 5 states have call successors, (5), 2 states have call predecessors, (5), 7 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2023-12-02 12:23:09,429 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 180 transitions. [2023-12-02 12:23:09,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 12:23:09,430 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:23:09,430 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:23:09,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 12:23:09,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 12:23:09,631 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting create_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-12-02 12:23:09,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:23:09,631 INFO L85 PathProgramCache]: Analyzing trace with hash -79480789, now seen corresponding path program 1 times [2023-12-02 12:23:09,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:23:09,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308372055] [2023-12-02 12:23:09,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:23:09,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:23:09,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:23:09,879 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 12:23:09,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:23:09,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308372055] [2023-12-02 12:23:09,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308372055] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:23:09,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82352206] [2023-12-02 12:23:09,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:23:09,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:23:09,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:23:09,882 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:23:09,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 12:23:09,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:23:09,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 12:23:09,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:23:09,998 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 6 treesize of output 5 [2023-12-02 12:23:10,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 12:23:10,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-12-02 12:23:10,022 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2023-12-02 12:23:10,038 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-12-02 12:23:10,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-12-02 12:23:10,040 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-12-02 12:23:10,040 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:23:10,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82352206] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:23:10,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [55194451] [2023-12-02 12:23:10,074 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 12:23:10,074 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:23:10,074 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:23:10,074 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:23:10,074 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:23:10,121 INFO L197 IcfgInterpreter]: Interpreting procedure create_internal with input of size 55 for LOIs [2023-12-02 12:23:10,835 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 56 for LOIs [2023-12-02 12:23:10,859 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 19 for LOIs [2023-12-02 12:23:10,876 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:23:13,592 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3418#(and (= create_internal_~sll~0.offset 0) (exists ((|v_#valid_204| (Array Int Int))) (and (= (select |v_#valid_204| |create_internal_#t~ret7.base|) 0) (= (store |v_#valid_204| |create_internal_#t~ret7.base| 1) |#valid|))) (<= 1 |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.base_197| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_197| |create_internal_#t~ret7.base| (store (select |v_#memory_$Pointer$.base_197| |create_internal_#t~ret7.base|) 0 0)) |#memory_$Pointer$.base|)) (not (= (select |#valid| create_internal_~now~0.base) 1)) (not (= |create_internal_#t~ret7.base| 0)) (exists ((|v_#memory_$Pointer$.offset_196| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_196| |create_internal_#t~ret7.base| (store (select |v_#memory_$Pointer$.offset_196| |create_internal_#t~ret7.base|) 0 0)))) (= |create_internal_#t~ret7.offset| 0) (<= (+ |create_internal_#t~ret7.base| 1) |#StackHeapBarrier|) (exists ((|v_#length_171| (Array Int Int))) (= (store |v_#length_171| |create_internal_#t~ret7.base| 8) |#length|)))' at error location [2023-12-02 12:23:13,592 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:23:13,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:23:13,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2023-12-02 12:23:13,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139008989] [2023-12-02 12:23:13,593 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:23:13,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 12:23:13,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:23:13,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 12:23:13,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=773, Unknown=1, NotChecked=56, Total=930 [2023-12-02 12:23:13,594 INFO L87 Difference]: Start difference. First operand 140 states and 180 transitions. Second operand has 11 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 12:23:14,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:23:14,068 INFO L93 Difference]: Finished difference Result 152 states and 200 transitions. [2023-12-02 12:23:14,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 12:23:14,068 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 29 [2023-12-02 12:23:14,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:23:14,070 INFO L225 Difference]: With dead ends: 152 [2023-12-02 12:23:14,070 INFO L226 Difference]: Without dead ends: 152 [2023-12-02 12:23:14,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=126, Invalid=999, Unknown=1, NotChecked=64, Total=1190 [2023-12-02 12:23:14,071 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 