./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-broom/sll-shared-sll-before.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/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_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-broom/sll-shared-sll-before.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/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_8586057d-c6f6-466e-8e2d-33340eeaa7db/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 3d5c47b12a731095d5a51b5ad7e19fee7b2131bbe4b3910b3108642fe52c085d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 12:38:33,258 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 12:38:33,325 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2023-12-02 12:38:33,330 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 12:38:33,330 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 12:38:33,354 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 12:38:33,355 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 12:38:33,355 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 12:38:33,356 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 12:38:33,357 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 12:38:33,357 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 12:38:33,358 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 12:38:33,358 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 12:38:33,358 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 12:38:33,359 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 12:38:33,359 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 12:38:33,360 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 12:38:33,360 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 12:38:33,361 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 12:38:33,361 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 12:38:33,362 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 12:38:33,363 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 12:38:33,363 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 12:38:33,364 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 12:38:33,364 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 12:38:33,365 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 12:38:33,365 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 12:38:33,366 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 12:38:33,366 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 12:38:33,366 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 12:38:33,367 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 12:38:33,367 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 12:38:33,368 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 12:38:33,368 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 12:38:33,368 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 12:38:33,368 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 12:38:33,369 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 12:38:33,369 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:38:33,369 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 12:38:33,369 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 12:38:33,370 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 12:38:33,370 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 12:38:33,370 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 12:38:33,370 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 12:38:33,371 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 12:38:33,371 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_8586057d-c6f6-466e-8e2d-33340eeaa7db/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d5c47b12a731095d5a51b5ad7e19fee7b2131bbe4b3910b3108642fe52c085d [2023-12-02 12:38:33,616 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 12:38:33,636 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 12:38:33,639 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 12:38:33,640 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 12:38:33,640 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 12:38:33,642 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/memsafety-broom/sll-shared-sll-before.i [2023-12-02 12:38:36,420 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 12:38:36,655 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 12:38:36,656 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/sv-benchmarks/c/memsafety-broom/sll-shared-sll-before.i [2023-12-02 12:38:36,683 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/data/4f9d6404f/507a947fbd7b4a12bf1408394137e7ec/FLAG0f0631e50 [2023-12-02 12:38:36,698 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/data/4f9d6404f/507a947fbd7b4a12bf1408394137e7ec [2023-12-02 12:38:36,700 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 12:38:36,702 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 12:38:36,703 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 12:38:36,703 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 12:38:36,708 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 12:38:36,709 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:38:36" (1/1) ... [2023-12-02 12:38:36,710 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d5838a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:36, skipping insertion in model container [2023-12-02 12:38:36,710 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:38:36" (1/1) ... [2023-12-02 12:38:36,773 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 12:38:37,039 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:38:37,047 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 12:38:37,090 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:38:37,120 INFO L206 MainTranslator]: Completed translation [2023-12-02 12:38:37,121 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:37 WrapperNode [2023-12-02 12:38:37,121 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 12:38:37,122 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 12:38:37,122 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 12:38:37,123 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 12:38:37,130 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:37" (1/1) ... [2023-12-02 12:38:37,145 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:37" (1/1) ... [2023-12-02 12:38:37,168 INFO L138 Inliner]: procedures = 120, calls = 26, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 87 [2023-12-02 12:38:37,169 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 12:38:37,169 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 12:38:37,170 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 12:38:37,170 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 12:38:37,179 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:37" (1/1) ... [2023-12-02 12:38:37,179 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:37" (1/1) ... [2023-12-02 12:38:37,183 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:37" (1/1) ... [2023-12-02 12:38:37,183 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:37" (1/1) ... [2023-12-02 12:38:37,192 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:37" (1/1) ... [2023-12-02 12:38:37,196 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:37" (1/1) ... [2023-12-02 12:38:37,198 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:37" (1/1) ... [2023-12-02 12:38:37,199 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:37" (1/1) ... [2023-12-02 12:38:37,203 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 12:38:37,203 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 12:38:37,204 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 12:38:37,204 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 12:38:37,205 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:37" (1/1) ... [2023-12-02 12:38:37,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:38:37,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:38:37,234 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 12:38:37,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 12:38:37,272 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero_internal [2023-12-02 12:38:37,272 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero_internal [2023-12-02 12:38:37,273 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero [2023-12-02 12:38:37,273 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero [2023-12-02 12:38:37,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 12:38:37,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 12:38:37,273 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 12:38:37,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 12:38:37,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 12:38:37,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 12:38:37,391 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 12:38:37,394 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 12:38:37,668 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 12:38:37,733 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 12:38:37,733 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-12-02 12:38:37,735 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:38:37 BoogieIcfgContainer [2023-12-02 12:38:37,735 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 12:38:37,738 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 12:38:37,738 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 12:38:37,742 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 12:38:37,742 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:38:36" (1/3) ... [2023-12-02 12:38:37,743 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dc16e94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:38:37, skipping insertion in model container [2023-12-02 12:38:37,743 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:38:37" (2/3) ... [2023-12-02 12:38:37,743 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dc16e94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:38:37, skipping insertion in model container [2023-12-02 12:38:37,743 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:38:37" (3/3) ... [2023-12-02 12:38:37,745 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-shared-sll-before.i [2023-12-02 12:38:37,765 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 12:38:37,765 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 31 error locations. [2023-12-02 12:38:37,815 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 12:38:37,822 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;@5f98f688, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 12:38:37,822 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2023-12-02 12:38:37,827 INFO L276 IsEmpty]: Start isEmpty. Operand has 70 states, 32 states have (on average 2.15625) internal successors, (69), 63 states have internal predecessors, (69), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 12:38:37,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 12:38:37,834 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:38:37,834 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 12:38:37,835 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting alloc_and_zero_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-12-02 12:38:37,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:38:37,841 INFO L85 PathProgramCache]: Analyzing trace with hash 5463475, now seen corresponding path program 1 times [2023-12-02 12:38:37,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:38:37,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683154330] [2023-12-02 12:38:37,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:37,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:38:37,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:38,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:38:38,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:38:38,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683154330] [2023-12-02 12:38:38,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683154330] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:38:38,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:38:38,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 12:38:38,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767197829] [2023-12-02 12:38:38,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:38:38,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:38:38,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:38:38,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:38:38,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:38:38,081 INFO L87 Difference]: Start difference. First operand has 70 states, 32 states have (on average 2.15625) internal successors, (69), 63 states have internal predecessors, (69), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:38:38,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:38:38,178 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2023-12-02 12:38:38,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:38:38,181 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-12-02 12:38:38,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:38:38,188 INFO L225 Difference]: With dead ends: 69 [2023-12-02 12:38:38,188 INFO L226 Difference]: Without dead ends: 68 [2023-12-02 12:38:38,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:38:38,193 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 2 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:38:38,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 93 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:38:38,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-12-02 12:38:38,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-12-02 12:38:38,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 32 states have (on average 2.03125) internal successors, (65), 61 states have internal predecessors, (65), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 12:38:38,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2023-12-02 12:38:38,230 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 4 [2023-12-02 12:38:38,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:38:38,231 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2023-12-02 12:38:38,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:38:38,231 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2023-12-02 12:38:38,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 12:38:38,232 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:38:38,232 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 12:38:38,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 12:38:38,233 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting alloc_and_zero_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-12-02 12:38:38,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:38:38,234 INFO L85 PathProgramCache]: Analyzing trace with hash 5463476, now seen corresponding path program 1 times [2023-12-02 12:38:38,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:38:38,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464013989] [2023-12-02 12:38:38,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:38,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:38:38,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:38,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:38:38,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:38:38,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464013989] [2023-12-02 12:38:38,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464013989] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:38:38,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:38:38,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 12:38:38,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200233651] [2023-12-02 12:38:38,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:38:38,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:38:38,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:38:38,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:38:38,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:38:38,334 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:38:38,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:38:38,404 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2023-12-02 12:38:38,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:38:38,405 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-12-02 12:38:38,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:38:38,406 INFO L225 Difference]: With dead ends: 67 [2023-12-02 12:38:38,407 INFO L226 Difference]: Without dead ends: 67 [2023-12-02 12:38:38,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:38:38,409 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 1 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:38:38,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 98 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:38:38,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-12-02 12:38:38,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2023-12-02 12:38:38,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 32 states have (on average 2.0) internal successors, (64), 60 states have internal predecessors, (64), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 12:38:38,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2023-12-02 12:38:38,419 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 4 [2023-12-02 12:38:38,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:38:38,420 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2023-12-02 12:38:38,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:38:38,420 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2023-12-02 12:38:38,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 12:38:38,421 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:38:38,421 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:38:38,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 12:38:38,422 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-12-02 12:38:38,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:38:38,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1547906994, now seen corresponding path program 1 times [2023-12-02 12:38:38,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:38:38,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726055048] [2023-12-02 12:38:38,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:38,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:38:38,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:38,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:38:38,506 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:38:38,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726055048] [2023-12-02 12:38:38,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726055048] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:38:38,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:38:38,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 12:38:38,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630611762] [2023-12-02 12:38:38,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:38:38,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:38:38,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:38:38,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:38:38,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:38:38,509 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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 12:38:38,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:38:38,577 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2023-12-02 12:38:38,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:38:38,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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 12 [2023-12-02 12:38:38,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:38:38,579 INFO L225 Difference]: With dead ends: 65 [2023-12-02 12:38:38,579 INFO L226 Difference]: Without dead ends: 65 [2023-12-02 12:38:38,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:38:38,581 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 4 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:38:38,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 86 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:38:38,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-12-02 12:38:38,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-12-02 12:38:38,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 32 states have (on average 1.9375) internal successors, (62), 58 states have internal predecessors, (62), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 12:38:38,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2023-12-02 12:38:38,590 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 12 [2023-12-02 12:38:38,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:38:38,591 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2023-12-02 12:38:38,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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 12:38:38,592 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2023-12-02 12:38:38,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 12:38:38,593 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:38:38,593 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:38:38,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 12:38:38,593 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-12-02 12:38:38,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:38:38,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1547906995, now seen corresponding path program 1 times [2023-12-02 12:38:38,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:38:38,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312403425] [2023-12-02 12:38:38,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:38,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:38:38,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:38,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:38:38,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:38:38,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312403425] [2023-12-02 12:38:38,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312403425] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:38:38,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:38:38,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 12:38:38,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553670115] [2023-12-02 12:38:38,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:38:38,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:38:38,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:38:38,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:38:38,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:38:38,690 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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 12:38:38,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:38:38,746 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2023-12-02 12:38:38,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:38:38,746 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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 12 [2023-12-02 12:38:38,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:38:38,747 INFO L225 Difference]: With dead ends: 63 [2023-12-02 12:38:38,748 INFO L226 Difference]: Without dead ends: 63 [2023-12-02 12:38:38,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:38:38,749 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 2 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:38:38,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 91 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:38:38,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-12-02 12:38:38,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2023-12-02 12:38:38,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 32 states have (on average 1.875) internal successors, (60), 56 states have internal predecessors, (60), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 12:38:38,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2023-12-02 12:38:38,757 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 12 [2023-12-02 12:38:38,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:38:38,757 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2023-12-02 12:38:38,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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 12:38:38,758 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2023-12-02 12:38:38,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 12:38:38,758 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:38:38,758 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:38:38,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 12:38:38,759 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-12-02 12:38:38,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:38:38,759 INFO L85 PathProgramCache]: Analyzing trace with hash 788353883, now seen corresponding path program 1 times [2023-12-02 12:38:38,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:38:38,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378272812] [2023-12-02 12:38:38,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:38,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:38:38,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:38,963 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 12:38:38,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:38:38,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378272812] [2023-12-02 12:38:38,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378272812] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:38:38,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803585927] [2023-12-02 12:38:38,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:38,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:38:38,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:38:38,970 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:38:38,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 