./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-broom/sll-nested-sll-inline.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_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/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_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-broom/sll-nested-sll-inline.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/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_4a460297-0eca-4306-95ce-52550224948a/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 2a031cd83911a702ba38b9e8637ad5ead7999efd0a578b82d9c2168fee0ee72e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 14:42:55,076 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 14:42:55,142 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2023-12-02 14:42:55,146 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 14:42:55,147 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 14:42:55,169 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 14:42:55,169 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 14:42:55,170 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 14:42:55,171 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 14:42:55,171 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 14:42:55,172 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 14:42:55,172 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 14:42:55,173 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 14:42:55,173 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 14:42:55,174 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 14:42:55,174 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 14:42:55,175 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 14:42:55,175 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 14:42:55,175 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 14:42:55,176 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 14:42:55,177 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 14:42:55,177 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 14:42:55,178 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 14:42:55,178 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 14:42:55,179 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 14:42:55,179 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 14:42:55,180 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 14:42:55,180 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 14:42:55,180 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 14:42:55,181 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 14:42:55,181 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 14:42:55,182 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 14:42:55,182 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 14:42:55,182 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 14:42:55,183 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 14:42:55,183 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 14:42:55,183 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 14:42:55,183 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:42:55,183 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 14:42:55,184 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 14:42:55,184 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 14:42:55,184 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 14:42:55,184 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 14:42:55,184 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 14:42:55,185 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 14:42:55,185 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_4a460297-0eca-4306-95ce-52550224948a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a031cd83911a702ba38b9e8637ad5ead7999efd0a578b82d9c2168fee0ee72e [2023-12-02 14:42:55,384 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 14:42:55,405 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 14:42:55,408 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 14:42:55,409 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 14:42:55,410 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 14:42:55,411 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/memsafety-broom/sll-nested-sll-inline.i [2023-12-02 14:42:58,115 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 14:42:58,362 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 14:42:58,362 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/sv-benchmarks/c/memsafety-broom/sll-nested-sll-inline.i [2023-12-02 14:42:58,388 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/data/4a39b4b51/fb54972aabdc4fd09d02fd05e8003da4/FLAGacf2d657f [2023-12-02 14:42:58,401 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/data/4a39b4b51/fb54972aabdc4fd09d02fd05e8003da4 [2023-12-02 14:42:58,403 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 14:42:58,404 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 14:42:58,406 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 14:42:58,406 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 14:42:58,411 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 14:42:58,411 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:42:58" (1/1) ... [2023-12-02 14:42:58,412 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c273a68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:42:58, skipping insertion in model container [2023-12-02 14:42:58,412 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:42:58" (1/1) ... [2023-12-02 14:42:58,509 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 14:42:58,758 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:42:58,766 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 14:42:58,806 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:42:58,831 INFO L206 MainTranslator]: Completed translation [2023-12-02 14:42:58,831 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:42:58 WrapperNode [2023-12-02 14:42:58,831 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 14:42:58,832 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 14:42:58,833 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 14:42:58,833 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 14:42:58,838 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:42:58" (1/1) ... [2023-12-02 14:42:58,852 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:42:58" (1/1) ... [2023-12-02 14:42:58,874 INFO L138 Inliner]: procedures = 119, calls = 33, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 120 [2023-12-02 14:42:58,875 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 14:42:58,876 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 14:42:58,876 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 14:42:58,876 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 14:42:58,884 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:42:58" (1/1) ... [2023-12-02 14:42:58,884 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:42:58" (1/1) ... [2023-12-02 14:42:58,888 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:42:58" (1/1) ... [2023-12-02 14:42:58,889 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:42:58" (1/1) ... [2023-12-02 14:42:58,898 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:42:58" (1/1) ... [2023-12-02 14:42:58,902 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:42:58" (1/1) ... [2023-12-02 14:42:58,904 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:42:58" (1/1) ... [2023-12-02 14:42:58,906 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:42:58" (1/1) ... [2023-12-02 14:42:58,910 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 14:42:58,911 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 14:42:58,911 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 14:42:58,911 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 14:42:58,912 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:42:58" (1/1) ... [2023-12-02 14:42:58,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:42:58,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:42:58,940 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 14:42:58,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 14:42:58,978 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero_internal [2023-12-02 14:42:58,978 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero_internal [2023-12-02 14:42:58,978 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero [2023-12-02 14:42:58,978 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero [2023-12-02 14:42:58,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 14:42:58,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 14:42:58,979 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 14:42:58,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 14:42:58,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 14:42:58,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 14:42:59,089 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 14:42:59,091 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 14:42:59,394 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 14:42:59,453 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 14:42:59,453 INFO L309 CfgBuilder]: Removed 7 assume(true) statements. [2023-12-02 14:42:59,455 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:42:59 BoogieIcfgContainer [2023-12-02 14:42:59,455 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 14:42:59,458 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 14:42:59,458 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 14:42:59,461 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 14:42:59,462 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:42:58" (1/3) ... [2023-12-02 14:42:59,462 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7beb811a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:42:59, skipping insertion in model container [2023-12-02 14:42:59,463 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:42:58" (2/3) ... [2023-12-02 14:42:59,463 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7beb811a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:42:59, skipping insertion in model container [2023-12-02 14:42:59,463 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:42:59" (3/3) ... [2023-12-02 14:42:59,464 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-nested-sll-inline.i [2023-12-02 14:42:59,484 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 14:42:59,484 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 43 error locations. [2023-12-02 14:42:59,532 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 14:42:59,539 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;@bf5bf19, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 14:42:59,539 INFO L358 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2023-12-02 14:42:59,543 INFO L276 IsEmpty]: Start isEmpty. Operand has 94 states, 42 states have (on average 2.261904761904762) internal successors, (95), 85 states have internal predecessors, (95), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 14:42:59,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 14:42:59,550 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:42:59,551 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 14:42:59,551 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:42:59,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:42:59,557 INFO L85 PathProgramCache]: Analyzing trace with hash 7603434, now seen corresponding path program 1 times [2023-12-02 14:42:59,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:42:59,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872266813] [2023-12-02 14:42:59,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:42:59,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:42:59,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:42:59,767 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 14:42:59,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:42:59,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872266813] [2023-12-02 14:42:59,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872266813] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:42:59,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:42:59,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 14:42:59,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90207955] [2023-12-02 14:42:59,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:42:59,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:42:59,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:42:59,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:42:59,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:42:59,806 INFO L87 Difference]: Start difference. First operand has 94 states, 42 states have (on average 2.261904761904762) internal successors, (95), 85 states have internal predecessors, (95), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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 14:42:59,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:42:59,922 INFO L93 Difference]: Finished difference Result 92 states and 102 transitions. [2023-12-02 14:42:59,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:42:59,925 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 14:42:59,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:42:59,942 INFO L225 Difference]: With dead ends: 92 [2023-12-02 14:42:59,943 INFO L226 Difference]: Without dead ends: 91 [2023-12-02 14:42:59,944 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 14:42:59,948 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 4 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:42:59,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 127 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:42:59,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-12-02 14:42:59,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2023-12-02 14:42:59,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 42 states have (on average 2.119047619047619) internal successors, (89), 82 states have internal predecessors, (89), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 14:42:59,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2023-12-02 14:42:59,992 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 4 [2023-12-02 14:42:59,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:42:59,993 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2023-12-02 14:42:59,993 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 14:42:59,993 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2023-12-02 14:42:59,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 14:42:59,993 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:42:59,994 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 14:42:59,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 14:42:59,994 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:42:59,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:42:59,996 INFO L85 PathProgramCache]: Analyzing trace with hash 7603435, now seen corresponding path program 1 times [2023-12-02 14:42:59,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:42:59,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271140453] [2023-12-02 14:42:59,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:42:59,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:43:00,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:00,085 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 14:43:00,085 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:43:00,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271140453] [2023-12-02 14:43:00,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271140453] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:43:00,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:43:00,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 14:43:00,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867460470] [2023-12-02 14:43:00,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:43:00,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:43:00,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:43:00,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:43:00,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:43:00,089 INFO L87 Difference]: Start difference. First operand 91 states and 101 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 14:43:00,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:43:00,180 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2023-12-02 14:43:00,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:43:00,180 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 14:43:00,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:43:00,182 INFO L225 Difference]: With dead ends: 89 [2023-12-02 14:43:00,182 INFO L226 Difference]: Without dead ends: 89 [2023-12-02 14:43:00,182 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 14:43:00,184 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 2 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:43:00,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 132 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:43:00,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-12-02 14:43:00,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2023-12-02 14:43:00,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 80 states have internal predecessors, (87), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 14:43:00,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2023-12-02 14:43:00,194 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 4 [2023-12-02 14:43:00,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:43:00,194 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2023-12-02 14:43:00,194 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 14:43:00,195 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2023-12-02 14:43:00,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 14:43:00,195 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:43:00,195 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:43:00,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 14:43:00,196 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting alloc_and_zero_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:43:00,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:43:00,196 INFO L85 PathProgramCache]: Analyzing trace with hash 36302357, now seen corresponding path program 1 times [2023-12-02 14:43:00,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:43:00,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56843756] [2023-12-02 14:43:00,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:00,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:43:00,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:00,277 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 14:43:00,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:43:00,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56843756] [2023-12-02 14:43:00,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56843756] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:43:00,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:43:00,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 14:43:00,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395648568] [2023-12-02 14:43:00,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:43:00,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:43:00,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:43:00,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:43:00,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:43:00,281 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 14:43:00,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:43:00,365 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2023-12-02 14:43:00,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:43:00,366 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-12-02 14:43:00,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:43:00,367 INFO L225 Difference]: With dead ends: 88 [2023-12-02 14:43:00,367 INFO L226 Difference]: Without dead ends: 88 [2023-12-02 14:43:00,368 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 14:43:00,369 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 2 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 123 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 14:43:00,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 123 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:43:00,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-12-02 14:43:00,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-12-02 14:43:00,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 79 states have internal predecessors, (86), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 14:43:00,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2023-12-02 14:43:00,379 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 10 [2023-12-02 14:43:00,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:43:00,381 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2023-12-02 14:43:00,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 14:43:00,381 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2023-12-02 14:43:00,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 14:43:00,381 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:43:00,382 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:43:00,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 14:43:00,382 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting alloc_and_zero_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:43:00,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:43:00,383 INFO L85 PathProgramCache]: Analyzing trace with hash 36302358, now seen corresponding path program 1 times [2023-12-02 14:43:00,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:43:00,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955999547] [2023-12-02 14:43:00,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:00,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:43:00,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:00,475 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 14:43:00,475 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:43:00,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955999547] [2023-12-02 14:43:00,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955999547] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:43:00,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:43:00,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 14:43:00,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282109371] [2023-12-02 14:43:00,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:43:00,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:43:00,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:43:00,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:43:00,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:43:00,478 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 14:43:00,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:43:00,553 INFO L93 Difference]: Finished difference Result 87 states and 97 transitions. [2023-12-02 14:43:00,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:43:00,554 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-12-02 14:43:00,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:43:00,555 INFO L225 Difference]: With dead ends: 87 [2023-12-02 14:43:00,555 INFO L226 Difference]: Without dead ends: 87 [2023-12-02 14:43:00,555 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 14:43:00,556 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 1 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:43:00,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 128 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:43:00,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-12-02 14:43:00,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2023-12-02 14:43:00,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 78 states have internal predecessors, (85), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 14:43:00,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2023-12-02 14:43:00,565 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 10 [2023-12-02 14:43:00,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:43:00,566 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2023-12-02 14:43:00,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 14:43:00,566 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2023-12-02 14:43:00,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 14:43:00,567 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:43:00,567 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:43:00,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 14:43:00,567 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:43:00,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:43:00,568 INFO L85 PathProgramCache]: Analyzing trace with hash 2067485473, now seen corresponding path program 1 times [2023-12-02 14:43:00,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:43:00,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354254926] [2023-12-02 14:43:00,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:00,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:43:00,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:00,797 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 14:43:00,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:43:00,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354254926] [2023-12-02 14:43:00,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354254926] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:43:00,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:43:00,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 14:43:00,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133817400] [2023-12-02 14:43:00,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:43:00,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 14:43:00,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:43:00,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 14:43:00,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-12-02 14:43:00,801 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand has 9 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:43:01,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:43:01,171 INFO L93 Difference]: Finished difference Result 90 states and 102 transitions. [2023-12-02 14:43:01,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 14:43:01,172 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2023-12-02 14:43:01,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:43:01,173 INFO L225 Difference]: With dead ends: 90 [2023-12-02 14:43:01,173 INFO L226 Difference]: Without dead ends: 90 [2023-12-02 14:43:01,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 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 14:43:01,175 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 34 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:43:01,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 248 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 14:43:01,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-12-02 14:43:01,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2023-12-02 14:43:01,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 78 states have internal predecessors, (87), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 14:43:01,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions. [2023-12-02 14:43:01,183 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 15 [2023-12-02 14:43:01,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:43:01,183 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions. [2023-12-02 14:43:01,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:43:01,184 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions. [2023-12-02 14:43:01,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 14:43:01,184 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:43:01,184 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:43:01,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 14:43:01,185 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:43:01,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:43:01,185 INFO L85 PathProgramCache]: Analyzing trace with hash 2067485474, now seen corresponding path program 1 times [2023-12-02 14:43:01,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:43:01,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78714609] [2023-12-02 14:43:01,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:01,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:43:01,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:01,531 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 14:43:01,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:43:01,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78714609] [2023-12-02 14:43:01,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78714609] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:43:01,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:43:01,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-12-02 14:43:01,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110389803] [2023-12-02 14:43:01,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:43:01,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 14:43:01,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:43:01,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 14:43:01,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-12-02 14:43:01,533 INFO L87 Difference]: Start difference. First operand 88 states and 101 transitions. Second operand has 11 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:43:01,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:43:01,992 INFO L93 Difference]: Finished difference Result 107 states and 127 transitions. [2023-12-02 14:43:01,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 14:43:01,995 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2023-12-02 14:43:01,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:43:01,997 INFO L225 Difference]: With dead ends: 107 [2023-12-02 14:43:01,997 INFO L226 Difference]: Without dead ends: 107 [2023-12-02 14:43:01,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 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 14:43:01,999 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 16 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 14:43:01,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 312 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 14:43:02,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-12-02 14:43:02,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 102. [2023-12-02 14:43:02,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 57 states have (on average 1.8245614035087718) internal successors, (104), 90 states have internal predecessors, (104), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 14:43:02,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 122 transitions. [2023-12-02 14:43:02,009 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 122 transitions. Word has length 15 [2023-12-02 14:43:02,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:43:02,009 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 122 transitions. [2023-12-02 14:43:02,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:43:02,010 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 122 transitions. [2023-12-02 14:43:02,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 14:43:02,010 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:43:02,011 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:43:02,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 14:43:02,011 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:43:02,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:43:02,012 INFO L85 PathProgramCache]: Analyzing trace with hash 94334936, now seen corresponding path program 1 times [2023-12-02 14:43:02,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:43:02,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430755331] [2023-12-02 14:43:02,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:02,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:43:02,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:02,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:43:02,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:43:02,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430755331] [2023-12-02 14:43:02,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430755331] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:43:02,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511925441] [2023-12-02 14:43:02,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:02,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:43:02,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:43:02,200 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:43:02,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 14:43:02,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:02,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 14:43:02,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:43:02,417 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 14:43:02,462 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 14:43:02,498 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-12-02 14:43:02,499 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 14:43:02,505 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 14:43:02,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:43:02,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511925441] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:43:02,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1694876863] [2023-12-02 14:43:02,575 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 14:43:02,575 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:43:02,579 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:43:02,582 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:43:02,583 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:43:03,100 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 103 for LOIs [2023-12-02 14:43:03,178 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 19 for LOIs [2023-12-02 14:43:03,215 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:43:05,886 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1309#(and (<= 1 |#StackHeapBarrier|) (or (and (exists ((|v_#valid_110| (Array Int Int))) (and (= |#valid| (store |v_#valid_110| |ULTIMATE.start_create_#t~ret8#1.base| 1)) (= (select |v_#valid_110| |ULTIMATE.start_create_#t~ret8#1.base|) 0))) (not (= |ULTIMATE.start_create_~sll~0#1.base| 0)) (exists ((|v_#length_92| (Array Int Int))) (= (store |v_#length_92| |ULTIMATE.start_create_#t~ret8#1.base| 8) |#length|)) (<= (+ |ULTIMATE.start_create_#t~ret8#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.offset_96| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_96| |ULTIMATE.start_create_#t~ret8#1.base| (store (select |v_#memory_$Pointer$.offset_96| |ULTIMATE.start_create_#t~ret8#1.base|) 0 0)))) (= |ULTIMATE.start_create_~sll~0#1.base| |ULTIMATE.start_create_~now~0#1.base|) (exists ((|v_#valid_109| (Array Int Int))) (= (select |v_#valid_109| |ULTIMATE.start_create_~sll~0#1.base|) 0)) (= |ULTIMATE.start_create_~nested~0#1.base| |ULTIMATE.start_create_~nested_now~0#1.base|) (not (= |ULTIMATE.start_create_#t~ret8#1.base| 0)) (<= (+ |ULTIMATE.start_create_~sll~0#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#valid_111| (Array Int Int))) (= (select |v_#valid_111| |ULTIMATE.start_create_~nested~0#1.base|) 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= (+ |ULTIMATE.start_create_~nested~0#1.base| 1) |#StackHeapBarrier|) (not (= |ULTIMATE.start_create_~nested~0#1.base| 0)) (exists ((|v_#memory_$Pointer$.base_95| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_95| |ULTIMATE.start_create_#t~ret8#1.base| (store (select |v_#memory_$Pointer$.base_95| |ULTIMATE.start_create_#t~ret8#1.base|) 0 0)) |#memory_$Pointer$.base|)) (exists ((|v_ULTIMATE.start_create_#t~nondet7#1_12| Int)) (and (<= |v_ULTIMATE.start_create_#t~nondet7#1_12| 2147483647) (<= 0 (+ |v_ULTIMATE.start_create_#t~nondet7#1_12| 2147483648)) (not (= |v_ULTIMATE.start_create_#t~nondet7#1_12| 0))))) (and (exists ((|v_#memory_$Pointer$.offset_95| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_95| |ULTIMATE.start_create_#t~ret8#1.base| (store (select |v_#memory_$Pointer$.offset_95| |ULTIMATE.start_create_#t~ret8#1.base|) 0 0)))) (not (= |ULTIMATE.start_create_~sll~0#1.base| 0)) (exists ((|v_#length_92| (Array Int Int))) (= (store |v_#length_92| |ULTIMATE.start_create_#t~ret8#1.base| 8) |#length|)) (<= (+ |ULTIMATE.start_create_#t~ret8#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.base_97| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_97| |ULTIMATE.start_create_#t~ret8#1.base| (store (select |v_#memory_$Pointer$.base_97| |ULTIMATE.start_create_#t~ret8#1.base|) 0 0)))) (= |ULTIMATE.start_create_~sll~0#1.base| |ULTIMATE.start_create_~now~0#1.base|) (exists ((|v_#valid_110| (Array Int Int))) (= (select |v_#valid_110| |ULTIMATE.start_create_~nested~0#1.base|) 0)) (exists ((|v_#valid_109| (Array Int Int))) (= (select |v_#valid_109| |ULTIMATE.start_create_~sll~0#1.base|) 0)) (exists ((|v_#valid_112| (Array Int Int))) (and (= (store |v_#valid_112| |ULTIMATE.start_create_#t~ret8#1.base| 1) |#valid|) (= (select |v_#valid_112| |ULTIMATE.start_create_#t~ret8#1.base|) 0))) (= |ULTIMATE.start_create_~nested~0#1.base| |ULTIMATE.start_create_~nested_now~0#1.base|) (not (= |ULTIMATE.start_create_#t~ret8#1.base| 0)) (<= (+ |ULTIMATE.start_create_~sll~0#1.base| 1) |#StackHeapBarrier|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= (+ |ULTIMATE.start_create_~nested~0#1.base| 1) |#StackHeapBarrier|) (not (= |ULTIMATE.start_create_~nested~0#1.base| 0)) (exists ((|v_ULTIMATE.start_create_#t~nondet7#1_12| Int)) (and (<= |v_ULTIMATE.start_create_#t~nondet7#1_12| 2147483647) (<= 0 (+ |v_ULTIMATE.start_create_#t~nondet7#1_12| 2147483648)) (not (= |v_ULTIMATE.start_create_#t~nondet7#1_12| 0)))))) (= |ULTIMATE.start_create_~nested~0#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_create_~nested_now~0#1.base|) 1)) (= |ULTIMATE.start_create_~nested_now~0#1.offset| 0) (= |ULTIMATE.start_create_~now~0#1.offset| 0) (= |ULTIMATE.start_create_~sll~0#1.offset| 0) (= |ULTIMATE.start_create_#t~ret8#1.offset| 0))' at error location [2023-12-02 14:43:05,886 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:43:05,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 14:43:05,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-12-02 14:43:05,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141638584] [2023-12-02 14:43:05,886 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 14:43:05,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 14:43:05,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:43:05,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 14:43:05,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=528, Unknown=1, NotChecked=46, Total=650 [2023-12-02 14:43:05,888 INFO L87 Difference]: Start difference. First operand 102 states and 122 transitions. Second operand has 10 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 14:43:06,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:43:06,224 INFO L93 Difference]: Finished difference Result 104 states and 125 transitions. [2023-12-02 14:43:06,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 14:43:06,225 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 19 [2023-12-02 14:43:06,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:43:06,226 INFO L225 Difference]: With dead ends: 104 [2023-12-02 14:43:06,226 INFO L226 Difference]: Without dead ends: 104 [2023-12-02 14:43:06,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=90, Invalid=615, Unknown=1, NotChecked=50, Total=756 [2023-12-02 14:43:06,227 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 14 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 14:43:06,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 280 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 338 Invalid, 0 Unknown, 108 Unchecked, 0.2s Time] [2023-12-02 14:43:06,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-12-02 14:43:06,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2023-12-02 14:43:06,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 58 states have (on average 1.793103448275862) internal successors, (104), 89 states have internal predecessors, (104), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 14:43:06,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 124 transitions. [2023-12-02 14:43:06,235 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 124 transitions. Word has length 19 [2023-12-02 14:43:06,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:43:06,235 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 124 transitions. [2023-12-02 14:43:06,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 14:43:06,236 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 124 transitions. [2023-12-02 14:43:06,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 14:43:06,236 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:43:06,237 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:43:06,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 14:43:06,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:43:06,443 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:43:06,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:43:06,443 INFO L85 PathProgramCache]: Analyzing trace with hash 94334937, now seen corresponding path program 1 times [2023-12-02 14:43:06,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:43:06,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281017741] [2023-12-02 14:43:06,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:06,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:43:06,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:06,662 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 14:43:06,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:43:06,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281017741] [2023-12-02 14:43:06,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281017741] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:43:06,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576640237] [2023-12-02 14:43:06,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:06,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:43:06,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:43:06,664 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:43:06,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 14:43:06,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:06,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-02 14:43:06,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:43:06,748 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 14:43:06,756 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 14:43:06,878 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 14:43:06,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:43:06,898 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 14:43:06,906 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 14:43:06,906 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 14:43:06,926 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 14:43:06,926 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:43:07,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576640237] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:43:07,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [332330477] [2023-12-02 14:43:07,071 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 14:43:07,071 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:43:07,071 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:43:07,071 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:43:07,072 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:43:07,418 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 105 for LOIs [2023-12-02 14:43:07,489 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 19 for LOIs [2023-12-02 14:43:07,502 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:43:07,510 WARN L876 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_create_~nested~0#1.offset| 0) (<= (select |c_#length| |c_ULTIMATE.start_create_~nested_now~0#1.base|) 7) (<= 1 |c_#StackHeapBarrier|) (= |c_ULTIMATE.start_create_~now~0#1.offset| 0) (= |c_ULTIMATE.start_create_~nested_now~0#1.offset| 0) (= 0 |c_ULTIMATE.start_create_#t~ret8#1.offset|) (= |c_ULTIMATE.start_create_~sll~0#1.offset| 0) (let ((.cse0 (= |c_ULTIMATE.start_create_~sll~0#1.base| |c_ULTIMATE.start_create_~now~0#1.base|)) (.cse1 (<= (+ |c_ULTIMATE.start_create_#t~ret8#1.base| 1) |c_#StackHeapBarrier|)) (.cse2 (exists ((|v_#valid_122| (Array Int Int))) (= (select |v_#valid_122| |c_ULTIMATE.start_create_~sll~0#1.base|) 0))) (.cse3 (exists ((|v_ULTIMATE.start_create_#t~nondet7#1_13| Int)) (and (<= 0 (+ |v_ULTIMATE.start_create_#t~nondet7#1_13| 2147483648)) (<= |v_ULTIMATE.start_create_#t~nondet7#1_13| 2147483647) (not (= |v_ULTIMATE.start_create_#t~nondet7#1_13| 0))))) (.cse4 (not (= |c_ULTIMATE.start_create_~nested~0#1.base| 0))) (.cse5 (= (select |c_#valid| |c_ULTIMATE.start_create_#t~ret8#1.base|) 1)) (.cse6 (= (select |c_ULTIMATE.start_main_old_#valid#1| 0) 0)) (.cse7 (exists ((|v_#length_106| (Array Int Int))) (= (store |v_#length_106| |c_ULTIMATE.start_create_#t~ret8#1.base| 8) |c_#length|))) (.cse8 (<= (+ |c_ULTIMATE.start_create_~nested~0#1.base| 1) |c_#StackHeapBarrier|)) (.cse9 (<= 8 (select |c_#length| |c_ULTIMATE.start_create_#t~ret8#1.base|))) (.cse10 (exists ((|v_#memory_$Pointer$.base_107| (Array Int (Array Int Int)))) (= |c_#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_107| |c_ULTIMATE.start_create_#t~ret8#1.base| (store (select |v_#memory_$Pointer$.base_107| |c_ULTIMATE.start_create_#t~ret8#1.base|) 0 0))))) (.cse11 (not (= |c_ULTIMATE.start_create_#t~ret8#1.base| 0))) (.cse12 (<= (+ |c_ULTIMATE.start_create_~sll~0#1.base| 1) |c_#StackHeapBarrier|)) (.cse13 (not (= |c_ULTIMATE.start_create_~sll~0#1.base| 0))) (.cse14 (= |c_ULTIMATE.start_create_~nested~0#1.base| |c_ULTIMATE.start_create_~nested_now~0#1.base|))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 (exists ((|v_#valid_124| (Array Int Int))) (= (select |v_#valid_124| |c_ULTIMATE.start_create_~nested~0#1.base|) 0)) .cse8 .cse9 .cse10 .cse11 (exists ((|v_#valid_123| (Array Int Int))) (and (= |c_#valid| (store |v_#valid_123| |c_ULTIMATE.start_create_#t~ret8#1.base| 1)) (= (select |v_#valid_123| |c_ULTIMATE.start_create_#t~ret8#1.base|) 0))) .cse12 (exists ((|v_#memory_$Pointer$.offset_108| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.offset_108| |c_ULTIMATE.start_create_#t~ret8#1.base| (store (select |v_#memory_$Pointer$.offset_108| |c_ULTIMATE.start_create_#t~ret8#1.base|) 0 0)) |c_#memory_$Pointer$.offset|)) .cse13 .cse14) (and .cse0 .cse1 .cse2 (exists ((|v_#valid_123| (Array Int Int))) (= (select |v_#valid_123| |c_ULTIMATE.start_create_~nested~0#1.base|) 0)) .cse3 .cse4 .cse5 (exists ((|v_#valid_125| (Array Int Int))) (and (= |c_#valid| (store |v_#valid_125| |c_ULTIMATE.start_create_#t~ret8#1.base| 1)) (= (select |v_#valid_125| |c_ULTIMATE.start_create_#t~ret8#1.base|) 0))) .cse6 .cse7 .cse8 .cse9 (exists ((|v_#memory_$Pointer$.offset_107| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.offset_107| |c_ULTIMATE.start_create_#t~ret8#1.base| (store (select |v_#memory_$Pointer$.offset_107| |c_ULTIMATE.start_create_#t~ret8#1.base|) 0 0)) |c_#memory_$Pointer$.offset|)) .cse10 .cse11 .cse12 .cse13 .cse14)))) is different from true [2023-12-02 14:43:09,734 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1612#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_create_~nested~0#1.offset| 0) (<= (select |#length| |ULTIMATE.start_create_~nested_now~0#1.base|) 7) (= |ULTIMATE.start_create_~nested_now~0#1.offset| 0) (or (and (= (select |#valid| |ULTIMATE.start_create_#t~ret8#1.base|) 1) (<= 8 (select |#length| |ULTIMATE.start_create_#t~ret8#1.base|)) (not (= |ULTIMATE.start_create_~sll~0#1.base| 0)) (exists ((|v_#memory_$Pointer$.offset_108| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_108| |ULTIMATE.start_create_#t~ret8#1.base| (store (select |v_#memory_$Pointer$.offset_108| |ULTIMATE.start_create_#t~ret8#1.base|) 0 0)))) (exists ((|v_ULTIMATE.start_create_#t~nondet7#1_13| Int)) (and (<= 0 (+ |v_ULTIMATE.start_create_#t~nondet7#1_13| 2147483648)) (<= |v_ULTIMATE.start_create_#t~nondet7#1_13| 2147483647) (not (= |v_ULTIMATE.start_create_#t~nondet7#1_13| 0)))) (<= (+ |ULTIMATE.start_create_#t~ret8#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.base_107| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_107| |ULTIMATE.start_create_#t~ret8#1.base| (store (select |v_#memory_$Pointer$.base_107| |ULTIMATE.start_create_#t~ret8#1.base|) 0 0)))) (= |ULTIMATE.start_create_~sll~0#1.base| |ULTIMATE.start_create_~now~0#1.base|) (exists ((|v_#valid_123| (Array Int Int))) (and (= (store |v_#valid_123| |ULTIMATE.start_create_#t~ret8#1.base| 1) |#valid|) (= (select |v_#valid_123| |ULTIMATE.start_create_#t~ret8#1.base|) 0))) (= |ULTIMATE.start_create_~nested~0#1.base| |ULTIMATE.start_create_~nested_now~0#1.base|) (not (= |ULTIMATE.start_create_#t~ret8#1.base| 0)) (<= (+ |ULTIMATE.start_create_~sll~0#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#valid_124| (Array Int Int))) (= (select |v_#valid_124| |ULTIMATE.start_create_~nested~0#1.base|) 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= (+ |ULTIMATE.start_create_~nested~0#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#length_106| (Array Int Int))) (= |#length| (store |v_#length_106| |ULTIMATE.start_create_#t~ret8#1.base| 8))) (exists ((|v_#valid_122| (Array Int Int))) (= (select |v_#valid_122| |ULTIMATE.start_create_~sll~0#1.base|) 0)) (not (= |ULTIMATE.start_create_~nested~0#1.base| 0))) (and (exists ((|v_#memory_$Pointer$.offset_107| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_107| |ULTIMATE.start_create_#t~ret8#1.base| (store (select |v_#memory_$Pointer$.offset_107| |ULTIMATE.start_create_#t~ret8#1.base|) 0 0)))) (= (select |#valid| |ULTIMATE.start_create_#t~ret8#1.base|) 1) (<= 8 (select |#length| |ULTIMATE.start_create_#t~ret8#1.base|)) (not (= |ULTIMATE.start_create_~sll~0#1.base| 0)) (exists ((|v_#valid_125| (Array Int Int))) (and (= (store |v_#valid_125| |ULTIMATE.start_create_#t~ret8#1.base| 1) |#valid|) (= (select |v_#valid_125| |ULTIMATE.start_create_#t~ret8#1.base|) 0))) (exists ((|v_ULTIMATE.start_create_#t~nondet7#1_13| Int)) (and (<= 0 (+ |v_ULTIMATE.start_create_#t~nondet7#1_13| 2147483648)) (<= |v_ULTIMATE.start_create_#t~nondet7#1_13| 2147483647) (not (= |v_ULTIMATE.start_create_#t~nondet7#1_13| 0)))) (<= (+ |ULTIMATE.start_create_#t~ret8#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.base_107| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_107| |ULTIMATE.start_create_#t~ret8#1.base| (store (select |v_#memory_$Pointer$.base_107| |ULTIMATE.start_create_#t~ret8#1.base|) 0 0)))) (exists ((|v_#valid_123| (Array Int Int))) (= (select |v_#valid_123| |ULTIMATE.start_create_~nested~0#1.base|) 0)) (= |ULTIMATE.start_create_~sll~0#1.base| |ULTIMATE.start_create_~now~0#1.base|) (= |ULTIMATE.start_create_~nested~0#1.base| |ULTIMATE.start_create_~nested_now~0#1.base|) (not (= |ULTIMATE.start_create_#t~ret8#1.base| 0)) (<= (+ |ULTIMATE.start_create_~sll~0#1.base| 1) |#StackHeapBarrier|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= (+ |ULTIMATE.start_create_~nested~0#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#length_106| (Array Int Int))) (= |#length| (store |v_#length_106| |ULTIMATE.start_create_#t~ret8#1.base| 8))) (exists ((|v_#valid_122| (Array Int Int))) (= (select |v_#valid_122| |ULTIMATE.start_create_~sll~0#1.base|) 0)) (not (= |ULTIMATE.start_create_~nested~0#1.base| 0)))) (= |ULTIMATE.start_create_~now~0#1.offset| 0) (= |ULTIMATE.start_create_~sll~0#1.offset| 0) (= |ULTIMATE.start_create_#t~ret8#1.offset| 0))' at error location [2023-12-02 14:43:09,734 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:43:09,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 14:43:09,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-12-02 14:43:09,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23689759] [2023-12-02 14:43:09,735 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 14:43:09,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 14:43:09,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:43:09,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 14:43:09,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=834, Unknown=2, NotChecked=118, Total=1056 [2023-12-02 14:43:09,737 INFO L87 Difference]: Start difference. First operand 102 states and 124 transitions. Second operand has 16 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 14:43:10,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:43:10,154 INFO L93 Difference]: Finished difference Result 104 states and 125 transitions. [2023-12-02 14:43:10,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 14:43:10,154 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 19 [2023-12-02 14:43:10,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:43:10,155 INFO L225 Difference]: With dead ends: 104 [2023-12-02 14:43:10,156 INFO L226 Difference]: Without dead ends: 104 [2023-12-02 14:43:10,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=134, Invalid=1062, Unknown=2, NotChecked=134, Total=1332 [2023-12-02 14:43:10,157 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 14 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:43:10,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 405 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 508 Invalid, 0 Unknown, 104 Unchecked, 0.3s Time] [2023-12-02 14:43:10,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-12-02 14:43:10,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2023-12-02 14:43:10,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 59 states have (on average 1.7627118644067796) internal successors, (104), 90 states have internal predecessors, (104), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 14:43:10,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 124 transitions. [2023-12-02 14:43:10,162 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 124 transitions. Word has length 19 [2023-12-02 14:43:10,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:43:10,162 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 124 transitions. [2023-12-02 14:43:10,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 14:43:10,162 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 124 transitions. [2023-12-02 14:43:10,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 14:43:10,163 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:43:10,163 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:43:10,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-02 14:43:10,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-02 14:43:10,364 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:43:10,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:43:10,364 INFO L85 PathProgramCache]: Analyzing trace with hash 755943574, now seen corresponding path program 1 times [2023-12-02 14:43:10,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:43:10,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069443358] [2023-12-02 14:43:10,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:10,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:43:10,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:10,430 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 14:43:10,430 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:43:10,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069443358] [2023-12-02 14:43:10,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069443358] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:43:10,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:43:10,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 14:43:10,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747710345] [2023-12-02 14:43:10,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:43:10,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 14:43:10,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:43:10,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 14:43:10,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 14:43:10,432 INFO L87 Difference]: Start difference. First operand 103 states and 124 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:43:10,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:43:10,560 INFO L93 Difference]: Finished difference Result 128 states and 154 transitions. [2023-12-02 14:43:10,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 14:43:10,561 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2023-12-02 14:43:10,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:43:10,562 INFO L225 Difference]: With dead ends: 128 [2023-12-02 14:43:10,562 INFO L226 Difference]: Without dead ends: 128 [2023-12-02 14:43:10,562 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 14:43:10,563 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 43 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:43:10,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 184 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:43:10,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-12-02 14:43:10,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 117. [2023-12-02 14:43:10,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 72 states have (on average 1.7638888888888888) internal successors, (127), 102 states have internal predecessors, (127), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 14:43:10,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 151 transitions. [2023-12-02 14:43:10,571 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 151 transitions. Word has length 20 [2023-12-02 14:43:10,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:43:10,572 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 151 transitions. [2023-12-02 14:43:10,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:43:10,572 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 151 transitions. [2023-12-02 14:43:10,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 14:43:10,573 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:43:10,573 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:43:10,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 14:43:10,573 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:43:10,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:43:10,574 INFO L85 PathProgramCache]: Analyzing trace with hash 755943575, now seen corresponding path program 1 times [2023-12-02 14:43:10,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:43:10,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627229658] [2023-12-02 14:43:10,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:10,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:43:10,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:10,713 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 14:43:10,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:43:10,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627229658] [2023-12-02 14:43:10,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627229658] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:43:10,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:43:10,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 14:43:10,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611413389] [2023-12-02 14:43:10,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:43:10,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 14:43:10,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:43:10,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 14:43:10,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 14:43:10,715 INFO L87 Difference]: Start difference. First operand 117 states and 151 transitions. Second operand has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:43:10,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:43:10,921 INFO L93 Difference]: Finished difference Result 133 states and 161 transitions. [2023-12-02 14:43:10,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 14:43:10,921 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2023-12-02 14:43:10,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:43:10,923 INFO L225 Difference]: With dead ends: 133 [2023-12-02 14:43:10,923 INFO L226 Difference]: Without dead ends: 133 [2023-12-02 14:43:10,923 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 14:43:10,924 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 36 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 14:43:10,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 376 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 14:43:10,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-12-02 14:43:10,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 123. [2023-12-02 14:43:10,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 78 states have (on average 1.7564102564102564) internal successors, (137), 108 states have internal predecessors, (137), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 14:43:10,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 161 transitions. [2023-12-02 14:43:10,932 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 161 transitions. Word has length 20 [2023-12-02 14:43:10,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:43:10,932 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 161 transitions. [2023-12-02 14:43:10,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:43:10,932 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 161 transitions. [2023-12-02 14:43:10,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-02 14:43:10,933 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:43:10,933 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:43:10,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 14:43:10,934 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:43:10,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:43:10,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1959536390, now seen corresponding path program 1 times [2023-12-02 14:43:10,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:43:10,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680480445] [2023-12-02 14:43:10,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:10,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:43:10,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:11,012 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 14:43:11,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:43:11,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680480445] [2023-12-02 14:43:11,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680480445] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:43:11,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:43:11,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 14:43:11,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472407140] [2023-12-02 14:43:11,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:43:11,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 14:43:11,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:43:11,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 14:43:11,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 14:43:11,014 INFO L87 Difference]: Start difference. First operand 123 states and 161 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:43:11,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:43:11,109 INFO L93 Difference]: Finished difference Result 133 states and 170 transitions. [2023-12-02 14:43:11,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 14:43:11,109 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2023-12-02 14:43:11,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:43:11,110 INFO L225 Difference]: With dead ends: 133 [2023-12-02 14:43:11,111 INFO L226 Difference]: Without dead ends: 133 [2023-12-02 14:43:11,111 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 14:43:11,111 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 38 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:43:11,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 366 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:43:11,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-12-02 14:43:11,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 124. [2023-12-02 14:43:11,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 79 states have (on average 1.7215189873417722) internal successors, (136), 109 states have internal predecessors, (136), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 14:43:11,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 160 transitions. [2023-12-02 14:43:11,118 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 160 transitions. Word has length 21 [2023-12-02 14:43:11,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:43:11,118 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 160 transitions. [2023-12-02 14:43:11,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:43:11,119 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 160 transitions. [2023-12-02 14:43:11,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 14:43:11,119 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:43:11,119 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:43:11,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 14:43:11,120 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:43:11,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:43:11,120 INFO L85 PathProgramCache]: Analyzing trace with hash 612415883, now seen corresponding path program 1 times [2023-12-02 14:43:11,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:43:11,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913992889] [2023-12-02 14:43:11,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:11,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:43:11,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:11,459 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 14:43:11,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:43:11,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913992889] [2023-12-02 14:43:11,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913992889] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:43:11,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:43:11,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-02 14:43:11,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402680350] [2023-12-02 14:43:11,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:43:11,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 14:43:11,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:43:11,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 14:43:11,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-12-02 14:43:11,461 INFO L87 Difference]: Start difference. First operand 124 states and 160 transitions. Second operand has 12 states, 8 states have (on average 2.25) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:43:11,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:43:11,724 INFO L93 Difference]: Finished difference Result 144 states and 174 transitions. [2023-12-02 14:43:11,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 14:43:11,725 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 2.25) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-12-02 14:43:11,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:43:11,726 INFO L225 Difference]: With dead ends: 144 [2023-12-02 14:43:11,726 INFO L226 Difference]: Without dead ends: 144 [2023-12-02 14:43:11,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-12-02 14:43:11,727 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 54 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 14:43:11,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 446 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 14:43:11,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-12-02 14:43:11,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 129. [2023-12-02 14:43:11,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 84 states have (on average 1.7023809523809523) internal successors, (143), 114 states have internal predecessors, (143), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 14:43:11,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 167 transitions. [2023-12-02 14:43:11,734 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 167 transitions. Word has length 22 [2023-12-02 14:43:11,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:43:11,734 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 167 transitions. [2023-12-02 14:43:11,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 2.25) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:43:11,735 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 167 transitions. [2023-12-02 14:43:11,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 14:43:11,735 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:43:11,735 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:43:11,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-02 14:43:11,736 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:43:11,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:43:11,736 INFO L85 PathProgramCache]: Analyzing trace with hash 612415884, now seen corresponding path program 1 times [2023-12-02 14:43:11,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:43:11,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130638945] [2023-12-02 14:43:11,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:11,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:43:11,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:12,220 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 14:43:12,220 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:43:12,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130638945] [2023-12-02 14:43:12,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130638945] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:43:12,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:43:12,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-12-02 14:43:12,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673555152] [2023-12-02 14:43:12,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:43:12,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 14:43:12,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:43:12,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 14:43:12,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2023-12-02 14:43:12,222 INFO L87 Difference]: Start difference. First operand 129 states and 167 transitions. Second operand has 13 states, 9 states have (on average 2.0) internal successors, (18), 11 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:43:12,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:43:12,578 INFO L93 Difference]: Finished difference Result 143 states and 173 transitions. [2023-12-02 14:43:12,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 14:43:12,579 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 2.0) internal successors, (18), 11 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-12-02 14:43:12,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:43:12,580 INFO L225 Difference]: With dead ends: 143 [2023-12-02 14:43:12,580 INFO L226 Difference]: Without dead ends: 143 [2023-12-02 14:43:12,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2023-12-02 14:43:12,581 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 53 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:43:12,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 527 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 14:43:12,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-12-02 14:43:12,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 129. [2023-12-02 14:43:12,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 84 states have (on average 1.6904761904761905) internal successors, (142), 114 states have internal predecessors, (142), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 14:43:12,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 166 transitions. [2023-12-02 14:43:12,588 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 166 transitions. Word has length 22 [2023-12-02 14:43:12,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:43:12,588 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 166 transitions. [2023-12-02 14:43:12,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 2.0) internal successors, (18), 11 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:43:12,588 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 166 transitions. [2023-12-02 14:43:12,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 14:43:12,589 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:43:12,589 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] [2023-12-02 14:43:12,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-02 14:43:12,590 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:43:12,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:43:12,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1358917054, now seen corresponding path program 1 times [2023-12-02 14:43:12,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:43:12,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620744601] [2023-12-02 14:43:12,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:12,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:43:12,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:12,987 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 14:43:12,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:43:12,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620744601] [2023-12-02 14:43:12,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620744601] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:43:12,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678603774] [2023-12-02 14:43:12,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:12,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:43:12,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:43:12,989 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:43:12,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 14:43:13,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:13,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 47 conjunts are in the unsatisfiable core [2023-12-02 14:43:13,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:43:13,081 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 14:43:13,246 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-12-02 14:43:13,247 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 17 treesize of output 21 [2023-12-02 14:43:13,255 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 16 treesize of output 11 [2023-12-02 14:43:13,360 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 14:43:13,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:43:13,380 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 16 treesize of output 11 [2023-12-02 14:43:13,393 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-12-02 14:43:13,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-12-02 14:43:13,431 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-12-02 14:43:13,431 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:43:13,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678603774] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:43:13,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1847989993] [2023-12-02 14:43:13,552 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-12-02 14:43:13,552 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:43:13,552 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:43:13,552 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:43:13,552 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:43:14,389 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 152 for LOIs [2023-12-02 14:43:14,545 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 19 for LOIs [2023-12-02 14:43:14,554 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:43:18,367 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3321#(and (<= 1 |#StackHeapBarrier|) (<= (select |#length| |ULTIMATE.start_create_~now~0#1.base|) 15) (= |ULTIMATE.start_create_~nested~0#1.offset| 0) (= |ULTIMATE.start_create_~now~0#1.offset| 0) (= |ULTIMATE.start_create_~sll~0#1.offset| 0))' at error location [2023-12-02 14:43:18,368 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:43:18,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 14:43:18,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2023-12-02 14:43:18,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946722993] [2023-12-02 14:43:18,368 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 14:43:18,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-02 14:43:18,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:43:18,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-02 14:43:18,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1477, Unknown=1, NotChecked=78, Total=1722 [2023-12-02 14:43:18,370 INFO L87 Difference]: Start difference. First operand 129 states and 166 transitions. Second operand has 23 states, 16 states have (on average 2.0625) internal successors, (33), 19 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-02 14:43:19,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:43:19,157 INFO L93 Difference]: Finished difference Result 133 states and 162 transitions. [2023-12-02 14:43:19,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 14:43:19,157 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 16 states have (on average 2.0625) internal successors, (33), 19 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 23 [2023-12-02 14:43:19,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:43:19,158 INFO L225 Difference]: With dead ends: 133 [2023-12-02 14:43:19,158 INFO L226 Difference]: Without dead ends: 133 [2023-12-02 14:43:19,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=216, Invalid=1857, Unknown=1, NotChecked=88, Total=2162 [2023-12-02 14:43:19,159 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 75 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 14:43:19,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 411 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 810 Invalid, 0 Unknown, 113 Unchecked, 0.5s Time] [2023-12-02 14:43:19,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-12-02 14:43:19,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 119. [2023-12-02 14:43:19,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 77 states have (on average 1.6623376623376624) internal successors, (128), 106 states have internal predecessors, (128), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 14:43:19,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 148 transitions. [2023-12-02 14:43:19,165 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 148 transitions. Word has length 23 [2023-12-02 14:43:19,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:43:19,165 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 148 transitions. [2023-12-02 14:43:19,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 16 states have (on average 2.0625) internal successors, (33), 19 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-02 14:43:19,166 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 148 transitions. [2023-12-02 14:43:19,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 14:43:19,167 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:43:19,167 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:43:19,172 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 14:43:19,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 14:43:19,372 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:43:19,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:43:19,373 INFO L85 PathProgramCache]: Analyzing trace with hash 121236201, now seen corresponding path program 1 times [2023-12-02 14:43:19,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:43:19,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924122946] [2023-12-02 14:43:19,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:19,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:43:19,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:19,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:43:19,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:43:19,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924122946] [2023-12-02 14:43:19,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924122946] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:43:19,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471105180] [2023-12-02 14:43:19,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:19,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:43:19,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:43:19,898 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:43:19,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 14:43:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:19,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 68 conjunts are in the unsatisfiable core [2023-12-02 14:43:19,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:43:19,983 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 14:43:20,097 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 14:43:20,102 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 14:43:20,132 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 14:43:20,132 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 14:43:20,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2023-12-02 14:43:20,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2023-12-02 14:43:20,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:43:20,469 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:43:20,834 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:43:20,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 2736 treesize of output 2546 [2023-12-02 14:43:21,397 INFO L349 Elim1Store]: treesize reduction 166, result has 57.3 percent of original size [2023-12-02 14:43:21,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 36 case distinctions, treesize of input 2489 treesize of output 2441 [2023-12-02 14:43:26,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471105180] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:43:26,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1877014665] [2023-12-02 14:43:26,467 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 14:43:26,467 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:43:26,467 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:43:26,467 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:43:26,467 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:43:26,697 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 52 for LOIs [2023-12-02 14:43:26,711 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 19 for LOIs [2023-12-02 14:43:26,721 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:43:29,198 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3743#(and (or (not (= |ULTIMATE.start_loop_~nested_list~0#1.offset| 0)) (not (= |ULTIMATE.start_loop_~nested_list~0#1.base| 0))) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~l~0#1.offset| 0) (= |ULTIMATE.start_create_#res#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_loop_~nested_list~0#1.base|) 1)) (= |ULTIMATE.start_loop_~l#1.offset| 0) (= |ULTIMATE.start_loop_#in~l#1.offset| 0))' at error location [2023-12-02 14:43:29,198 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:43:29,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 14:43:29,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 25 [2023-12-02 14:43:29,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739473815] [2023-12-02 14:43:29,199 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 14:43:29,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-02 14:43:29,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:43:29,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-02 14:43:29,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=2275, Unknown=2, NotChecked=0, Total=2450 [2023-12-02 14:43:29,201 INFO L87 Difference]: Start difference. First operand 119 states and 148 transitions. Second operand has 25 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 14:43:29,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:43:29,984 INFO L93 Difference]: Finished difference Result 123 states and 153 transitions. [2023-12-02 14:43:29,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-02 14:43:29,984 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 24 [2023-12-02 14:43:29,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:43:29,985 INFO L225 Difference]: With dead ends: 123 [2023-12-02 14:43:29,985 INFO L226 Difference]: Without dead ends: 123 [2023-12-02 14:43:29,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=233, Invalid=2957, Unknown=2, NotChecked=0, Total=3192 [2023-12-02 14:43:29,987 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 31 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 14:43:29,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 979 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 14:43:29,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-12-02 14:43:29,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 120. [2023-12-02 14:43:29,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 78 states have (on average 1.6538461538461537) internal successors, (129), 107 states have internal predecessors, (129), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 14:43:29,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 149 transitions. [2023-12-02 14:43:29,991 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 149 transitions. Word has length 24 [2023-12-02 14:43:29,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:43:29,991 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 149 transitions. [2023-12-02 14:43:29,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 14:43:29,991 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 149 transitions. [2023-12-02 14:43:29,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 14:43:29,992 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:43:29,993 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:43:29,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 14:43:30,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 14:43:30,199 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:43:30,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:43:30,200 INFO L85 PathProgramCache]: Analyzing trace with hash 124574299, now seen corresponding path program 1 times [2023-12-02 14:43:30,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:43:30,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978159880] [2023-12-02 14:43:30,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:30,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:43:30,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:30,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:43:30,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:43:30,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978159880] [2023-12-02 14:43:30,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978159880] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:43:30,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358624121] [2023-12-02 14:43:30,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:30,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:43:30,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:43:30,683 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:43:30,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 14:43:30,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:30,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 39 conjunts are in the unsatisfiable core [2023-12-02 14:43:30,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:43:30,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-12-02 14:43:30,947 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 20 treesize of output 8 [2023-12-02 14:43:30,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:43:30,970 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:43:30,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358624121] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:43:30,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:43:30,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [14] total 22 [2023-12-02 14:43:30,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925312248] [2023-12-02 14:43:30,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:43:30,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 14:43:30,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:43:30,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 14:43:30,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2023-12-02 14:43:30,972 INFO L87 Difference]: Start difference. First operand 120 states and 149 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:43:31,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:43:31,181 INFO L93 Difference]: Finished difference Result 131 states and 152 transitions. [2023-12-02 14:43:31,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 14:43:31,181 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2023-12-02 14:43:31,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:43:31,183 INFO L225 Difference]: With dead ends: 131 [2023-12-02 14:43:31,183 INFO L226 Difference]: Without dead ends: 131 [2023-12-02 14:43:31,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2023-12-02 14:43:31,184 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 50 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:43:31,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 446 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:43:31,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-12-02 14:43:31,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 121. [2023-12-02 14:43:31,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 79 states have (on average 1.6329113924050633) internal successors, (129), 108 states have internal predecessors, (129), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 14:43:31,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 149 transitions. [2023-12-02 14:43:31,189 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 149 transitions. Word has length 24 [2023-12-02 14:43:31,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:43:31,190 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 149 transitions. [2023-12-02 14:43:31,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:43:31,190 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 149 transitions. [2023-12-02 14:43:31,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 14:43:31,191 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:43:31,191 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:43:31,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 14:43:31,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:43:31,397 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:43:31,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:43:31,397 INFO L85 PathProgramCache]: Analyzing trace with hash -799220620, now seen corresponding path program 1 times [2023-12-02 14:43:31,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:43:31,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806410187] [2023-12-02 14:43:31,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:31,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:43:31,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:31,616 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 14:43:31,616 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:43:31,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806410187] [2023-12-02 14:43:31,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806410187] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:43:31,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197030670] [2023-12-02 14:43:31,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:31,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:43:31,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:43:31,618 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:43:31,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 14:43:31,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:31,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 14:43:31,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:43:31,737 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 14:43:31,757 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 14:43:31,761 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 14:43:31,776 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 14:43:31,796 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-12-02 14:43:31,797 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 14:43:31,799 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 14:43:31,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:43:31,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197030670] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:43:31,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1163081536] [2023-12-02 14:43:31,842 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-12-02 14:43:31,842 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:43:31,843 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:43:31,843 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:43:31,843 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:43:32,579 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 150 for LOIs [2023-12-02 