33 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:23:14,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 465 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 612 Invalid, 0 Unknown, 141 Unchecked, 0.3s Time] [2023-12-02 12:23:14,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-12-02 12:23:14,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 139. [2023-12-02 12:23:14,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 75 states have (on average 1.8133333333333332) internal successors, (136), 111 states have internal predecessors, (136), 18 states have call successors, (18), 5 states have call predecessors, (18), 6 states have return successors, (25), 22 states have call predecessors, (25), 18 states have call successors, (25) [2023-12-02 12:23:14,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 179 transitions. [2023-12-02 12:23:14,077 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 179 transitions. Word has length 29 [2023-12-02 12:23:14,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:23:14,077 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 179 transitions. [2023-12-02 12:23:14,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 12:23:14,077 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 179 transitions. [2023-12-02 12:23:14,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 12:23:14,078 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:23:14,078 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:23:14,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 12:23:14,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:23:14,279 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting create_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-12-02 12:23:14,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:23:14,279 INFO L85 PathProgramCache]: Analyzing trace with hash -79480788, now seen corresponding path program 1 times [2023-12-02 12:23:14,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:23:14,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544089874] [2023-12-02 12:23:14,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:23:14,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:23:14,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:23:14,600 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 12:23:14,600 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:23:14,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544089874] [2023-12-02 12:23:14,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544089874] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:23:14,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283911818] [2023-12-02 12:23:14,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:23:14,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:23:14,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:23:14,602 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:23:14,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 12:23:14,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:23:14,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-02 12:23:14,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:23:14,727 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 6 treesize of output 5 [2023-12-02 12:23:14,733 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 12:23:14,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 12:23:14,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 12:23:14,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2023-12-02 12:23:14,824 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2023-12-02 12:23:14,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:23:14,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:23:14,843 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 12:23:14,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 12:23:14,846 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-12-02 12:23:14,846 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:23:14,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283911818] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:23:14,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1153985746] [2023-12-02 12:23:14,940 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 12:23:14,940 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:23:14,940 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:23:14,940 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:23:14,941 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:23:15,007 INFO L197 IcfgInterpreter]: Interpreting procedure create_internal with input of size 55 for LOIs [2023-12-02 12:23:15,763 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 58 for LOIs [2023-12-02 12:23:15,785 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 19 for LOIs [2023-12-02 12:23:15,797 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:23:18,396 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3841#(and (exists ((|v_#memory_$Pointer$.offset_215| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_215| |create_internal_#t~ret7.base| (store (select |v_#memory_$Pointer$.offset_215| |create_internal_#t~ret7.base|) 0 0)))) (= create_internal_~sll~0.offset 0) (<= 1 |#StackHeapBarrier|) (exists ((|v_#valid_217| (Array Int Int))) (and (= (store |v_#valid_217| |create_internal_#t~ret7.base| 1) |#valid|) (= (select |v_#valid_217| |create_internal_#t~ret7.base|) 0))) (exists ((|v_#memory_$Pointer$.base_216| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_216| |create_internal_#t~ret7.base| (store (select |v_#memory_$Pointer$.base_216| |create_internal_#t~ret7.base|) 0 0)) |#memory_$Pointer$.base|)) (not (= |create_internal_#t~ret7.base| 0)) (= |create_internal_#t~ret7.offset| 0) (<= (+ |create_internal_#t~ret7.base| 1) |#StackHeapBarrier|) (or (< create_internal_~now~0.offset 0) (< (select |#length| create_internal_~now~0.base) (+ create_internal_~now~0.offset 8))) (exists ((|v_#length_185| (Array Int Int))) (= (store |v_#length_185| |create_internal_#t~ret7.base| 8) |#length|)))' at error location [2023-12-02 12:23:18,396 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:23:18,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:23:18,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2023-12-02 