12:38:39,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:39,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 12:38:39,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:38:39,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 12:38:39,157 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2023-12-02 12:38:39,198 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-12-02 12:38:39,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-12-02 12:38:39,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-02 12:38:39,205 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:38:39,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803585927] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:38:39,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [900952195] [2023-12-02 12:38:39,285 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 12:38:39,285 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:38:39,289 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:38:39,294 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:38:39,295 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:38:39,697 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 64 for LOIs [2023-12-02 12:38:39,770 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:38:41,176 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '665#(and (= |ULTIMATE.start_create_internal_#t~ret7#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_create_internal_~now~0#1.offset| 0) (or (and (exists ((|v_ULTIMATE.start_create_internal_#t~nondet6#1_12| Int)) (and (<= 0 (+ |v_ULTIMATE.start_create_internal_#t~nondet6#1_12| 2147483648)) (not (= |v_ULTIMATE.start_create_internal_#t~nondet6#1_12| 0)) (<= |v_ULTIMATE.start_create_internal_#t~nondet6#1_12| 2147483647))) (not (= |ULTIMATE.start_create_internal_~sll~0#1.base| 0)) (exists ((|v_#valid_83| (Array Int Int))) (and (= (select |v_#valid_83| |ULTIMATE.start_create_internal_#t~ret7#1.base|) 0) (= (store |v_#valid_83| |ULTIMATE.start_create_internal_#t~ret7#1.base| 1) |#valid|))) (<= (+ |ULTIMATE.start_create_internal_#t~ret7#1.base| 1) |#StackHeapBarrier|) (= |ULTIMATE.start_create_internal_~sll~0#1.base| |ULTIMATE.start_create_internal_~now~0#1.base|) (exists ((|v_#length_65| (Array Int Int))) (= (store |v_#length_65| |ULTIMATE.start_create_internal_#t~ret7#1.base| 8) |#length|)) (exists ((|v_#valid_81| (Array Int Int))) (= (select |v_#valid_81| |ULTIMATE.start_create_internal_~sll~0#1.base|) 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (not (= |ULTIMATE.start_create_internal_#t~ret7#1.base| 0)) (exists ((|v_#memory_$Pointer$.offset_68| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_68| |ULTIMATE.start_create_internal_#t~ret7#1.base| (store (select |v_#memory_$Pointer$.offset_68| |ULTIMATE.start_create_internal_#t~ret7#1.base|) 0 0)))) (exists ((|v_#memory_$Pointer$.base_68| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_68| |ULTIMATE.start_create_internal_#t~ret7#1.base| (store (select |v_#memory_$Pointer$.base_68| |ULTIMATE.start_create_internal_#t~ret7#1.base|) 0 0)))) (<= (+ |ULTIMATE.start_create_internal_~sll~0#1.base| 1) |#StackHeapBarrier|)) (and (exists ((|v_ULTIMATE.start_create_internal_#t~nondet6#1_12| Int)) (and (<= 0 (+ |v_ULTIMATE.start_create_internal_#t~nondet6#1_12| 2147483648)) (not (= |v_ULTIMATE.start_create_internal_#t~nondet6#1_12| 0)) (<= |v_ULTIMATE.start_create_internal_#t~nondet6#1_12| 2147483647))) (not (= |ULTIMATE.start_create_internal_~sll~0#1.base| 0)) (<= (+ |ULTIMATE.start_create_internal_#t~ret7#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#length_64| (Array Int Int))) (= |#length| (store |v_#length_64| |ULTIMATE.start_create_internal_#t~ret7#1.base| 8))) (= |ULTIMATE.start_create_internal_~sll~0#1.base| |ULTIMATE.start_create_internal_~now~0#1.base|) (exists ((|v_#memory_$Pointer$.offset_69| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_69| |ULTIMATE.start_create_internal_#t~ret7#1.base| (store (select |v_#memory_$Pointer$.offset_69| |ULTIMATE.start_create_internal_#t~ret7#1.base|) 0 0)))) (exists ((|v_#valid_81| (Array Int Int))) (= (select |v_#valid_81| |ULTIMATE.start_create_internal_~sll~0#1.base|) 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (not (= |ULTIMATE.start_create_internal_#t~ret7#1.base| 0)) (exists ((|v_#memory_$Pointer$.base_68| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_68| |ULTIMATE.start_create_internal_#t~ret7#1.base| (store (select |v_#memory_$Pointer$.base_68| |ULTIMATE.start_create_internal_#t~ret7#1.base|) 0 0)))) (<= (+ |ULTIMATE.start_create_internal_~sll~0#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#valid_82| (Array Int Int))) (and (= |#valid| (store |v_#valid_82| |ULTIMATE.start_create_internal_#t~ret7#1.base| 1)) (= (select |v_#valid_82| |ULTIMATE.start_create_internal_#t~ret7#1.base|) 0))))) (not (= (select |#valid| |ULTIMATE.start_create_internal_~now~0#1.base|) 1)) (= |ULTIMATE.start_create_internal_~sll~0#1.offset| 0))' at error location [2023-12-02 12:38:41,176 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:38:41,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:38:41,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-12-02 12:38:41,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744635916] [2023-12-02 12:38:41,177 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:38:41,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 12:38:41,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:38:41,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 12:38:41,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=4, NotChecked=34, Total=380 [2023-12-02 12:38:41,178 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 10 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 12:38:41,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:38:41,497 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2023-12-02 12:38:41,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 12:38:41,498 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 13 [2023-12-02 12:38:41,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:38:41,499 INFO L225 Difference]: With dead ends: 68 [2023-12-02 12:38:41,499 INFO L226 Difference]: Without dead ends: 68 [2023-12-02 12:38:41,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=4, NotChecked=38, Total=462 [2023-12-02 12:38:41,501 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 8 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:38:41,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 226 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 284 Invalid, 0 Unknown, 73 Unchecked, 0.2s Time] [2023-12-02 12:38:41,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-12-02 12:38:41,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2023-12-02 12:38:41,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 58 states have internal predecessors, (64), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 12:38:41,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2023-12-02 12:38:41,509 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 13 [2023-12-02 12:38:41,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:38:41,509 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2023-12-02 12:38:41,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 12:38:41,510 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2023-12-02 12:38:41,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 12:38:41,510 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:38:41,510 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:38:41,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-02 12:38:41,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:38:41,716 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-12-02 12:38:41,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:38:41,717 INFO L85 PathProgramCache]: Analyzing trace with hash 788353884, now seen corresponding path program 1 times [2023-12-02 12:38:41,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:38:41,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502865063] [2023-12-02 12:38:41,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:41,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:38:41,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:41,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:38:41,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:38:41,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502865063] [2023-12-02 12:38:41,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502865063] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:38:41,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745638891] [2023-12-02 12:38:41,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:41,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:38:41,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:38:41,924 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:38:41,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 12:38:41,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:41,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 12:38:41,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:38:42,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 12:38:42,132 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2023-12-02 12:38:42,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:38:42,148 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 12:38:42,158 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 12:38:42,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 12:38:42,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-02 12:38:42,179 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:38:42,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745638891] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:38:42,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1945961555] [2023-12-02 12:38:42,272 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 12:38:42,272 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:38:42,273 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:38:42,273 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:38:42,273 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:38:42,441 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 64 for LOIs [2023-12-02 12:38:42,473 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:38:43,851 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '871#(and (= |ULTIMATE.start_create_internal_#t~ret7#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_create_internal_~now~0#1.offset| 0) (or (and (exists ((|v_#valid_93| (Array Int Int))) (= (select |v_#valid_93| |ULTIMATE.start_create_internal_~sll~0#1.base|) 0)) (not (= |ULTIMATE.start_create_internal_~sll~0#1.base| 0)) (exists ((|v_#length_74| (Array Int Int))) (= |#length| (store |v_#length_74| |ULTIMATE.start_create_internal_#t~ret7#1.base| 8))) (<= (+ |ULTIMATE.start_create_internal_#t~ret7#1.base| 1) |#StackHeapBarrier|) (= |ULTIMATE.start_create_internal_~sll~0#1.base| |ULTIMATE.start_create_internal_~now~0#1.base|) (exists ((|v_#memory_$Pointer$.offset_76| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_76| |ULTIMATE.start_create_internal_#t~ret7#1.base| (store (select |v_#memory_$Pointer$.offset_76| |ULTIMATE.start_create_internal_#t~ret7#1.base|) 0 0)))) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (exists ((|v_#valid_92| (Array Int Int))) (and (= (store |v_#valid_92| |ULTIMATE.start_create_internal_#t~ret7#1.base| 1) |#valid|) (= (select |v_#valid_92| |ULTIMATE.start_create_internal_#t~ret7#1.base|) 0))) (not (= |ULTIMATE.start_create_internal_#t~ret7#1.base| 0)) (<= (+ |ULTIMATE.start_create_internal_~sll~0#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.base_77| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_77| |ULTIMATE.start_create_internal_#t~ret7#1.base| (store (select |v_#memory_$Pointer$.base_77| |ULTIMATE.start_create_internal_#t~ret7#1.base|) 0 0)) |#memory_$Pointer$.base|)) (exists ((|v_ULTIMATE.start_create_internal_#t~nondet6#1_13| Int)) (and (not (= |v_ULTIMATE.start_create_internal_#t~nondet6#1_13| 0)) (<= |v_ULTIMATE.start_create_internal_#t~nondet6#1_13| 2147483647) (<= 0 (+ |v_ULTIMATE.start_create_internal_#t~nondet6#1_13| 2147483648))))) (and (not (= |ULTIMATE.start_create_internal_~sll~0#1.base| 0)) (<= (+ |ULTIMATE.start_create_internal_#t~ret7#1.base| 1) |#StackHeapBarrier|) (= |ULTIMATE.start_create_internal_~sll~0#1.base| |ULTIMATE.start_create_internal_~now~0#1.base|) (exists ((|v_#memory_$Pointer$.offset_76| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_76| |ULTIMATE.start_create_internal_#t~ret7#1.base| (store (select |v_#memory_$Pointer$.offset_76| |ULTIMATE.start_create_internal_#t~ret7#1.base|) 0 0)))) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (exists ((|v_#memory_$Pointer$.base_78| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_78| |ULTIMATE.start_create_internal_#t~ret7#1.base| (store (select |v_#memory_$Pointer$.base_78| |ULTIMATE.start_create_internal_#t~ret7#1.base|) 0 0)) |#memory_$Pointer$.base|)) (not (= |ULTIMATE.start_create_internal_#t~ret7#1.base| 0)) (<= (+ |ULTIMATE.start_create_internal_~sll~0#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#valid_94| (Array Int Int))) (and (= (select |v_#valid_94| |ULTIMATE.start_create_internal_#t~ret7#1.base|) 0) (= (store |v_#valid_94| |ULTIMATE.start_create_internal_#t~ret7#1.base| 1) |#valid|))) (exists ((|v_#valid_92| (Array Int Int))) (= (select |v_#valid_92| |ULTIMATE.start_create_internal_~sll~0#1.base|) 0)) (exists ((|v_#length_76| (Array Int Int))) (= (store |v_#length_76| |ULTIMATE.start_create_internal_#t~ret7#1.base| 8) |#length|)) (exists ((|v_ULTIMATE.start_create_internal_#t~nondet6#1_13| Int)) (and (not (= |v_ULTIMATE.start_create_internal_#t~nondet6#1_13| 0)) (<= |v_ULTIMATE.start_create_internal_#t~nondet6#1_13| 2147483647) (<= 0 (+ |v_ULTIMATE.start_create_internal_#t~nondet6#1_13| 2147483648)))))) (= |ULTIMATE.start_create_internal_~sll~0#1.offset| 0) (<= (select |#length| |ULTIMATE.start_create_internal_~now~0#1.base|) 7))' at error location [2023-12-02 12:38:43,851 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:38:43,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:38:43,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-12-02 12:38:43,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337773411] [2023-12-02 12:38:43,852 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:38:43,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 12:38:43,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:38:43,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 12:38:43,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=520, Unknown=3, NotChecked=46, Total=650 [2023-12-02 12:38:43,853 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand has 16 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 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 12:38:44,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:38:44,202 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2023-12-02 12:38:44,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 12:38:44,202 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 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 13 [2023-12-02 12:38:44,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:38:44,203 INFO L225 Difference]: With dead ends: 67 [2023-12-02 12:38:44,203 INFO L226 Difference]: Without dead ends: 67 [2023-12-02 12:38:44,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=4, NotChecked=54, Total=870 [2023-12-02 12:38:44,204 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:38:44,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 379 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 390 Invalid, 0 Unknown, 72 Unchecked, 0.2s Time] [2023-12-02 12:38:44,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-12-02 12:38:44,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2023-12-02 12:38:44,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 35 states have (on average 1.7714285714285714) internal successors, (62), 57 states have internal predecessors, (62), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 12:38:44,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2023-12-02 12:38:44,208 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 13 [2023-12-02 12:38:44,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:38:44,209 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2023-12-02 12:38:44,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 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 12:38:44,209 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2023-12-02 12:38:44,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 12:38:44,209 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:38:44,210 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:38:44,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 12:38:44,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-02 12:38:44,410 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-12-02 12:38:44,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:38:44,411 INFO L85 PathProgramCache]: Analyzing trace with hash 588517071, now seen corresponding path program 1 times [2023-12-02 12:38:44,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:38:44,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370413664] [2023-12-02 12:38:44,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:44,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:38:44,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:44,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:38:44,484 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:38:44,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370413664] [2023-12-02 12:38:44,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370413664] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:38:44,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:38:44,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 12:38:44,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237307303] [2023-12-02 12:38:44,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:38:44,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:38:44,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:38:44,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:38:44,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:38:44,486 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 6 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 12:38:44,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:38:44,589 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2023-12-02 12:38:44,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 12:38:44,590 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2023-12-02 12:38:44,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:38:44,592 INFO L225 Difference]: With dead ends: 66 [2023-12-02 12:38:44,592 INFO L226 Difference]: Without dead ends: 66 [2023-12-02 12:38:44,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:38:44,594 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 12 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:38:44,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 147 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:38:44,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-12-02 12:38:44,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2023-12-02 12:38:44,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 54 states have internal predecessors, (59), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 12:38:44,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2023-12-02 12:38:44,601 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 16 [2023-12-02 12:38:44,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:38:44,602 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2023-12-02 12:38:44,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 12:38:44,602 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2023-12-02 12:38:44,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 12:38:44,603 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:38:44,603 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:38:44,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 12:38:44,603 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-12-02 12:38:44,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:38:44,604 INFO L85 PathProgramCache]: Analyzing trace with hash 588517072, now seen corresponding path program 1 times [2023-12-02 12:38:44,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:38:44,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057964714] [2023-12-02 12:38:44,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:44,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:38:44,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:44,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:38:44,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:38:44,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057964714] [2023-12-02 12:38:44,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057964714] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:38:44,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:38:44,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 12:38:44,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825999281] [2023-12-02 12:38:44,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:38:44,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:38:44,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:38:44,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:38:44,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:38:44,721 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 6 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 12:38:44,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:38:44,811 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2023-12-02 12:38:44,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 12:38:44,812 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2023-12-02 12:38:44,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:38:44,813 INFO L225 Difference]: With dead ends: 65 [2023-12-02 12:38:44,813 INFO L226 Difference]: Without dead ends: 65 [2023-12-02 12:38:44,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:38:44,814 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 5 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:38:44,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 184 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:38:44,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-12-02 12:38:44,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2023-12-02 12:38:44,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 53 states have internal predecessors, (58), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 12:38:44,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2023-12-02 12:38:44,820 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 16 [2023-12-02 12:38:44,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:38:44,820 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2023-12-02 12:38:44,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 12:38:44,821 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2023-12-02 12:38:44,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-02 12:38:44,822 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:38:44,822 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:38:44,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 12:38:44,822 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-12-02 12:38:44,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:38:44,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1064676751, now seen corresponding path program 1 times [2023-12-02 12:38:44,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:38:44,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092595799] [2023-12-02 12:38:44,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:44,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:38:44,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:45,019 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 12:38:45,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:38:45,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092595799] [2023-12-02 12:38:45,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092595799] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:38:45,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124773616] [2023-12-02 12:38:45,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:45,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:38:45,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:38:45,021 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:38:45,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 12:38:45,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:45,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 12:38:45,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:38:45,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 12:38:45,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 12:38:45,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-12-02 12:38:45,141 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2023-12-02 12:38:45,163 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-12-02 12:38:45,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-12-02 12:38:45,165 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-12-02 12:38:45,166 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:38:45,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124773616] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:38:45,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [101219266] [2023-12-02 12:38:45,215 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-12-02 12:38:45,215 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:38:45,215 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:38:45,215 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:38:45,216 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:38:45,909 