14:43:32,699 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 19 for LOIs [2023-12-02 14:43:32,709 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:43:38,199 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4464#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_create_~nested~0#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_create_~nested_now~0#1.base|) 1)) (= |ULTIMATE.start_create_~nested_now~0#1.offset| 0) (= |ULTIMATE.start_create_~now~0#1.offset| 0) (= |ULTIMATE.start_create_~sll~0#1.offset| 0) (= |ULTIMATE.start_create_#t~ret8#1.offset| 0))' at error location [2023-12-02 14:43:38,199 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:43:38,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 14:43:38,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2023-12-02 14:43:38,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359141327] [2023-12-02 14:43:38,200 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 14:43:38,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 14:43:38,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:43:38,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 14:43:38,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=628, Unknown=2, NotChecked=50, Total=756 [2023-12-02 14:43:38,201 INFO L87 Difference]: Start difference. First operand 121 states and 149 transitions. Second operand has 11 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 14:43:38,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:43:38,579 INFO L93 Difference]: Finished difference Result 124 states and 154 transitions. [2023-12-02 14:43:38,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 14:43:38,579 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 27 [2023-12-02 14:43:38,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:43:38,580 INFO L225 Difference]: With dead ends: 124 [2023-12-02 14:43:38,580 INFO L226 Difference]: Without dead ends: 124 [2023-12-02 14:43:38,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=101, Invalid=831, Unknown=2, NotChecked=58, Total=992 [2023-12-02 14:43:38,581 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 15 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 14:43:38,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 424 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 469 Invalid, 0 Unknown, 104 Unchecked, 0.2s Time] [2023-12-02 14:43:38,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-12-02 14:43:38,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2023-12-02 14:43:38,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 79 states have (on average 1.620253164556962) internal successors, (128), 107 states have internal predecessors, (128), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 14:43:38,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 148 transitions. [2023-12-02 14:43:38,587 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 148 transitions. Word has length 27 [2023-12-02 14:43:38,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:43:38,587 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 148 transitions. [2023-12-02 14:43:38,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 14:43:38,587 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 148 transitions. [2023-12-02 14:43:38,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 14:43:38,588 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:43:38,588 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:43:38,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 14:43:38,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 14:43:38,789 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:43:38,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:43:38,789 INFO L85 PathProgramCache]: Analyzing trace with hash -799220619, now seen corresponding path program 1 times [2023-12-02 14:43:38,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:43:38,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414108277] [2023-12-02 14:43:38,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:38,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:43:38,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:39,121 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 14:43:39,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:43:39,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414108277] [2023-12-02 14:43:39,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414108277] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:43:39,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285227635] [2023-12-02 14:43:39,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:39,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:43:39,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:43:39,123 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:43:39,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 14:43:39,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:39,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 14:43:39,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:43:39,255 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 14:43:39,318 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 14:43:39,321 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 14:43:39,353 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 32 treesize of output 20 [2023-12-02 14:43:39,358 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 14:43:39,404 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 14:43:39,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:43:39,415 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 16 treesize of output 11 [2023-12-02 14:43:39,424 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 14:43:39,425 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 14:43:39,444 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 14:43:39,444 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:43:39,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285227635] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:43:39,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1376886872] [2023-12-02 14:43:39,526 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-12-02 14:43:39,526 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:43:39,527 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:43:39,527 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:43:39,527 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:43:40,344 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 152 for LOIs [2023-12-02 14:43:40,474 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 19 for LOIs [2023-12-02 14:43:40,483 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:43:45,247 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4835#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_create_~nested~0#1.offset| 0) (<= (select |#length| |ULTIMATE.start_create_~nested_now~0#1.base|) 7) (= |ULTIMATE.start_create_~nested_now~0#1.offset| 0) (= |ULTIMATE.start_create_~now~0#1.offset| 0) (= |ULTIMATE.start_create_~sll~0#1.offset| 0) (= |ULTIMATE.start_create_#t~ret8#1.offset| 0))' at error location [2023-12-02 14:43:45,248 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:43:45,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 14:43:45,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2023-12-02 14:43:45,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695160235] [2023-12-02 14:43:45,248 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 14:43:45,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 14:43:45,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:43:45,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 14:43:45,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1023, Unknown=2, NotChecked=64, Total=1190 [2023-12-02 14:43:45,250 INFO L87 Difference]: Start difference. First operand 120 states and 148 transitions. Second operand has 18 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-02 14:43:45,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:43:45,844 INFO L93 Difference]: Finished difference Result 121 states and 150 transitions. [2023-12-02 14:43:45,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 14:43:45,844 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 27 [2023-12-02 14:43:45,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:43:45,845 INFO L225 Difference]: With dead ends: 121 [2023-12-02 14:43:45,845 INFO L226 Difference]: Without dead ends: 121 [2023-12-02 14:43:45,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=142, Invalid=1342, Unknown=2, NotChecked=74, Total=1560 [2023-12-02 14:43:45,847 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 12 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 14:43:45,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 498 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 707 Invalid, 0 Unknown, 102 Unchecked, 0.4s Time] [2023-12-02 14:43:45,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-12-02 14:43:45,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 114. [2023-12-02 14:43:45,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 77 states have (on average 1.5844155844155845) internal successors, (122), 102 states have internal predecessors, (122), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 14:43:45,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 140 transitions. [2023-12-02 14:43:45,852 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 140 transitions. Word has length 27 [2023-12-02 14:43:45,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:43:45,852 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 140 transitions. [2023-12-02 14:43:45,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-02 14:43:45,852 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 140 transitions. [2023-12-02 14:43:45,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 14:43:45,853 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:43:45,853 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:43:45,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 14:43:46,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 14:43:46,054 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:43:46,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:43:46,054 INFO L85 PathProgramCache]: Analyzing trace with hash 547302457, now seen corresponding path program 1 times [2023-12-02 14:43:46,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:43:46,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244619202] [2023-12-02 14:43:46,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:46,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:43:46,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:46,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 14:43:46,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:43:46,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244619202] [2023-12-02 14:43:46,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244619202] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:43:46,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337132876] [2023-12-02 14:43:46,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:46,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:43:46,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:43:46,656 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:43:46,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 14:43:46,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:46,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 74 conjunts are in the unsatisfiable core [2023-12-02 14:43:46,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:43:46,767 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 14:43:46,788 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 14:43:46,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 14:43:46,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-02 14:43:46,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-02 14:43:47,054 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 14:43:47,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 23 treesize of output 20 [2023-12-02 14:43:47,069 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 14:43:47,070 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 14:43:47,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 14:43:47,229 INFO L349 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2023-12-02 14:43:47,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 2 case distinctions, treesize of input 34 treesize of output 31 [2023-12-02 14:43:47,253 INFO L349 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2023-12-02 14:43:47,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 17 [2023-12-02 14:43:47,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 14:43:47,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:43:47,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337132876] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:43:47,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1463891078] [2023-12-02 14:43:47,886 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-12-02 14:43:47,886 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:43:47,886 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:43:47,886 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:43:47,887 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:43:48,191 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 54 for LOIs [2023-12-02 14:43:48,203 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 19 for LOIs [2023-12-02 14:43:48,211 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:43:51,188 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5249#(and (not (= (select |#valid| |ULTIMATE.start_loop_~l#1.base|) 1)) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~l~0#1.offset| 0) (= |ULTIMATE.start_create_#res#1.offset| 0) (= |ULTIMATE.start_loop_#in~l#1.offset| 0))' at error location [2023-12-02 14:43:51,188 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:43:51,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 14:43:51,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2023-12-02 14:43:51,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724516898] [2023-12-02 14:43:51,189 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 14:43:51,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-02 14:43:51,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:43:51,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-02 14:43:51,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=2380, Unknown=2, NotChecked=0, Total=2550 [2023-12-02 14:43:51,191 INFO L87 Difference]: Start difference. First operand 114 states and 140 transitions. Second operand has 26 states, 20 states have (on average 2.05) internal successors, (41), 21 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 14:43:52,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:43:52,191 INFO L93 Difference]: Finished difference Result 119 states and 147 transitions. [2023-12-02 14:43:52,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 14:43:52,191 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 20 states have (on average 2.05) internal successors, (41), 21 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2023-12-02 14:43:52,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:43:52,192 INFO L225 Difference]: With dead ends: 119 [2023-12-02 14:43:52,193 INFO L226 Difference]: Without dead ends: 119 [2023-12-02 14:43:52,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=241, Invalid=3417, Unknown=2, NotChecked=0, Total=3660 [2023-12-02 14:43:52,195 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 15 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 14:43:52,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 879 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 14:43:52,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-12-02 14:43:52,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2023-12-02 14:43:52,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 79 states have (on average 1.5696202531645569) internal successors, (124), 104 states have internal predecessors, (124), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 14:43:52,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 142 transitions. [2023-12-02 14:43:52,199 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 142 transitions. Word has length 26 [2023-12-02 14:43:52,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:43:52,199 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 142 transitions. [2023-12-02 14:43:52,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 20 states have (on average 2.05) internal successors, (41), 21 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 14:43:52,199 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 142 transitions. [2023-12-02 14:43:52,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 14:43:52,200 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:43:52,200 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:43:52,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-02 14:43:52,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:43:52,401 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:43:52,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:43:52,401 INFO L85 PathProgramCache]: Analyzing trace with hash -213370941, now seen corresponding path program 1 times [2023-12-02 14:43:52,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:43:52,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889480096] [2023-12-02 14:43:52,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:52,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:43:52,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:52,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:43:52,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:43:52,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889480096] [2023-12-02 14:43:52,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889480096] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:43:52,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:43:52,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 14:43:52,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975291966] [2023-12-02 14:43:52,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:43:52,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 14:43:52,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:43:52,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 14:43:52,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 14:43:52,475 INFO L87 Difference]: Start difference. First operand 116 states and 142 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:43:52,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:43:52,615 INFO L93 Difference]: Finished difference Result 138 states and 166 transitions. [2023-12-02 14:43:52,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 14:43:52,616 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-12-02 14:43:52,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:43:52,617 INFO L225 Difference]: With dead ends: 138 [2023-12-02 14:43:52,617 INFO L226 Difference]: Without dead ends: 138 [2023-12-02 14:43:52,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 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 14:43:52,618 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 102 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:43:52,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 331 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:43:52,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-12-02 14:43:52,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 117. [2023-12-02 14:43:52,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 80 states have (on average 1.5625) internal successors, (125), 105 states have internal predecessors, (125), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 14:43:52,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 143 transitions. [2023-12-02 14:43:52,623 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 143 transitions. Word has length 27 [2023-12-02 14:43:52,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:43:52,624 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 143 transitions. [2023-12-02 14:43:52,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:43:52,624 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 143 transitions. [2023-12-02 14:43:52,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 14:43:52,625 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:43:52,625 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:43:52,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-12-02 14:43:52,625 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:43:52,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:43:52,626 INFO L85 PathProgramCache]: Analyzing trace with hash -213373585, now seen corresponding path program 1 times [2023-12-02 14:43:52,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:43:52,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912641800] [2023-12-02 14:43:52,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:52,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:43:52,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:52,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:43:52,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:43:52,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912641800] [2023-12-02 14:43:52,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912641800] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:43:52,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:43:52,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 14:43:52,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459317662] [2023-12-02 14:43:52,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:43:52,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:43:52,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:43:52,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:43:52,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:43:52,699 INFO L87 Difference]: Start difference. First operand 117 states and 143 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:43:52,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:43:52,860 INFO L93 Difference]: Finished difference Result 166 states and 193 transitions. [2023-12-02 14:43:52,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 14:43:52,861 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-12-02 14:43:52,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:43:52,862 INFO L225 Difference]: With dead ends: 166 [2023-12-02 14:43:52,862 INFO L226 Difference]: Without dead ends: 166 [2023-12-02 14:43:52,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-02 14:43:52,863 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 85 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:43:52,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 215 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:43:52,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2023-12-02 14:43:52,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 127. [2023-12-02 14:43:52,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 91 states have (on average 1.6043956043956045) internal successors, (146), 115 states have internal predecessors, (146), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 14:43:52,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 164 transitions. [2023-12-02 14:43:52,867 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 164 transitions. Word has length 27 [2023-12-02 14:43:52,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:43:52,867 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 164 transitions. [2023-12-02 14:43:52,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:43:52,868 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 164 transitions. [2023-12-02 14:43:52,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 14:43:52,868 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:43:52,869 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:43:52,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-12-02 14:43:52,869 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:43:52,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:43:52,869 INFO L85 PathProgramCache]: Analyzing trace with hash -213373584, now seen corresponding path program 1 times [2023-12-02 14:43:52,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:43:52,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464360235] [2023-12-02 14:43:52,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:52,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:43:52,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:53,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 14:43:53,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:43:53,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464360235] [2023-12-02 14:43:53,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464360235] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:43:53,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162029781] [2023-12-02 14:43:53,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:53,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:43:53,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:43:53,071 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:43:53,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 14:43:53,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:53,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-02 14:43:53,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:43:53,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:43:53,309 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:43:53,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162029781] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:43:53,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:43:53,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2023-12-02 14:43:53,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268200189] [2023-12-02 14:43:53,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:43:53,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 14:43:53,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:43:53,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 14:43:53,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-12-02 14:43:53,311 INFO L87 Difference]: Start difference. First operand 127 states and 164 transitions. Second operand has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:43:53,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:43:53,556 INFO L93 Difference]: Finished difference Result 186 states and 221 transitions. [2023-12-02 14:43:53,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 14:43:53,556 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-12-02 14:43:53,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:43:53,558 INFO L225 Difference]: With dead ends: 186 [2023-12-02 14:43:53,558 INFO L226 Difference]: Without dead ends: 186 [2023-12-02 14:43:53,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-12-02 14:43:53,559 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 96 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 14:43:53,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 339 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 14:43:53,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2023-12-02 14:43:53,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 136. [2023-12-02 14:43:53,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 100 states have (on average 1.62) internal successors, (162), 124 states have internal predecessors, (162), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 14:43:53,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 180 transitions. [2023-12-02 14:43:53,564 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 180 transitions. Word has length 27 [2023-12-02 14:43:53,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:43:53,564 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 180 transitions. [2023-12-02 14:43:53,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:43:53,564 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 180 transitions. [2023-12-02 14:43:53,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 14:43:53,565 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:43:53,565 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:43:53,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 14:43:53,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-12-02 14:43:53,765 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:43:53,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:43:53,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1975355683, now seen corresponding path program 1 times [2023-12-02 14:43:53,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:43:53,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322479114] [2023-12-02 14:43:53,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:53,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:43:53,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:53,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 14:43:53,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:43:53,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322479114] [2023-12-02 14:43:53,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322479114] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:43:53,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887523565] [2023-12-02 14:43:53,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:53,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:43:53,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:43:53,930 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:43:53,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 14:43:54,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:54,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 14:43:54,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:43:54,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:43:54,114 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:43:54,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887523565] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:43:54,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:43:54,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 14 [2023-12-02 14:43:54,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754359744] [2023-12-02 14:43:54,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:43:54,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 14:43:54,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:43:54,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 14:43:54,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-12-02 14:43:54,116 INFO L87 Difference]: Start difference. First operand 136 states and 180 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:43:54,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:43:54,309 INFO L93 Difference]: Finished difference Result 194 states and 242 transitions. [2023-12-02 14:43:54,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 14:43:54,310 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2023-12-02 14:43:54,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:43:54,311 INFO L225 Difference]: With dead ends: 194 [2023-12-02 14:43:54,311 INFO L226 Difference]: Without dead ends: 194 [2023-12-02 14:43:54,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2023-12-02 14:43:54,312 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 110 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 14:43:54,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 232 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 14:43:54,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2023-12-02 14:43:54,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 144. [2023-12-02 14:43:54,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 108 states have (on average 1.6388888888888888) internal successors, (177), 132 states have internal predecessors, (177), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 14:43:54,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 195 transitions. [2023-12-02 14:43:54,317 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 195 transitions. Word has length 28 [2023-12-02 14:43:54,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:43:54,318 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 195 transitions. [2023-12-02 14:43:54,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:43:54,318 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 195 transitions. [2023-12-02 14:43:54,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 14:43:54,319 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:43:54,319 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, 1, 1, 1] [2023-12-02 14:43:54,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-02 14:43:54,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-12-02 14:43:54,525 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:43:54,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:43:54,525 INFO L85 PathProgramCache]: Analyzing trace with hash 906147695, now seen corresponding path program 1 times [2023-12-02 14:43:54,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:43:54,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857144954] [2023-12-02 14:43:54,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:54,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:43:54,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:54,802 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 14:43:54,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:43:54,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857144954] [2023-12-02 14:43:54,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857144954] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:43:54,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732636847] [2023-12-02 14:43:54,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:43:54,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:43:54,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:43:54,803 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:43:54,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 14:43:54,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:43:54,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-02 14:43:54,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:43:54,987 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 19 treesize of output 1 [2023-12-02 14:43:55,024 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 21 treesize of output 9 [2023-12-02 14:43:55,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 14:43:55,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:43:55,042 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 34 treesize of output 28 [2023-12-02 14:43:55,144 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:43:55,145 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 34 treesize of output 52 [2023-12-02 14:43:55,194 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 14:43:55,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732636847] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:43:55,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1776195030] [2023-12-02 14:43:55,197 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-12-02 14:43:55,197 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:43:55,197 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:43:55,197 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:43:55,197 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:43:55,873 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 150 for LOIs [2023-12-02 14:43:55,984 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 19 for LOIs [2023-12-02 14:43:55,992 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:44:04,413 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7147#(and (or (not (= |ULTIMATE.start_loop_~nested_list~0#1.offset| 0)) (not (= |ULTIMATE.start_loop_~nested_list~0#1.base| 0))) (<= 1 |#StackHeapBarrier|) (not (= |ULTIMATE.start_loop_~l#1.base| 0)) (= |ULTIMATE.start_main_~l~0#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_loop_~l#1.base|) 8) |ULTIMATE.start_loop_~nested_list~0#1.base|) (= |ULTIMATE.start_main_~l~0#1.base| |ULTIMATE.start_loop_#in~l#1.base|) (= (select |#valid| |ULTIMATE.start_loop_~l#1.base|) 1) (= |ULTIMATE.start_loop_~l#1.base| |ULTIMATE.start_loop_#in~l#1.base|) (= |ULTIMATE.start_create_#res#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_loop_~nested_list~0#1.base|) 1)) (exists ((|v_ULTIMATE.start_create_~now~0#1.base_33| Int) (|v_#memory_$Pointer$.offset_216| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_219| (Array Int (Array Int Int)))) (and (<= 16 (select |#length| |v_ULTIMATE.start_create_~now~0#1.base_33|)) (= (store |v_#memory_$Pointer$.base_219| |v_ULTIMATE.start_create_~now~0#1.base_33| (store (select |v_#memory_$Pointer$.base_219| |v_ULTIMATE.start_create_~now~0#1.base_33|) 8 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_~now~0#1.base_33|) 8))) |#memory_$Pointer$.base|) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_216| |v_ULTIMATE.start_create_~now~0#1.base_33| (store (select |v_#memory_$Pointer$.offset_216| |v_ULTIMATE.start_create_~now~0#1.base_33|) 8 0))) (= (select |#valid| |v_ULTIMATE.start_create_~now~0#1.base_33|) 1))) (= |ULTIMATE.start_loop_~l#1.offset| 0) (<= 16 (select |#length| |ULTIMATE.start_loop_~l#1.base|)) (= |ULTIMATE.start_loop_~nested_list~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_loop_~l#1.base|) 8)) (= |ULTIMATE.start_main_~l~0#1.base| |ULTIMATE.start_create_#res#1.base|) (= |ULTIMATE.start_loop_#in~l#1.offset| 0))' at error location [2023-12-02 14:44:04,413 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:44:04,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:44:04,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2023-12-02 14:44:04,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405392185] [2023-12-02 14:44:04,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:44:04,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 14:44:04,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:44:04,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 14:44:04,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1513, Unknown=1, NotChecked=0, Total=1640 [2023-12-02 14:44:04,415 INFO L87 Difference]: Start difference. First operand 144 states and 195 transitions. Second operand has 18 states, 16 states have (on average 2.75) internal successors, (44), 17 states have internal predecessors, (44), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 14:44:04,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:44:04,896 INFO L93 Difference]: Finished difference Result 193 states and 252 transitions. [2023-12-02 14:44:04,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 14:44:04,897 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.75) internal successors, (44), 17 states have internal predecessors, (44), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 30 [2023-12-02 14:44:04,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:44:04,898 INFO L225 Difference]: With dead ends: 193 [2023-12-02 14:44:04,898 INFO L226 Difference]: Without dead ends: 193 [2023-12-02 14:44:04,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=145, Invalid=1746, Unknown=1, NotChecked=0, Total=1892 [2023-12-02 14:44:04,899 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 83 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 14:44:04,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 767 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 14:44:04,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-12-02 14:44:04,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 157. [2023-12-02 14:44:04,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 120 states have (on average 1.6) internal successors, (192), 144 states have internal predecessors, (192), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 14:44:04,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 212 transitions. [2023-12-02 14:44:04,904 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 212 transitions. Word has length 30 [2023-12-02 14:44:04,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:44:04,904 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 212 transitions. [2023-12-02 14:44:04,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.75) internal successors, (44), 17 states have internal predecessors, (44), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 14:44:04,904 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 212 transitions. [2023-12-02 14:44:04,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 14:44:04,905 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:44:04,905 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, 1, 1, 1] [2023-12-02 14:44:04,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 14:44:05,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-12-02 14:44:05,105 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:44:05,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:44:05,106 INFO L85 PathProgramCache]: Analyzing trace with hash 906147696, now seen corresponding path program 1 times [2023-12-02 14:44:05,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:44:05,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425920085] [2023-12-02 14:44:05,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:44:05,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:44:05,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:44:05,648 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 14:44:05,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:44:05,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425920085] [2023-12-02 14:44:05,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425920085] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:44:05,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381104692] [2023-12-02 14:44:05,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:44:05,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:44:05,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:44:05,650 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:44:05,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 14:44:05,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:44:05,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 53 conjunts are in the unsatisfiable core [2023-12-02 14:44:05,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:44:05,910 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 19 treesize of output 1 [2023-12-02 14:44:05,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-02 14:44:05,970 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 21 treesize of output 9 [2023-12-02 14:44:05,976 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 14:44:05,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:44:06,062 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 70 treesize of output 64 [2023-12-02 14:44:06,065 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 94 treesize of output 82 [2023-12-02 14:44:06,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:44:06,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:44:06,127 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:44:06,128 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 23 treesize of output 27 [2023-12-02 14:44:06,191 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 14:44:06,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381104692] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:44:06,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [130032022] [2023-12-02 14:44:06,193 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-12-02 14:44:06,193 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:44:06,193 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:44:06,193 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:44:06,194 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:44:06,871 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 150 for LOIs [2023-12-02 14:44:06,975 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 19 for LOIs [2023-12-02 14:44:06,984 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:44:18,009 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7725#(and (or (not (= |ULTIMATE.start_loop_~nested_list~0#1.offset| 0)) (not (= |ULTIMATE.start_loop_~nested_list~0#1.base| 0))) (<= 1 |#StackHeapBarrier|) (not (= |ULTIMATE.start_loop_~l#1.base| 0)) (= |ULTIMATE.start_main_~l~0#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_loop_~l#1.base|) 8) |ULTIMATE.start_loop_~nested_list~0#1.base|) (= |ULTIMATE.start_main_~l~0#1.base| |ULTIMATE.start_loop_#in~l#1.base|) (= (select |#valid| |ULTIMATE.start_loop_~l#1.base|) 1) (= |ULTIMATE.start_loop_~l#1.base| |ULTIMATE.start_loop_#in~l#1.base|) (= |ULTIMATE.start_create_#res#1.offset| 0) (= |ULTIMATE.start_loop_~l#1.offset| 0) (or (< (select |#length| |ULTIMATE.start_loop_~nested_list~0#1.base|) (+ 8 |ULTIMATE.start_loop_~nested_list~0#1.offset|)) (< |ULTIMATE.start_loop_~nested_list~0#1.offset| 0)) (<= 16 (select |#length| |ULTIMATE.start_loop_~l#1.base|)) (= |ULTIMATE.start_loop_~nested_list~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_loop_~l#1.base|) 8)) (= |ULTIMATE.start_main_~l~0#1.base| |ULTIMATE.start_create_#res#1.base|) (exists ((|v_ULTIMATE.start_create_~now~0#1.base_36| Int) (|v_#memory_$Pointer$.base_247| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_244| (Array Int (Array Int Int)))) (and (= (select |#valid| |v_ULTIMATE.start_create_~now~0#1.base_36|) 1) (<= 16 (select |#length| |v_ULTIMATE.start_create_~now~0#1.base_36|)) (= (store |v_#memory_$Pointer$.base_247| |v_ULTIMATE.start_create_~now~0#1.base_36| (store (select |v_#memory_$Pointer$.base_247| |v_ULTIMATE.start_create_~now~0#1.base_36|) 8 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_~now~0#1.base_36|) 8))) |#memory_$Pointer$.base|) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_244| |v_ULTIMATE.start_create_~now~0#1.base_36| (store (select |v_#memory_$Pointer$.offset_244| |v_ULTIMATE.start_create_~now~0#1.base_36|) 8 0))))) (= |ULTIMATE.start_loop_#in~l#1.offset| 0))' at error location [2023-12-02 14:44:18,009 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:44:18,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:44:18,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 24 [2023-12-02 14:44:18,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367360838] [2023-12-02 14:44:18,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:44:18,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-02 14:44:18,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:44:18,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-02 14:44:18,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2098, Unknown=3, NotChecked=0, Total=2256 [2023-12-02 14:44:18,012 INFO L87 Difference]: Start difference. First operand 157 states and 212 transitions. Second operand has 25 states, 20 states have (on average 2.65) internal successors, (53), 22 states have internal predecessors, (53), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 14:44:18,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:44:18,610 INFO L93 Difference]: Finished difference Result 172 states and 227 transitions. [2023-12-02 14:44:18,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 14:44:18,611 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 2.65) internal successors, (53), 22 states have internal predecessors, (53), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 30 [2023-12-02 14:44:18,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:44:18,612 INFO L225 Difference]: With dead ends: 172 [2023-12-02 14:44:18,612 INFO L226 Difference]: Without dead ends: 172 [2023-12-02 14:44:18,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=182, Invalid=2467, Unknown=3, NotChecked=0, Total=2652 [2023-12-02 14:44:18,613 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 80 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 14:44:18,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 896 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 14:44:18,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-12-02 14:44:18,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 157. [2023-12-02 14:44:18,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 120 states have (on average 1.5916666666666666) internal successors, (191), 144 states have internal predecessors, (191), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 14:44:18,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 211 transitions. [2023-12-02 14:44:18,619 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 211 transitions. Word has length 30 [2023-12-02 14:44:18,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:44:18,619 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 211 transitions. [2023-12-02 14:44:18,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 2.65) internal successors, (53), 22 states have internal predecessors, (53), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 14:44:18,619 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 211 transitions. [2023-12-02 14:44:18,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 14:44:18,619 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:44:18,619 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:44:18,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 14:44:18,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:44:18,820 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:44:18,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:44:18,820 INFO L85 PathProgramCache]: Analyzing trace with hash -58666875, now seen corresponding path program 1 times [2023-12-02 14:44:18,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:44:18,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036702948] [2023-12-02 14:44:18,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:44:18,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:44:18,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:44:19,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:44:19,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:44:19,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036702948] [2023-12-02 14:44:19,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036702948] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:44:19,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723904902] [2023-12-02 14:44:19,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:44:19,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:44:19,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:44:19,625 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:44:19,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 14:44:19,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:44:19,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-02 14:44:19,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:44:19,848 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 8 treesize of output 1 [2023-12-02 14:44:20,013 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 14:44:20,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:44:20,017 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:44:20,141 INFO L349 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2023-12-02 14:44:20,142 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 18 treesize of output 17 [2023-12-02 14:44:20,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:44:20,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723904902] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:44:20,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [364553938] [2023-12-02 14:44:20,253 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 14:44:20,253 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:44:20,253 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:44:20,253 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:44:20,253 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:44:20,550 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 52 for LOIs [2023-12-02 14:44:20,561 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 19 for LOIs [2023-12-02 14:44:20,570 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:44:24,844 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8291#(and (<= 1 |#StackHeapBarrier|) (not (= |ULTIMATE.start_destroy_~l#1.base| 0)) (= |ULTIMATE.start_main_~l~0#1.offset| 0) (= |ULTIMATE.start_create_#res#1.offset| 0) (exists ((|v_ULTIMATE.start_loop_~l#1.base_38| Int) (|v_ULTIMATE.start_loop_~l#1.offset_36| Int)) (and (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_loop_~l#1.base_38|) |v_ULTIMATE.start_loop_~l#1.offset_36|) 0) (<= 0 |v_ULTIMATE.start_loop_~l#1.offset_36|) (<= (+ |v_ULTIMATE.start_loop_~l#1.offset_36| 8) (select |#length| |v_ULTIMATE.start_loop_~l#1.base_38|)) (= (select |#valid| |v_ULTIMATE.start_loop_~l#1.base_38|) 1) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_loop_~l#1.base_38|) |v_ULTIMATE.start_loop_~l#1.offset_36|) 0))) (= |ULTIMATE.start_main_~l~0#1.base| |ULTIMATE.start_destroy_#in~l#1.base|) (= |ULTIMATE.start_destroy_~l#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_destroy_~nested_list~1#1.base|) 1)) (or (not (= |ULTIMATE.start_destroy_~nested_list~1#1.offset| 0)) (not (= |ULTIMATE.start_destroy_~nested_list~1#1.base| 0))) (<= 16 (select |#length| |ULTIMATE.start_destroy_~l#1.base|)) (= |ULTIMATE.start_destroy_~next~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_destroy_~l#1.base|) 0)) (= (select |#valid| |ULTIMATE.start_destroy_~l#1.base|) 1) (= |ULTIMATE.start_destroy_#in~l#1.base| |ULTIMATE.start_destroy_~l#1.base|) (= |ULTIMATE.start_destroy_#in~l#1.offset| 0) (= |ULTIMATE.start_destroy_~nested_list~1#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_destroy_~l#1.base|) 8)) (= |ULTIMATE.start_destroy_~next~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_destroy_~l#1.base|) 0)) (= |ULTIMATE.start_destroy_~nested_list~1#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_destroy_~l#1.base|) 8)))' at error location [2023-12-02 14:44:24,845 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:44:24,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:44:24,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12, 7] total 31 [2023-12-02 14:44:24,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730409283] [2023-12-02 14:44:24,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:44:24,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-02 14:44:24,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:44:24,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-02 14:44:24,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=3109, Unknown=2, NotChecked=0, Total=3306 [2023-12-02 14:44:24,847 INFO L87 Difference]: Start difference. First operand 157 states and 211 transitions. Second operand has 32 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 28 states have internal predecessors, (68), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-02 14:44:26,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:44:26,038 INFO L93 Difference]: Finished difference Result 225 states and 302 transitions. [2023-12-02 14:44:26,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-02 14:44:26,039 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 28 states have internal predecessors, (68), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 30 [2023-12-02 14:44:26,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:44:26,041 INFO L225 Difference]: With dead ends: 225 [2023-12-02 14:44:26,041 INFO L226 Difference]: Without dead ends: 225 [2023-12-02 14:44:26,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=300, Invalid=4390, Unknown=2, NotChecked=0, Total=4692 [2023-12-02 14:44:26,043 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 212 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 1318 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 14:44:26,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 680 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1318 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 14:44:26,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-12-02 14:44:26,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 179. [2023-12-02 14:44:26,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 143 states have (on average 1.6643356643356644) internal successors, (238), 166 states have internal predecessors, (238), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 14:44:26,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 258 transitions. [2023-12-02 14:44:26,049 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 258 transitions. Word has length 30 [2023-12-02 14:44:26,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:44:26,049 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 258 transitions. [2023-12-02 14:44:26,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 28 states have internal predecessors, (68), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-02 14:44:26,050 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 258 transitions. [2023-12-02 14:44:26,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 14:44:26,050 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:44:26,050 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:44:26,056 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 14:44:26,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:44:26,251 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:44:26,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:44:26,251 INFO L85 PathProgramCache]: Analyzing trace with hash -58666874, now seen corresponding path program 1 times [2023-12-02 14:44:26,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:44:26,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600610251] [2023-12-02 14:44:26,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:44:26,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:44:26,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:44:26,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:44:26,622 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:44:26,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600610251] [2023-12-02 14:44:26,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600610251] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:44:26,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:44:26,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-12-02 14:44:26,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630364881] [2023-12-02 14:44:26,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:44:26,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 14:44:26,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:44:26,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 14:44:26,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2023-12-02 14:44:26,624 INFO L87 Difference]: Start difference. First operand 179 states and 258 transitions. Second operand has 14 states, 10 states have (on average 2.6) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:44:27,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:44:27,104 INFO L93 Difference]: Finished difference Result 238 states and 320 transitions. [2023-12-02 14:44:27,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 14:44:27,105 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 2.6) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2023-12-02 14:44:27,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:44:27,107 INFO L225 Difference]: With dead ends: 238 [2023-12-02 14:44:27,107 INFO L226 Difference]: Without dead ends: 238 [2023-12-02 14:44:27,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2023-12-02 14:44:27,108 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 117 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 14:44:27,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 425 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 14:44:27,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2023-12-02 14:44:27,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 185. [2023-12-02 14:44:27,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 149 states have (on average 1.6442953020134228) internal successors, (245), 172 states have internal predecessors, (245), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 14:44:27,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 265 transitions. [2023-12-02 14:44:27,113 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 265 transitions. Word has length 30 [2023-12-02 14:44:27,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:44:27,114 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 265 transitions. [2023-12-02 14:44:27,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 2.6) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:44:27,114 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 265 transitions. [2023-12-02 14:44:27,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 14:44:27,114 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:44:27,115 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1] [2023-12-02 14:44:27,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-12-02 14:44:27,115 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:44:27,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:44:27,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1114051057, now seen corresponding path program 1 times [2023-12-02 14:44:27,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:44:27,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040313204] [2023-12-02 14:44:27,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:44:27,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:44:27,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:44:27,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 14:44:27,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:44:27,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040313204] [2023-12-02 14:44:27,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040313204] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:44:27,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:44:27,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-02 14:44:27,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927623989] [2023-12-02 14:44:27,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:44:27,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 14:44:27,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:44:27,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 14:44:27,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-12-02 14:44:27,388 INFO L87 Difference]: Start difference. First operand 185 states and 265 transitions. Second operand has 12 states, 8 states have (on average 3.0) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 14:44:27,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:44:27,800 INFO L93 Difference]: Finished difference Result 201 states and 288 transitions. [2023-12-02 14:44:27,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 14:44:27,800 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 3.0) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-12-02 14:44:27,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:44:27,801 INFO L225 Difference]: With dead ends: 201 [2023-12-02 14:44:27,802 INFO L226 Difference]: Without dead ends: 201 [2023-12-02 14:44:27,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2023-12-02 14:44:27,802 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 13 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:44:27,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 404 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 14:44:27,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-12-02 14:44:27,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 193. [2023-12-02 14:44:27,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 157 states have (on average 1.643312101910828) internal successors, (258), 180 states have internal predecessors, (258), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 14:44:27,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 278 transitions. [2023-12-02 14:44:27,809 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 278 transitions. Word has length 32 [2023-12-02 14:44:27,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:44:27,809 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 278 transitions. [2023-12-02 14:44:27,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 3.0) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 14:44:27,809 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 278 transitions. [2023-12-02 14:44:27,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 14:44:27,809 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:44:27,809 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1] [2023-12-02 14:44:27,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-12-02 14:44:27,810 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:44:27,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:44:27,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1114051056, now seen corresponding path program 1 times [2023-12-02 14:44:27,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:44:27,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898094213] [2023-12-02 14:44:27,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:44:27,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:44:27,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:44:28,191 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 14:44:28,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:44:28,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898094213] [2023-12-02 14:44:28,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898094213] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:44:28,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:44:28,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-02 14:44:28,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052329294] [2023-12-02 14:44:28,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:44:28,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 14:44:28,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:44:28,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 14:44:28,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-12-02 14:44:28,193 INFO L87 Difference]: Start difference. First operand 193 states and 278 transitions. Second operand has 12 states, 8 states have (on average 3.0) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 14:44:28,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:44:28,613 INFO L93 Difference]: Finished difference Result 196 states and 280 transitions. [2023-12-02 14:44:28,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 14:44:28,614 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 3.0) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-12-02 14:44:28,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:44:28,615 INFO L225 Difference]: With dead ends: 196 [2023-12-02 14:44:28,615 INFO L226 Difference]: Without dead ends: 196 [2023-12-02 14:44:28,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-12-02 14:44:28,616 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 6 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:44:28,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 311 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 14:44:28,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2023-12-02 14:44:28,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 193. [2023-12-02 14:44:28,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 157 states have (on average 1.6305732484076434) internal successors, (256), 180 states have internal predecessors, (256), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 14:44:28,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 276 transitions. [2023-12-02 14:44:28,622 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 276 transitions. Word has length 32 [2023-12-02 14:44:28,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:44:28,622 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 276 transitions. [2023-12-02 14:44:28,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 3.0) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 14:44:28,622 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 276 transitions. [2023-12-02 14:44:28,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 14:44:28,623 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:44:28,623 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:44:28,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-12-02 14:44:28,623 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:44:28,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:44:28,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1818605277, now seen corresponding path program 1 times [2023-12-02 14:44:28,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:44:28,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164095780] [2023-12-02 14:44:28,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:44:28,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:44:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:44:28,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:44:28,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:44:28,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164095780] [2023-12-02 14:44:28,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164095780] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:44:28,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:44:28,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 14:44:28,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101745879] [2023-12-02 14:44:28,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:44:28,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 14:44:28,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:44:28,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 14:44:28,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 14:44:28,723 INFO L87 Difference]: Start difference. First operand 193 states and 276 transitions. Second operand has 8 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:44:28,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:44:28,938 INFO L93 Difference]: Finished difference Result 213 states and 299 transitions. [2023-12-02 14:44:28,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 14:44:28,939 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2023-12-02 14:44:28,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:44:28,940 INFO L225 Difference]: With dead ends: 213 [2023-12-02 14:44:28,940 INFO L226 Difference]: Without dead ends: 213 [2023-12-02 14:44:28,941 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 14:44:28,941 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 83 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 14:44:28,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 261 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 14:44:28,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-12-02 14:44:28,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 205. [2023-12-02 14:44:28,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 169 states have (on average 1.650887573964497) internal successors, (279), 192 states have internal predecessors, (279), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 14:44:28,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 299 transitions. [2023-12-02 14:44:28,948 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 299 transitions. Word has length 31 [2023-12-02 14:44:28,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:44:28,948 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 299 transitions. [2023-12-02 14:44:28,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:44:28,948 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 299 transitions. [2023-12-02 14:44:28,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 14:44:28,949 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:44:28,949 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:44:28,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-12-02 14:44:28,949 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:44:28,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:44:28,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1070334003, now seen corresponding path program 1 times [2023-12-02 14:44:28,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:44:28,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293322031] [2023-12-02 14:44:28,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:44:28,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:44:28,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:44:29,633 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:44:29,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:44:29,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293322031] [2023-12-02 14:44:29,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293322031] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:44:29,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035581487] [2023-12-02 14:44:29,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:44:29,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:44:29,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:44:29,634 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:44:29,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 14:44:29,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:44:29,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 74 conjunts are in the unsatisfiable core [2023-12-02 14:44:29,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:44:29,755 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 14:44:29,851 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 14:44:29,851 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 14:44:29,946 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 14:44:30,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 14:44:30,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2023-12-02 14:44:30,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-02 14:44:30,225 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 9 treesize of output 3 [2023-12-02 14:44:30,299 INFO L349 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2023-12-02 14:44:30,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 16 [2023-12-02 14:44:30,304 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:44:30,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:44:30,455 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 123 treesize of output 111 [2023-12-02 14:44:45,299 INFO L349 Elim1Store]: treesize reduction 66, result has 69.6 percent of original size [2023-12-02 14:44:45,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 4362 treesize of output 4028 [2023-12-02 14:45:27,258 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:45:27,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 292 treesize of output 708 [2023-12-02 14:46:20,377 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 14:46:20,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 1 [2023-12-02 14:46:20,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 14 treesize of output 12 [2023-12-02 14:46:20,428 INFO L349 Elim1Store]: treesize reduction 440, result has 0.2 percent of original size [2023-12-02 14:46:20,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 260 treesize of output 1 [2023-12-02 14:46:20,435 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:46:20,442 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2023-12-02 14:46:20,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 1 [2023-12-02 14:46:20,461 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2023-12-02 14:46:20,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 1 [2023-12-02 14:46:20,465 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:46:20,468 WARN L214 Elim1Store]: Array PQE input equivalent to true [2023-12-02 14:46:20,515 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:46:20,684 INFO L349 Elim1Store]: treesize reduction 12320, result has 0.0 percent of original size [2023-12-02 14:46:20,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 56 select indices, 56 select index equivalence classes, 1 disjoint index pairs (out of 1540 index pairs), introduced 56 new quantified variables, introduced 1540 case distinctions, treesize of input 1479 treesize of output 1 [2023-12-02 14:46:20,696 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:46:20,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:46:20,710 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:46:20,711 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:46:20,714 WARN L214 Elim1Store]: Array PQE input equivalent to true [2023-12-02 14:46:20,745 INFO L349 Elim1Store]: treesize reduction 440, result has 0.2 percent of original size [2023-12-02 14:46:20,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 260 treesize of output 1 [2023-12-02 14:46:20,763 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2023-12-02 14:46:20,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 113 treesize of output 1 [2023-12-02 14:46:20,778 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:46:20,778 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 92 treesize of output 94 [2023-12-02 14:46:20,872 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2023-12-02 14:46:20,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 1 [2023-12-02 14:46:21,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035581487] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:46:21,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [432153001] [2023-12-02 14:46:21,355 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-12-02 14:46:21,355 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:46:21,355 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:46:21,355 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:46:21,355 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:46:22,085 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 152 for LOIs [2023-12-02 14:46:22,193 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 19 for LOIs [2023-12-02 14:46:22,202 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:46:34,298 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10641#(and (or (not (= |ULTIMATE.start_loop_~nested_list~0#1.offset| 0)) (not (= |ULTIMATE.start_loop_~nested_list~0#1.base| 0))) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~l~0#1.offset| 0) (= |ULTIMATE.start_create_#res#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_loop_~nested_list~0#1.base|) 1)) (= |ULTIMATE.start_loop_~l#1.offset| 0) (= |ULTIMATE.start_loop_#in~l#1.offset| 0))' at error location [2023-12-02 14:46:34,298 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:46:34,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 14:46:34,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 31 [2023-12-02 14:46:34,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113228051] [2023-12-02 14:46:34,298 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 14:46:34,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-02 14:46:34,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:46:34,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-02 14:46:34,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=3695, Unknown=6, NotChecked=0, Total=3906 [2023-12-02 14:46:34,301 INFO L87 Difference]: Start difference. First operand 205 states and 299 transitions. Second operand has 32 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 14:46:35,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:46:35,718 INFO L93 Difference]: Finished difference Result 220 states and 320 transitions. [2023-12-02 14:46:35,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 14:46:35,718 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 32 [2023-12-02 14:46:35,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:46:35,720 INFO L225 Difference]: With dead ends: 220 [2023-12-02 14:46:35,720 INFO L226 Difference]: Without dead ends: 220 [2023-12-02 14:46:35,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1166 ImplicationChecksByTransitivity, 32.9s TimeCoverageRelationStatistics Valid=267, Invalid=4697, Unknown=6, NotChecked=0, Total=4970 [2023-12-02 14:46:35,722 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 58 mSDsluCounter, 977 mSDsCounter, 0 mSdLazyCounter, 1371 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 1039 SdHoareTripleChecker+Invalid, 1392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 14:46:35,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 1039 Invalid, 1392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1371 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 14:46:35,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2023-12-02 14:46:35,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 207. [2023-12-02 14:46:35,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 171 states have (on average 1.654970760233918) internal successors, (283), 194 states have internal predecessors, (283), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 14:46:35,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 303 transitions. [2023-12-02 14:46:35,729 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 303 transitions. Word has length 32 [2023-12-02 14:46:35,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:46:35,729 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 303 transitions. [2023-12-02 14:46:35,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 14:46:35,729 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 303 transitions. [2023-12-02 14:46:35,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 14:46:35,730 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:46:35,730 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:46:35,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 14:46:35,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:46:35,931 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:46:35,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:46:35,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1070334002, now seen corresponding path program 1 times [2023-12-02 14:46:35,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:46:35,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633098513] [2023-12-02 14:46:35,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:46:35,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:46:35,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:46:36,755 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:46:36,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:46:36,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633098513] [2023-12-02 14:46:36,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633098513] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:46:36,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604064999] [2023-12-02 14:46:36,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:46:36,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:46:36,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:46:36,757 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:46:36,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 14:46:36,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:46:36,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 82 conjunts are in the unsatisfiable core [2023-12-02 14:46:36,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:46:36,882 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 14:46:37,009 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 14:46:37,009 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 14:46:37,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 14:46:37,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 14:46:37,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2023-12-02 14:46:37,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2023-12-02 14:46:37,548 INFO L349 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2023-12-02 14:46:37,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 23 [2023-12-02 14:46:37,555 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:46:37,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:46:38,019 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:46:38,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 6765 treesize of output 6425 [2023-12-02 14:46:38,855 INFO L349 Elim1Store]: treesize reduction 198, result has 57.0 percent of original size [2023-12-02 14:46:38,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 11 new quantified variables, introduced 45 case distinctions, treesize of input 77410 treesize of output 70499 [2023-12-02 14:49:52,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2023-12-02 14:49:52,188 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2023-12-02 14:49:52,189 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2023-12-02 14:49:52,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [482210404] [2023-12-02 14:49:52,190 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-12-02 14:49:52,191 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:49:52,191 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:49:52,191 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:49:52,191 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:49:52,195 FATAL L? ?]: Ignoring exception! de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:177) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:132) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.checkSatTerm(SmtUtils.java:332) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.isFalse(SymbolicTools.java:223) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.RelationCheckUtil.isEqBottom_SolverAlphaSolver(RelationCheckUtil.java:56) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.ExplicitValueDomain.isEqBottom(ExplicitValueDomain.java:73) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.CompoundDomain.isEqBottom(CompoundDomain.java:84) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StatsWrapperDomain.isEqBottom(StatsWrapperDomain.java:69) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.earlyExitAfterStep(DagInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:175) ... 44 more [2023-12-02 14:49:52,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:49:52,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-12-02 14:49:52,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725336343] [2023-12-02 14:49:52,198 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 14:49:52,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-02 14:49:52,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:49:52,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-02 14:49:52,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1304, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 14:49:52,199 INFO L87 Difference]: Start difference. First operand 207 states and 303 transitions. Second operand has 21 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 14:49:52,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=102, Invalid=1304, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 14:49:52,201 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:49:52,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:49:52,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-02 14:49:52,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:49:52,402 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:177) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:138) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertCodeBlock(IncrementalHoareTripleChecker.java:436) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:278) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:284) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.releaseLock(ChainingHoareTripleChecker.java:449) at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1655) at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:658) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.releaseLock(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:159) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:365) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:325) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:175) ... 36 more [2023-12-02 14:49:52,403 INFO L158 Benchmark]: Toolchain (without parser) took 413999.25ms. Allocated memory was 113.2MB in the beginning and 717.2MB in the end (delta: 604.0MB). Free memory was 55.0MB in the beginning and 510.2MB in the end (delta: -455.2MB). Peak memory consumption was 151.4MB. Max. memory is 16.1GB. [2023-12-02 14:49:52,404 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 113.2MB. Free memory is still 68.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 14:49:52,404 INFO L158 Benchmark]: CACSL2BoogieTranslator took 425.85ms. Allocated memory was 113.2MB in the beginning and 163.6MB in the end (delta: 50.3MB). Free memory was 54.9MB in the beginning and 122.6MB in the end (delta: -67.8MB). Peak memory consumption was 13.8MB. Max. memory is 16.1GB. [2023-12-02 14:49:52,404 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.79ms. Allocated memory is still 163.6MB. Free memory was 122.6MB in the beginning and 120.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 14:49:52,404 INFO L158 Benchmark]: Boogie Preprocessor took 33.99ms. Allocated memory is still 163.6MB. Free memory was 120.5MB in the beginning and 119.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 14:49:52,404 INFO L158 Benchmark]: RCFGBuilder took 544.71ms. Allocated memory is still 163.6MB. Free memory was 118.4MB in the beginning and 91.2MB in the end (delta: 27.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2023-12-02 14:49:52,405 INFO L158 Benchmark]: TraceAbstraction took 412945.17ms. Allocated memory was 163.6MB in the beginning and 717.2MB in the end (delta: 553.6MB). Free memory was 90.7MB in the beginning and 510.2MB in the end (delta: -419.5MB). Peak memory consumption was 135.5MB. Max. memory is 16.1GB. [2023-12-02 14:49:52,406 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 113.2MB. Free memory is still 68.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 425.85ms. Allocated memory was 113.2MB in the beginning and 163.6MB in the end (delta: 50.3MB). Free memory was 54.9MB in the beginning and 122.6MB in the end (delta: -67.8MB). Peak memory consumption was 13.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.79ms. Allocated memory is still 163.6MB. Free memory was 122.6MB in the beginning and 120.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 33.99ms. Allocated memory is still 163.6MB. Free memory was 120.5MB in the beginning and 119.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 544.71ms. Allocated memory is still 163.6MB. Free memory was 118.4MB in the beginning and 91.2MB in the end (delta: 27.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * TraceAbstraction took 412945.17ms. Allocated memory was 163.6MB in the beginning and 717.2MB in the end (delta: 553.6MB). Free memory was 90.7MB in the beginning and 510.2MB in the end (delta: -419.5MB). Peak memory consumption was 135.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/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_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-broom/sll-nested-sll-inline.