12:23:18,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331755384] [2023-12-02 12:23:18,397 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:23:18,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 12:23:18,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:23:18,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 12:23:18,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=946, Unknown=1, NotChecked=62, Total=1122 [2023-12-02 12:23:18,398 INFO L87 Difference]: Start difference. First operand 139 states and 179 transitions. Second operand has 13 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 12:23:18,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:23:18,997 INFO L93 Difference]: Finished difference Result 150 states and 198 transitions. [2023-12-02 12:23:18,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 12:23:18,997 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 29 [2023-12-02 12:23:18,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:23:18,998 INFO L225 Difference]: With dead ends: 150 [2023-12-02 12:23:18,998 INFO L226 Difference]: Without dead ends: 150 [2023-12-02 12:23:18,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=142, Invalid=1193, Unknown=1, NotChecked=70, Total=1406 [2023-12-02 12:23:19,000 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 42 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 12:23:19,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 384 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 819 Invalid, 0 Unknown, 140 Unchecked, 0.5s Time] [2023-12-02 12:23:19,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-12-02 12:23:19,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 137. [2023-12-02 12:23:19,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 75 states have (on average 1.7866666666666666) internal successors, (134), 109 states have internal predecessors, (134), 18 states have call successors, (18), 5 states have call predecessors, (18), 6 states have return successors, (25), 22 states have call predecessors, (25), 18 states have call successors, (25) [2023-12-02 12:23:19,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 177 transitions. [2023-12-02 12:23:19,006 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 177 transitions. Word has length 29 [2023-12-02 12:23:19,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:23:19,006 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 177 transitions. [2023-12-02 12:23:19,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 12:23:19,007 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 177 transitions. [2023-12-02 12:23:19,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-02 12:23:19,007 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:23:19,008 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:23:19,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 12:23:19,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:23:19,208 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-12-02 12:23:19,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:23:19,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1913750456, now seen corresponding path program 1 times [2023-12-02 12:23:19,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:23:19,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860038420] [2023-12-02 12:23:19,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:23:19,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:23:19,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:23:19,295 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 12:23:19,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:23:19,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860038420] [2023-12-02 12:23:19,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860038420] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:23:19,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:23:19,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 12:23:19,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44529247] [2023-12-02 12:23:19,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:23:19,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 12:23:19,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:23:19,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 12:23:19,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 12:23:19,297 INFO L87 Difference]: Start difference. First operand 137 states and 177 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 12:23:19,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:23:19,463 INFO L93 Difference]: Finished difference Result 164 states and 216 transitions. [2023-12-02 12:23:19,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 12:23:19,463 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2023-12-02 12:23:19,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:23:19,465 INFO L225 Difference]: With dead ends: 164 [2023-12-02 12:23:19,465 INFO L226 Difference]: Without dead ends: 164 [2023-12-02 12:23:19,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:23:19,466 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 34 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:23:19,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 236 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:23:19,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2023-12-02 12:23:19,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 151. [2023-12-02 12:23:19,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 89 states have (on average 1.8426966292134832) internal successors, (164), 119 states have internal predecessors, (164), 20 states have call successors, (20), 5 states have call predecessors, (20), 6 states have return successors, (29), 26 states have call predecessors, (29), 20 states have call successors, (29) [2023-12-02 12:23:19,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 213 transitions. [2023-12-02 12:23:19,475 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 213 transitions. Word has length 35 [2023-12-02 12:23:19,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:23:19,475 