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 32 for LOIs [2023-12-02 12:38:45,930 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:38:46,530 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1368#(and (exists ((|v_ULTIMATE.start_create_internal_#t~nondet6#1_17| Int)) (and (not (= |v_ULTIMATE.start_create_internal_#t~nondet6#1_17| 0)) (<= |v_ULTIMATE.start_create_internal_#t~nondet6#1_17| 2147483647) (<= 0 (+ |v_ULTIMATE.start_create_internal_#t~nondet6#1_17| 2147483648)))) (exists ((|v_#memory_$Pointer$.offset_84| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_84| |ULTIMATE.start_create_internal_#t~ret7#1.base| (store (select |v_#memory_$Pointer$.offset_84| |ULTIMATE.start_create_internal_#t~ret7#1.base|) 0 0)))) (= |ULTIMATE.start_create_internal_#t~ret7#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= (+ |ULTIMATE.start_create_internal_#t~ret7#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#length_82| (Array Int Int))) (= |#length| (store |v_#length_82| |ULTIMATE.start_create_internal_#t~ret7#1.base| 8))) (exists ((|v_#valid_104| (Array Int Int))) (and (= (store |v_#valid_104| |ULTIMATE.start_create_internal_#t~ret7#1.base| 1) |#valid|) (= (select |v_#valid_104| |ULTIMATE.start_create_internal_#t~ret7#1.base|) 0))) (not (= (select |#valid| |ULTIMATE.start_create_internal_~now~0#1.base|) 1)) (not (= |ULTIMATE.start_create_internal_#t~ret7#1.base| 0)) (exists ((|v_#memory_$Pointer$.base_85| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_85| |ULTIMATE.start_create_internal_#t~ret7#1.base| (store (select |v_#memory_$Pointer$.base_85| |ULTIMATE.start_create_internal_#t~ret7#1.base|) 0 0)) |#memory_$Pointer$.base|)) (= |ULTIMATE.start_create_internal_~sll~0#1.offset| 0))' at error location [2023-12-02 12:38:46,531 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:38:46,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:38:46,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2023-12-02 12:38:46,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630505243] [2023-12-02 12:38:46,531 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:38:46,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 12:38:46,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:38:46,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 12:38:46,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=359, Unknown=1, NotChecked=38, Total=462 [2023-12-02 12:38:46,533 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand has 11 states, 8 states have (on average 2.125) internal successors, (17), 9 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 12:38:46,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:38:46,787 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2023-12-02 12:38:46,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 12:38:46,787 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.125) internal successors, (17), 9 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 21 [2023-12-02 12:38:46,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:38:46,788 INFO L225 Difference]: With dead ends: 61 [2023-12-02 12:38:46,788 INFO L226 Difference]: Without dead ends: 61 [2023-12-02 12:38:46,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=90, Invalid=513, Unknown=1, NotChecked=46, Total=650 [2023-12-02 12:38:46,789 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 7 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:38:46,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 251 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 262 Invalid, 0 Unknown, 66 Unchecked, 0.2s Time] [2023-12-02 12:38:46,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-12-02 12:38:46,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2023-12-02 12:38:46,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 52 states have internal predecessors, (57), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 12:38:46,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2023-12-02 12:38:46,793 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 21 [2023-12-02 12:38:46,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:38:46,794 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2023-12-02 12:38:46,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.125) internal successors, (17), 9 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 12:38:46,794 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2023-12-02 12:38:46,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-02 12:38:46,795 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:38:46,795 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:38:46,799 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 12:38:46,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-12-02 12:38:46,996 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-12-02 12:38:46,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:38:46,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1064676752, now seen corresponding path program 1 times [2023-12-02 12:38:46,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:38:46,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885490454] [2023-12-02 12:38:46,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:46,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:38:47,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:47,335 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 12:38:47,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:38:47,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885490454] [2023-12-02 12:38:47,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885490454] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:38:47,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501198448] [2023-12-02 12:38:47,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:47,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:38:47,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:38:47,336 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:38:47,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 12:38:47,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:47,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-02 12:38:47,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:38:47,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 12:38:47,438 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 8 treesize of output 1 [2023-12-02 12:38:47,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 12:38:47,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 12:38:47,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2023-12-02 12:38:47,526 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2023-12-02 12:38:47,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:38:47,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:38:47,548 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 12:38:47,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 12:38:47,551 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-12-02 12:38:47,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:38:47,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501198448] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:38:47,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [250516885] [2023-12-02 12:38:47,648 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-12-02 12:38:47,649 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:38:47,649 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:38:47,649 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:38:47,649 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:38:48,344 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 32 for LOIs [2023-12-02 12:38:48,367 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:38:49,029 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1588#(and (exists ((|v_ULTIMATE.start_create_internal_#t~nondet6#1_21| Int)) (and (<= 0 (+ |v_ULTIMATE.start_create_internal_#t~nondet6#1_21| 2147483648)) (<= |v_ULTIMATE.start_create_internal_#t~nondet6#1_21| 2147483647) (not (= |v_ULTIMATE.start_create_internal_#t~nondet6#1_21| 0)))) (= |ULTIMATE.start_create_internal_#t~ret7#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= (+ |ULTIMATE.start_create_internal_#t~ret7#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#length_94| (Array Int Int))) (= |#length| (store |v_#length_94| |ULTIMATE.start_create_internal_#t~ret7#1.base| 8))) (exists ((|v_#memory_$Pointer$.offset_97| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_97| |ULTIMATE.start_create_internal_#t~ret7#1.base| (store (select |v_#memory_$Pointer$.offset_97| |ULTIMATE.start_create_internal_#t~ret7#1.base|) 0 0)))) (exists ((|v_#memory_$Pointer$.base_98| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_98| |ULTIMATE.start_create_internal_#t~ret7#1.base| (store (select |v_#memory_$Pointer$.base_98| |ULTIMATE.start_create_internal_#t~ret7#1.base|) 0 0)))) (not (= |ULTIMATE.start_create_internal_#t~ret7#1.base| 0)) (or (< |ULTIMATE.start_create_internal_~now~0#1.offset| 0) (< (select |#length| |ULTIMATE.start_create_internal_~now~0#1.base|) (+ |ULTIMATE.start_create_internal_~now~0#1.offset| 8))) (exists ((|v_#valid_115| (Array Int Int))) (and (= (select |v_#valid_115| |ULTIMATE.start_create_internal_#t~ret7#1.base|) 0) (= |#valid| (store |v_#valid_115| |ULTIMATE.start_create_internal_#t~ret7#1.base| 1)))) (= |ULTIMATE.start_create_internal_~sll~0#1.offset| 0))' at error location [2023-12-02 12:38:49,029 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:38:49,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:38:49,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2023-12-02 12:38:49,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204546219] [2023-12-02 12:38:49,030 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:38:49,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 12:38:49,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:38:49,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 12:38:49,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=480, Unknown=1, NotChecked=44, Total=600 [2023-12-02 12:38:49,032 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand has 13 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 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 12:38:49,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:38:49,310 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2023-12-02 12:38:49,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 12:38:49,310 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 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 21 [2023-12-02 12:38:49,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:38:49,311 INFO L225 Difference]: With dead ends: 61 [2023-12-02 12:38:49,311 INFO L226 Difference]: Without dead ends: 61 [2023-12-02 12:38:49,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=104, Invalid=655, Unknown=1, NotChecked=52, Total=812 [2023-12-02 12:38:49,312 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 7 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:38:49,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 240 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 292 Invalid, 0 Unknown, 66 Unchecked, 0.2s Time] [2023-12-02 12:38:49,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-12-02 12:38:49,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2023-12-02 12:38:49,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.625) internal successors, (52), 48 states have internal predecessors, (52), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 12:38:49,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2023-12-02 12:38:49,317 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 21 [2023-12-02 12:38:49,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:38:49,317 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2023-12-02 12:38:49,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 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 12:38:49,317 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2023-12-02 12:38:49,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-02 12:38:49,318 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:38:49,318 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 12:38:49,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 12:38:49,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 12:38:49,519 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-12-02 12:38:49,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:38:49,519 INFO L85 PathProgramCache]: Analyzing trace with hash -276248669, now seen corresponding path program 1 times [2023-12-02 12:38:49,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:38:49,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048449074] [2023-12-02 12:38:49,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:49,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:38:49,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:49,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:38:49,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:38:49,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048449074] [2023-12-02 12:38:49,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048449074] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:38:49,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:38:49,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-12-02 12:38:49,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758023510] [2023-12-02 12:38:49,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:38:49,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 12:38:49,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:38:49,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 12:38:49,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-12-02 12:38:49,691 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand has 11 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 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 12:38:49,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:38:49,908 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2023-12-02 12:38:49,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 12:38:49,908 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 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 21 [2023-12-02 12:38:49,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:38:49,909 INFO L225 Difference]: With dead ends: 74 [2023-12-02 12:38:49,909 INFO L226 Difference]: Without dead ends: 74 [2023-12-02 12:38:49,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-12-02 12:38:49,910 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 47 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:38:49,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 152 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:38:49,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-12-02 12:38:49,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2023-12-02 12:38:49,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 49 states have internal predecessors, (55), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 12:38:49,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2023-12-02 12:38:49,915 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 21 [2023-12-02 12:38:49,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:38:49,915 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2023-12-02 12:38:49,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 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 12:38:49,916 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2023-12-02 12:38:49,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-02 12:38:49,916 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:38:49,917 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 12:38:49,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 12:38:49,917 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-12-02 12:38:49,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:38:49,918 INFO L85 PathProgramCache]: Analyzing trace with hash -276248668, now seen corresponding path program 1 times [2023-12-02 12:38:49,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:38:49,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559280705] [2023-12-02 12:38:49,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:49,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:38:49,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:50,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:38:50,161 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:38:50,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559280705] [2023-12-02 12:38:50,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559280705] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:38:50,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:38:50,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-02 12:38:50,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530570742] [2023-12-02 12:38:50,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:38:50,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 12:38:50,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:38:50,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 12:38:50,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-12-02 12:38:50,163 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 12 states, 8 states have (on average 2.125) internal successors, (17), 10 states have internal predecessors, (17), 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 12:38:50,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:38:50,472 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2023-12-02 12:38:50,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 12:38:50,473 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 2.125) internal successors, (17), 10 states have internal predecessors, (17), 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 21 [2023-12-02 12:38:50,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:38:50,474 INFO L225 Difference]: With dead ends: 94 [2023-12-02 12:38:50,474 INFO L226 Difference]: Without dead ends: 94 [2023-12-02 12:38:50,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-12-02 12:38:50,475 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 39 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:38:50,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 205 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:38:50,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-12-02 12:38:50,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 68. [2023-12-02 12:38:50,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 60 states have internal predecessors, (69), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 12:38:50,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2023-12-02 12:38:50,480 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 21 [2023-12-02 12:38:50,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:38:50,480 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2023-12-02 12:38:50,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 2.125) internal successors, (17), 10 states have internal predecessors, (17), 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 12:38:50,481 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2023-12-02 12:38:50,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 12:38:50,482 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:38:50,482 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 12:38:50,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-02 12:38:50,482 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-12-02 12:38:50,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:38:50,483 INFO L85 PathProgramCache]: Analyzing trace with hash 26297727, now seen corresponding path program 1 times [2023-12-02 12:38:50,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:38:50,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707231574] [2023-12-02 12:38:50,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:50,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:38:50,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:50,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:38:50,567 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:38:50,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707231574] [2023-12-02 12:38:50,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707231574] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:38:50,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:38:50,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 12:38:50,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562275770] [2023-12-02 12:38:50,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:38:50,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 12:38:50,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:38:50,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 12:38:50,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 12:38:50,569 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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 12:38:50,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:38:50,653 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2023-12-02 12:38:50,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 12:38:50,655 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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 12:38:50,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:38:50,655 INFO L225 Difference]: With dead ends: 74 [2023-12-02 12:38:50,656 INFO L226 Difference]: Without dead ends: 74 [2023-12-02 12:38:50,656 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 12:38:50,656 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 51 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:38:50,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 249 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:38:50,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-12-02 12:38:50,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2023-12-02 12:38:50,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 45 states have (on average 1.488888888888889) internal successors, (67), 60 states have internal predecessors, (67), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 12:38:50,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2023-12-02 12:38:50,661 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 22 [2023-12-02 12:38:50,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:38:50,661 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2023-12-02 12:38:50,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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 12:38:50,662 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2023-12-02 12:38:50,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 12:38:50,663 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:38:50,663 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] [2023-12-02 12:38:50,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-02 12:38:50,663 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-12-02 12:38:50,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:38:50,664 INFO L85 PathProgramCache]: Analyzing trace with hash 813066789, now seen corresponding path program 1 times [2023-12-02 12:38:50,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:38:50,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903544584] [2023-12-02 12:38:50,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:50,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:38:50,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:50,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:38:50,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:38:50,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903544584] [2023-12-02 12:38:50,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903544584] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:38:50,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:38:50,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 12:38:50,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038421521] [2023-12-02 12:38:50,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:38:50,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 12:38:50,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:38:50,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 12:38:50,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 12:38:50,789 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (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 12:38:50,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:38:50,927 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2023-12-02 12:38:50,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 12:38:50,928 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (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 23 [2023-12-02 12:38:50,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:38:50,929 INFO L225 Difference]: With dead ends: 72 [2023-12-02 12:38:50,929 INFO L226 Difference]: Without dead ends: 72 [2023-12-02 12:38:50,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-02 12:38:50,930 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 45 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:38:50,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 187 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:38:50,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-12-02 12:38:50,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2023-12-02 12:38:50,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 47 states have (on average 1.4893617021276595) internal successors, (70), 62 states have internal predecessors, (70), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 12:38:50,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2023-12-02 12:38:50,933 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 23 [2023-12-02 12:38:50,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:38:50,933 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2023-12-02 12:38:50,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (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 