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/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 2a031cd83911a702ba38b9e8637ad5ead7999efd0a578b82d9c2168fee0ee72e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 14:49:54,097 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 14:49:54,173 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Bitvector.epf [2023-12-02 14:49:54,179 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 14:49:54,180 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 14:49:54,207 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 14:49:54,208 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 14:49:54,208 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 14:49:54,209 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 14:49:54,210 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 14:49:54,210 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 14:49:54,211 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 14:49:54,211 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 14:49:54,212 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 14:49:54,212 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 14:49:54,213 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 14:49:54,214 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 14:49:54,214 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 14:49:54,215 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 14:49:54,216 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 14:49:54,216 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 14:49:54,217 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 14:49:54,218 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 14:49:54,218 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 14:49:54,219 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 14:49:54,219 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 14:49:54,220 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-02 14:49:54,220 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-02 14:49:54,220 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 14:49:54,221 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 14:49:54,221 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 14:49:54,222 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-02 14:49:54,222 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 14:49:54,222 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 14:49:54,222 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:49:54,223 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 14:49:54,223 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 14:49:54,223 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-12-02 14:49:54,224 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-02 14:49:54,224 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 14:49:54,224 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 14:49:54,224 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 14:49:54,225 INFO L153 SettingsManager]: * Logic for external solver=AUFBV 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_4a460297-0eca-4306-95ce-52550224948a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a031cd83911a702ba38b9e8637ad5ead7999efd0a578b82d9c2168fee0ee72e [2023-12-02 14:49:54,492 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 14:49:54,508 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 14:49:54,510 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 14:49:54,511 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 14:49:54,511 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 14:49:54,513 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/memsafety-broom/sll-nested-sll-inline.i [2023-12-02 14:49:57,237 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 14:49:57,511 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 14:49:57,512 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/sv-benchmarks/c/memsafety-broom/sll-nested-sll-inline.i [2023-12-02 14:49:57,537 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/data/cf966b99c/9fd4ff24112e4edda5dfa991b20c0a89/FLAGbe3175e8c [2023-12-02 14:49:57,551 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/data/cf966b99c/9fd4ff24112e4edda5dfa991b20c0a89 [2023-12-02 14:49:57,553 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 14:49:57,555 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 14:49:57,556 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 14:49:57,556 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 14:49:57,560 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 14:49:57,561 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:49:57" (1/1) ... [2023-12-02 14:49:57,562 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c2f34a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:49:57, skipping insertion in model container [2023-12-02 14:49:57,563 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:49:57" (1/1) ... [2023-12-02 14:49:57,634 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 14:49:57,881 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:49:57,890 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 14:49:57,936 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:49:57,983 INFO L206 MainTranslator]: Completed translation [2023-12-02 14:49:57,983 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:49:57 WrapperNode [2023-12-02 14:49:57,983 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 14:49:57,985 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 14:49:57,985 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 14:49:57,986 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 14:49:57,993 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:49:57" (1/1) ... [2023-12-02 14:49:58,031 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:49:57" (1/1) ... [2023-12-02 14:49:58,055 INFO L138 Inliner]: procedures = 120, calls = 33, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 118 [2023-12-02 14:49:58,056 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 14:49:58,056 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 14:49:58,057 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 14:49:58,057 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 14:49:58,064 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:49:57" (1/1) ... [2023-12-02 14:49:58,065 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:49:57" (1/1) ... [2023-12-02 14:49:58,068 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:49:57" (1/1) ... [2023-12-02 14:49:58,069 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:49:57" (1/1) ... [2023-12-02 14:49:58,079 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:49:57" (1/1) ... [2023-12-02 14:49:58,082 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:49:57" (1/1) ... [2023-12-02 14:49:58,085 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:49:57" (1/1) ... [2023-12-02 14:49:58,087 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:49:57" (1/1) ... [2023-12-02 14:49:58,091 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 14:49:58,092 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 14:49:58,092 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 14:49:58,093 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 14:49:58,093 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:49:57" (1/1) ... [2023-12-02 14:49:58,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:49:58,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:49:58,117 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 14:49:58,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 14:49:58,154 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero_internal [2023-12-02 14:49:58,154 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero_internal [2023-12-02 14:49:58,154 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero [2023-12-02 14:49:58,154 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero [2023-12-02 14:49:58,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 14:49:58,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 14:49:58,155 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 14:49:58,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 14:49:58,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 14:49:58,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 14:49:58,271 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 14:49:58,273 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 14:49:58,855 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 14:49:58,914 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 14:49:58,914 INFO L309 CfgBuilder]: Removed 7 assume(true) statements. [2023-12-02 14:49:58,915 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:49:58 BoogieIcfgContainer [2023-12-02 14:49:58,915 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 14:49:58,918 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 14:49:58,918 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 14:49:58,921 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 14:49:58,921 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:49:57" (1/3) ... [2023-12-02 14:49:58,922 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f737ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:49:58, skipping insertion in model container [2023-12-02 14:49:58,922 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:49:57" (2/3) ... [2023-12-02 14:49:58,937 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f737ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:49:58, skipping insertion in model container [2023-12-02 14:49:58,937 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:49:58" (3/3) ... [2023-12-02 14:49:58,938 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-nested-sll-inline.i [2023-12-02 14:49:58,955 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 14:49:58,955 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 43 error locations. [2023-12-02 14:49:58,995 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 14:49:59,001 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;@2017a83a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 14:49:59,001 INFO L358 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2023-12-02 14:49:59,005 INFO L276 IsEmpty]: Start isEmpty. Operand has 96 states, 44 states have (on average 2.2954545454545454) internal successors, (101), 87 states have internal predecessors, (101), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 14:49:59,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 14:49:59,011 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:49:59,012 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 14:49:59,012 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:49:59,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:49:59,018 INFO L85 PathProgramCache]: Analyzing trace with hash 7603434, now seen corresponding path program 1 times [2023-12-02 14:49:59,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:49:59,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1932501641] [2023-12-02 14:49:59,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:49:59,030 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:49:59,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:49:59,048 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 14:49:59,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-12-02 14:49:59,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:49:59,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 14:49:59,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:49:59,198 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 7 [2023-12-02 14:49:59,210 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 14:49:59,210 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:49:59,211 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:49:59,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1932501641] [2023-12-02 14:49:59,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1932501641] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:49:59,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:49:59,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 14:49:59,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458224469] [2023-12-02 14:49:59,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:49:59,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:49:59,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:49:59,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:49:59,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:49:59,248 INFO L87 Difference]: Start difference. First operand has 96 states, 44 states have (on average 2.2954545454545454) internal successors, (101), 87 states have internal predecessors, (101), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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 14:49:59,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:49:59,586 INFO L93 Difference]: Finished difference Result 94 states and 104 transitions. [2023-12-02 14:49:59,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:49:59,588 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 14:49:59,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:49:59,595 INFO L225 Difference]: With dead ends: 94 [2023-12-02 14:49:59,595 INFO L226 Difference]: Without dead ends: 93 [2023-12-02 14:49:59,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:49:59,600 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 4 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:49:59,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 139 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 14:49:59,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-12-02 14:49:59,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2023-12-02 14:49:59,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 84 states have internal predecessors, (91), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 14:49:59,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2023-12-02 14:49:59,635 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 4 [2023-12-02 14:49:59,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:49:59,636 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2023-12-02 14:49:59,636 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 14:49:59,636 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2023-12-02 14:49:59,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 14:49:59,636 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:49:59,636 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 14:49:59,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-12-02 14:49:59,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:49:59,839 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:49:59,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:49:59,839 INFO L85 PathProgramCache]: Analyzing trace with hash 7603435, now seen corresponding path program 1 times [2023-12-02 14:49:59,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:49:59,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1651222459] [2023-12-02 14:49:59,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:49:59,840 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:49:59,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:49:59,842 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 14:49:59,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-12-02 14:49:59,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:49:59,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 14:49:59,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:49:59,893 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 14:49:59,908 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 14:49:59,909 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:49:59,909 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:49:59,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1651222459] [2023-12-02 14:49:59,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1651222459] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:49:59,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:49:59,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 14:49:59,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785771440] [2023-12-02 14:49:59,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:49:59,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:49:59,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:49:59,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:49:59,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:49:59,913 INFO L87 Difference]: Start difference. First operand 93 states and 103 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 14:50:00,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:50:00,386 INFO L93 Difference]: Finished difference Result 91 states and 101 transitions. [2023-12-02 14:50:00,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:50:00,387 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 14:50:00,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:50:00,389 INFO L225 Difference]: With dead ends: 91 [2023-12-02 14:50:00,389 INFO L226 Difference]: Without dead ends: 91 [2023-12-02 14:50:00,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:50:00,391 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 2 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 14:50:00,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 144 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 14:50:00,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-12-02 14:50:00,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2023-12-02 14:50:00,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 44 states have (on average 2.022727272727273) internal successors, (89), 82 states have internal predecessors, (89), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 14:50:00,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2023-12-02 14:50:00,403 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 4 [2023-12-02 14:50:00,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:50:00,403 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2023-12-02 14:50:00,403 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 14:50:00,404 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2023-12-02 14:50:00,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 14:50:00,404 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:50:00,404 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:50:00,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-12-02 14:50:00,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:00,605 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting alloc_and_zero_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:50:00,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:50:00,606 INFO L85 PathProgramCache]: Analyzing trace with hash 36302357, now seen corresponding path program 1 times [2023-12-02 14:50:00,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:50:00,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [380304061] [2023-12-02 14:50:00,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:00,607 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:00,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:50:00,609 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 14:50:00,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-12-02 14:50:00,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:50:00,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 14:50:00,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:50:00,696 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 7 [2023-12-02 14:50:00,702 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 14:50:00,702 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:50:00,703 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:50:00,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [380304061] [2023-12-02 14:50:00,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [380304061] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:50:00,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:50:00,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 14:50:00,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483896349] [2023-12-02 14:50:00,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:50:00,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:50:00,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:50:00,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:50:00,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:50:00,706 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 14:50:00,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:50:00,954 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2023-12-02 14:50:00,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:50:00,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-12-02 14:50:00,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:50:00,956 INFO L225 Difference]: With dead ends: 90 [2023-12-02 14:50:00,957 INFO L226 Difference]: Without dead ends: 90 [2023-12-02 14:50:00,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 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 14:50:00,958 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 2 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 14:50:00,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 135 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 14:50:00,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-12-02 14:50:00,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2023-12-02 14:50:00,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 44 states have (on average 2.0) internal successors, (88), 81 states have internal predecessors, (88), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 14:50:00,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2023-12-02 14:50:00,968 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 10 [2023-12-02 14:50:00,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:50:00,969 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2023-12-02 14:50:00,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 14:50:00,969 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2023-12-02 14:50:00,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 14:50:00,970 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:50:00,970 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:50:00,973 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-12-02 14:50:01,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:01,171 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting alloc_and_zero_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:50:01,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:50:01,171 INFO L85 PathProgramCache]: Analyzing trace with hash 36302358, now seen corresponding path program 1 times [2023-12-02 14:50:01,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:50:01,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1107015881] [2023-12-02 14:50:01,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:01,172 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:01,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:50:01,173 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 14:50:01,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-12-02 14:50:01,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:50:01,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 14:50:01,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:50:01,251 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 14:50:01,265 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 14:50:01,265 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:50:01,266 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:50:01,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1107015881] [2023-12-02 14:50:01,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1107015881] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:50:01,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:50:01,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 14:50:01,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633936504] [2023-12-02 14:50:01,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:50:01,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:50:01,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:50:01,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:50:01,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:50:01,269 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 14:50:01,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:50:01,650 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2023-12-02 14:50:01,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:50:01,651 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-12-02 14:50:01,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:50:01,652 INFO L225 Difference]: With dead ends: 89 [2023-12-02 14:50:01,652 INFO L226 Difference]: Without dead ends: 89 [2023-12-02 14:50:01,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 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 14:50:01,654 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 1 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 14:50:01,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 140 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 14:50:01,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-12-02 14:50:01,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2023-12-02 14:50:01,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 80 states have internal predecessors, (87), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 14:50:01,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2023-12-02 14:50:01,662 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 10 [2023-12-02 14:50:01,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:50:01,662 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2023-12-02 14:50:01,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 14:50:01,663 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2023-12-02 14:50:01,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 14:50:01,663 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:50:01,663 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:50:01,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-12-02 14:50:01,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:01,864 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:50:01,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:50:01,864 INFO L85 PathProgramCache]: Analyzing trace with hash 2067485473, now seen corresponding path program 1 times [2023-12-02 14:50:01,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:50:01,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [246340773] [2023-12-02 14:50:01,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:01,865 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:01,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:50:01,866 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 14:50:01,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-12-02 14:50:01,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:50:01,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 14:50:01,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:50:01,955 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 7 [2023-12-02 14:50:02,034 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base (_ BitVec 64))) (= (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (_ bv1 1)) |c_#valid|)) is different from true [2023-12-02 14:50:02,067 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-02 14:50:02,067 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 1 case distinctions, treesize of input 14 treesize of output 20 [2023-12-02 14:50:02,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:50:02,099 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:50:02,100 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:50:02,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [246340773] [2023-12-02 14:50:02,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [246340773] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:50:02,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:50:02,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 14:50:02,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27585698] [2023-12-02 14:50:02,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:50:02,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 14:50:02,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:50:02,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 14:50:02,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=32, Unknown=1, NotChecked=10, Total=56 [2023-12-02 14:50:02,102 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:50:02,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:50:02,664 INFO L93 Difference]: Finished difference Result 97 states and 111 transitions. [2023-12-02 14:50:02,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 14:50:02,665 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2023-12-02 14:50:02,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:50:02,667 INFO L225 Difference]: With dead ends: 97 [2023-12-02 14:50:02,668 INFO L226 Difference]: Without dead ends: 97 [2023-12-02 14:50:02,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=42, Unknown=1, NotChecked=12, Total=72 [2023-12-02 14:50:02,672 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 11 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 14:50:02,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 285 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 255 Invalid, 0 Unknown, 142 Unchecked, 0.5s Time] [2023-12-02 14:50:02,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-12-02 14:50:02,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2023-12-02 14:50:02,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 82 states have internal predecessors, (91), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 14:50:02,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2023-12-02 14:50:02,680 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 15 [2023-12-02 14:50:02,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:50:02,681 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2023-12-02 14:50:02,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:50:02,681 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2023-12-02 14:50:02,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 14:50:02,682 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:50:02,682 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:50:02,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-12-02 14:50:02,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:02,884 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:50:02,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:50:02,885 INFO L85 PathProgramCache]: Analyzing trace with hash 2067485474, now seen corresponding path program 1 times [2023-12-02 14:50:02,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:50:02,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1715308152] [2023-12-02 14:50:02,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:02,885 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:02,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:50:02,886 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 14:50:02,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-12-02 14:50:02,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:50:02,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 14:50:02,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:50:02,977 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 7 [2023-12-02 14:50:02,988 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 14:50:03,185 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base (_ BitVec 64))) (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) (_ bv0 1)))) is different from true [2023-12-02 14:50:03,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:03,222 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 14:50:03,238 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 14:50:03,238 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 13 treesize of output 13 [2023-12-02 14:50:03,285 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 14:50:03,286 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:50:03,286 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:50:03,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1715308152] [2023-12-02 14:50:03,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1715308152] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:50:03,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:50:03,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 14:50:03,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227527480] [2023-12-02 14:50:03,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:50:03,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 14:50:03,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:50:03,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 14:50:03,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=43, Unknown=1, NotChecked=12, Total=72 [2023-12-02 14:50:03,288 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand has 9 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:50:04,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:50:04,122 INFO L93 Difference]: Finished difference Result 96 states and 110 transitions. [2023-12-02 14:50:04,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 14:50:04,123 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2023-12-02 14:50:04,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:50:04,124 INFO L225 Difference]: With dead ends: 96 [2023-12-02 14:50:04,124 INFO L226 Difference]: Without dead ends: 96 [2023-12-02 14:50:04,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=55, Unknown=1, NotChecked=14, Total=90 [2023-12-02 14:50:04,125 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 9 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 14:50:04,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 251 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 301 Invalid, 0 Unknown, 146 Unchecked, 0.8s Time] [2023-12-02 14:50:04,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-12-02 14:50:04,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2023-12-02 14:50:04,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 82 states have internal predecessors, (90), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 14:50:04,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 102 transitions. [2023-12-02 14:50:04,133 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 102 transitions. Word has length 15 [2023-12-02 14:50:04,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:50:04,133 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 102 transitions. [2023-12-02 14:50:04,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:50:04,133 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 102 transitions. [2023-12-02 14:50:04,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 14:50:04,134 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:50:04,134 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:50:04,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-12-02 14:50:04,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:04,335 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:50:04,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:50:04,336 INFO L85 PathProgramCache]: Analyzing trace with hash 94334936, now seen corresponding path program 1 times [2023-12-02 14:50:04,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:50:04,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [662895352] [2023-12-02 14:50:04,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:04,336 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:04,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:50:04,337 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 14:50:04,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-12-02 14:50:04,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:50:04,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 14:50:04,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:50:04,435 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 7 [2023-12-02 14:50:04,492 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base (_ BitVec 64))) (= (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (_ bv1 1)) |c_#valid|)) is different from true [2023-12-02 14:50:04,511 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-02 14:50:04,512 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 1 case distinctions, treesize of input 14 treesize of output 20 [2023-12-02 14:50:04,528 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 14:50:04,529 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:50:04,713 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 14:50:04,713 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:50:04,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [662895352] [2023-12-02 14:50:04,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [662895352] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:50:04,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1681133360] [2023-12-02 14:50:04,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:04,714 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 14:50:04,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 14:50:04,716 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 14:50:04,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2023-12-02 14:50:04,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:50:04,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 14:50:04,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:50:04,916 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 7 [2023-12-02 14:50:04,963 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-02 14:50:04,963 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 1 case distinctions, treesize of input 14 treesize of output 20 [2023-12-02 14:50:04,985 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 14:50:04,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:50:05,158 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 14:50:05,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1681133360] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:50:05,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014977215] [2023-12-02 14:50:05,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:05,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:50:05,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:50:05,160 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:50:05,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 14:50:05,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:50:05,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 14:50:05,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:50:05,283 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base (_ BitVec 64))) (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) (_ bv0 1)))) is different from true [2023-12-02 14:50:05,318 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 14:50:05,319 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 21 treesize of output 20 [2023-12-02 14:50:05,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-12-02 14:50:05,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:50:05,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:50:05,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014977215] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:50:05,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 14:50:05,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7, 6, 6, 5] total 9 [2023-12-02 14:50:05,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351184469] [2023-12-02 14:50:05,503 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 14:50:05,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 14:50:05,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:50:05,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 14:50:05,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=44, Unknown=2, NotChecked=26, Total=90 [2023-12-02 14:50:05,505 INFO L87 Difference]: Start difference. First operand 91 states and 102 transitions. Second operand has 10 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 14:50:06,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:50:06,298 INFO L93 Difference]: Finished difference Result 101 states and 116 transitions. [2023-12-02 14:50:06,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 14:50:06,299 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 19 [2023-12-02 14:50:06,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:50:06,300 INFO L225 Difference]: With dead ends: 101 [2023-12-02 14:50:06,300 INFO L226 Difference]: Without dead ends: 101 [2023-12-02 14:50:06,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 90 SyntacticMatches, 10 SemanticMatches, 10 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=68, Unknown=2, NotChecked=34, Total=132 [2023-12-02 14:50:06,300 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 15 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 228 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 14:50:06,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 282 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 279 Invalid, 0 Unknown, 228 Unchecked, 0.7s Time] [2023-12-02 14:50:06,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-12-02 14:50:06,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 91. [2023-12-02 14:50:06,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 48 states have (on average 1.875) internal successors, (90), 81 states have internal predecessors, (90), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 14:50:06,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 104 transitions. [2023-12-02 14:50:06,306 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 104 transitions. Word has length 19 [2023-12-02 14:50:06,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:50:06,306 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 104 transitions. [2023-12-02 14:50:06,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 14:50:06,306 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 104 transitions. [2023-12-02 14:50:06,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 14:50:06,307 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:50:06,307 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:50:06,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 14:50:06,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2023-12-02 14:50:06,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-12-02 14:50:06,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:06,908 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:50:06,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:50:06,909 INFO L85 PathProgramCache]: Analyzing trace with hash 94334937, now seen corresponding path program 1 times [2023-12-02 14:50:06,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:50:06,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1360903495] [2023-12-02 14:50:06,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:06,909 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:06,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:50:06,910 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 14:50:06,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-12-02 14:50:06,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:50:07,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 14:50:07,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:50:07,012 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 14:50:07,111 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base (_ BitVec 64))) (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (_ bv8 64)) |c_#length|)) is different from true [2023-12-02 14:50:07,135 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-12-02 14:50:07,135 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 1 case distinctions, treesize of input 12 treesize of output 14 [2023-12-02 14:50:07,156 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 14:50:07,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:50:07,493 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:50:07,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1360903495] [2023-12-02 14:50:07,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1360903495] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:50:07,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [958394038] [2023-12-02 14:50:07,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:07,493 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 14:50:07,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 14:50:07,494 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 14:50:07,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2023-12-02 14:50:07,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:50:07,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 14:50:07,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:50:07,669 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 14:50:07,675 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 7 [2023-12-02 14:50:07,888 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base (_ BitVec 64))) (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) (_ bv0 1)))) is different from true [2023-12-02 14:50:07,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:07,917 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 14:50:07,930 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 14:50:07,931 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 13 treesize of output 13 [2023-12-02 14:50:07,934 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 14:50:07,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:50:10,076 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv8 64) |c_ULTIMATE.start_create_~nested_now~0#1.offset|))) (and (forall ((v_alloc_and_zero_internal_~pi~1.base_38 (_ BitVec 64))) (or (not (= (select |c_#valid| v_alloc_and_zero_internal_~pi~1.base_38) (_ bv0 1))) (forall ((v_ArrVal_202 (_ BitVec 64))) (bvule .cse0 (select (store |c_#length| v_alloc_and_zero_internal_~pi~1.base_38 v_ArrVal_202) |c_ULTIMATE.start_create_~nested_now~0#1.base|))))) (or (forall ((v_alloc_and_zero_internal_~pi~1.base_38 (_ BitVec 64))) (not (= (select |c_#valid| v_alloc_and_zero_internal_~pi~1.base_38) (_ bv0 1)))) (bvule |c_ULTIMATE.start_create_~nested_now~0#1.offset| .cse0)))) is different from false [2023-12-02 14:50:10,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [958394038] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:50:10,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124390333] [2023-12-02 14:50:10,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:10,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:50:10,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:50:10,088 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:50:10,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 14:50:10,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:50:10,176 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 14:50:10,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:50:10,185 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 14:50:10,191 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 7 [2023-12-02 14:50:10,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:10,302 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 14:50:10,316 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 14:50:10,316 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 13 treesize of output 13 [2023-12-02 14:50:10,318 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 14:50:10,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:50:10,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124390333] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:50:10,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:50:10,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 13 [2023-12-02 14:50:10,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159293251] [2023-12-02 14:50:10,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:50:10,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 14:50:10,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:50:10,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 14:50:10,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=175, Unknown=3, NotChecked=84, Total=306 [2023-12-02 14:50:10,656 INFO L87 Difference]: Start difference. First operand 91 states and 104 transitions. Second operand has 14 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 14:50:11,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:50:11,896 INFO L93 Difference]: Finished difference Result 96 states and 110 transitions. [2023-12-02 14:50:11,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 14:50:11,897 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 19 [2023-12-02 14:50:11,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:50:11,898 INFO L225 Difference]: With dead ends: 96 [2023-12-02 14:50:11,898 INFO L226 Difference]: Without dead ends: 96 [2023-12-02 14:50:11,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=55, Invalid=225, Unknown=4, NotChecked=96, Total=380 [2023-12-02 14:50:11,899 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 12 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:50:11,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 427 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 418 Invalid, 0 Unknown, 216 Unchecked, 1.0s Time] [2023-12-02 14:50:11,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-12-02 14:50:11,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2023-12-02 14:50:11,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 49 states have (on average 1.836734693877551) internal successors, (90), 82 states have internal predecessors, (90), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 14:50:11,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 104 transitions. [2023-12-02 14:50:11,903 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 104 transitions. Word has length 19 [2023-12-02 14:50:11,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:50:11,904 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 104 transitions. [2023-12-02 14:50:11,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 14:50:11,904 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 104 transitions. [2023-12-02 14:50:11,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 14:50:11,905 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:50:11,905 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:50:11,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2023-12-02 14:50:12,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 14:50:12,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2023-12-02 14:50:12,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:12,506 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:50:12,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:50:12,506 INFO L85 PathProgramCache]: Analyzing trace with hash 755943574, now seen corresponding path program 1 times [2023-12-02 14:50:12,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:50:12,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1244617202] [2023-12-02 14:50:12,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:12,507 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:12,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:50:12,508 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 14:50:12,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-12-02 14:50:12,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:50:12,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 14:50:12,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:50:12,628 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 14:50:12,628 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:50:12,628 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:50:12,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1244617202] [2023-12-02 14:50:12,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1244617202] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:50:12,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:50:12,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 14:50:12,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942962761] [2023-12-02 14:50:12,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:50:12,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 14:50:12,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:50:12,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 14:50:12,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 14:50:12,630 INFO L87 Difference]: Start difference. First operand 92 states and 104 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:50:13,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:50:13,124 INFO L93 Difference]: Finished difference Result 124 states and 144 transitions. [2023-12-02 14:50:13,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 14:50:13,125 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2023-12-02 14:50:13,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:50:13,127 INFO L225 Difference]: With dead ends: 124 [2023-12-02 14:50:13,127 INFO L226 Difference]: Without dead ends: 124 [2023-12-02 14:50:13,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 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 14:50:13,128 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 47 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 14:50:13,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 201 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 14:50:13,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-12-02 14:50:13,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 110. [2023-12-02 14:50:13,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 65 states have (on average 1.8461538461538463) internal successors, (120), 97 states have internal predecessors, (120), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 14:50:13,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 140 transitions. [2023-12-02 14:50:13,134 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 140 transitions. Word has length 20 [2023-12-02 14:50:13,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:50:13,134 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 140 transitions. [2023-12-02 14:50:13,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:50:13,134 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 140 transitions. [2023-12-02 14:50:13,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 14:50:13,135 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:50:13,135 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:50:13,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2023-12-02 14:50:13,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:13,336 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:50:13,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:50:13,336 INFO L85 PathProgramCache]: Analyzing trace with hash 755943575, now seen corresponding path program 1 times [2023-12-02 14:50:13,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:50:13,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [701669761] [2023-12-02 14:50:13,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:13,337 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:13,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:50:13,338 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 14:50:13,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-12-02 14:50:13,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:50:13,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 14:50:13,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:50:13,577 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 14:50:13,577 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:50:13,577 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:50:13,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [701669761] [2023-12-02 14:50:13,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [701669761] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:50:13,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:50:13,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 14:50:13,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301577409] [2023-12-02 14:50:13,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:50:13,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 14:50:13,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:50:13,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 14:50:13,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 14:50:13,579 INFO L87 Difference]: Start difference. First operand 110 states and 140 transitions. Second operand has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:50:14,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:50:14,336 INFO L93 Difference]: Finished difference Result 129 states and 151 transitions. [2023-12-02 14:50:14,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 14:50:14,337 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2023-12-02 14:50:14,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:50:14,338 INFO L225 Difference]: With dead ends: 129 [2023-12-02 14:50:14,338 INFO L226 Difference]: Without dead ends: 129 [2023-12-02 14:50:14,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-02 14:50:14,339 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 40 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 14:50:14,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 404 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 14:50:14,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-12-02 14:50:14,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 116. [2023-12-02 14:50:14,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 71 states have (on average 1.8309859154929577) internal successors, (130), 103 states have internal predecessors, (130), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 14:50:14,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 150 transitions. [2023-12-02 14:50:14,345 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 150 transitions. Word has length 20 [2023-12-02 14:50:14,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:50:14,345 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 150 transitions. [2023-12-02 14:50:14,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:50:14,345 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 150 transitions. [2023-12-02 14:50:14,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 14:50:14,346 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:50:14,346 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:50:14,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2023-12-02 14:50:14,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:14,547 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:50:14,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:50:14,547 INFO L85 PathProgramCache]: Analyzing trace with hash 612271540, now seen corresponding path program 1 times [2023-12-02 14:50:14,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:50:14,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1085618713] [2023-12-02 14:50:14,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:14,548 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:14,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:50:14,549 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 14:50:14,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-12-02 14:50:14,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:50:14,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 14:50:14,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:50:14,697 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 14:50:14,698 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:50:14,698 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:50:14,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1085618713] [2023-12-02 14:50:14,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1085618713] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:50:14,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:50:14,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 14:50:14,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058476119] [2023-12-02 14:50:14,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:50:14,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 14:50:14,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:50:14,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 14:50:14,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 14:50:14,700 INFO L87 Difference]: Start difference. First operand 116 states and 150 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:50:15,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:50:15,024 INFO L93 Difference]: Finished difference Result 126 states and 159 transitions. [2023-12-02 14:50:15,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 14:50:15,025 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-12-02 14:50:15,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:50:15,026 INFO L225 Difference]: With dead ends: 126 [2023-12-02 14:50:15,026 INFO L226 Difference]: Without dead ends: 126 [2023-12-02 14:50:15,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 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 14:50:15,027 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 40 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:50:15,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 410 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 14:50:15,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-12-02 14:50:15,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 117. [2023-12-02 14:50:15,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 72 states have (on average 1.7916666666666667) internal successors, (129), 104 states have internal predecessors, (129), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 14:50:15,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 149 transitions. [2023-12-02 14:50:15,032 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 149 transitions. Word has length 22 [2023-12-02 14:50:15,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:50:15,033 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 149 transitions. [2023-12-02 14:50:15,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:50:15,033 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 149 transitions. [2023-12-02 14:50:15,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 14:50:15,033 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:50:15,034 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:50:15,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2023-12-02 14:50:15,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:15,234 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:50:15,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:50:15,235 INFO L85 PathProgramCache]: Analyzing trace with hash 612415883, now seen corresponding path program 1 times [2023-12-02 14:50:15,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:50:15,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2117058352] [2023-12-02 14:50:15,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:15,235 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:15,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:50:15,236 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 14:50:15,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-12-02 14:50:15,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:50:15,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-02 14:50:15,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:50:15,357 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 7 [2023-12-02 14:50:15,460 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 19 treesize of output 1 [2023-12-02 14:50:15,552 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 23 treesize of output 11 [2023-12-02 14:50:15,576 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 14:50:15,576 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:50:15,577 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:50:15,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2117058352] [2023-12-02 14:50:15,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2117058352] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:50:15,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:50:15,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-02 14:50:15,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463911541] [2023-12-02 14:50:15,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:50:15,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 14:50:15,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:50:15,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 14:50:15,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-12-02 14:50:15,578 INFO L87 Difference]: Start difference. First operand 117 states and 149 transitions. Second operand has 10 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:50:16,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:50:16,650 INFO L93 Difference]: Finished difference Result 142 states and 168 transitions. [2023-12-02 14:50:16,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 14:50:16,651 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-12-02 14:50:16,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:50:16,653 INFO L225 Difference]: With dead ends: 142 [2023-12-02 14:50:16,653 INFO L226 Difference]: Without dead ends: 142 [2023-12-02 14:50:16,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-12-02 14:50:16,653 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 57 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:50:16,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 352 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 14:50:16,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-12-02 14:50:16,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 124. [2023-12-02 14:50:16,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 79 states have (on average 1.759493670886076) internal successors, (139), 111 states have internal predecessors, (139), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 14:50:16,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 159 transitions. [2023-12-02 14:50:16,660 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 159 transitions. Word has length 22 [2023-12-02 14:50:16,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:50:16,660 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 159 transitions. [2023-12-02 14:50:16,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:50:16,661 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 159 transitions. [2023-12-02 14:50:16,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 14:50:16,661 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:50:16,661 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:50:16,665 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2023-12-02 14:50:16,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:16,862 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:50:16,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:50:16,862 INFO L85 PathProgramCache]: Analyzing trace with hash 612415884, now seen corresponding path program 1 times [2023-12-02 14:50:16,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:50:16,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706387442] [2023-12-02 14:50:16,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:16,863 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:16,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:50:16,864 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 14:50:16,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-12-02 14:50:16,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:50:16,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-02 14:50:16,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:50:16,986 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 14:50:17,136 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 19 treesize of output 1 [2023-12-02 14:50:17,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-02 14:50:17,275 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 21 treesize of output 9 [2023-12-02 14:50:17,314 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 14:50:17,314 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:50:17,314 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:50:17,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706387442] [2023-12-02 14:50:17,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706387442] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:50:17,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:50:17,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-02 14:50:17,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297431678] [2023-12-02 14:50:17,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:50:17,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 14:50:17,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:50:17,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 14:50:17,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-12-02 14:50:17,316 INFO L87 Difference]: Start difference. First operand 124 states and 159 transitions. Second operand has 10 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:50:18,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:50:18,689 INFO L93 Difference]: Finished difference Result 141 states and 167 transitions. [2023-12-02 14:50:18,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 14:50:18,690 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-12-02 14:50:18,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:50:18,692 INFO L225 Difference]: With dead ends: 141 [2023-12-02 14:50:18,692 INFO L226 Difference]: Without dead ends: 141 [2023-12-02 14:50:18,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-12-02 14:50:18,692 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 50 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:50:18,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 394 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-02 14:50:18,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-12-02 14:50:18,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 124. [2023-12-02 14:50:18,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 79 states have (on average 1.7468354430379747) internal successors, (138), 111 states have internal predecessors, (138), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 14:50:18,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 158 transitions. [2023-12-02 14:50:18,698 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 158 transitions. Word has length 22 [2023-12-02 14:50:18,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:50:18,698 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 158 transitions. [2023-12-02 14:50:18,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:50:18,699 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 158 transitions. [2023-12-02 14:50:18,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 14:50:18,699 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:50:18,699 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] [2023-12-02 14:50:18,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2023-12-02 14:50:18,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:18,900 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:50:18,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:50:18,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1276469576, now seen corresponding path program 1 times [2023-12-02 14:50:18,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:50:18,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1107966121] [2023-12-02 14:50:18,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:18,901 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:18,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:50:18,902 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 14:50:18,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-12-02 14:50:19,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:50:19,020 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 14:50:19,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:50:19,024 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 7 [2023-12-02 14:50:19,068 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base (_ BitVec 64))) (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) (_ bv0 1)))) is different from true [2023-12-02 14:50:19,093 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 14:50:19,094 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 21 treesize of output 20 [2023-12-02 14:50:19,115 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base (_ BitVec 64))) (= (store |c_old(#valid)| alloc_and_zero_~pi~0.base (_ bv1 1)) |c_#valid|)) is different from true [2023-12-02 14:50:19,134 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-02 14:50:19,134 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 1 case distinctions, treesize of input 14 treesize of output 20 [2023-12-02 14:50:19,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-12-02 14:50:19,150 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:50:19,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:50:19,420 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:50:19,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1107966121] [2023-12-02 14:50:19,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1107966121] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:50:19,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [850435859] [2023-12-02 14:50:19,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:19,420 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 14:50:19,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 14:50:19,421 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 14:50:19,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2023-12-02 14:50:19,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:50:19,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 14:50:19,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:50:19,637 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-02 14:50:19,637 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 1 case distinctions, treesize of input 14 treesize of output 20 [2023-12-02 14:50:19,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:50:19,650 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:50:19,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [850435859] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:50:19,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 14:50:19,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8, 6] total 9 [2023-12-02 14:50:19,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398566216] [2023-12-02 14:50:19,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:50:19,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 14:50:19,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:50:19,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 14:50:19,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=44, Unknown=2, NotChecked=26, Total=90 [2023-12-02 14:50:19,652 INFO L87 Difference]: Start difference. First operand 124 states and 158 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 14:50:19,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:50:19,903 INFO L93 Difference]: Finished difference Result 125 states and 157 transitions. [2023-12-02 14:50:19,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 14:50:19,904 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2023-12-02 14:50:19,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:50:19,904 INFO L225 Difference]: With dead ends: 125 [2023-12-02 14:50:19,905 INFO L226 Difference]: Without dead ends: 125 [2023-12-02 14:50:19,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 7 SemanticMatches, 8 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=44, Unknown=2, NotChecked=26, Total=90 [2023-12-02 14:50:19,905 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 7 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 14:50:19,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 165 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 97 Invalid, 0 Unknown, 112 Unchecked, 0.2s Time] [2023-12-02 14:50:19,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-12-02 14:50:19,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2023-12-02 14:50:19,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 79 states have (on average 1.7341772151898733) internal successors, (137), 111 states have internal predecessors, (137), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 14:50:19,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 157 transitions. [2023-12-02 14:50:19,910 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 157 transitions. Word has length 23 [2023-12-02 14:50:19,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:50:19,911 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 157 transitions. [2023-12-02 14:50:19,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 14:50:19,911 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 157 transitions. [2023-12-02 14:50:19,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 14:50:19,912 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:50:19,912 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] [2023-12-02 14:50:19,916 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2023-12-02 14:50:20,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2023-12-02 14:50:20,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 14:50:20,313 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:50:20,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:50:20,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1276469575, now seen corresponding path program 1 times [2023-12-02 14:50:20,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:50:20,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1320481236] [2023-12-02 14:50:20,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:20,314 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:20,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:50:20,315 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 14:50:20,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-12-02 14:50:20,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:50:20,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 14:50:20,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:50:20,453 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 7 [2023-12-02 14:50:20,460 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 14:50:20,582 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base (_ BitVec 64))) (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) (_ bv0 1)))) is different from true [2023-12-02 14:50:20,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:20,601 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 14:50:20,615 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 14:50:20,615 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 13 treesize of output 13 [2023-12-02 14:50:20,685 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base (_ BitVec 64))) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) (_ bv0 1)) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2023-12-02 14:50:20,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:20,708 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 14:50:20,721 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 14:50:20,721 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 13 treesize of output 13 [2023-12-02 14:50:20,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-12-02 14:50:20,723 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:50:23,148 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:50:23,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1320481236] [2023-12-02 14:50:23,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1320481236] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:50:23,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1908061009] [2023-12-02 14:50:23,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:23,149 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 14:50:23,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 14:50:23,150 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 14:50:23,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2023-12-02 14:50:23,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:50:23,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 14:50:23,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:50:23,355 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 7 [2023-12-02 14:50:23,361 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 14:50:23,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:23,435 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 14:50:23,446 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 14:50:23,447 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 13 treesize of output 13 [2023-12-02 14:50:23,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:23,528 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 14:50:23,538 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 14:50:23,538 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 13 treesize of output 13 [2023-12-02 14:50:23,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-12-02 14:50:23,540 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:50:23,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1908061009] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:50:23,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153893101] [2023-12-02 14:50:23,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:23,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:50:23,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:50:23,779 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:50:23,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-02 14:50:23,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:50:23,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 14:50:23,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:50:23,900 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 14:50:24,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:24,007 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 14:50:24,019 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 14:50:24,020 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 13 treesize of output 13 [2023-12-02 14:50:24,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:24,107 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 14:50:24,119 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 14:50:24,120 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 13 treesize of output 13 [2023-12-02 14:50:24,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-12-02 14:50:24,121 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:50:24,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153893101] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:50:24,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:50:24,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 10 [2023-12-02 14:50:24,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733726945] [2023-12-02 14:50:24,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:50:24,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 14:50:24,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:50:24,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 14:50:24,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=87, Unknown=3, NotChecked=38, Total=156 [2023-12-02 14:50:24,411 INFO L87 Difference]: Start difference. First operand 124 states and 157 transitions. Second operand has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 14:50:25,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:50:25,273 INFO L93 Difference]: Finished difference Result 127 states and 162 transitions. [2023-12-02 14:50:25,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 14:50:25,273 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2023-12-02 14:50:25,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:50:25,275 INFO L225 Difference]: With dead ends: 127 [2023-12-02 14:50:25,275 INFO L226 Difference]: Without dead ends: 127 [2023-12-02 14:50:25,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=38, Invalid=123, Unknown=3, NotChecked=46, Total=210 [2023-12-02 14:50:25,276 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 5 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 267 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 14:50:25,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 287 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 335 Invalid, 0 Unknown, 267 Unchecked, 0.7s Time] [2023-12-02 14:50:25,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-12-02 14:50:25,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2023-12-02 14:50:25,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 80 states have (on average 1.725) internal successors, (138), 112 states have internal predecessors, (138), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-12-02 14:50:25,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 160 transitions. [2023-12-02 14:50:25,282 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 160 transitions. Word has length 23 [2023-12-02 14:50:25,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:50:25,282 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 160 transitions. [2023-12-02 14:50:25,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 14:50:25,282 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 160 transitions. [2023-12-02 14:50:25,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 14:50:25,283 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:50:25,283 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] [2023-12-02 14:50:25,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2023-12-02 14:50:25,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-12-02 14:50:25,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-12-02 14:50:25,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:50:25,884 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:50:25,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:50:25,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1358917053, now seen corresponding path program 1 times [2023-12-02 14:50:25,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:50:25,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1802644582] [2023-12-02 14:50:25,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:25,885 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:25,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:50:25,886 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 14:50:25,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-12-02 14:50:26,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:50:26,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 14:50:26,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:50:26,026 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 7 [2023-12-02 14:50:26,078 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base (_ BitVec 64))) (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) (_ bv0 1)))) is different from true [2023-12-02 14:50:26,107 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 14:50:26,107 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 21 treesize of output 20 [2023-12-02 14:50:26,123 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base (_ BitVec 64))) (= (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (_ bv1 1)) |c_#valid|)) is different from true [2023-12-02 14:50:26,141 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-02 14:50:26,141 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 1 case distinctions, treesize of input 14 treesize of output 20 [2023-12-02 14:50:26,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2023-12-02 14:50:26,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:50:26,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 14:50:26,413 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:50:26,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1802644582] [2023-12-02 14:50:26,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1802644582] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 14:50:26,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:50:26,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 9 [2023-12-02 14:50:26,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099197047] [2023-12-02 14:50:26,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:50:26,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 14:50:26,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:50:26,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 14:50:26,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=44, Unknown=2, NotChecked=26, Total=90 [2023-12-02 14:50:26,415 INFO L87 Difference]: Start difference. First operand 126 states and 160 transitions. Second operand has 7 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 14:50:27,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:50:27,126 INFO L93 Difference]: Finished difference Result 125 states and 157 transitions. [2023-12-02 14:50:27,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 14:50:27,126 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2023-12-02 14:50:27,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:50:27,128 INFO L225 Difference]: With dead ends: 125 [2023-12-02 14:50:27,128 INFO L226 Difference]: Without dead ends: 125 [2023-12-02 14:50:27,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=68, Unknown=2, NotChecked=34, Total=132 [2023-12-02 14:50:27,128 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 28 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 14:50:27,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 249 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 14:50:27,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-12-02 14:50:27,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2023-12-02 14:50:27,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 80 states have (on average 1.6875) internal successors, (135), 110 states have internal predecessors, (135), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-12-02 14:50:27,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 157 transitions. [2023-12-02 14:50:27,133 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 157 transitions. Word has length 23 [2023-12-02 14:50:27,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:50:27,133 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 157 transitions. [2023-12-02 14:50:27,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 14:50:27,134 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 157 transitions. [2023-12-02 14:50:27,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 14:50:27,134 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:50:27,134 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] [2023-12-02 14:50:27,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2023-12-02 14:50:27,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:27,335 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:50:27,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:50:27,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1358917054, now seen corresponding path program 1 times [2023-12-02 14:50:27,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:50:27,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [37026177] [2023-12-02 14:50:27,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:27,336 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:27,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:50:27,336 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 14:50:27,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-12-02 14:50:27,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:50:27,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-02 14:50:27,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:50:27,506 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 14:50:27,511 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 7 [2023-12-02 14:50:27,726 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-12-02 14:50:27,726 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 27 [2023-12-02 14:50:27,734 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 14:50:27,871 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base (_ BitVec 64))) (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) (_ bv0 1)))) is different from true [2023-12-02 14:50:27,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:27,899 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 14 treesize of output 9 [2023-12-02 14:50:27,928 INFO L349 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2023-12-02 14:50:27,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2023-12-02 14:50:27,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-12-02 14:50:27,973 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:50:28,379 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:50:28,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [37026177] [2023-12-02 14:50:28,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [37026177] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:50:28,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [512841039] [2023-12-02 14:50:28,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:28,380 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 14:50:28,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 14:50:28,381 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 14:50:28,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2023-12-02 14:50:28,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:50:28,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 14:50:28,612 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:50:28,616 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 14:50:28,624 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 7 [2023-12-02 14:50:28,687 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base (_ BitVec 64))) (and (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= |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) (_ bv0 1)))) is different from true [2023-12-02 14:50:28,740 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 14:50:28,741 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 21 treesize of output 20 [2023-12-02 14:50:28,748 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 14:50:28,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:28,816 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 14:50:28,828 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 14:50:28,828 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 13 treesize of output 13 [2023-12-02 14:50:28,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-12-02 14:50:28,854 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:50:33,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [512841039] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:50:33,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740846114] [2023-12-02 14:50:33,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:33,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:50:33,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:50:33,228 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:50:33,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-02 14:50:33,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:50:33,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 14:50:33,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:50:33,340 