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 213 transitions. [2023-12-02 12:23:19,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 12:23:19,476 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 213 transitions. [2023-12-02 12:23:19,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-02 12:23:19,477 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:23:19,477 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:23:19,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-02 12:23:19,478 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-12-02 12:23:19,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:23:19,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1913750455, now seen corresponding path program 1 times [2023-12-02 12:23:19,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:23:19,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678189486] [2023-12-02 12:23:19,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:23:19,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:23:19,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:23:19,680 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 12:23:19,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:23:19,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678189486] [2023-12-02 12:23:19,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678189486] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:23:19,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:23:19,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 12:23:19,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470531139] [2023-12-02 12:23:19,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:23:19,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 12:23:19,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:23:19,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 12:23:19,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 12:23:19,682 INFO L87 Difference]: Start difference. First operand 151 states and 213 transitions. Second operand has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 12:23:19,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:23:19,906 INFO L93 Difference]: Finished difference Result 170 states and 225 transitions. [2023-12-02 12:23:19,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 12:23:19,906 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2023-12-02 12:23:19,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:23:19,908 INFO L225 Difference]: With dead ends: 170 [2023-12-02 12:23:19,908 INFO L226 Difference]: Without dead ends: 170 [2023-12-02 12:23:19,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-02 12:23:19,909 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 29 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:23:19,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 485 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:23:19,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-12-02 12:23:19,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 160. [2023-12-02 12:23:19,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 96 states have (on average 1.7916666666666667) internal successors, (172), 126 states have internal predecessors, (172), 22 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (31), 28 states have call predecessors, (31), 22 states have call successors, (31) [2023-12-02 12:23:19,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 225 transitions. [2023-12-02 12:23:19,916 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 225 transitions. Word has length 35 [2023-12-02 12:23:19,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:23:19,917 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 225 transitions. [2023-12-02 12:23:19,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 12:23:19,917 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 225 transitions. [2023-12-02 12:23:19,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-02 12:23:19,918 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:23:19,918 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:23:19,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-02 12:23:19,918 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-12-02 12:23:19,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:23:19,919 INFO L85 PathProgramCache]: Analyzing trace with hash 803429783, now seen corresponding path program 1 times [2023-12-02 12:23:19,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:23:19,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470140262] [2023-12-02 12:23:19,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:23:19,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:23:19,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:23:20,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 12:23:20,011 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:23:20,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470140262] [2023-12-02 12:23:20,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470140262] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:23:20,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:23:20,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 12:23:20,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996753836] [2023-12-02 12:23:20,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:23:20,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 12:23:20,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:23:20,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 12:23:20,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:23:20,013 INFO L87 Difference]: Start difference. First operand 160 states and 225 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 12:23:20,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:23:20,132 INFO L93 Difference]: Finished difference Result 172 states and 237 transitions. [2023-12-02 12:23:20,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 12:23:20,133 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2023-12-02 12:23:20,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:23:20,134 INFO L225 Difference]: With dead ends: 172 [2023-12-02 12:23:20,135 INFO L226 Difference]: Without dead ends: 172 [2023-12-02 