12:38:50,934 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2023-12-02 12:38:50,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 12:38:50,935 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:38:50,935 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] [2023-12-02 12:38:50,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-02 12:38:50,935 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-12-02 12:38:50,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:38:50,936 INFO L85 PathProgramCache]: Analyzing trace with hash 899246978, now seen corresponding path program 1 times [2023-12-02 12:38:50,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:38:50,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296031930] [2023-12-02 12:38:50,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:50,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:38:50,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:51,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:38:51,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:38:51,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296031930] [2023-12-02 12:38:51,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296031930] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:38:51,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347113672] [2023-12-02 12:38:51,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:51,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:38:51,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:38:51,099 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:38:51,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 12:38:51,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:38:51,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 12:38:51,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:38:51,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 12:38:51,218 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_~pi~0.base (select |c_#valid| alloc_and_zero_~pi~0.base))))) is different from true [2023-12-02 12:38:51,240 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-12-02 12:38:51,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-12-02 12:38:51,243 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 12:38:51,243 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:38:51,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347113672] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:38:51,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1662003281] [2023-12-02 12:38:51,282 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-12-02 12:38:51,282 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:38:51,282 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:38:51,282 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:38:51,282 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:38:51,686 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 19 for LOIs [2023-12-02 12:38:51,694 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 106 for LOIs [2023-12-02 12:38:51,783 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:38:59,475 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2442#(and (not (= (select |#valid| |ULTIMATE.start_create_~now~1#1.base|) 1)) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_create_~shared#1.offset| 0) (= |ULTIMATE.start_create_internal_#res#1.offset| 0) (or (and (<= (+ |ULTIMATE.start_create_~sll~1#1.base| 1) |#StackHeapBarrier|) (not (= |ULTIMATE.start_create_~sll~1#1.base| 0)) (exists ((|v_#valid_127| (Array Int Int))) (= (select |v_#valid_127| |ULTIMATE.start_create_internal_#res#1.base|) 0)) (= |ULTIMATE.start_create_#in~shared#1.base| |ULTIMATE.start_create_~shared#1.base|) (exists ((|v_#valid_129| (Array Int Int))) (= (select |v_#valid_129| |ULTIMATE.start_create_~sll~1#1.base|) 0)) (exists ((|v_#memory_$Pointer$.offset_111| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_111| |ULTIMATE.start_create_#t~ret11#1.base| (store (store (select |v_#memory_$Pointer$.offset_111| |ULTIMATE.start_create_#t~ret11#1.base|) 0 0) 8 0)))) (<= (+ |ULTIMATE.start_create_internal_#res#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.base_115| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_115| |ULTIMATE.start_create_#t~ret11#1.base| (store (store (select |v_#memory_$Pointer$.base_115| |ULTIMATE.start_create_#t~ret11#1.base|) 0 0) 8 0)))) (= |ULTIMATE.start_create_internal_#res#1.base| |ULTIMATE.start_main_~shared~0#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (= |ULTIMATE.start_create_#in~shared#1.base| |ULTIMATE.start_main_~shared~0#1.base|) (exists ((|v_#valid_128| (Array Int Int))) (and (= (select |v_#valid_128| |ULTIMATE.start_create_#t~ret11#1.base|) 0) (= (store |v_#valid_128| |ULTIMATE.start_create_#t~ret11#1.base| 1) |#valid|))) (exists ((|v_ULTIMATE.start_create_#t~nondet10#1_12| Int)) (and (<= |v_ULTIMATE.start_create_#t~nondet10#1_12| 2147483647) (<= 0 (+ |v_ULTIMATE.start_create_#t~nondet10#1_12| 2147483648)) (not (= |v_ULTIMATE.start_create_#t~nondet10#1_12| 0)))) (<= (+ |ULTIMATE.start_create_#t~ret11#1.base| 1) |#StackHeapBarrier|) (not (= |ULTIMATE.start_create_internal_#res#1.base| 0)) (exists ((|v_#length_103| (Array Int Int))) (= (store |v_#length_103| |ULTIMATE.start_create_#t~ret11#1.base| 16) |#length|)) (= |ULTIMATE.start_create_~now~1#1.base| |ULTIMATE.start_create_~sll~1#1.base|) (not (= |ULTIMATE.start_create_#t~ret11#1.base| 0))) (and (<= (+ |ULTIMATE.start_create_~sll~1#1.base| 1) |#StackHeapBarrier|) (not (= |ULTIMATE.start_create_~sll~1#1.base| 0)) (exists ((|v_#valid_127| (Array Int Int))) (= (select |v_#valid_127| |ULTIMATE.start_create_internal_#res#1.base|) 0)) (= |ULTIMATE.start_create_#in~shared#1.base| |ULTIMATE.start_create_~shared#1.base|) (<= (+ |ULTIMATE.start_create_internal_#res#1.base| 1) |#StackHeapBarrier|) (= |ULTIMATE.start_create_internal_#res#1.base| |ULTIMATE.start_main_~shared~0#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (= |ULTIMATE.start_create_#in~shared#1.base| |ULTIMATE.start_main_~shared~0#1.base|) (exists ((|v_#valid_128| (Array Int Int))) (and (= (select |v_#valid_128| |ULTIMATE.start_create_#t~ret11#1.base|) 0) (= (store |v_#valid_128| |ULTIMATE.start_create_#t~ret11#1.base| 1) |#valid|))) (exists ((|v_#memory_$Pointer$.base_112| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_112| |ULTIMATE.start_create_#t~ret11#1.base| (store (store (select |v_#memory_$Pointer$.base_112| |ULTIMATE.start_create_#t~ret11#1.base|) 0 0) 8 0)) |#memory_$Pointer$.base|)) (exists ((|v_ULTIMATE.start_create_#t~nondet10#1_12| Int)) (and (<= |v_ULTIMATE.start_create_#t~nondet10#1_12| 2147483647) (<= 0 (+ |v_ULTIMATE.start_create_#t~nondet10#1_12| 2147483648)) (not (= |v_ULTIMATE.start_create_#t~nondet10#1_12| 0)))) (<= (+ |ULTIMATE.start_create_#t~ret11#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.offset_115| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_115| |ULTIMATE.start_create_#t~ret11#1.base| (store (store (select |v_#memory_$Pointer$.offset_115| |ULTIMATE.start_create_#t~ret11#1.base|) 0 0) 8 0)))) (not (= |ULTIMATE.start_create_internal_#res#1.base| 0)) (exists ((|v_#valid_130| (Array Int Int))) (= (select |v_#valid_130| |ULTIMATE.start_create_~sll~1#1.base|) 0)) (exists ((|v_#length_103| (Array Int Int))) (= (store |v_#length_103| |ULTIMATE.start_create_#t~ret11#1.base| 16) |#length|)) (= |ULTIMATE.start_create_~now~1#1.base| |ULTIMATE.start_create_~sll~1#1.base|) (not (= |ULTIMATE.start_create_#t~ret11#1.base| 0)))) (= |ULTIMATE.start_create_#t~ret11#1.offset| 0) (= 0 |ULTIMATE.start_main_~shared~0#1.offset|) (= |ULTIMATE.start_create_#in~shared#1.offset| 0) (= |ULTIMATE.start_create_~now~1#1.offset| 0) (= |ULTIMATE.start_create_~sll~1#1.offset| 0))' at error location [2023-12-02 12:38:59,475 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:38:59,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:38:59,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2023-12-02 12:38:59,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182414704] [2023-12-02 12:38:59,475 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:38:59,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 12:38:59,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:38:59,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 12:38:59,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=4, NotChecked=54, Total=870 [2023-12-02 12:38:59,477 INFO L87 Difference]: Start difference. First operand 70 states and 80 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, (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 12:38:59,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:38:59,698 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2023-12-02 12:38:59,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 12:38:59,699 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, (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 24 [2023-12-02 12:38:59,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:38:59,700 INFO L225 Difference]: With dead ends: 76 [2023-12-02 12:38:59,700 INFO L226 Difference]: Without dead ends: 76 [2023-12-02 12:38:59,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=4, NotChecked=58, Total=992 [2023-12-02 12:38:59,701 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 12 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:38:59,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 165 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 221 Invalid, 0 Unknown, 64 Unchecked, 0.1s Time] [2023-12-02 12:38:59,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-12-02 12:38:59,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2023-12-02 12:38:59,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.5) internal successors, (75), 65 states have internal predecessors, (75), 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 12:38:59,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2023-12-02 12:38:59,703 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 24 [2023-12-02 12:38:59,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:38:59,704 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2023-12-02 12:38:59,704 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, (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 12:38:59,704 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2023-12-02 12:38:59,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 12:38:59,704 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:38:59,705 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] [2023-12-02 12:38:59,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-02 12:38:59,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 12:38:59,905 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-12-02 12:38:59,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:38:59,906 INFO L85 PathProgramCache]: Analyzing trace with hash 899246979, now seen corresponding path program 1 times [2023-12-02 12:38:59,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:38:59,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290201028] [2023-12-02 12:38:59,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:38:59,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:38:59,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:39:00,122 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 12:39:00,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:39:00,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290201028] [2023-12-02 12:39:00,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290201028] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:39:00,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851381980] [2023-12-02 12:39:00,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:39:00,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:39:00,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:39:00,124 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:39:00,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 12:39:00,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:39:00,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 12:39:00,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:39:00,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 12:39:00,382 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (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 12:39:00,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:39:00,400 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 12:39:00,410 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 12:39:00,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 12:39:00,428 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 12:39:00,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:39:00,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851381980] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:39:00,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1132171448] [2023-12-02 12:39:00,532 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-12-02 12:39:00,532 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:39:00,533 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:39:00,533 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:39:00,533 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:39:00,856 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 19 for LOIs [2023-12-02 12:39:00,864 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 104 for LOIs [2023-12-02 12:39:00,937 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:39:06,719 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2707#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_create_~shared#1.offset| 0) (<= (select |#length| |ULTIMATE.start_create_~now~1#1.base|) 7) (= |ULTIMATE.start_create_internal_#res#1.offset| 0) (= |ULTIMATE.start_create_#t~ret11#1.offset| 0) (= 0 |ULTIMATE.start_main_~shared~0#1.offset|) (or (and (exists ((|v_#valid_140| (Array Int Int))) (= (select |v_#valid_140| |ULTIMATE.start_create_internal_#res#1.base|) 0)) (<= (+ |ULTIMATE.start_create_~sll~1#1.base| 1) |#StackHeapBarrier|) (not (= |ULTIMATE.start_create_~sll~1#1.base| 0)) (= |ULTIMATE.start_create_#in~shared#1.base| |ULTIMATE.start_create_~shared#1.base|) (exists ((|v_#valid_141| (Array Int Int))) (and (= (select |v_#valid_141| |ULTIMATE.start_create_#t~ret11#1.base|) 0) (= (store |v_#valid_141| |ULTIMATE.start_create_#t~ret11#1.base| 1) |#valid|))) (<= (+ |ULTIMATE.start_create_internal_#res#1.base| 1) |#StackHeapBarrier|) (= |ULTIMATE.start_create_internal_#res#1.base| |ULTIMATE.start_main_~shared~0#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (= |ULTIMATE.start_create_#in~shared#1.base| |ULTIMATE.start_main_~shared~0#1.base|) (exists ((|v_#valid_142| (Array Int Int))) (= (select |v_#valid_142| |ULTIMATE.start_create_~sll~1#1.base|) 0)) (exists ((|v_ULTIMATE.start_create_#t~nondet10#1_13| Int)) (and (<= 0 (+ |v_ULTIMATE.start_create_#t~nondet10#1_13| 2147483648)) (not (= |v_ULTIMATE.start_create_#t~nondet10#1_13| 0)) (<= |v_ULTIMATE.start_create_#t~nondet10#1_13| 2147483647))) (<= (+ |ULTIMATE.start_create_#t~ret11#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#length_117| (Array Int Int))) (= |#length| (store |v_#length_117| |ULTIMATE.start_create_#t~ret11#1.base| 16))) (not (= |ULTIMATE.start_create_internal_#res#1.base| 0)) (exists ((|v_#memory_$Pointer$.offset_128| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_128| |ULTIMATE.start_create_#t~ret11#1.base| (store (store (select |v_#memory_$Pointer$.offset_128| |ULTIMATE.start_create_#t~ret11#1.base|) 0 0) 8 0)))) (exists ((|v_#memory_$Pointer$.base_126| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_126| |ULTIMATE.start_create_#t~ret11#1.base| (store (store (select |v_#memory_$Pointer$.base_126| |ULTIMATE.start_create_#t~ret11#1.base|) 0 0) 8 0)) |#memory_$Pointer$.base|)) (= |ULTIMATE.start_create_~now~1#1.base| |ULTIMATE.start_create_~sll~1#1.base|) (not (= |ULTIMATE.start_create_#t~ret11#1.base| 0))) (and (exists ((|v_#valid_140| (Array Int Int))) (= (select |v_#valid_140| |ULTIMATE.start_create_internal_#res#1.base|) 0)) (<= (+ |ULTIMATE.start_create_~sll~1#1.base| 1) |#StackHeapBarrier|) (not (= |ULTIMATE.start_create_~sll~1#1.base| 0)) (= |ULTIMATE.start_create_#in~shared#1.base| |ULTIMATE.start_create_~shared#1.base|) (exists ((|v_#valid_141| (Array Int Int))) (and (= (select |v_#valid_141| |ULTIMATE.start_create_#t~ret11#1.base|) 0) (= (store |v_#valid_141| |ULTIMATE.start_create_#t~ret11#1.base| 1) |#valid|))) (exists ((|v_#memory_$Pointer$.base_130| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_130| |ULTIMATE.start_create_#t~ret11#1.base| (store (store (select |v_#memory_$Pointer$.base_130| |ULTIMATE.start_create_#t~ret11#1.base|) 0 0) 8 0)))) (<= (+ |ULTIMATE.start_create_internal_#res#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#valid_143| (Array Int Int))) (= (select |v_#valid_143| |ULTIMATE.start_create_~sll~1#1.base|) 0)) (= |ULTIMATE.start_create_internal_#res#1.base| |ULTIMATE.start_main_~shared~0#1.base|) (exists ((|v_#memory_$Pointer$.offset_125| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_125| |ULTIMATE.start_create_#t~ret11#1.base| (store (store (select |v_#memory_$Pointer$.offset_125| |ULTIMATE.start_create_#t~ret11#1.base|) 0 0) 8 0)))) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (= |ULTIMATE.start_create_#in~shared#1.base| |ULTIMATE.start_main_~shared~0#1.base|) (exists ((|v_ULTIMATE.start_create_#t~nondet10#1_13| Int)) (and (<= 0 (+ |v_ULTIMATE.start_create_#t~nondet10#1_13| 2147483648)) (not (= |v_ULTIMATE.start_create_#t~nondet10#1_13| 0)) (<= |v_ULTIMATE.start_create_#t~nondet10#1_13| 2147483647))) (<= (+ |ULTIMATE.start_create_#t~ret11#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#length_118| (Array Int Int))) (= |#length| (store |v_#length_118| |ULTIMATE.start_create_#t~ret11#1.base| 16))) (not (= |ULTIMATE.start_create_internal_#res#1.base| 0)) (= |ULTIMATE.start_create_~now~1#1.base| |ULTIMATE.start_create_~sll~1#1.base|) (not (= |ULTIMATE.start_create_#t~ret11#1.base| 0)))) (= |ULTIMATE.start_create_#in~shared#1.offset| 0) (= |ULTIMATE.start_create_~now~1#1.offset| 0) (= |ULTIMATE.start_create_~sll~1#1.offset| 0))' at error location [2023-12-02 12:39:06,719 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:39:06,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:39:06,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-12-02 12:39:06,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262884133] [2023-12-02 12:39:06,720 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:39:06,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 12:39:06,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:39:06,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 12:39:06,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1072, Unknown=3, NotChecked=66, Total=1260 [2023-12-02 12:39:06,721 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand has 16 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 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 12:39:07,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:39:07,054 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2023-12-02 12:39:07,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 12:39:07,055 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 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 24 [2023-12-02 12:39:07,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:39:07,055 INFO L225 Difference]: With dead ends: 80 [2023-12-02 12:39:07,056 INFO L226 Difference]: Without dead ends: 80 [2023-12-02 12:39:07,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=153, Invalid=1330, Unknown=3, NotChecked=74, Total=1560 [2023-12-02 12:39:07,057 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 20 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:39:07,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 301 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 326 Invalid, 0 Unknown, 68 Unchecked, 0.2s Time] [2023-12-02 12:39:07,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-12-02 12:39:07,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2023-12-02 12:39:07,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 53 states have (on average 1.490566037735849) internal successors, (79), 68 states have internal predecessors, (79), 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 12:39:07,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 91 transitions. [2023-12-02 12:39:07,060 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 91 transitions. Word has length 24 [2023-12-02 12:39:07,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:39:07,060 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 91 transitions. [2023-12-02 12:39:07,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 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 12:39:07,060 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 91 transitions. [2023-12-02 12:39:07,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 12:39:07,061 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:39:07,061 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] [2023-12-02 12:39:07,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-02 12:39:07,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 12:39:07,262 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-12-02 12:39:07,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:39:07,262 INFO L85 PathProgramCache]: Analyzing trace with hash 888010628, now seen corresponding path program 1 times [2023-12-02 12:39:07,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:39:07,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095493471] [2023-12-02 12:39:07,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:39:07,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:39:07,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:39:07,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 12:39:07,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:39:07,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095493471] [2023-12-02 12:39:07,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095493471] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:39:07,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:39:07,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 12:39:07,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043472407] [2023-12-02 12:39:07,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:39:07,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 12:39:07,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:39:07,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 12:39:07,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:39:07,490 INFO L87 Difference]: Start difference. First operand 77 states and 91 transitions. Second operand has 7 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 12:39:07,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:39:07,621 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2023-12-02 12:39:07,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 12:39:07,621 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2023-12-02 12:39:07,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:39:07,622 INFO L225 Difference]: With dead ends: 76 [2023-12-02 12:39:07,622 INFO L226 Difference]: Without dead ends: 76 [2023-12-02 12:39:07,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-12-02 12:39:07,623 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:39:07,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 191 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:39:07,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-12-02 12:39:07,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2023-12-02 12:39:07,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 53 states have (on average 1.4528301886792452) internal successors, (77), 67 states have internal predecessors, (77), 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 12:39:07,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 89 transitions. [2023-12-02 12:39:07,627 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 89 transitions. Word has length 26 [2023-12-02 12:39:07,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:39:07,627 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 89 transitions. [2023-12-02 12:39:07,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 12:39:07,628 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 89 transitions. [2023-12-02 12:39:07,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 12:39:07,628 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:39:07,628 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] [2023-12-02 12:39:07,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-12-02 12:39:07,629 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-12-02 12:39:07,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:39:07,629 INFO L85 PathProgramCache]: Analyzing trace with hash 888010627, now seen corresponding path program 1 times [2023-12-02 12:39:07,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:39:07,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579275792] [2023-12-02 12:39:07,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:39:07,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:39:07,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:39:07,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:39:07,739 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:39:07,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579275792] [2023-12-02 12:39:07,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579275792] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:39:07,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:39:07,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 12:39:07,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832953906] [2023-12-02 12:39:07,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:39:07,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 12:39:07,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:39:07,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 