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 14:50:33,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:33,471 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 14:50:33,502 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 14:50:33,503 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 21 treesize of output 20 [2023-12-02 14:50:33,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:50:33,575 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 14:50:33,588 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 14:50:33,589 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 13 treesize of output 13 [2023-12-02 14:50:33,609 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-12-02 14:50:33,610 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:50:33,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740846114] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:50:33,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:50:33,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 12 [2023-12-02 14:50:33,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328569595] [2023-12-02 14:50:33,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:50:33,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 14:50:33,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:50:33,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 14:50:33,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=126, Unknown=2, NotChecked=46, Total=210 [2023-12-02 14:50:33,909 INFO L87 Difference]: Start difference. First operand 124 states and 157 transitions. Second operand has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 14:50:36,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 14:50:39,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 14:50:40,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:50:40,455 INFO L93 Difference]: Finished difference Result 128 states and 153 transitions. [2023-12-02 14:50:40,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 14:50:40,456 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 23 [2023-12-02 14:50:40,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:50:40,457 INFO L225 Difference]: With dead ends: 128 [2023-12-02 14:50:40,457 INFO L226 Difference]: Without dead ends: 128 [2023-12-02 14:50:40,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=48, Invalid=168, Unknown=2, NotChecked=54, Total=272 [2023-12-02 14:50:40,458 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 52 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 19 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2023-12-02 14:50:40,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 279 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 415 Invalid, 2 Unknown, 230 Unchecked, 6.4s Time] [2023-12-02 14:50:40,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-12-02 14:50:40,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 121. [2023-12-02 14:50:40,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 79 states have (on average 1.6455696202531647) internal successors, (130), 108 states have internal predecessors, (130), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 14:50:40,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 150 transitions. [2023-12-02 14:50:40,462 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 150 transitions. Word has length 23 [2023-12-02 14:50:40,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:50:40,462 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 150 transitions. [2023-12-02 14:50:40,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 14:50:40,463 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 150 transitions. [2023-12-02 14:50:40,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 14:50:40,463 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:50:40,468 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:50:40,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2023-12-02 14:50:40,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-12-02 14:50:40,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2023-12-02 14:50:41,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:41,071 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:50:41,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:50:41,072 INFO L85 PathProgramCache]: Analyzing trace with hash 121178125, now seen corresponding path program 1 times [2023-12-02 14:50:41,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:50:41,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1886422844] [2023-12-02 14:50:41,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:41,072 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:41,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:50:41,073 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 14:50:41,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-12-02 14:50:41,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:50:41,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 14:50:41,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:50:41,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-12-02 14:50:41,540 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 20 treesize of output 8 [2023-12-02 14:50:41,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:50:41,588 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:50:41,588 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:50:41,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1886422844] [2023-12-02 14:50:41,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1886422844] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:50:41,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:50:41,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-12-02 14:50:41,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466266024] [2023-12-02 14:50:41,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:50:41,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 14:50:41,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:50:41,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 14:50:41,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-12-02 14:50:41,590 INFO L87 Difference]: Start difference. First operand 121 states and 150 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:50:42,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:50:42,877 INFO L93 Difference]: Finished difference Result 132 states and 153 transitions. [2023-12-02 14:50:42,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 14:50:42,878 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2023-12-02 14:50:42,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:50:42,879 INFO L225 Difference]: With dead ends: 132 [2023-12-02 14:50:42,880 INFO L226 Difference]: Without dead ends: 132 [2023-12-02 14:50:42,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-12-02 14:50:42,880 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 37 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:50:42,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 573 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-02 14:50:42,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-12-02 14:50:42,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 122. [2023-12-02 14:50:42,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 80 states have (on average 1.625) internal successors, (130), 109 states have internal predecessors, (130), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 14:50:42,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 150 transitions. [2023-12-02 14:50:42,884 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 150 transitions. Word has length 24 [2023-12-02 14:50:42,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:50:42,884 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 150 transitions. [2023-12-02 14:50:42,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:50:42,885 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 150 transitions. [2023-12-02 14:50:42,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 14:50:42,885 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:50:42,885 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:50:42,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2023-12-02 14:50:43,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:43,086 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:50:43,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:50:43,086 INFO L85 PathProgramCache]: Analyzing trace with hash 121236201, now seen corresponding path program 1 times [2023-12-02 14:50:43,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:50:43,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1628605160] [2023-12-02 14:50:43,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:50:43,087 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:50:43,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:50:43,088 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 14:50:43,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-12-02 14:50:43,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:50:43,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-02 14:50:43,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:50:43,220 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 7 [2023-12-02 14:50:43,401 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 14:50:43,418 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 14:50:43,522 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 14:50:43,522 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 13 treesize of output 13 [2023-12-02 14:50:43,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2023-12-02 14:50:43,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2023-12-02 14:50:44,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:50:44,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:50:46,689 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:50:46,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 5403 treesize of output 4967 [2023-12-02 14:50:49,380 INFO L349 Elim1Store]: treesize reduction 258, result has 45.6 percent of original size [2023-12-02 14:50:49,381 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 11 new quantified variables, introduced 45 case distinctions, treesize of input 8718 treesize of output 8003 [2023-12-02 14:51:23,691 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:51:23,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1628605160] [2023-12-02 14:51:23,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1628605160] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:51:23,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1345840115] [2023-12-02 14:51:23,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:51:23,691 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 14:51:23,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 14:51:23,692 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 14:51:23,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2023-12-02 14:51:23,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:51:23,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-02 14:51:23,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:51:23,952 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 7 [2023-12-02 14:51:24,684 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 14:51:24,701 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 14:51:24,916 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 14:51:24,917 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 13 treesize of output 13 [2023-12-02 14:51:25,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-12-02 14:51:25,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-12-02 14:51:26,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:51:26,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:51:27,948 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:51:27,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 2350 treesize of output 2124 [2023-12-02 14:51:30,723 INFO L349 Elim1Store]: treesize reduction 258, result has 45.9 percent of original size [2023-12-02 14:51:30,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 45 case distinctions, treesize of input 2688 treesize of output 2678 [2023-12-02 14:51:46,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1345840115] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:51:46,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601946166] [2023-12-02 14:51:46,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:51:46,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:51:46,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:51:46,558 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:51:46,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-02 14:51:46,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:51:46,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-02 14:51:46,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:51:46,866 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 14:51:46,882 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 14:51:46,946 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 14:51:46,946 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 13 treesize of output 13 [2023-12-02 14:51:47,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2023-12-02 14:51:47,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2023-12-02 14:51:48,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:51:48,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:51:50,022 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:51:50,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 2350 treesize of output 2124 [2023-12-02 14:51:52,508 INFO L349 Elim1Store]: treesize reduction 258, result has 45.6 percent of original size [2023-12-02 14:51:52,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 11 new quantified variables, introduced 45 case distinctions, treesize of input 4939 treesize of output 4738 [2023-12-02 14:52:42,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601946166] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:52:42,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:52:42,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 32 [2023-12-02 14:52:42,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759890087] [2023-12-02 14:52:42,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:52:42,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-02 14:52:42,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:52:42,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-02 14:52:42,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1358, Unknown=3, NotChecked=0, Total=1482 [2023-12-02 14:52:42,810 INFO L87 Difference]: Start difference. First operand 122 states and 150 transitions. Second operand has 32 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 14:52:47,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:52:47,249 INFO L93 Difference]: Finished difference Result 125 states and 154 transitions. [2023-12-02 14:52:47,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 14:52:47,251 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 24 [2023-12-02 14:52:47,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:52:47,252 INFO L225 Difference]: With dead ends: 125 [2023-12-02 14:52:47,252 INFO L226 Difference]: Without dead ends: 125 [2023-12-02 14:52:47,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=165, Invalid=1724, Unknown=3, NotChecked=0, Total=1892 [2023-12-02 14:52:47,254 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 27 mSDsluCounter, 1163 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 1228 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-12-02 14:52:47,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 1228 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-12-02 14:52:47,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-12-02 14:52:47,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2023-12-02 14:52:47,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 81 states have (on average 1.617283950617284) internal successors, (131), 110 states have internal predecessors, (131), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 14:52:47,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 151 transitions. [2023-12-02 14:52:47,260 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 151 transitions. Word has length 24 [2023-12-02 14:52:47,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:52:47,260 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 151 transitions. [2023-12-02 14:52:47,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 14:52:47,260 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 151 transitions. [2023-12-02 14:52:47,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 14:52:47,261 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:52:47,261 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:52:47,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-12-02 14:52:47,464 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Ended with exit code 0 [2023-12-02 14:52:47,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2023-12-02 14:52:47,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 14:52:47,862 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:52:47,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:52:47,862 INFO L85 PathProgramCache]: Analyzing trace with hash -799220620, now seen corresponding path program 1 times [2023-12-02 14:52:47,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:52:47,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1808422660] [2023-12-02 14:52:47,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:52:47,863 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:52:47,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:52:47,863 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 14:52:47,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2023-12-02 14:52:47,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:52:47,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 14:52:47,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:52:48,002 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 7 [2023-12-02 14:52:48,062 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 14:52:48,100 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 19 treesize of output 11 [2023-12-02 14:52:48,188 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base (_ BitVec 64))) (= (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (_ bv1 1)) |c_#valid|)) is different from true [2023-12-02 14:52:48,226 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-02 14:52:48,227 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 1 case distinctions, treesize of input 14 treesize of output 20 [2023-12-02 14:52:48,267 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 14:52:48,267 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:52:48,609 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 14:52:48,609 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:52:48,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1808422660] [2023-12-02 14:52:48,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1808422660] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:52:48,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [817961496] [2023-12-02 14:52:48,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:52:48,610 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 14:52:48,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 14:52:48,611 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 14:52:48,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2023-12-02 14:52:48,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:52:48,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 14:52:48,864 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:52:48,869 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 7 [2023-12-02 14:52:48,890 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 14:52:48,908 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 19 treesize of output 11 [2023-12-02 14:52:48,972 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-02 14:52:48,973 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 1 case distinctions, treesize of input 14 treesize of output 20 [2023-12-02 14:52:49,012 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 14:52:49,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:52:49,343 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 14:52:49,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [817961496] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:52:49,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157411638] [2023-12-02 14:52:49,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:52:49,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:52:49,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:52:49,345 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:52:49,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-12-02 14:52:49,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:52:49,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 14:52:49,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:52:49,478 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 7 [2023-12-02 14:52:49,502 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 14:52:49,508 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 19 treesize of output 11 [2023-12-02 14:52:49,544 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base (_ BitVec 64))) (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) (_ bv0 1)))) is different from true [2023-12-02 14:52:49,608 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 14:52:49,609 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 21 treesize of output 20 [2023-12-02 14:52:49,614 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 14:52:49,614 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:52:49,939 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 14:52:49,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157411638] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:52:49,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 14:52:49,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8, 7, 8, 7] total 10 [2023-12-02 14:52:49,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828760685] [2023-12-02 14:52:49,940 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 14:52:49,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 14:52:49,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:52:49,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 14:52:49,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=58, Unknown=2, NotChecked=30, Total=110 [2023-12-02 14:52:49,942 INFO L87 Difference]: Start difference. First operand 123 states and 151 transitions. Second operand has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 14:52:51,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:52:51,513 INFO L93 Difference]: Finished difference Result 126 states and 156 transitions. [2023-12-02 14:52:51,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 14:52:51,514 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 27 [2023-12-02 14:52:51,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:52:51,516 INFO L225 Difference]: With dead ends: 126 [2023-12-02 14:52:51,516 INFO L226 Difference]: Without dead ends: 126 [2023-12-02 14:52:51,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 137 SyntacticMatches, 10 SemanticMatches, 13 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=38, Invalid=124, Unknown=2, NotChecked=46, Total=210 [2023-12-02 14:52:51,517 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 14 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-02 14:52:51,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 382 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 338 Invalid, 0 Unknown, 212 Unchecked, 1.4s Time] [2023-12-02 14:52:51,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-12-02 14:52:51,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 122. [2023-12-02 14:52:51,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 81 states have (on average 1.6049382716049383) internal successors, (130), 109 states have internal predecessors, (130), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 14:52:51,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 150 transitions. [2023-12-02 14:52:51,523 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 150 transitions. Word has length 27 [2023-12-02 14:52:51,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:52:51,524 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 150 transitions. [2023-12-02 14:52:51,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 14:52:51,524 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 150 transitions. [2023-12-02 14:52:51,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 14:52:51,525 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:52:51,525 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:52:51,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-12-02 14:52:51,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Ended with exit code 0 [2023-12-02 14:52:51,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2023-12-02 14:52:52,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 14:52:52,126 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:52:52,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:52:52,126 INFO L85 PathProgramCache]: Analyzing trace with hash -799220619, now seen corresponding path program 1 times [2023-12-02 14:52:52,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:52:52,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [404528116] [2023-12-02 14:52:52,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:52:52,127 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:52:52,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:52:52,127 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 14:52:52,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2023-12-02 14:52:52,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:52:52,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-02 14:52:52,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:52:52,294 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 7 [2023-12-02 14:52:52,307 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 14:52:52,439 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 14:52:52,460 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 14:52:52,521 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 28 treesize of output 16 [2023-12-02 14:52:52,689 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base (_ BitVec 64))) (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) (_ bv0 1)))) is different from true [2023-12-02 14:52:52,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:52:52,718 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 14:52:52,741 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 14:52:52,741 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 13 treesize of output 13 [2023-12-02 14:52:52,797 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 14:52:52,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:52:53,409 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:52:53,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [404528116] [2023-12-02 14:52:53,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [404528116] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:52:53,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1770785124] [2023-12-02 14:52:53,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:52:53,409 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 14:52:53,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 14:52:53,410 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 14:52:53,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2023-12-02 14:52:53,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:52:53,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-02 14:52:53,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:52:53,654 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 14:52:53,664 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 7 [2023-12-02 14:52:53,726 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 14:52:53,747 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 14:52:53,765 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 28 treesize of output 16 [2023-12-02 14:52:53,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:52:53,876 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 14:52:53,904 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 14:52:53,904 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 13 treesize of output 13 [2023-12-02 14:52:53,905 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 14:52:53,905 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:52:56,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1770785124] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:52:56,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756972076] [2023-12-02 14:52:56,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:52:56,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:52:56,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:52:56,304 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:52:56,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-12-02 14:52:56,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:52:56,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-02 14:52:56,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:52:56,438 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 7 [2023-12-02 14:52:56,447 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 14:52:56,508 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 14:52:56,521 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 14:52:56,547 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 28 treesize of output 16 [2023-12-02 14:52:56,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:52:56,658 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 14:52:56,683 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 14:52:56,683 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 13 treesize of output 13 [2023-12-02 14:52:56,685 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 14:52:56,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:52:59,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756972076] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:52:59,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:52:59,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2023-12-02 14:52:59,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433886069] [2023-12-02 14:52:59,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:52:59,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 14:52:59,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:52:59,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 14:52:59,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=88, Unknown=1, NotChecked=18, Total=132 [2023-12-02 14:52:59,239 INFO L87 Difference]: Start difference. First operand 122 states and 150 transitions. Second operand has 10 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 14:53:01,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:53:01,259 INFO L93 Difference]: Finished difference Result 121 states and 150 transitions. [2023-12-02 14:53:01,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 14:53:01,261 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2023-12-02 14:53:01,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:53:01,262 INFO L225 Difference]: With dead ends: 121 [2023-12-02 14:53:01,262 INFO L226 Difference]: Without dead ends: 121 [2023-12-02 14:53:01,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=45, Invalid=168, Unknown=1, NotChecked=26, Total=240 [2023-12-02 14:53:01,263 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 6 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-12-02 14:53:01,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 379 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 409 Invalid, 0 Unknown, 101 Unchecked, 1.7s Time] [2023-12-02 14:53:01,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-12-02 14:53:01,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 117. [2023-12-02 14:53:01,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 79 states have (on average 1.5949367088607596) internal successors, (126), 105 states have internal predecessors, (126), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 14:53:01,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 144 transitions. [2023-12-02 14:53:01,268 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 144 transitions. Word has length 27 [2023-12-02 14:53:01,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:53:01,268 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 144 transitions. [2023-12-02 14:53:01,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 14:53:01,269 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 144 transitions. [2023-12-02 14:53:01,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 14:53:01,269 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:53:01,269 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:53:01,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Ended with exit code 0 [2023-12-02 14:53:01,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-12-02 14:53:01,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2023-12-02 14:53:01,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 14:53:01,870 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:53:01,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:53:01,871 INFO L85 PathProgramCache]: Analyzing trace with hash 543906283, now seen corresponding path program 1 times [2023-12-02 14:53:01,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:53:01,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1326558679] [2023-12-02 14:53:01,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:53:01,871 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:53:01,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:53:01,872 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 14:53:01,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2023-12-02 14:53:02,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:53:02,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-02 14:53:02,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:53:02,034 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 7 [2023-12-02 14:53:02,063 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 14:53:02,074 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 14:53:02,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-02 14:53:02,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-02 14:53:02,530 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base (_ BitVec 64))) (and (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| alloc_and_zero_internal_~pi~1.base (select |c_#memory_$Pointer$.offset| alloc_and_zero_internal_~pi~1.base))) (= (store |c_old(#memory_$Pointer$.base)| alloc_and_zero_internal_~pi~1.base (select |c_#memory_$Pointer$.base| alloc_and_zero_internal_~pi~1.base)) |c_#memory_$Pointer$.base|) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) (_ bv0 1)))) is different from true [2023-12-02 14:53:02,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:53:02,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 14:53:02,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:53:02,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 14:53:02,598 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 14:53:02,599 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 13 treesize of output 13 [2023-12-02 14:53:02,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-02 14:53:02,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-02 14:53:03,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 14:53:03,190 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:53:06,559 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:53:06,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1326558679] [2023-12-02 14:53:06,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1326558679] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:53:06,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [347969541] [2023-12-02 14:53:06,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:53:06,560 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 14:53:06,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 14:53:06,561 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 14:53:06,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2023-12-02 14:53:06,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:53:06,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 51 conjunts are in the unsatisfiable core [2023-12-02 14:53:06,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:53:06,879 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 7 [2023-12-02 14:53:06,906 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 14:53:06,930 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 14:53:06,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-02 14:53:06,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-02 14:53:07,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:53:07,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 14:53:07,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:53:07,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 14:53:07,407 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 14:53:07,407 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 13 treesize of output 13 [2023-12-02 14:53:07,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-02 14:53:07,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-02 14:53:08,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 14:53:08,295 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:53:09,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [347969541] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:53:09,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296999982] [2023-12-02 14:53:09,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:53:09,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:53:09,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:53:09,283 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:53:09,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-12-02 14:53:09,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:53:09,413 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 43 conjunts are in the unsatisfiable core [2023-12-02 14:53:09,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:53:09,422 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 14:53:09,438 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 14:53:09,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 27 treesize of output 11 [2023-12-02 14:53:09,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-12-02 14:53:10,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:53:10,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 14:53:10,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:53:10,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 14:53:10,228 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 14:53:10,228 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 13 treesize of output 13 [2023-12-02 14:53:10,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 27 treesize of output 11 [2023-12-02 14:53:10,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-12-02 14:53:10,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 14:53:10,645 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:53:11,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296999982] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:53:11,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:53:11,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 13] total 27 [2023-12-02 14:53:11,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616524100] [2023-12-02 14:53:11,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:53:11,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-02 14:53:11,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:53:11,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-02 14:53:11,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=663, Unknown=3, NotChecked=52, Total=812 [2023-12-02 14:53:11,778 INFO L87 Difference]: Start difference. First operand 117 states and 144 transitions. Second operand has 27 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 23 states have internal predecessors, (54), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 14:53:14,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:53:14,447 INFO L93 Difference]: Finished difference Result 121 states and 150 transitions. [2023-12-02 14:53:14,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 14:53:14,449 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 23 states have internal predecessors, (54), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 26 [2023-12-02 14:53:14,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:53:14,449 INFO L225 Difference]: With dead ends: 121 [2023-12-02 14:53:14,450 INFO L226 Difference]: Without dead ends: 121 [2023-12-02 14:53:14,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 93 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=113, Invalid=758, Unknown=3, NotChecked=56, Total=930 [2023-12-02 14:53:14,450 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 16 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-12-02 14:53:14,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 739 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 590 Invalid, 0 Unknown, 107 Unchecked, 2.4s Time] [2023-12-02 14:53:14,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-12-02 14:53:14,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2023-12-02 14:53:14,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 81 states have (on average 1.5802469135802468) internal successors, (128), 107 states have internal predecessors, (128), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 14:53:14,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 146 transitions. [2023-12-02 14:53:14,454 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 146 transitions. Word has length 26 [2023-12-02 14:53:14,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:53:14,454 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 146 transitions. [2023-12-02 14:53:14,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 23 states have internal predecessors, (54), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 14:53:14,455 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 146 transitions. [2023-12-02 14:53:14,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 14:53:14,455 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:53:14,455 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:53:14,459 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Ended with exit code 0 [2023-12-02 14:53:14,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (39)] Ended with exit code 0 [2023-12-02 14:53:14,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-12-02 14:53:15,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:53:15,056 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:53:15,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:53:15,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1292102199, now seen corresponding path program 1 times [2023-12-02 14:53:15,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:53:15,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1304980970] [2023-12-02 14:53:15,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:53:15,057 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:53:15,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:53:15,058 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 14:53:15,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2023-12-02 14:53:15,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:53:15,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 14:53:15,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:53:15,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:53:15,343 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:53:15,343 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:53:15,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1304980970] [2023-12-02 14:53:15,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1304980970] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:53:15,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:53:15,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 14:53:15,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249683275] [2023-12-02 14:53:15,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:53:15,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:53:15,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:53:15,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:53:15,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:53:15,345 INFO L87 Difference]: Start difference. First operand 119 states and 146 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:53:16,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:53:16,369 INFO L93 Difference]: Finished difference Result 173 states and 200 transitions. [2023-12-02 14:53:16,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 14:53:16,370 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2023-12-02 14:53:16,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:53:16,371 INFO L225 Difference]: With dead ends: 173 [2023-12-02 14:53:16,371 INFO L226 Difference]: Without dead ends: 173 [2023-12-02 14:53:16,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-02 14:53:16,372 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 90 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:53:16,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 239 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 14:53:16,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-12-02 14:53:16,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 130. [2023-12-02 14:53:16,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 93 states have (on average 1.6236559139784945) internal successors, (151), 118 states have internal predecessors, (151), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 14:53:16,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 169 transitions. [2023-12-02 14:53:16,377 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 169 transitions. Word has length 28 [2023-12-02 14:53:16,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:53:16,377 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 169 transitions. [2023-12-02 14:53:16,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:53:16,378 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 169 transitions. [2023-12-02 