12:23:20,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-12-02 12:23:20,136 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 32 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:23:20,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 497 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:23:20,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-12-02 12:23:20,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 161. [2023-12-02 12:23:20,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 97 states have (on average 1.7628865979381443) internal successors, (171), 127 states have internal predecessors, (171), 22 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (31), 28 states have call predecessors, (31), 22 states have call successors, (31) [2023-12-02 12:23:20,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 224 transitions. [2023-12-02 12:23:20,145 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 224 transitions. Word has length 36 [2023-12-02 12:23:20,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:23:20,146 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 224 transitions. [2023-12-02 12:23:20,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 12:23:20,146 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 224 transitions. [2023-12-02 12:23:20,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-02 12:23:20,147 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:23:20,147 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:23:20,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-02 12:23:20,148 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-12-02 12:23:20,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:23:20,149 INFO L85 PathProgramCache]: Analyzing trace with hash 374369863, now seen corresponding path program 2 times [2023-12-02 12:23:20,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:23:20,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544663970] [2023-12-02 12:23:20,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:23:20,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:23:20,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:23:21,047 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 12:23:21,047 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:23:21,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544663970] [2023-12-02 12:23:21,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544663970] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:23:21,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452538622] [2023-12-02 12:23:21,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:23:21,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:23:21,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:23:21,050 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:23:21,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f76994d-58c5-451e-8fd5-8de17ca6ee1d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 12:23:21,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 12:23:21,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:23:21,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 39 conjunts are in the unsatisfiable core [2023-12-02 12:23:21,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:23:21,204 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 6 treesize of output 5 [2023-12-02 12:23:21,217 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2023-12-02 12:23:21,263 WARN L854 $PredicateComparison]: unable to prove that (or (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (exists ((|v_#valid_BEFORE_CALL_217| (Array Int Int))) (let ((.cse0 (@diff |v_#valid_BEFORE_CALL_217| |c_#valid|))) (and (= |c_create_internal_#t~ret7.base| .cse0) (= |v_#valid_BEFORE_CALL_217| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (select |v_#valid_BEFORE_CALL_217| alloc_and_zero_internal_~pi~1.base))) (= |c_#valid| (store |v_#valid_BEFORE_CALL_217| .cse0 (select |c_#valid| .cse0)))))) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0)))) is different from false [2023-12-02 12:23:21,265 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (exists ((|v_#valid_BEFORE_CALL_217| (Array Int Int))) (let ((.cse0 (@diff |v_#valid_BEFORE_CALL_217| |c_#valid|))) (and (= |c_create_internal_#t~ret7.base| .cse0) (= |v_#valid_BEFORE_CALL_217| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (select |v_#valid_BEFORE_CALL_217| alloc_and_zero_internal_~pi~1.base))) (= |c_#valid| (store |v_#valid_BEFORE_CALL_217| .cse0 (select |c_#valid| .cse0)))))) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0)))) is different from true [2023-12-02 12:23:21,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 12:23:21,287 WARN L854 $PredicateComparison]: unable to prove that (or (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (exists ((|v_#valid_BEFORE_CALL_217| (Array Int Int))) (let ((.cse0 (@diff |v_#valid_BEFORE_CALL_217| |c_#valid|))) (and (= (select (select |c_#memory_$Pointer$.base| c_create_internal_~now~0.base) c_create_internal_~now~0.offset) .cse0) (= |v_#valid_BEFORE_CALL_217| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (select |v_#valid_BEFORE_CALL_217| alloc_and_zero_internal_~pi~1.base))) (= |c_#valid| (store |v_#valid_BEFORE_CALL_217| .cse0 (select |c_#valid| .cse0)))))) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0)))) is different from false [2023-12-02 12:23:21,290 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (exists ((|v_#valid_BEFORE_CALL_217| (Array Int Int))) (let ((.cse0 (@diff |v_#valid_BEFORE_CALL_217| |c_#valid|))) (and (= (select (select |c_#memory_$Pointer$.base| c_create_internal_~now~0.base) c_create_internal_~now~0.offset) .cse0) (= |v_#valid_BEFORE_CALL_217| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (select |v_#valid_BEFORE_CALL_217| alloc_and_zero_internal_~pi~1.base))) (= |c_#valid| (store |v_#valid_BEFORE_CALL_217| .cse0 (select |c_#valid| .cse0)))))) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0)))) is different from true [2023-12-02 12:23:21,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 50 [2023-12-02 12:23:21,312 WARN L854 $PredicateComparison]: unable to prove that (or (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) (exists ((v_prenex_16 Int) (|v_#valid_BEFORE_CALL_217| (Array Int Int))) (let ((.cse0 (@diff |v_#valid_BEFORE_CALL_217| |c_#valid|))) (and (= c_create_internal_~now~0.base .cse0) (= (select |c_old(#valid)| v_prenex_16) 0) (= |c_#valid| (store |v_#valid_BEFORE_CALL_217| .cse0 (select |c_#valid| .cse0))) (= |v_#valid_BEFORE_CALL_217| (store |c_old(#valid)| v_prenex_16 (select |v_#valid_BEFORE_CALL_217| v_prenex_16))))))) is different from false [2023-12-02 12:23:23,501 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) (exists ((v_prenex_16 Int) (|v_#valid_BEFORE_CALL_217| (Array Int Int))) (let ((.cse0 (@diff |v_#valid_BEFORE_CALL_217| |c_#valid|))) (and (= c_create_internal_~now~0.base .cse0) (= (select |c_old(#valid)| v_prenex_16) 0) (= |c_#valid| (store |v_#valid_BEFORE_CALL_217| .cse0 (select |c_#valid| .cse0))) (= |v_#valid_BEFORE_CALL_217| (store |c_old(#valid)| v_prenex_16 (select |v_#valid_BEFORE_CALL_217| v_prenex_16))))))) is different from true [2023-12-02 12:23:23,625 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base 1))) is different from true [2023-12-02 12:23:23,693 WARN L854 $PredicateComparison]: unable to prove that (or (exists ((v_alloc_and_zero_internal_~pi~1.base_45 Int)) (and (= |c_#valid| (store |c_old(#valid)| v_alloc_and_zero_internal_~pi~1.base_45 1)) (= (select |c_old(#valid)| v_alloc_and_zero_internal_~pi~1.base_45) 0))) (exists ((|v_#valid_BEFORE_CALL_219| (Array Int Int)) (alloc_and_zero_internal_~pi~1.base Int)) (and (exists ((v_prenex_16 Int) (|v_#valid_BEFORE_CALL_217| (Array Int Int))) (let ((.cse0 (@diff |v_#valid_BEFORE_CALL_217| |v_#valid_BEFORE_CALL_219|))) (and (= |v_#valid_BEFORE_CALL_219| (store |v_#valid_BEFORE_CALL_217| .cse0 (select |v_#valid_BEFORE_CALL_219| .cse0))) (= .cse0 c_create_internal_~now~0.base) (= (select |c_old(#valid)| v_prenex_16) 0) (= |v_#valid_BEFORE_CALL_217| (store |c_old(#valid)| v_prenex_16 (select |v_#valid_BEFORE_CALL_217| v_prenex_16)))))) (= |c_#valid| (store |v_#valid_BEFORE_CALL_219| alloc_and_zero_internal_~pi~1.base 1)))) (exists ((alloc_and_zero_internal_~pi~1.base Int) (v_alloc_and_zero_internal_~pi~1.base_45 Int)) (and (not (= v_alloc_and_zero_internal_~pi~1.base_45 alloc_and_zero_internal_~pi~1.base)) (= (select |c_old(#valid)| v_alloc_and_zero_internal_~pi~1.base_45) 0) (= |c_#valid| (store (store |c_old(#valid)| v_alloc_and_zero_internal_~pi~1.base_45 (select |c_#valid| v_alloc_and_zero_internal_~pi~1.base_45)) alloc_and_zero_internal_~pi~1.base 1))))) is different from false [2023-12-02 12:23:23,699 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((v_alloc_and_zero_internal_~pi~1.base_45 Int)) (and (= |c_#valid| (store |c_old(#valid)| v_alloc_and_zero_internal_~pi~1.base_45 1)) (= (select |c_old(#valid)| v_alloc_and_zero_internal_~pi~1.base_45) 0))) (exists ((|v_#valid_BEFORE_CALL_219| (Array Int Int)) (alloc_and_zero_internal_~pi~1.base Int)) (and (exists ((v_prenex_16 Int) (|v_#valid_BEFORE_CALL_217| (Array Int Int))) (let ((.cse0 (@diff |v_#valid_BEFORE_CALL_217| |v_#valid_BEFORE_CALL_219|))) (and (= |v_#valid_BEFORE_CALL_219| (store |v_#valid_BEFORE_CALL_217| .cse0 (select |v_#valid_BEFORE_CALL_219| .cse0))) (= .cse0 c_create_internal_~now~0.base) (= (select |c_old(#valid)| v_prenex_16) 0) (= |v_#valid_BEFORE_CALL_217| (store |c_old(#valid)| v_prenex_16 (select |v_#valid_BEFORE_CALL_217| v_prenex_16)))))) (= |c_#valid| (store |v_#valid_BEFORE_CALL_219| alloc_and_zero_internal_~pi~1.base 1)))) (exists ((alloc_and_zero_internal_~pi~1.base Int) (v_alloc_and_zero_internal_~pi~1.base_45 Int)) (and (not (= v_alloc_and_zero_internal_~pi~1.base_45 alloc_and_zero_internal_~pi~1.base)) (= (select |c_old(#valid)| v_alloc_and_zero_internal_~pi~1.base_45) 0) (= |c_#valid| (store (store |c_old(#valid)| v_alloc_and_zero_internal_~pi~1.base_45 (select |c_#valid| v_alloc_and_zero_internal_~pi~1.base_45)) alloc_and_zero_internal_~pi~1.base 1))))) is different from true [2023-12-02 12:23:23,766 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (exists ((create_internal_~now~0.base Int)) (= (select |c_#valid| create_internal_~now~0.base) 1)))) (or (exists ((v_prenex_16 Int) (|v_#valid_BEFORE_CALL_219| (Array Int Int)) (alloc_and_zero_internal_~pi~1.base Int) (|v_#valid_BEFORE_CALL_217| (Array Int Int))) (let ((.cse0 (@diff |v_#valid_BEFORE_CALL_217| |v_#valid_BEFORE_CALL_219|))) (and (= |v_#valid_BEFORE_CALL_219| (store |v_#valid_BEFORE_CALL_217| .cse0 (select |v_#valid_BEFORE_CALL_219| .cse0))) (= (select |c_#valid| .cse0) 1) (= (select |c_old(#valid)| v_prenex_16) 0) (= |c_#valid| (store |v_#valid_BEFORE_CALL_219| alloc_and_zero_internal_~pi~1.base 1)) (= |v_#valid_BEFORE_CALL_217| (store |c_old(#valid)| v_prenex_16 (select |v_#valid_BEFORE_CALL_217| v_prenex_16)))))) (and .cse1 (exists ((v_alloc_and_zero_internal_~pi~1.base_45 Int)) (and (= |c_#valid| (store |c_old(#valid)| v_alloc_and_zero_internal_~pi~1.base_45 1)) (= (select |c_old(#valid)| v_alloc_and_zero_internal_~pi~1.base_45) 0)))) (and (exists ((v_alloc_and_zero_internal_~pi~1.base_45 Int) (alloc_and_zero_internal_~pi~1.base Int)) (and (not (= v_alloc_and_zero_internal_~pi~1.base_45 alloc_and_zero_internal_~pi~1.base)) (= (select |c_old(#valid)| v_alloc_and_zero_internal_~pi~1.base_45) 0) (= |c_#valid| (store (store |c_old(#valid)| v_alloc_and_zero_internal_~pi~1.base_45 (select |c_#valid| v_alloc_and_zero_internal_~pi~1.base_45)) alloc_and_zero_internal_~pi~1.base 1)))) .cse1))) is different from false [2023-12-02 12:23:23,772 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse1 (exists ((create_internal_~now~0.base Int)) (= (select |c_#valid| create_internal_~now~0.base) 1)))) (or (exists ((v_prenex_16 Int) (|v_#valid_BEFORE_CALL_219| (Array Int Int)) (alloc_and_zero_internal_~pi~1.base Int) (|v_#valid_BEFORE_CALL_217| (Array Int Int))) (let ((.cse0 (@diff |v_#valid_BEFORE_CALL_217| |v_#valid_BEFORE_CALL_219|))) (and (= |v_#valid_BEFORE_CALL_219| (store |v_#valid_BEFORE_CALL_217| .cse0 (select |v_#valid_BEFORE_CALL_219| .cse0))) (= (select |c_#valid| .cse0) 1) (= (select |c_old(#valid)| v_prenex_16) 0) (= |c_#valid| (store |v_#valid_BEFORE_CALL_219| alloc_and_zero_internal_~pi~1.base 1)) (= |v_#valid_BEFORE_CALL_217| (store |c_old(#valid)| v_prenex_16 (select |v_#valid_BEFORE_CALL_217| v_prenex_16)))))) (and .cse1 (exists ((v_alloc_and_zero_internal_~pi~1.base_45 Int)) (and (= |c_#valid| (store |c_old(#valid)| v_alloc_and_zero_internal_~pi~1.base_45 1)) (= (select |c_old(#valid)| v_alloc_and_zero_internal_~pi~1.base_45) 0)))) (and (exists ((v_alloc_and_zero_internal_~pi~1.base_45 Int) (alloc_and_zero_internal_~pi~1.base Int)) (and (not (= v_alloc_and_zero_internal_~pi~1.base_45 alloc_and_zero_internal_~pi~1.base)) (= (select |c_old(#valid)| v_alloc_and_zero_internal_~pi~1.base_45) 0) (= |c_#valid| (store (store |c_old(#valid)| v_alloc_and_zero_internal_~pi~1.base_45 (select |c_#valid| v_alloc_and_zero_internal_~pi~1.base_45)) alloc_and_zero_internal_~pi~1.base 1)))) .cse1))) is different from true [2023-12-02 12:23:24,409 INFO L349 Elim1Store]: treesize reduction 217, result has 27.9 percent of original size [2023-12-02 12:23:24,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 89 treesize of output 214 [2023-12-02 12:23:26,487 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 7 treesize of output 5 [2023-12-02 12:23:26,557 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 7 treesize of output 5 [2023-12-02 12:23:26,644 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 7 treesize of output 5 [2023-12-02 12:23:26,680 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 7 treesize of output 5 [2023-12-02 12:23:26,755 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 7 treesize of output 5 [2023-12-02 12:23:26,889 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 7 treesize of output 5 [2023-12-02 12:23:26,918 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 7 treesize of output 5 [2023-12-02 12:23:26,972 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 7 treesize of output 5 [2023-12-02 12:23:27,031 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 7 treesize of output 5 [2023-12-02 12:23:27,054 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 7 treesize of output 5 [2023-12-02 12:23:27,102 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 7 treesize of output 5 [2023-12-02 12:23:27,200 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 7 treesize of output 5 [2023-12-02 12:23:27,240 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 7 treesize of output 5 [2023-12-02 12:23:27,297 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 7 treesize of output 5 [2023-12-02 12:23:27,326 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 7 treesize of output 5 [2023-12-02 12:23:27,377 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 7 treesize of output 5 [2023-12-02 12:23:27,449 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 7 treesize of output 5 [2023-12-02 12:23:27,485 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 7 treesize of output 5 [2023-12-02 12:23:27,528 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 7 treesize of output 5 [2023-12-02 12:23:27,563 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 7 treesize of output 5 [2023-12-02 12:23:29,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:23:29,820 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:23:29,821 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:23:29,889 INFO L349 Elim1Store]: treesize reduction 30, result has 23.1 percent of original size [2023-12-02 12:23:29,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 20 [2023-12-02 12:23:29,982 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:23:30,054 INFO L349 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2023-12-02 12:23:30,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 42 [2023-12-02 12:23:30,145 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:23:30,222 INFO L349 Elim1Store]: treesize reduction 43, result has 28.3 percent of original size [2023-12-02 12:23:30,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 34 treesize of output 28 [2023-12-02 12:23:30,239 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:23:30,321 INFO L349 Elim1Store]: treesize reduction 35, result has 41.7 percent of original size [2023-12-02 12:23:30,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 57 treesize of output 55 [2023-12-02 12:23:30,425 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:23:30,460 INFO L349 Elim1Store]: treesize reduction 11, result has 42.1 percent of original size [2023-12-02 12:23:30,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 75 [2023-12-02 12:23:30,674 INFO L349 Elim1Store]: treesize reduction 28, result has 42.9 percent of original size [2023-12-02 12:23:30,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 59 treesize of output 81 [2023-12-02 12:23:31,043 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:23:31,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2023-12-02 12:23:31,093 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:23:31,098 INFO L349 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-12-02 12:23:31,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 7 [2023-12-02 12:23:31,110 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:23:31,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2023-12-02 12:23:31,182 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:23:31,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2023-12-02 12:23:31,214 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:23:31,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2023-12-02 12:23:31,245 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:23:31,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 12 treesize of output 3 [2023-12-02 12:23:31,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:23:31,323 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:23:31,323 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:23:31,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 9 [2023-12-02 12:23:31,339 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:23:31,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2023-12-02 12:23:31,422 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:23:31,455 INFO L349 Elim1Store]: treesize reduction 11, result has 42.1 percent of original size [2023-12-02 12:23:31,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 17 [2023-12-02 12:23:31,500 