12:39:07,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:39:07,741 INFO L87 Difference]: Start difference. First operand 76 states and 89 transitions. Second operand has 7 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 12:39:07,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:39:07,852 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2023-12-02 12:39:07,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 12:39:07,853 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2023-12-02 12:39:07,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:39:07,854 INFO L225 Difference]: With dead ends: 75 [2023-12-02 12:39:07,854 INFO L226 Difference]: Without dead ends: 75 [2023-12-02 12:39:07,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-12-02 12:39:07,855 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 5 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:39:07,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 175 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:39:07,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-12-02 12:39:07,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-12-02 12:39:07,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 53 states have (on average 1.4150943396226414) internal successors, (75), 66 states have internal predecessors, (75), 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 12:39:07,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2023-12-02 12:39:07,859 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 26 [2023-12-02 12:39:07,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:39:07,859 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2023-12-02 12:39:07,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 12:39:07,859 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2023-12-02 12:39:07,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 12:39:07,860 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:39:07,860 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 12:39:07,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-12-02 12:39:07,861 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-12-02 12:39:07,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:39:07,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1542715526, now seen corresponding path program 1 times [2023-12-02 12:39:07,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:39:07,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015514109] [2023-12-02 12:39:07,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:39:07,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:39:07,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:39:08,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:39:08,484 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:39:08,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015514109] [2023-12-02 12:39:08,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015514109] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:39:08,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951014839] [2023-12-02 12:39:08,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:39:08,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:39:08,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:39:08,486 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:39:08,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 12:39:08,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:39:08,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 60 conjunts are in the unsatisfiable core [2023-12-02 12:39:08,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:39:08,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 12:39:08,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 12:39:08,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 12:39:08,802 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 12:39:08,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 12:39:08,806 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 12:39:08,810 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 12:39:08,878 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 12:39:08,880 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 12:39:08,962 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:39:08,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-12-02 12:39:08,972 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:39:08,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-12-02 12:39:09,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:39:09,026 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:39:09,171 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_542 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_#t~ret9#1.base| v_ArrVal_542) |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0)) (forall ((v_ArrVal_543 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_#t~ret9#1.base| v_ArrVal_543) |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0))) is different from false [2023-12-02 12:39:09,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951014839] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:39:09,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1903381076] [2023-12-02 12:39:09,303 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 12:39:09,303 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:39:09,303 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:39:09,303 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:39:09,303 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:39:09,715 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 19 for LOIs [2023-12-02 12:39:09,722 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 49 for LOIs [2023-12-02 12:39:09,743 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:39:12,625 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3359#(and (not (= (select |#valid| |ULTIMATE.start_destroy_internal_~l#1.base|) 1)) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~l~0#1.offset| 0) (= |ULTIMATE.start_create_internal_#res#1.offset| 0) (= |ULTIMATE.start_create_#res#1.offset| 0) (= 0 |ULTIMATE.start_main_~shared~0#1.offset|) (or (not (= |ULTIMATE.start_destroy_internal_~l#1.offset| 0)) (not (= |ULTIMATE.start_destroy_internal_~l#1.base| 0))) (= |ULTIMATE.start_destroy_internal_#in~l#1.offset| 0))' at error location [2023-12-02 12:39:12,625 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:39:12,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:39:12,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 27 [2023-12-02 12:39:12,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545474259] [2023-12-02 12:39:12,626 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:39:12,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-02 12:39:12,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:39:12,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-02 12:39:12,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2481, Unknown=23, NotChecked=100, Total=2756 [2023-12-02 12:39:12,628 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand has 27 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 22 states have internal predecessors, (37), 3 states have call successors, (3), 2 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 12:39:13,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:39:13,525 INFO L93 Difference]: Finished difference Result 92 states and 106 transitions. [2023-12-02 12:39:13,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-02 12:39:13,526 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 22 states have internal predecessors, (37), 3 states have call successors, (3), 2 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 12:39:13,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:39:13,527 INFO L225 Difference]: With dead ends: 92 [2023-12-02 12:39:13,527 INFO L226 Difference]: Without dead ends: 92 [2023-12-02 12:39:13,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=228, Invalid=3653, Unknown=29, NotChecked=122, Total=4032 [2023-12-02 12:39:13,528 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 57 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:39:13,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 537 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 12:39:13,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-12-02 12:39:13,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 78. [2023-12-02 12:39:13,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 56 states have (on average 1.3928571428571428) internal successors, (78), 69 states have internal predecessors, (78), 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 12:39:13,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2023-12-02 12:39:13,532 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 26 [2023-12-02 12:39:13,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:39:13,532 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2023-12-02 12:39:13,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 22 states have internal predecessors, (37), 3 states have call successors, (3), 2 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 12:39:13,533 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2023-12-02 12:39:13,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 12:39:13,533 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:39:13,533 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 12:39:13,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 12:39:13,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:39:13,734 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-12-02 12:39:13,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:39:13,735 INFO L85 PathProgramCache]: Analyzing trace with hash -579469176, now seen corresponding path program 1 times [2023-12-02 12:39:13,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:39:13,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563300216] [2023-12-02 12:39:13,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:39:13,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:39:13,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:39:14,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:39:14,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:39:14,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563300216] [2023-12-02 12:39:14,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563300216] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:39:14,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534261976] [2023-12-02 12:39:14,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:39:14,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:39:14,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:39:14,009 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:39:14,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 12:39:14,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:39:14,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-02 12:39:14,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:39:14,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 12:39:14,230 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-12-02 12:39:14,231 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 12:39:14,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 12 [2023-12-02 12:39:14,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:39:14,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:39:14,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:39:14,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534261976] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:39:14,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1891983286] [2023-12-02 12:39:14,702 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-12-02 12:39:14,702 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:39:14,702 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:39:14,702 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:39:14,702 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:39:15,276 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 19 for LOIs [2023-12-02 12:39:15,284 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 49 for LOIs [2023-12-02 12:39:15,309 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:39:17,945 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3758#(and (<= 1 |#StackHeapBarrier|) (not (= |ULTIMATE.start_destroy_~l#1.base| 0)) (= |ULTIMATE.start_main_~l~0#1.offset| 0) (= |ULTIMATE.start_create_internal_#res#1.offset| 0) (= |ULTIMATE.start_create_#res#1.offset| 0) (= |ULTIMATE.start_main_~l~0#1.base| |ULTIMATE.start_destroy_#in~l#1.base|) (= |ULTIMATE.start_destroy_~l#1.offset| 0) (= 0 |ULTIMATE.start_main_~shared~0#1.offset|) (not (= (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))' at error location [2023-12-02 12:39:17,945 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:39:17,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:39:17,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 28 [2023-12-02 12:39:17,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892675744] [2023-12-02 12:39:17,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:39:17,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-02 12:39:17,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:39:17,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-02 12:39:17,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2574, Unknown=0, NotChecked=0, Total=2756 [2023-12-02 12:39:17,948 INFO L87 Difference]: Start difference. First operand 78 states and 90 transitions. Second operand has 29 states, 21 states have (on average 2.238095238095238) internal successors, (47), 23 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 12:39:18,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:39:18,598 INFO L93 Difference]: Finished difference Result 124 states and 139 transitions. [2023-12-02 12:39:18,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-02 12:39:18,599 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 21 states have (on average 2.238095238095238) internal successors, (47), 23 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 27 [2023-12-02 12:39:18,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:39:18,600 INFO L225 Difference]: With dead ends: 124 [2023-12-02 12:39:18,600 INFO L226 Difference]: Without dead ends: 124 [2023-12-02 12:39:18,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=244, Invalid=3538, Unknown=0, NotChecked=0, Total=3782 [2023-12-02 12:39:18,602 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 108 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:39:18,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 286 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 12:39:18,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-12-02 12:39:18,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 81. [2023-12-02 12:39:18,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 60 states have (on average 1.4) internal successors, (84), 72 states have internal predecessors, (84), 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 12:39:18,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2023-12-02 12:39:18,606 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 27 [2023-12-02 12:39:18,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:39:18,606 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2023-12-02 12:39:18,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 21 states have (on average 2.238095238095238) internal successors, (47), 23 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 12:39:18,607 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2023-12-02 12:39:18,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 12:39:18,607 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:39:18,607 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 12:39:18,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-02 12:39:18,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:39:18,808 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-12-02 12:39:18,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:39:18,808 INFO L85 PathProgramCache]: Analyzing trace with hash -579469175, now seen corresponding path program 1 times [2023-12-02 12:39:18,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:39:18,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248696888] [2023-12-02 12:39:18,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:39:18,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:39:18,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:39:18,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 12:39:18,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:39:18,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248696888] [2023-12-02 12:39:18,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248696888] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:39:18,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:39:18,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 12:39:18,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768905965] [2023-12-02 12:39:18,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:39:18,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 12:39:18,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:39:18,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 12:39:18,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 12:39:18,984 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand has 8 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 12:39:19,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:39:19,128 INFO L93 Difference]: Finished difference Result 117 states and 138 transitions. [2023-12-02 12:39:19,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 12:39:19,129 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2023-12-02 12:39:19,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:39:19,130 INFO L225 Difference]: With dead ends: 117 [2023-12-02 12:39:19,130 INFO L226 Difference]: Without dead ends: 117 [2023-12-02 12:39:19,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 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 12:39:19,131 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 30 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:39:19,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 192 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:39:19,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-12-02 12:39:19,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2023-12-02 12:39:19,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 77 states have (on average 1.4545454545454546) internal successors, (112), 89 states have internal predecessors, (112), 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 12:39:19,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 124 transitions. [2023-12-02 12:39:19,136 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 124 transitions. Word has length 27 [2023-12-02 12:39:19,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:39:19,136 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 124 transitions. [2023-12-02 12:39:19,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 12:39:19,137 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 124 transitions. [2023-12-02 12:39:19,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 12:39:19,137 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:39:19,137 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 12:39:19,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-12-02 12:39:19,138 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-12-02 12:39:19,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:39:19,138 INFO L85 PathProgramCache]: Analyzing trace with hash -579467643, now seen corresponding path program 1 times [2023-12-02 12:39:19,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:39:19,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238591880] [2023-12-02 12:39:19,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:39:19,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:39:19,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:39:19,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 12:39:19,223 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:39:19,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238591880] [2023-12-02 12:39:19,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238591880] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:39:19,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:39:19,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 12:39:19,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878331210] [2023-12-02 12:39:19,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:39:19,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 12:39:19,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:39:19,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 12:39:19,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 12:39:19,224 INFO L87 Difference]: Start difference. First operand 98 states and 124 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 12:39:19,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:39:19,321 INFO L93 Difference]: Finished difference Result 107 states and 130 transitions. [2023-12-02 12:39:19,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 12:39:19,322 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), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2023-12-02 12:39:19,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:39:19,323 INFO L225 Difference]: With dead ends: 107 [2023-12-02 12:39:19,323 INFO L226 Difference]: Without dead ends: 107 [2023-12-02 12:39:19,324 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 12:39:19,324 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 40 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:39:19,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 230 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:39:19,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-12-02 12:39:19,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 99. [2023-12-02 12:39:19,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 78 states have (on average 1.4102564102564104) internal successors, (110), 90 states have internal predecessors, (110), 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 12:39:19,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 122 transitions. [2023-12-02 12:39:19,329 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 122 transitions. Word has length 27 [2023-12-02 12:39:19,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:39:19,330 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 122 transitions. [2023-12-02 12:39:19,330 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), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 12:39:19,330 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 122 transitions. [2023-12-02 12:39:19,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 12:39:19,330 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:39:19,330 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] [2023-12-02 12:39:19,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-12-02 12:39:19,331 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-12-02 12:39:19,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:39:19,331 INFO L85 PathProgramCache]: Analyzing trace with hash 887991768, now seen corresponding path program 1 times [2023-12-02 12:39:19,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:39:19,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771327268] [2023-12-02 12:39:19,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:39:19,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:39:19,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:39:19,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 12:39:19,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:39:19,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771327268] [2023-12-02 12:39:19,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771327268] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:39:19,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314801265] [2023-12-02 12:39:19,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:39:19,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:39:19,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:39:19,652 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:39:19,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 12:39:19,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:39:19,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 43 conjunts are in the unsatisfiable core [2023-12-02 12:39:19,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:39:19,920 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (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 12:39:19,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:39:19,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:39:19,940 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 12:39:19,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 12:39:19,962 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 12:39:19,962 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:39:20,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314801265] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:39:20,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1860064824] [2023-12-02 12:39:20,080 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 12:39:20,080 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:39:20,080 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:39:20,081 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:39:20,081 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:39:20,780 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 22 for LOIs [2023-12-02 12:39:20,792 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 16 for LOIs [2023-12-02 12:39:20,802 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:39:23,858 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4580#(and (= |ULTIMATE.start_destroy_internal_#in~l#1.base| |ULTIMATE.start_main_~shared~0#1.base|) (not (= |ULTIMATE.start_create_#res#1.base| 0)) (<= 1 |#StackHeapBarrier|) (<= (select |#length| |ULTIMATE.start_destroy_internal_~l#1.base|) 7) (= |ULTIMATE.start_main_~l~0#1.offset| 0) (exists ((|v_#memory_$Pointer$.offset_185| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_185| |ULTIMATE.start_create_#res#1.base| (store (store (select |v_#memory_$Pointer$.offset_185| |ULTIMATE.start_create_#res#1.base|) 0 0) 8 0)))) (= |ULTIMATE.start_create_internal_#res#1.offset| 0) (= |ULTIMATE.start_create_#res#1.offset| 0) (= |ULTIMATE.start_create_internal_#res#1.base| |ULTIMATE.start_main_~shared~0#1.base|) (= 0 |ULTIMATE.start_main_~shared~0#1.offset|) (exists ((|v_#memory_$Pointer$.base_186| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_186| |ULTIMATE.start_create_#res#1.base| (store (store (select |v_#memory_$Pointer$.base_186| |ULTIMATE.start_create_#res#1.base|) 0 0) 8 |ULTIMATE.start_main_~shared~0#1.base|)) |#memory_$Pointer$.base|)) (= |ULTIMATE.start_destroy_internal_~l#1.offset| 0) (= |ULTIMATE.start_destroy_internal_~l#1.base| |ULTIMATE.start_destroy_internal_#in~l#1.base|) (exists ((|v_#length_153| (Array Int Int))) (= |#length| (store |v_#length_153| |ULTIMATE.start_create_#res#1.base| 16))) (= |ULTIMATE.start_main_~l~0#1.base| |ULTIMATE.start_create_#res#1.base|) (exists ((|v_#valid_195| (Array Int Int))) (and (= (select |v_#valid_195| |ULTIMATE.start_create_#res#1.base|) 0) (= |#valid| (store |v_#valid_195| |ULTIMATE.start_create_#res#1.base| 1)))) (not (= |ULTIMATE.start_destroy_internal_~l#1.base| 0)) (= |ULTIMATE.start_destroy_internal_#in~l#1.offset| 0) (<= (+ |ULTIMATE.start_create_#res#1.base| 1) |#StackHeapBarrier|))' at error location [2023-12-02 12:39:23,858 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:39:23,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:39:23,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 18 [2023-12-02 12:39:23,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646100665] [2023-12-02 12:39:23,859 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:39:23,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 12:39:23,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:39:23,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 12:39:23,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1595, Unknown=2, NotChecked=80, Total=1806 [2023-12-02 12:39:23,860 INFO L87 Difference]: Start difference. First operand 99 states and 122 transitions. Second operand has 19 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 17 states have internal predecessors, (36), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 12:39:24,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:39:24,295 INFO L93 Difference]: Finished difference Result 144 states and 176 transitions. [2023-12-02 12:39:24,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 12:39:24,295 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 17 states have internal predecessors, (36), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 29 [2023-12-02 12:39:24,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:39:24,296 INFO L225 Difference]: With dead ends: 144 [2023-12-02 12:39:24,296 INFO L226 Difference]: Without dead ends: 144 [2023-12-02 12:39:24,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=157, Invalid=1915, Unknown=2, NotChecked=88, Total=2162 [2023-12-02 12:39:24,298 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 36 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:39:24,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 604 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 583 Invalid, 0 Unknown, 103 Unchecked, 0.3s Time] [2023-12-02 12:39:24,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-12-02 12:39:24,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 114. [2023-12-02 12:39:24,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 91 states have (on average 1.3736263736263736) internal successors, (125), 103 states have internal predecessors, (125), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 12:39:24,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 141 transitions. [2023-12-02 12:39:24,303 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 141 transitions. Word has length 29 [2023-12-02 12:39:24,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:39:24,304 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 141 transitions. [2023-12-02 12:39:24,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 17 states have internal predecessors, (36), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 12:39:24,304 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 141 transitions. [2023-12-02 12:39:24,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 12:39:24,304 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:39:24,304 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 12:39:24,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 12:39:24,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:39:24,505 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-12-02 12:39:24,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:39:24,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1475913362, now seen corresponding path program 1 times [2023-12-02 12:39:24,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:39:24,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837832803] [2023-12-02 12:39:24,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:39:24,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:39:24,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:39:24,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 12:39:24,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:39:24,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837832803] [2023-12-02 12:39:24,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837832803] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:39:24,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:39:24,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 12:39:24,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036883960] [2023-12-02 12:39:24,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:39:24,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 12:39:24,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:39:24,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 12:39:24,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 12:39:24,619 INFO L87 Difference]: Start difference. First operand 114 states and 141 transitions. Second operand has 8 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 12:39:24,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:39:24,743 INFO L93 Difference]: Finished difference Result 120 states and 147 transitions. [2023-12-02 12:39:24,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 12:39:24,744 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2023-12-02 12:39:24,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:39:24,745 INFO L225 Difference]: With dead ends: 120 [2023-12-02 12:39:24,745 INFO L226 Difference]: Without dead ends: 120 [2023-12-02 12:39:24,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-02 12:39:24,745 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 34 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:39:24,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 190 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:39:24,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-12-02 12:39:24,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2023-12-02 12:39:24,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 94 states have (on average 1.3936170212765957) internal successors, (131), 106 states have internal predecessors, (131), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 12:39:24,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 147 transitions. [2023-12-02 12:39:24,750 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 147 transitions. Word has length 29 [2023-12-02 12:39:24,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:39:24,751 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 147 transitions. [2023-12-02 12:39:24,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 4.166666666666667) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 12:39:24,751 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 147 transitions. [2023-12-02 12:39:24,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 12:39:24,752 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:39:24,752 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 12:39:24,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-12-02 12:39:24,752 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-12-02 12:39:24,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:39:24,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1656647488, now seen corresponding path program 1 times [2023-12-02 12:39:24,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:39:24,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804465813] [2023-12-02 12:39:24,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:39:24,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:39:24,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:39:25,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:39:25,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:39:25,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804465813] [2023-12-02 12:39:25,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804465813] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:39:25,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083001169] [2023-12-02 12:39:25,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:39:25,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:39:25,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:39:25,232 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:39:25,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 12:39:25,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:39:25,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 69 conjunts are in the unsatisfiable core [2023-12-02 12:39:25,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:39:25,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 12:39:25,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 12:39:25,573 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-12-02 12:39:25,574 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 12:39:25,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:39:25,714 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 12:39:25,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-12-02 12:39:25,735 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-12-02 12:39:25,736 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 12:39:25,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 12:39:25,819 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 17 treesize of output 9 [2023-12-02 12:39:25,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 12:39:25,836 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:39:25,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083001169] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:39:25,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [141256309] [2023-12-02 12:39:25,983 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-12-02 12:39:25,983 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:39:25,983 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:39:25,983 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:39:25,983 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:39:39,091 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 19 for LOIs [2023-12-02 12:39:39,097 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 51 for LOIs [2023-12-02 12:39:39,128 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:39:43,389 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5270#(and (= |ULTIMATE.start_main_~l~0#1.offset| |ULTIMATE.start_create_#res#1.offset|) (= |ULTIMATE.start_destroy_internal_#in~l#1.base| |ULTIMATE.start_main_~shared~0#1.base|) (or (and (not (= |ULTIMATE.start_create_#res#1.base| 0)) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_create_internal_#res#1.offset| 0) (exists ((|v_#valid_206| (Array Int Int))) (= (select |v_#valid_206| |ULTIMATE.start_create_internal_#res#1.base|) 0)) (= |ULTIMATE.start_create_#res#1.offset| 0) (exists ((|v_#memory_$Pointer$.base_201| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_201| |ULTIMATE.start_create_#res#1.base| (store (store (select |v_#memory_$Pointer$.base_201| |ULTIMATE.start_create_#res#1.base|) 0 0) 8 |ULTIMATE.start_main_~shared~0#1.base|)))) (exists ((|v_#length_166| (Array Int Int))) (= (store |v_#length_166| |ULTIMATE.start_create_#res#1.base| 16) |#length|)) (<= (+ |ULTIMATE.start_create_internal_#res#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.offset_199| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.offset_199| |ULTIMATE.start_create_#res#1.base| (store (store (select |v_#memory_$Pointer$.offset_199| |ULTIMATE.start_create_#res#1.base|) 0 0) 8 0)) |#memory_$Pointer$.offset|)) (= |ULTIMATE.start_create_internal_#res#1.base| |ULTIMATE.start_main_~shared~0#1.base|) (= 0 |ULTIMATE.start_main_~shared~0#1.offset|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (exists ((|v_#valid_207| (Array Int Int))) (and (= (select |v_#valid_207| |ULTIMATE.start_create_#res#1.base|) 0) (= (store |v_#valid_207| |ULTIMATE.start_create_#res#1.base| 1) |#valid|))) (<= (+ |ULTIMATE.start_create_#res#1.base| 1) |#StackHeapBarrier|)) (exists ((|v_ULTIMATE.start_create_~now~1#1.offset_37| Int) (|v_#memory_$Pointer$.offset_209| (Array Int (Array Int Int))) (|v_ULTIMATE.start_create_#in~shared#1.offset_15| Int) (|v_ULTIMATE.start_create_#t~mem12#1.offset_23| Int) (|v_#memory_$Pointer$.base_211| (Array Int (Array Int Int))) (|v_ULTIMATE.start_create_#t~mem12#1.base_24| Int) (|v_ULTIMATE.start_create_~now~1#1.base_41| Int)) (and (<= (+ 8 |v_ULTIMATE.start_create_~now~1#1.offset_37|) (select |#length| |v_ULTIMATE.start_create_~now~1#1.base_41|)) (= (select |#valid| |v_ULTIMATE.start_create_~now~1#1.base_41|) 1) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_create_internal_#res#1.offset| 0) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_209| |v_ULTIMATE.start_create_#t~mem12#1.base_24| (store (select |v_#memory_$Pointer$.offset_209| |v_ULTIMATE.start_create_#t~mem12#1.base_24|) (+ |v_ULTIMATE.start_create_#t~mem12#1.offset_23| 8) 0))) (= |ULTIMATE.start_create_#res#1.offset| 0) (<= (+ |v_ULTIMATE.start_create_#t~mem12#1.offset_23| 16) (select |#length| |v_ULTIMATE.start_create_#t~mem12#1.base_24|)) (= (select |#valid| |v_ULTIMATE.start_create_#t~mem12#1.base_24|) 1) (= 0 |ULTIMATE.start_main_~shared~0#1.offset|) (<= 0 |v_ULTIMATE.start_create_~now~1#1.offset_37|) (= (store |v_#memory_$Pointer$.base_211| |v_ULTIMATE.start_create_#t~mem12#1.base_24| (store (select |v_#memory_$Pointer$.base_211| |v_ULTIMATE.start_create_#t~mem12#1.base_24|) (+ |v_ULTIMATE.start_create_#t~mem12#1.offset_23| 8) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_#t~mem12#1.base_24|) (+ |v_ULTIMATE.start_create_#t~mem12#1.offset_23| 8)))) |#memory_$Pointer$.base|) (= |v_ULTIMATE.start_create_#in~shared#1.offset_15| 0) (<= 0 (+ |v_ULTIMATE.start_create_#t~mem12#1.offset_23| 8))))) (= |ULTIMATE.start_destroy_internal_#in~l#1.offset| |ULTIMATE.start_main_~shared~0#1.offset|) (= |ULTIMATE.start_destroy_internal_#in~l#1.offset| |ULTIMATE.start_destroy_internal_~l#1.offset|) (<= (select |#length| |ULTIMATE.start_destroy_internal_~l#1.base|) (+ 7 |ULTIMATE.start_destroy_internal_~l#1.offset|)) (= |ULTIMATE.start_destroy_internal_~l#1.base| |ULTIMATE.start_destroy_internal_#in~l#1.base|) (= |ULTIMATE.start_main_~l~0#1.base| |ULTIMATE.start_create_#res#1.base|) (not (= |ULTIMATE.start_destroy_internal_~l#1.base| 0)))' at error location [2023-12-02 12:39:43,389 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:39:43,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:39:43,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 26 [2023-12-02 12:39:43,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707354522] [2023-12-02 12:39:43,390 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:39:43,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-02 12:39:43,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:39:43,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-02 12:39:43,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=2561, Unknown=3, NotChecked=0, Total=2756 [2023-12-02 12:39:43,392 INFO L87 Difference]: Start difference. First operand 117 states and 147 transitions. Second operand has 27 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 21 states have internal predecessors, (41), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 12:39:44,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:39:44,150 INFO L93 Difference]: Finished difference Result 169 states and 208 transitions. [2023-12-02 12:39:44,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 12:39:44,150 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 21 states have internal predecessors, (41), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 32 [2023-12-02 12:39:44,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:39:44,152 INFO L225 Difference]: With dead ends: 169 [2023-12-02 12:39:44,152 INFO L226 Difference]: Without dead ends: 169 [2023-12-02 12:39:44,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=256, Invalid=3281, Unknown=3, NotChecked=0, Total=3540 [2023-12-02 12:39:44,154 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 71 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:39:44,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 326 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 12:39:44,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-12-02 12:39:44,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 133. [2023-12-02 12:39:44,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 108 states have (on average 1.3888888888888888) internal successors, (150), 120 states have internal predecessors, (150), 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 12:39:44,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 170 transitions. [2023-12-02 12:39:44,159 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 170 transitions. Word has length 32 [2023-12-02 12:39:44,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:39:44,159 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 170 transitions. [2023-12-02 12:39:44,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 21 states have internal predecessors, (41), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 12:39:44,160 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 170 transitions. [2023-12-02 12:39:44,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 12:39:44,160 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:39:44,160 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, 1, 1, 1, 1, 1, 1] [2023-12-02 12:39:44,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 12:39:44,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:39:44,361 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-12-02 12:39:44,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:39:44,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1354903844, now seen corresponding path program 1 times [2023-12-02 12:39:44,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:39:44,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860263935] [2023-12-02 12:39:44,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:39:44,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:39:44,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:39:44,768 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 12:39:44,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:39:44,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860263935] [2023-12-02 12:39:44,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860263935] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:39:44,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100482073] [2023-12-02 12:39:44,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:39:44,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:39:44,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:39:44,769 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:39:44,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 12:39:44,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:39:44,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 51 conjunts are in the unsatisfiable core [2023-12-02 12:39:44,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:39:44,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 12:39:44,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 12:39:44,944 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 12:39:44,950 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 12:39:45,052 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:39:45,052 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 1 case distinctions, treesize of input 30 treesize of output 14 [2023-12-02 12:39:45,057 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 12:39:45,163 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:39:45,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-12-02 12:39:45,171 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:39:45,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-12-02 12:39:45,218 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 12:39:45,218 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:39:45,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-12-02 12:39:45,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 46 [2023-12-02 12:39:45,606 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 12:39:45,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100482073] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:39:45,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2058946655] [2023-12-02 12:39:45,608 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2023-12-02 12:39:45,608 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:39:45,609 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:39:45,609 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:39:45,609 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:39:46,188 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 19 for LOIs [2023-12-02 12:39:46,193 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 51 for LOIs [2023-12-02 12:39:46,211 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:39:52,315 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5819#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~l~0#1.offset| 0) (= |ULTIMATE.start_create_internal_#res#1.offset| 0) (= |ULTIMATE.start_create_#res#1.offset| 0) (= 0 |ULTIMATE.start_main_~shared~0#1.offset|) (not (= (select |#valid| |ULTIMATE.start_destroy_~l#1.base|) 1)) (= |ULTIMATE.start_destroy_#in~l#1.offset| 0))' at error location [2023-12-02 12:39:52,315 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:39:52,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:39:52,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 24 [2023-12-02 12:39:52,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807004106] [2023-12-02 12:39:52,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:39:52,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-02 12:39:52,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:39:52,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-02 12:39:52,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2388, Unknown=6, NotChecked=0, Total=2550 [2023-12-02 12:39:52,319 INFO L87 Difference]: Start difference. First operand 133 states and 170 transitions. Second operand has 24 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 12:39:53,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:39:53,331 INFO L93 Difference]: Finished difference Result 143 states and 174 transitions. [2023-12-02 12:39:53,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 12:39:53,331 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 32 [2023-12-02 12:39:53,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:39:53,332 INFO L225 Difference]: With dead ends: 143 [2023-12-02 12:39:53,332 INFO L226 Difference]: Without dead ends: 143 [2023-12-02 12:39:53,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=213, Invalid=3085, Unknown=8, NotChecked=0, Total=3306 [2023-12-02 12:39:53,334 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 43 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 12:39:53,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 706 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 12:39:53,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-12-02 12:39:53,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 136. [2023-12-02 12:39:53,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 111 states have (on average 1.3783783783783783) internal successors, (153), 123 states have internal predecessors, (153), 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 12:39:53,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 173 transitions. [2023-12-02 12:39:53,338 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 173 transitions. Word has length 32 [2023-12-02 12:39:53,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:39:53,339 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 173 transitions. [2023-12-02 12:39:53,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 12:39:53,339 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 173 transitions. [2023-12-02 12:39:53,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 12:39:53,339 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:39:53,339 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, 1] [2023-12-02 12:39:53,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-02 12:39:53,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-02 12:39:53,540 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-12-02 