14:53:16,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 14:53:16,378 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:53:16,378 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:53:16,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2023-12-02 14:53:16,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:53:16,579 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:53:16,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:53:16,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1292102198, now seen corresponding path program 1 times [2023-12-02 14:53:16,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:53:16,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [969313895] [2023-12-02 14:53:16,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:53:16,580 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:53:16,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:53:16,580 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 14:53:16,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2023-12-02 14:53:16,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:53:16,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 14:53:16,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:53:17,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:53:17,167 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:53:17,167 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:53:17,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [969313895] [2023-12-02 14:53:17,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [969313895] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:53:17,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:53:17,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 14:53:17,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790395569] [2023-12-02 14:53:17,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:53:17,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 14:53:17,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:53:17,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 14:53:17,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-02 14:53:17,169 INFO L87 Difference]: Start difference. First operand 130 states and 169 transitions. Second operand has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:53:18,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:53:18,913 INFO L93 Difference]: Finished difference Result 198 states and 242 transitions. [2023-12-02 14:53:18,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 14:53:18,914 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2023-12-02 14:53:18,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:53:18,916 INFO L225 Difference]: With dead ends: 198 [2023-12-02 14:53:18,916 INFO L226 Difference]: Without dead ends: 198 [2023-12-02 14:53:18,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-12-02 14:53:18,916 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 94 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-02 14:53:18,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 384 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-12-02 14:53:18,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2023-12-02 14:53:18,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 147. [2023-12-02 14:53:18,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 110 states have (on average 1.6636363636363636) internal successors, (183), 135 states have internal predecessors, (183), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 14:53:18,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 201 transitions. [2023-12-02 14:53:18,921 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 201 transitions. Word has length 28 [2023-12-02 14:53:18,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:53:18,921 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 201 transitions. [2023-12-02 14:53:18,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:53:18,921 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 201 transitions. [2023-12-02 14:53:18,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 14:53:18,922 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:53:18,922 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:53:18,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2023-12-02 14:53:19,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:53:19,122 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:53:19,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:53:19,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1400463065, now seen corresponding path program 1 times [2023-12-02 14:53:19,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:53:19,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1739838085] [2023-12-02 14:53:19,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:53:19,123 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:53:19,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:53:19,124 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 14:53:19,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2023-12-02 14:53:19,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:53:19,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 14:53:19,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:53:19,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:53:19,473 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:53:19,473 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:53:19,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1739838085] [2023-12-02 14:53:19,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1739838085] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:53:19,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:53:19,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 14:53:19,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694441375] [2023-12-02 14:53:19,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:53:19,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 14:53:19,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:53:19,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 14:53:19,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 14:53:19,475 INFO L87 Difference]: Start difference. First operand 147 states and 201 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:53:20,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:53:20,266 INFO L93 Difference]: Finished difference Result 172 states and 229 transitions. [2023-12-02 14:53:20,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 14:53:20,266 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2023-12-02 14:53:20,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:53:20,268 INFO L225 Difference]: With dead ends: 172 [2023-12-02 14:53:20,268 INFO L226 Difference]: Without dead ends: 172 [2023-12-02 14:53:20,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-02 14:53:20,269 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 97 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 14:53:20,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 385 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 14:53:20,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-12-02 14:53:20,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 148. [2023-12-02 14:53:20,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 111 states have (on average 1.6396396396396395) internal successors, (182), 136 states have internal predecessors, (182), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 14:53:20,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 200 transitions. [2023-12-02 14:53:20,274 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 200 transitions. Word has length 29 [2023-12-02 14:53:20,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:53:20,275 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 200 transitions. [2023-12-02 14:53:20,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:53:20,275 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 200 transitions. [2023-12-02 14:53:20,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 14:53:20,275 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:53:20,276 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, 1, 1, 1] [2023-12-02 14:53:20,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Ended with exit code 0 [2023-12-02 14:53:20,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:53:20,476 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:53:20,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:53:20,476 INFO L85 PathProgramCache]: Analyzing trace with hash 906147695, now seen corresponding path program 1 times [2023-12-02 14:53:20,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:53:20,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [796288448] [2023-12-02 14:53:20,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:53:20,477 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:53:20,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:53:20,478 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 14:53:20,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2023-12-02 14:53:20,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:53:20,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 14:53:20,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:53:20,904 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 19 treesize of output 1 [2023-12-02 14:53:21,012 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 23 treesize of output 11 [2023-12-02 14:53:21,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 14:53:21,056 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:53:21,114 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 38 treesize of output 32 [2023-12-02 14:53:21,445 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:53:21,445 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 40 treesize of output 64 [2023-12-02 14:53:21,588 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 14:53:21,588 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:53:21,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [796288448] [2023-12-02 14:53:21,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [796288448] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:53:21,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [772857927] [2023-12-02 14:53:21,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:53:21,589 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 14:53:21,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 14:53:21,590 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 14:53:21,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2023-12-02 14:53:21,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:53:21,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 14:53:21,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:53:22,650 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 14:53:22,869 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 19 treesize of output 11 [2023-12-02 14:53:22,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 14:53:22,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:53:22,936 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 38 treesize of output 32 [2023-12-02 14:53:23,376 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:53:23,376 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 40 treesize of output 64 [2023-12-02 14:53:23,691 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 14:53:23,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [772857927] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:53:23,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428152403] [2023-12-02 14:53:23,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:53:23,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:53:23,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:53:23,693 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:53:23,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-12-02 14:53:23,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:53:23,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-02 14:53:23,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:53:24,092 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 14:53:24,156 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 19 treesize of output 11 [2023-12-02 14:53:24,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 14:53:24,166 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:53:24,219 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 38 treesize of output 32 [2023-12-02 14:53:24,491 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:53:24,491 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 40 treesize of output 64 [2023-12-02 14:53:24,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 14:53:24,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428152403] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:53:24,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 14:53:24,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 11, 8, 10, 7] total 18 [2023-12-02 14:53:24,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517231618] [2023-12-02 14:53:24,701 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 14:53:24,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 14:53:24,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:53:24,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 14:53:24,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-12-02 14:53:24,703 INFO L87 Difference]: Start difference. First operand 148 states and 200 transitions. Second operand has 19 states, 17 states have (on average 2.823529411764706) internal successors, (48), 18 states have internal predecessors, (48), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 14:53:27,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:53:27,218 INFO L93 Difference]: Finished difference Result 199 states and 258 transitions. [2023-12-02 14:53:27,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 14:53:27,219 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.823529411764706) internal successors, (48), 18 states have internal predecessors, (48), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 30 [2023-12-02 14:53:27,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:53:27,221 INFO L225 Difference]: With dead ends: 199 [2023-12-02 14:53:27,221 INFO L226 Difference]: Without dead ends: 199 [2023-12-02 14:53:27,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 155 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2023-12-02 14:53:27,222 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 155 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:53:27,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 682 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-12-02 14:53:27,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2023-12-02 14:53:27,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 161. [2023-12-02 14:53:27,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 123 states have (on average 1.6016260162601625) internal successors, (197), 148 states have internal predecessors, (197), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 14:53:27,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 217 transitions. [2023-12-02 14:53:27,233 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 217 transitions. Word has length 30 [2023-12-02 14:53:27,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:53:27,234 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 217 transitions. [2023-12-02 14:53:27,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.823529411764706) internal successors, (48), 18 states have internal predecessors, (48), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 14:53:27,234 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 217 transitions. [2023-12-02 14:53:27,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 14:53:27,235 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:53:27,235 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, 1, 1, 1] [2023-12-02 14:53:27,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Ended with exit code 0 [2023-12-02 14:53:27,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 0 [2023-12-02 14:53:27,641 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-12-02 14:53:27,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:53:27,836 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:53:27,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:53:27,836 INFO L85 PathProgramCache]: Analyzing trace with hash 906147696, now seen corresponding path program 1 times [2023-12-02 14:53:27,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:53:27,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1169793436] [2023-12-02 14:53:27,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:53:27,837 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:53:27,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:53:27,838 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 14:53:27,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2023-12-02 14:53:27,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:53:27,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 14:53:27,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:53:28,488 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 19 treesize of output 1 [2023-12-02 14:53:28,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-02 14:53:28,714 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 21 treesize of output 9 [2023-12-02 14:53:28,798 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 14:53:28,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:53:29,770 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 40 treesize of output 28 [2023-12-02 14:53:29,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:53:29,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:53:29,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:53:29,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:53:30,455 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:53:30,455 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 28 treesize of output 32 [2023-12-02 14:53:32,008 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 14:53:32,009 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:53:32,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1169793436] [2023-12-02 14:53:32,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1169793436] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:53:32,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1399451619] [2023-12-02 14:53:32,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:53:32,009 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 14:53:32,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 14:53:32,010 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 14:53:32,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2023-12-02 14:53:32,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:53:32,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-02 14:53:32,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:53:33,762 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 14:53:33,769 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 14:53:34,203 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 14:53:34,230 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 14:53:34,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:53:34,499 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 40 treesize of output 28 [2023-12-02 14:53:34,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:53:34,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:53:34,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:53:34,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:53:34,723 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:53:34,723 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 28 treesize of output 32 [2023-12-02 14:53:35,442 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 14:53:35,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1399451619] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:53:35,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784535316] [2023-12-02 14:53:35,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:53:35,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:53:35,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:53:35,444 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:53:35,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-12-02 14:53:35,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:53:35,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-02 14:53:35,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:53:35,962 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 14:53:35,969 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 14:53:36,079 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 14:53:36,105 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 14:53:36,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:53:36,363 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 40 treesize of output 28 [2023-12-02 14:53:36,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:53:36,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:53:36,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:53:36,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:53:36,685 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:53:36,686 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 28 treesize of output 32 [2023-12-02 14:53:37,267 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 14:53:37,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784535316] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:53:37,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 14:53:37,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 13, 10, 13, 10] total 27 [2023-12-02 14:53:37,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656942415] [2023-12-02 14:53:37,268 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 14:53:37,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-02 14:53:37,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:53:37,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-02 14:53:37,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2023-12-02 14:53:37,270 INFO L87 Difference]: Start difference. First operand 161 states and 217 transitions. Second operand has 28 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 24 states have internal predecessors, (62), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-02 14:53:43,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:53:43,680 INFO L93 Difference]: Finished difference Result 177 states and 232 transitions. [2023-12-02 14:53:43,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 14:53:43,682 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 24 states have internal predecessors, (62), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 30 [2023-12-02 14:53:43,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:53:43,683 INFO L225 Difference]: With dead ends: 177 [2023-12-02 14:53:43,683 INFO L226 Difference]: Without dead ends: 177 [2023-12-02 14:53:43,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 14:53:43,684 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 78 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 1135 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-12-02 14:53:43,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 1135 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2023-12-02 14:53:43,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-12-02 14:53:43,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 161. [2023-12-02 14:53:43,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 123 states have (on average 1.5934959349593496) internal successors, (196), 148 states have internal predecessors, (196), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 14:53:43,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 216 transitions. [2023-12-02 14:53:43,689 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 216 transitions. Word has length 30 [2023-12-02 14:53:43,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:53:43,690 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 216 transitions. [2023-12-02 14:53:43,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 24 states have internal predecessors, (62), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-02 14:53:43,690 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 216 transitions. [2023-12-02 14:53:43,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 14:53:43,690 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:53:43,690 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1] [2023-12-02 14:53:43,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Ended with exit code 0 [2023-12-02 14:53:43,894 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (48)] Ended with exit code 0 [2023-12-02 14:53:44,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-12-02 14:53:44,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:53:44,291 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:53:44,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:53:44,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1114051057, now seen corresponding path program 1 times [2023-12-02 14:53:44,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:53:44,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1736373415] [2023-12-02 14:53:44,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:53:44,292 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:53:44,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:53:44,293 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 14:53:44,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2023-12-02 14:53:44,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:53:44,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 14:53:44,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:53:44,518 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 7 [2023-12-02 14:53:44,589 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 14:53:44,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:53:44,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-12-02 14:53:44,930 INFO L349 Elim1Store]: treesize reduction 70, result has 30.7 percent of original size [2023-12-02 14:53:44,931 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 5 case distinctions, treesize of input 30 treesize of output 51 [2023-12-02 14:53:45,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 27 treesize of output 15 [2023-12-02 14:53:45,294 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 14:53:45,294 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:53:45,294 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:53:45,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1736373415] [2023-12-02 14:53:45,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1736373415] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:53:45,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:53:45,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-12-02 14:53:45,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156889817] [2023-12-02 14:53:45,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:53:45,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 14:53:45,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:53:45,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 14:53:45,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-12-02 14:53:45,295 INFO L87 Difference]: Start difference. First operand 161 states and 216 transitions. Second operand has 11 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 14:53:47,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 14:53:49,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:53:49,293 INFO L93 Difference]: Finished difference Result 177 states and 239 transitions. [2023-12-02 14:53:49,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 14:53:49,294 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-12-02 14:53:49,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:53:49,296 INFO L225 Difference]: With dead ends: 177 [2023-12-02 14:53:49,296 INFO L226 Difference]: Without dead ends: 177 [2023-12-02 14:53:49,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-12-02 14:53:49,297 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 16 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-12-02 14:53:49,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 397 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 375 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2023-12-02 14:53:49,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-12-02 14:53:49,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 169. [2023-12-02 14:53:49,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 131 states have (on average 1.5954198473282444) internal successors, (209), 156 states have internal predecessors, (209), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 14:53:49,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 229 transitions. [2023-12-02 14:53:49,304 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 229 transitions. Word has length 32 [2023-12-02 14:53:49,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:53:49,304 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 229 transitions. [2023-12-02 14:53:49,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 14:53:49,304 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 229 transitions. [2023-12-02 14:53:49,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 14:53:49,305 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:53:49,305 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1] [2023-12-02 14:53:49,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Ended with exit code 0 [2023-12-02 14:53:49,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:53:49,506 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:53:49,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:53:49,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1114051056, now seen corresponding path program 1 times [2023-12-02 14:53:49,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:53:49,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [332751209] [2023-12-02 14:53:49,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:53:49,507 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:53:49,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:53:49,508 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 14:53:49,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2023-12-02 14:53:49,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:53:49,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-02 14:53:49,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:53:49,779 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 14:53:49,790 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 7 [2023-12-02 14:53:49,950 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 14:53:49,963 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 14:53:50,233 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base (_ BitVec 64))) (and (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| alloc_and_zero_internal_~pi~1.base (select |c_#memory_$Pointer$.offset| alloc_and_zero_internal_~pi~1.base))) (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (store |c_old(#memory_$Pointer$.base)| alloc_and_zero_internal_~pi~1.base (select |c_#memory_$Pointer$.base| alloc_and_zero_internal_~pi~1.base)) |c_#memory_$Pointer$.base|) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) (_ bv0 1)))) is different from true [2023-12-02 14:53:50,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:53:50,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 22 [2023-12-02 14:53:50,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:53:50,269 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 18 treesize of output 13 [2023-12-02 14:53:50,350 INFO L349 Elim1Store]: treesize reduction 26, result has 33.3 percent of original size [2023-12-02 14:53:50,350 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 24 treesize of output 26 [2023-12-02 14:53:50,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 11 [2023-12-02 14:53:50,473 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 14:53:50,532 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 14:53:50,532 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:53:50,532 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:53:50,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [332751209] [2023-12-02 14:53:50,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [332751209] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:53:50,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:53:50,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-12-02 14:53:50,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087556487] [2023-12-02 14:53:50,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:53:50,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 14:53:50,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:53:50,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 14:53:50,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=73, Unknown=1, NotChecked=16, Total=110 [2023-12-02 14:53:50,534 INFO L87 Difference]: Start difference. First operand 169 states and 229 transitions. Second operand has 11 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 14:53:52,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:53:52,203 INFO L93 Difference]: Finished difference Result 172 states and 231 transitions. [2023-12-02 14:53:52,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 14:53:52,204 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-12-02 14:53:52,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:53:52,205 INFO L225 Difference]: With dead ends: 172 [2023-12-02 14:53:52,205 INFO L226 Difference]: Without dead ends: 172 [2023-12-02 14:53:52,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=107, Unknown=1, NotChecked=20, Total=156 [2023-12-02 14:53:52,206 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 6 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-02 14:53:52,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 327 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 338 Invalid, 0 Unknown, 136 Unchecked, 1.5s Time] [2023-12-02 14:53:52,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-12-02 14:53:52,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 169. [2023-12-02 14:53:52,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 131 states have (on average 1.5801526717557253) internal successors, (207), 156 states have internal predecessors, (207), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 14:53:52,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 227 transitions. [2023-12-02 14:53:52,212 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 227 transitions. Word has length 32 [2023-12-02 14:53:52,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:53:52,212 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 227 transitions. [2023-12-02 14:53:52,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 14:53:52,212 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 227 transitions. [2023-12-02 14:53:52,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 14:53:52,213 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:53:52,213 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:53:52,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2023-12-02 14:53:52,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:53:52,413 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:53:52,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:53:52,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1517497877, now seen corresponding path program 1 times [2023-12-02 14:53:52,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:53:52,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1117814648] [2023-12-02 14:53:52,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:53:52,414 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:53:52,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:53:52,415 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 14:53:52,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2023-12-02 14:53:52,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:53:52,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 14:53:52,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:53:52,613 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 7 [2023-12-02 14:53:52,833 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 19 treesize of output 1 [2023-12-02 14:53:53,104 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 23 treesize of output 11 [2023-12-02 14:53:53,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:53:53,162 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:53:53,163 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:53:53,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1117814648] [2023-12-02 14:53:53,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1117814648] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:53:53,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:53:53,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-12-02 14:53:53,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738073961] [2023-12-02 14:53:53,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:53:53,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 14:53:53,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:53:53,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 14:53:53,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-12-02 14:53:53,164 INFO L87 Difference]: Start difference. First operand 169 states and 227 transitions. Second operand has 11 states, 8 states have (on average 3.375) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:53:55,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:53:55,454 INFO L93 Difference]: Finished difference Result 190 states and 244 transitions. [2023-12-02 14:53:55,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 14:53:55,455 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 3.375) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2023-12-02 14:53:55,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:53:55,456 INFO L225 Difference]: With dead ends: 190 [2023-12-02 14:53:55,456 INFO L226 Difference]: Without dead ends: 190 [2023-12-02 14:53:55,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2023-12-02 14:53:55,457 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 76 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:53:55,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 369 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-02 14:53:55,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-12-02 14:53:55,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 174. [2023-12-02 14:53:55,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 137 states have (on average 1.5547445255474452) internal successors, (213), 161 states have internal predecessors, (213), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 14:53:55,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 233 transitions. [2023-12-02 14:53:55,461 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 233 transitions. Word has length 31 [2023-12-02 14:53:55,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:53:55,461 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 233 transitions. [2023-12-02 14:53:55,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 3.375) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:53:55,462 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 233 transitions. [2023-12-02 14:53:55,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 14:53:55,462 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:53:55,462 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:53:55,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Ended with exit code 0 [2023-12-02 14:53:55,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:53:55,663 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:53:55,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:53:55,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1517497876, now seen corresponding path program 1 times [2023-12-02 14:53:55,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:53:55,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1648876691] [2023-12-02 14:53:55,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:53:55,663 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:53:55,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:53:55,664 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 14:53:55,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2023-12-02 14:53:55,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:53:55,824 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-02 14:53:55,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:53:55,861 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 14:53:56,161 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 19 treesize of output 1 [2023-12-02 14:53:56,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-02 14:53:56,568 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 21 treesize of output 9 [2023-12-02 14:53:56,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:53:56,660 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:53:56,660 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:53:56,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1648876691] [2023-12-02 14:53:56,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1648876691] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:53:56,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:53:56,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-12-02 14:53:56,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226805438] [2023-12-02 14:53:56,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:53:56,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 14:53:56,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:53:56,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 14:53:56,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-12-02 14:53:56,662 INFO L87 Difference]: Start difference. First operand 174 states and 233 transitions. Second operand has 11 states, 8 states have (on average 3.375) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:53:59,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:53:59,529 INFO L93 Difference]: Finished difference Result 230 states and 289 transitions. [2023-12-02 14:53:59,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 14:53:59,530 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 3.375) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2023-12-02 14:53:59,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:53:59,532 INFO L225 Difference]: With dead ends: 230 [2023-12-02 14:53:59,532 INFO L226 Difference]: Without dead ends: 230 [2023-12-02 14:53:59,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2023-12-02 14:53:59,533 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 118 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-12-02 14:53:59,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 340 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-12-02 14:53:59,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2023-12-02 14:53:59,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 175. [2023-12-02 14:53:59,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 138 states have (on average 1.5434782608695652) internal successors, (213), 162 states have internal predecessors, (213), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 14:53:59,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 233 transitions. [2023-12-02 14:53:59,538 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 233 transitions. Word has length 31 [2023-12-02 14:53:59,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:53:59,539 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 233 transitions. [2023-12-02 14:53:59,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 3.375) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 14:53:59,539 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 233 transitions. [2023-12-02 14:53:59,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 14:53:59,539 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:53:59,539 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:53:59,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Ended with exit code 0 [2023-12-02 14:53:59,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:53:59,740 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-12-02 14:53:59,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:53:59,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1070334003, now seen corresponding path program 1 times [2023-12-02 14:53:59,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:53:59,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [863564652] [2023-12-02 14:53:59,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:53:59,741 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:53:59,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:53:59,742 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 14:53:59,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a460297-0eca-4306-95ce-52550224948a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2023-12-02 14:53:59,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:53:59,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 43 conjunts are in the unsatisfiable core [2023-12-02 14:53:59,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:53:59,962 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 7 [2023-12-02 14:54:00,229 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 14:54:00,229 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 13 treesize of output 13 [2023-12-02 14:54:00,527 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 7 [2023-12-02 14:54:00,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 14:54:01,047 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 19 treesize of output 1 [2023-12-02 14:54:01,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 27 [2023-12-02 14:54:01,427 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 33 treesize of output 21 [2023-12-02 14:54:01,686 INFO L349 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2023-12-02 14:54:01,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 18 [2023-12-02 14:54:01,797 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:54:01,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:54:02,349 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 98 treesize of output 92 [2023-12-02 14:54:06,745 INFO L349 Elim1Store]: treesize reduction 66, result has 69.6 percent of original size [2023-12-02 14:54:06,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 4915 treesize of output 4565