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:23:31,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2023-12-02 12:23:31,553 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:23:31,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2023-12-02 12:23:31,584 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:23:31,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2023-12-02 12:23:31,784 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:23:31,809 INFO L349 Elim1Store]: treesize reduction 11, result has 42.1 percent of original size [2023-12-02 12:23:31,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 17 [2023-12-02 12:23:31,841 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:23:31,865 INFO L349 Elim1Store]: treesize reduction 11, result has 42.1 percent of original size [2023-12-02 12:23:31,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 17 [2023-12-02 12:23:31,902 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:23:31,908 INFO L349 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-12-02 12:23:31,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 9 [2023-12-02 12:23:31,960 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:23:31,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 12 treesize of output 3 [2023-12-02 12:23:32,131 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:23:32,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2023-12-02 12:23:32,163 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:23:32,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 12 treesize of output 3 [2023-12-02 12:23:32,189 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:23:32,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2023-12-02 12:23:32,443 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:23:32,491 INFO L349 Elim1Store]: treesize reduction 26, result has 33.3 percent of original size [2023-12-02 12:23:32,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 24 [2023-12-02 12:23:32,526 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:23:32,545 INFO L349 Elim1Store]: treesize reduction 15, result has 21.1 percent of original size [2023-12-02 12:23:32,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 58 [2023-12-02 12:23:32,650 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:23:32,670 INFO L349 Elim1Store]: treesize reduction 15, result has 21.1 percent of original size [2023-12-02 12:23:32,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 11 [2023-12-02 12:23:32,713 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:23:32,783 INFO L349 Elim1Store]: treesize reduction 43, result has 28.3 percent of original size [2023-12-02 12:23:32,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 34 treesize of output 28 [2023-12-02 12:23:32,872 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:23:32,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 12 treesize of output 3 [2023-12-02 12:23:32,969 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:23:32,975 INFO L349 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-12-02 12:23:32,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 9 [2023-12-02 12:23:33,001 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:23:33,032 INFO L349 Elim1Store]: treesize reduction 11, result has 42.1 percent of original size [2023-12-02 12:23:33,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 17 [2023-12-02 12:23:36,255 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:23:36,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2023-12-02 12:23:36,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2023-12-02 12:23:36,313 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2023-12-02 12:23:36,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2023-12-02 12:23:36,415 INFO L349 Elim1Store]: treesize reduction 36, result has 18.2 percent of original size [2023-12-02 12:23:36,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 102 [2023-12-02 12:23:36,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:23:36,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:23:36,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:23:36,508 INFO L349 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2023-12-02 12:23:36,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 48 [2023-12-02 12:23:36,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-02 12:23:36,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2023-12-02 12:23:36,602 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:23:36,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2023-12-02 12:23:36,628 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 12 treesize of output 1 [2023-12-02 12:23:36,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:23:36,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:23:36,671 INFO L349 Elim1Store]: treesize reduction 62, result has 1.6 percent of original size [2023-12-02 12:23:36,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 59 [2023-12-02 12:23:36,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2023-12-02 12:23:36,785 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2023-12-02 12:23:36,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2023-12-02 12:23:36,856 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-12-02 12:23:36,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 15 [2023-12-02 12:23:36,874 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:23:36,875 INFO L349 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-12-02 12:23:36,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 8 [2023-12-02 12:24:02,403 WARN L293 SmtUtils]: Spent 23.97s on a formula simplification. DAG size of input: 616 DAG size of output: 404 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-12-02 12:24:02,403 INFO L349 Elim1Store]: treesize reduction 1000, result has 47.0 percent of original size [2023-12-02 12:24:02,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 5 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 15 new quantified variables, introduced 95 case distinctions, treesize of input 721 treesize of output 1694 [2023-12-02 12:34:13,891 WARN L293 SmtUtils]: Spent 11.13s on a formula simplification. DAG size of input: 1253 DAG size of output: 1348 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)