12:39:53,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:39:53,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1354905377, now seen corresponding path program 1 times [2023-12-02 12:39:53,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:39:53,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910918805] [2023-12-02 12:39:53,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:39:53,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:39:53,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:39:54,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:39:54,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:39:54,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910918805] [2023-12-02 12:39:54,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910918805] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:39:54,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969542894] [2023-12-02 12:39:54,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:39:54,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:39:54,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:39:54,118 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:39:54,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 12:39:54,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:39:54,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 48 conjunts are in the unsatisfiable core [2023-12-02 12:39:54,260 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:39:54,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 16 treesize of output 31 [2023-12-02 12:39:54,768 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_destroy_internal_~l#1.base_41| Int)) (and (= (store (store |c_#valid| |v_ULTIMATE.start_destroy_internal_~l#1.base_41| 1) |c_ULTIMATE.start_main_~l~0#1.base| 0) (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_destroy_internal_~l#1.base_41| 1)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_destroy_internal_~l#1.base_41|) 0) (= (select |c_#valid| |v_ULTIMATE.start_destroy_internal_~l#1.base_41|) 0))) is different from true [2023-12-02 12:39:54,780 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_destroy_internal_~l#1.base_41| Int)) (and (= (store (store |c_#valid| |v_ULTIMATE.start_destroy_internal_~l#1.base_41| 1) |c_ULTIMATE.start_destroy_~l#1.base| 0) (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_destroy_internal_~l#1.base_41| 1)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_destroy_internal_~l#1.base_41|) 0) (= (select |c_#valid| |v_ULTIMATE.start_destroy_internal_~l#1.base_41|) 0))) is different from true [2023-12-02 12:39:54,835 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 12:39:54,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 39 [2023-12-02 12:39:54,848 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_destroy_internal_~l#1.base_41| Int) (|v_ULTIMATE.start_destroy_~l#1.base_29| Int)) (and (= (store (store |c_#valid| |v_ULTIMATE.start_destroy_internal_~l#1.base_41| 1) |v_ULTIMATE.start_destroy_~l#1.base_29| 0) (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_destroy_internal_~l#1.base_41| 1)) (= 0 (select |c_#valid| |v_ULTIMATE.start_destroy_~l#1.base_29|)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_destroy_internal_~l#1.base_41|) 0) (= (select |c_#valid| |v_ULTIMATE.start_destroy_internal_~l#1.base_41|) 0))) is different from true [2023-12-02 12:39:54,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-02 12:39:54,867 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:39:55,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969542894] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:39:55,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1003481465] [2023-12-02 12:39:55,156 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2023-12-02 12:39:55,156 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:39:55,157 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:39:55,157 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:39:55,157 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:39:55,757 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 19 for LOIs [2023-12-02 12:39:55,763 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 47 for LOIs [2023-12-02 12:39:55,786 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:39:55,790 WARN L876 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_create_#res#1.offset| 0) (= |c_ULTIMATE.start_create_internal_#res#1.offset| 0) (<= 1 |c_#StackHeapBarrier|) (or (exists ((|v_#valid_253| (Array Int Int)) (|v_ULTIMATE.start_destroy_~l#1.base_34| Int)) (and (<= (+ |v_ULTIMATE.start_destroy_~l#1.base_34| 1) |c_#StackHeapBarrier|) (or (= (select |v_#valid_253| |v_ULTIMATE.start_destroy_~l#1.base_34|) 1) (= |v_ULTIMATE.start_destroy_~l#1.base_34| 0)) (= |c_#valid| (store |v_#valid_253| |v_ULTIMATE.start_destroy_~l#1.base_34| 0)))) (= |c_ULTIMATE.start_main_~l~0#1.base| 0)) (= |c_ULTIMATE.start_main_~l~0#1.offset| 0) (= |c_ULTIMATE.start_main_#res#1| 0) (= |c_ULTIMATE.start_main_~shared~0#1.offset| 0) (not (= |c_#valid| |c_ULTIMATE.start_main_old_#valid#1|))) is different from true [2023-12-02 12:40:07,211 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6322#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~l~0#1.offset| 0) (= |ULTIMATE.start_create_internal_#res#1.offset| 0) (or (exists ((|v_#valid_253| (Array Int Int)) (|v_ULTIMATE.start_destroy_~l#1.base_34| Int)) (and (or (= (select |v_#valid_253| |v_ULTIMATE.start_destroy_~l#1.base_34|) 1) (= |v_ULTIMATE.start_destroy_~l#1.base_34| 0)) (<= (+ |v_ULTIMATE.start_destroy_~l#1.base_34| 1) |#StackHeapBarrier|) (= (store |v_#valid_253| |v_ULTIMATE.start_destroy_~l#1.base_34| 0) |#valid|))) (= |ULTIMATE.start_main_~l~0#1.base| 0)) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (= |ULTIMATE.start_create_#res#1.offset| 0) (= 0 |ULTIMATE.start_main_~shared~0#1.offset|) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2023-12-02 12:40:07,211 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:40:07,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:40:07,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2023-12-02 12:40:07,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963587532] [2023-12-02 12:40:07,212 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:40:07,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-02 12:40:07,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:40:07,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-02 12:40:07,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=3033, Unknown=9, NotChecked=452, Total=3660 [2023-12-02 12:40:07,214 INFO L87 Difference]: Start difference. First operand 136 states and 173 transitions. Second operand has 28 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 3 states have call successors, (3), 1 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 12:40:08,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:40:08,676 INFO L93 Difference]: Finished difference Result 143 states and 179 transitions. [2023-12-02 12:40:08,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 12:40:08,676 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 3 states have call successors, (3), 1 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 32 [2023-12-02 12:40:08,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:40:08,677 INFO L225 Difference]: With dead ends: 143 [2023-12-02 12:40:08,677 INFO L226 Difference]: Without dead ends: 129 [2023-12-02 12:40:08,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=191, Invalid=3598, Unknown=9, NotChecked=492, Total=4290 [2023-12-02 12:40:08,679 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 13 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 244 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:40:08,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 345 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 759 Invalid, 0 Unknown, 244 Unchecked, 1.1s Time] [2023-12-02 12:40:08,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-12-02 12:40:08,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-12-02 12:40:08,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 104 states have (on average 1.3942307692307692) internal successors, (145), 116 states have internal predecessors, (145), 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 12:40:08,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 165 transitions. [2023-12-02 12:40:08,683 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 165 transitions. Word has length 32 [2023-12-02 12:40:08,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:40:08,683 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 165 transitions. [2023-12-02 12:40:08,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 3 states have call successors, (3), 1 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 12:40:08,684 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 165 transitions. [2023-12-02 12:40:08,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-02 12:40:08,684 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:40:08,684 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:40:08,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 12:40:08,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-02 12:40:08,885 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-12-02 12:40:08,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:40:08,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1749859558, now seen corresponding path program 1 times [2023-12-02 12:40:08,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:40:08,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97008384] [2023-12-02 12:40:08,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:40:08,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:40:08,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:40:09,523 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 12:40:09,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:40:09,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97008384] [2023-12-02 12:40:09,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97008384] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:40:09,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884236750] [2023-12-02 12:40:09,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:40:09,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:40:09,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:40:09,525 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:40:09,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 12:40:09,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:40:09,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-02 12:40:09,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:40:09,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 12:40:09,809 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-12-02 12:40:09,810 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 12:40:09,883 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 12:40:10,014 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 12:40:10,014 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2023-12-02 12:40:10,026 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 25 treesize of output 13 [2023-12-02 12:40:10,132 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_~pi~0.base (select |c_#valid| alloc_and_zero_~pi~0.base))))) is different from true [2023-12-02 12:40:10,210 INFO L349 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2023-12-02 12:40:10,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 28 [2023-12-02 12:40:10,222 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2023-12-02 12:40:10,222 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:40:10,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884236750] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:40:10,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1951935372] [2023-12-02 12:40:10,326 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-12-02 12:40:10,326 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:40:10,327 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:40:10,327 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:40:10,327 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:40:23,350 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 19 for LOIs [2023-12-02 12:40:23,358 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 49 for LOIs [2023-12-02 12:40:23,390 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:40:28,108 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6764#(and (not (= (select |#valid| |ULTIMATE.start_create_~now~1#1.base|) 1)) (= |ULTIMATE.start_create_#t~ret11#1.offset| 0))' at error location [2023-12-02 12:40:28,108 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:40:28,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:40:28,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 22 [2023-12-02 12:40:28,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915776830] [2023-12-02 12:40:28,108 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:40:28,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-02 12:40:28,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:40:28,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-02 12:40:28,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1731, Unknown=1, NotChecked=84, Total=1980 [2023-12-02 12:40:28,110 INFO L87 Difference]: Start difference. First operand 129 states and 165 transitions. Second operand has 23 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-02 12:40:28,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:40:28,840 INFO L93 Difference]: Finished difference Result 128 states and 163 transitions. [2023-12-02 12:40:28,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 12:40:28,840 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) Word has length 35 [2023-12-02 12:40:28,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:40:28,842 INFO L225 Difference]: With dead ends: 128 [2023-12-02 12:40:28,842 INFO L226 Difference]: Without dead ends: 128 [2023-12-02 12:40:28,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=176, Invalid=1807, Unknown=1, NotChecked=86, Total=2070 [2023-12-02 12:40:28,843 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 14 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 12:40:28,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 300 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 406 Invalid, 0 Unknown, 58 Unchecked, 0.6s Time] [2023-12-02 12:40:28,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-12-02 12:40:28,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2023-12-02 12:40:28,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 104 states have (on average 1.375) internal successors, (143), 115 states have internal predecessors, (143), 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 12:40:28,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 163 transitions. [2023-12-02 12:40:28,849 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 163 transitions. Word has length 35 [2023-12-02 12:40:28,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:40:28,850 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 163 transitions. [2023-12-02 12:40:28,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-02 12:40:28,850 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 163 transitions. [2023-12-02 12:40:28,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-02 12:40:28,851 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:40:28,851 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:40:28,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-02 12:40:29,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-02 12:40:29,052 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-12-02 12:40:29,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:40:29,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1749859559, now seen corresponding path program 1 times [2023-12-02 12:40:29,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:40:29,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82553599] [2023-12-02 12:40:29,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:40:29,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:40:29,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:40:29,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:40:29,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:40:29,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82553599] [2023-12-02 12:40:29,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82553599] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:40:29,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378424791] [2023-12-02 12:40:29,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:40:29,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:40:29,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:40:30,000 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:40:30,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 12:40:30,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:40:30,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 50 conjunts are in the unsatisfiable core [2023-12-02 12:40:30,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:40:30,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 12:40:30,330 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-12-02 12:40:30,330 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 12:40:30,426 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 12:40:30,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 12:40:30,665 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 12:40:30,665 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 58 [2023-12-02 12:40:30,670 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 24 [2023-12-02 12:40:30,693 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 24 [2023-12-02 12:40:30,702 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 26 treesize of output 14 [2023-12-02 12:40:30,871 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (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 12:40:30,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:40:30,903 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 12:40:30,934 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-12-02 12:40:30,934 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 12:40:30,992 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-12-02 12:40:30,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:40:31,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378424791] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:40:31,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [619376767] [2023-12-02 12:40:31,223 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-12-02 12:40:31,223 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:40:31,224 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:40:31,224 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:40:31,224 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:40:45,160 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 19 for LOIs [2023-12-02 12:40:45,168 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 49 for LOIs [2023-12-02 12:40:45,205 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:40:50,903 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7182#(and (= |ULTIMATE.start_create_#t~ret11#1.offset| 0) (or (< |ULTIMATE.start_create_~now~1#1.offset| 0) (< (select |#length| |ULTIMATE.start_create_~now~1#1.base|) (+ |ULTIMATE.start_create_~now~1#1.offset| 8))))' at error location [2023-12-02 12:40:50,904 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:40:50,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:40:50,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 26 [2023-12-02 12:40:50,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429140918] [2023-12-02 12:40:50,904 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:40:50,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-02 12:40:50,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:40:50,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-02 12:40:50,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2182, Unknown=4, NotChecked=94, Total=2450 [2023-12-02 12:40:50,906 INFO L87 Difference]: Start difference. First operand 128 states and 163 transitions. Second operand has 27 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 20 states have internal predecessors, (42), 4 states have call successors, (5), 3 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 12:40:52,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:40:52,651 INFO L93 Difference]: Finished difference Result 125 states and 157 transitions. [2023-12-02 12:40:52,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 12:40:52,652 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 20 states have internal predecessors, (42), 4 states have call successors, (5), 3 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 35 [2023-12-02 12:40:52,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:40:52,653 INFO L225 Difference]: With dead ends: 125 [2023-12-02 12:40:52,653 INFO L226 Difference]: Without dead ends: 125 [2023-12-02 12:40:52,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=272, Invalid=3030, Unknown=8, NotChecked=112, Total=3422 [2023-12-02 12:40:52,656 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 15 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 12:40:52,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 429 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 579 Invalid, 0 Unknown, 59 Unchecked, 0.9s Time] [2023-12-02 12:40:52,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-12-02 12:40:52,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 115. [2023-12-02 12:40:52,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 96 states have (on average 1.34375) internal successors, (129), 104 states have internal predecessors, (129), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 12:40:52,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 145 transitions. [2023-12-02 12:40:52,660 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 145 transitions. Word has length 35 [2023-12-02 12:40:52,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:40:52,660 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 145 transitions. [2023-12-02 12:40:52,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 20 states have internal predecessors, (42), 4 states have call successors, (5), 3 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 12:40:52,660 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 145 transitions. [2023-12-02 12:40:52,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-02 12:40:52,661 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:40:52,661 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, 1, 1] [2023-12-02 12:40:52,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 12:40:52,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-02 12:40:52,862 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-12-02 12:40:52,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:40:52,862 INFO L85 PathProgramCache]: Analyzing trace with hash -259857978, now seen corresponding path program 1 times [2023-12-02 12:40:52,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:40:52,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749525995] [2023-12-02 12:40:52,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:40:52,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:40:52,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:40:53,995 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:40:53,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:40:53,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749525995] [2023-12-02 12:40:53,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749525995] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:40:53,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473219272] [2023-12-02 12:40:53,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:40:53,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:40:53,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:40:53,997 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:40:53,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 12:40:54,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:40:54,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 95 conjunts are in the unsatisfiable core [2023-12-02 12:40:54,123 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:40:54,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 12:40:54,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 12:40:54,737 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 12:40:54,737 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 16 treesize of output 15 [2023-12-02 12:40:54,785 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-12-02 12:40:54,785 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 12:40:54,938 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 3 [2023-12-02 12:40:54,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 12:40:55,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:40:55,679 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 26 treesize of output 19 [2023-12-02 12:40:55,744 INFO L349 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2023-12-02 12:40:55,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 36 [2023-12-02 12:40:55,766 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 12:40:56,020 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 34 treesize of output 25 [2023-12-02 12:40:56,026 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 12:40:56,222 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:40:56,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 21 [2023-12-02 12:40:56,259 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:40:56,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-12-02 12:40:56,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 12 [2023-12-02 12:40:56,746 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:40:56,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:40:57,468 WARN L854 $PredicateComparison]: unable to prove that (and (or (forall ((v_ArrVal_1208 (Array Int Int)) (v_ArrVal_1209 Int)) (= (select (store |c_#valid| |c_ULTIMATE.start_main_~shared~0#1.base| v_ArrVal_1209) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~1#1.base| v_ArrVal_1208) |c_ULTIMATE.start_main_~shared~0#1.base|) 0)) 1)) (forall ((v_ArrVal_1207 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_~now~1#1.base| v_ArrVal_1207) |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0))) (forall ((v_ArrVal_1208 (Array Int Int)) (v_ArrVal_1209 Int)) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~1#1.base| v_ArrVal_1208) |c_ULTIMATE.start_main_~shared~0#1.base|) 0))) (or (= (select (store |c_#valid| |c_ULTIMATE.start_main_~shared~0#1.base| v_ArrVal_1209) .cse0) 1) (= .cse0 0))))) is different from false [2023-12-02 12:40:57,490 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1208 (Array Int Int)) (v_ArrVal_1209 Int)) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_#t~ret9#1.base| v_ArrVal_1208) |c_ULTIMATE.start_main_~shared~0#1.base|) 0))) (or (= .cse0 0) (= (select (store |c_#valid| |c_ULTIMATE.start_main_~shared~0#1.base| v_ArrVal_1209) .cse0) 1)))) (or (forall ((v_ArrVal_1208 (Array Int Int)) (v_ArrVal_1209 Int)) (= (select (store |c_#valid| |c_ULTIMATE.start_main_~shared~0#1.base| v_ArrVal_1209) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_#t~ret9#1.base| v_ArrVal_1208) |c_ULTIMATE.start_main_~shared~0#1.base|) 0)) 1)) (forall ((v_ArrVal_1207 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_#t~ret9#1.base| v_ArrVal_1207) |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0)))) is different from false [2023-12-02 12:40:57,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473219272] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:40:57,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [810349271] [2023-12-02 12:40:57,840 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-12-02 12:40:57,840 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:40:57,841 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:40:57,841 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:40:57,841 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:40:58,634 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 22 for LOIs [2023-12-02 12:40:58,647 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 16 for LOIs [2023-12-02 12:40:58,657 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:41:05,104 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7650#(and (not (= (select |#valid| |ULTIMATE.start_destroy_internal_~l#1.base|) 1)) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~l~0#1.offset| 0) (= |ULTIMATE.start_create_internal_#res#1.offset| 0) (= |ULTIMATE.start_create_#res#1.offset| 0) (= 0 |ULTIMATE.start_main_~shared~0#1.offset|) (or (not (= |ULTIMATE.start_destroy_internal_~l#1.offset| 0)) (not (= |ULTIMATE.start_destroy_internal_~l#1.base| 0))) (= |ULTIMATE.start_destroy_internal_#in~l#1.offset| 0))' at error location [2023-12-02 12:41:05,104 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:41:05,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:41:05,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 41 [2023-12-02 12:41:05,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082880902] [2023-12-02 12:41:05,104 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:41:05,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-12-02 12:41:05,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:41:05,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-12-02 12:41:05,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=4868, Unknown=2, NotChecked=282, Total=5402 [2023-12-02 12:41:05,108 INFO L87 Difference]: Start difference. First operand 115 states and 145 transitions. Second operand has 42 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 33 states have internal predecessors, (55), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 12:41:09,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:41:09,151 INFO L93 Difference]: Finished difference Result 130 states and 163 transitions. [2023-12-02 12:41:09,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-02 12:41:09,152 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 33 states have internal predecessors, (55), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 34 [2023-12-02 12:41:09,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:41:09,153 INFO L225 Difference]: With dead ends: 130 [2023-12-02 12:41:09,153 INFO L226 Difference]: Without dead ends: 130 [2023-12-02 12:41:09,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1840 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=375, Invalid=6771, Unknown=2, NotChecked=334, Total=7482 [2023-12-02 12:41:09,155 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 57 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 1703 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 1729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-12-02 12:41:09,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 713 Invalid, 1729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1703 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-12-02 12:41:09,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-12-02 12:41:09,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 120. [2023-12-02 12:41:09,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 101 states have (on average 1.3465346534653466) internal successors, (136), 109 states have internal predecessors, (136), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 12:41:09,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 152 transitions. [2023-12-02 12:41:09,159 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 152 transitions. Word has length 34 [2023-12-02 12:41:09,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:41:09,159 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 152 transitions. [2023-12-02 12:41:09,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 33 states have internal predecessors, (55), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 12:41:09,159 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 152 transitions. [2023-12-02 12:41:09,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-02 12:41:09,160 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:41:09,160 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, 1, 1] [2023-12-02 12:41:09,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 12:41:09,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:41:09,361 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-12-02 12:41:09,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:41:09,361 INFO L85 PathProgramCache]: Analyzing trace with hash -259857977, now seen corresponding path program 1 times [2023-12-02 12:41:09,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:41:09,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046395477] [2023-12-02 12:41:09,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:09,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:41:09,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:10,710 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 12:41:10,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:41:10,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046395477] [2023-12-02 12:41:10,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046395477] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:41:10,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2946575] [2023-12-02 12:41:10,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:10,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:41:10,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:41:10,711 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:41:10,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 12:41:10,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:10,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 81 conjunts are in the unsatisfiable core [2023-12-02 12:41:10,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:41:11,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 12:41:11,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 12:41:11,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 12:41:11,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 12:41:11,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:41:11,787 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 20 [2023-12-02 12:41:11,814 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2023-12-02 12:41:11,814 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 18 treesize of output 21 [2023-12-02 12:41:11,860 INFO L349 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2023-12-02 12:41:11,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-12-02 12:41:11,873 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 12:41:12,097 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 12:41:12,102 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 26 treesize of output 19 [2023-12-02 12:41:12,341 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:41:12,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-12-02 12:41:12,365 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:41:12,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2023-12-02 12:41:12,735 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 12:41:12,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:41:13,371 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1293 (Array Int Int)) (v_ArrVal_1292 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_~now~1#1.base| v_ArrVal_1292) |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 8) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~1#1.base| v_ArrVal_1293) |c_ULTIMATE.start_main_~shared~0#1.base|) 0)))) (forall ((v_ArrVal_1292 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_~now~1#1.base| v_ArrVal_1292) |c_ULTIMATE.start_main_~shared~0#1.base|) 0)))) is different from false [2023-12-02 12:41:13,386 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1293 (Array Int Int)) (v_ArrVal_1292 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_#t~ret9#1.base| v_ArrVal_1292) |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 8) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_#t~ret9#1.base| v_ArrVal_1293) |c_ULTIMATE.start_main_~shared~0#1.base|) 0)))) (forall ((v_ArrVal_1292 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_#t~ret9#1.base| v_ArrVal_1292) |c_ULTIMATE.start_main_~shared~0#1.base|) 0)))) is different from false [2023-12-02 12:41:13,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2946575] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:41:13,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1139377465] [2023-12-02 12:41:13,740 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-12-02 12:41:13,740 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:41:13,740 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:41:13,741 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:41:13,741 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:41:14,499 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 22 for LOIs [2023-12-02 12:41:14,523 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 16 for LOIs [2023-12-02 12:41:14,534 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:41:21,204 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8132#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~l~0#1.offset| 0) (= |ULTIMATE.start_create_internal_#res#1.offset| 0) (= |ULTIMATE.start_create_#res#1.offset| 0) (or (< |ULTIMATE.start_destroy_internal_~l#1.offset| 0) (< (select |#length| |ULTIMATE.start_destroy_internal_~l#1.base|) (+ |ULTIMATE.start_destroy_internal_~l#1.offset| 8))) (= 0 |ULTIMATE.start_main_~shared~0#1.offset|) (or (not (= |ULTIMATE.start_destroy_internal_~l#1.offset| 0)) (not (= |ULTIMATE.start_destroy_internal_~l#1.base| 0))) (= |ULTIMATE.start_destroy_internal_#in~l#1.offset| 0))' at error location [2023-12-02 12:41:21,205 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:41:21,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:41:21,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 35 [2023-12-02 12:41:21,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048115271] [2023-12-02 12:41:21,205 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:41:21,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-02 12:41:21,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:41:21,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-02 12:41:21,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=4085, Unknown=3, NotChecked=258, Total=4556 [2023-12-02 12:41:21,206 INFO L87 Difference]: Start difference. First operand 120 states and 152 transitions. Second operand has 36 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 30 states have internal predecessors, (53), 5 states have call successors, (5), 2 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 12:41:24,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:41:24,985 INFO L93 Difference]: Finished difference Result 145 states and 178 transitions. [2023-12-02 12:41:24,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 12:41:24,986 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 30 states have internal predecessors, (53), 5 states have call successors, (5), 2 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 34 [2023-12-02 12:41:24,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:41:24,987 INFO L225 Difference]: With dead ends: 145 [2023-12-02 12:41:24,988 INFO L226 Difference]: Without dead ends: 145 [2023-12-02 12:41:24,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=320, Invalid=6005, Unknown=3, NotChecked=314, Total=6642 [2023-12-02 12:41:24,989 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 92 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 1406 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 1044 SdHoareTripleChecker+Invalid, 1415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:41:24,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 1044 Invalid, 1415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1406 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-12-02 12:41:24,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-12-02 12:41:24,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 120. [2023-12-02 12:41:24,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 101 states have (on average 1.3366336633663367) internal successors, (135), 109 states have internal predecessors, (135), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 12:41:24,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 151 transitions. [2023-12-02 12:41:24,993 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 151 transitions. Word has length 34 [2023-12-02 12:41:24,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:41:24,993 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 151 transitions. [2023-12-02 12:41:24,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 30 states have internal predecessors, (53), 5 states have call successors, (5), 2 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 12:41:24,993 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 151 transitions. [2023-12-02 12:41:24,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-02 12:41:24,994 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:41:24,994 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:41:24,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-02 12:41:25,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:41:25,194 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-12-02 12:41:25,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:41:25,195 INFO L85 PathProgramCache]: Analyzing trace with hash -615348344, now seen corresponding path program 1 times [2023-12-02 12:41:25,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:41:25,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759178962] [2023-12-02 12:41:25,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:25,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:41:25,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:26,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 12:41:26,112 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:41:26,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759178962] [2023-12-02 12:41:26,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759178962] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:41:26,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89821250] [2023-12-02 12:41:26,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:26,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:41:26,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:41:26,114 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:41:26,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-02 12:41:26,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:26,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 53 conjunts are in the unsatisfiable core [2023-12-02 12:41:26,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:41:26,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 12:41:26,844 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 5 [2023-12-02 12:41:26,971 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 12:41:26,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 12:41:26,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-12-02 12:41:27,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-12-02 12:41:27,376 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:41:27,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2023-12-02 12:41:27,521 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 12:41:27,521 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:41:30,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89821250] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:41:30,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2138459431] [2023-12-02 12:41:30,322 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-12-02 12:41:30,322 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:41:30,322 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:41:30,322 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:41:30,322 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:41:31,126 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 22 for LOIs [2023-12-02 12:41:31,138 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 16 for LOIs [2023-12-02 12:41:31,149 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:41:37,314 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8634#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~l~0#1.offset| 0) (= |ULTIMATE.start_destroy_internal_~next~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_destroy_internal_~l#1.base|) 0)) (= |ULTIMATE.start_create_internal_#res#1.offset| 0) (<= |#StackHeapBarrier| |ULTIMATE.start_destroy_internal_~l#1.base|) (= |ULTIMATE.start_create_#res#1.offset| 0) (= 0 |ULTIMATE.start_main_~shared~0#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_destroy_internal_~l#1.base|) 0) |ULTIMATE.start_destroy_internal_~next~0#1.base|) (= |ULTIMATE.start_destroy_internal_~l#1.offset| 0) (<= 8 (select |#length| |ULTIMATE.start_destroy_internal_~l#1.base|)) (= (select |#valid| |ULTIMATE.start_destroy_internal_~l#1.base|) 1) (= |ULTIMATE.start_destroy_internal_#in~l#1.offset| 0))' at error location [2023-12-02 12:41:37,314 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:41:37,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:41:37,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 32 [2023-12-02 12:41:37,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481167795] [2023-12-02 12:41:37,315 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:41:37,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-02 12:41:37,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:41:37,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-02 12:41:37,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=3250, Unknown=1, NotChecked=0, Total=3422 [2023-12-02 12:41:37,316 INFO L87 Difference]: Start difference. First operand 120 states and 151 transitions. Second operand has 33 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 27 states have internal predecessors, (49), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 12:41:40,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:41:40,347 INFO L93 Difference]: Finished difference Result 143 states and 176 transitions. [2023-12-02 12:41:40,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-02 12:41:40,347 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 27 states have internal predecessors, (49), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 36 [2023-12-02 12:41:40,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:41:40,348 INFO L225 Difference]: With dead ends: 143 [2023-12-02 12:41:40,348 INFO L226 Difference]: Without dead ends: 143 [2023-12-02 12:41:40,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=281, Invalid=5120, Unknown=1, NotChecked=0, Total=5402 [2023-12-02 12:41:40,349 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 82 mSDsluCounter, 844 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-02 12:41:40,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 895 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-02 12:41:40,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-12-02 12:41:40,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 121. [2023-12-02 12:41:40,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 102 states have (on average 1.3333333333333333) internal successors, (136), 110 states have internal predecessors, (136), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 12:41:40,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 152 transitions. [2023-12-02 12:41:40,354 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 152 transitions. Word has length 36 [2023-12-02 12:41:40,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:41:40,354 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 152 transitions. [2023-12-02 12:41:40,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 27 states have internal predecessors, (49), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 12:41:40,354 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 152 transitions. [2023-12-02 12:41:40,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-02 12:41:40,355 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:41:40,355 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:41:40,361 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-02 12:41:40,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:41:40,556 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-12-02 12:41:40,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:41:40,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1878204428, now seen corresponding path program 2 times [2023-12-02 12:41:40,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:41:40,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990150626] [2023-12-02 12:41:40,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:40,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:41:40,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:41,363 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 12:41:41,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:41:41,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990150626] [2023-12-02 12:41:41,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990150626] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:41:41,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781461994] [2023-12-02 12:41:41,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:41:41,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:41:41,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:41:41,365 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:41:41,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-02 12:41:41,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 12:41:41,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:41:41,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 57 conjunts are in the unsatisfiable core [2023-12-02 12:41:41,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:41:41,726 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2023-12-02 12:41:41,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:41:41,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 12:41:41,758 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 12:41:41,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 12:41:42,018 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 12:41:42,018 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 13 [2023-12-02 12:41:42,438 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-12-02 12:41:42,438 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:41:43,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781461994] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:41:43,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [691117401] [2023-12-02 12:41:43,037 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 12:41:43,037 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:41:43,037 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:41:43,037 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:41:43,038 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:41:43,658 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 22 for LOIs [2023-12-02 12:41:43,671 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 16 for LOIs [2023-12-02 12:41:43,681 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:41:48,742 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9116#(and (= |ULTIMATE.start_destroy_internal_#in~l#1.base| |ULTIMATE.start_main_~shared~0#1.base|) (not (= |ULTIMATE.start_create_#res#1.base| 0)) (<= 1 |#StackHeapBarrier|) (<= (select |#length| |ULTIMATE.start_destroy_internal_~l#1.base|) 7) (= |ULTIMATE.start_main_~l~0#1.offset| 0) (= |ULTIMATE.start_create_internal_#res#1.offset| 0) (exists ((|v_#valid_346| (Array Int Int))) (and (= (select |v_#valid_346| |ULTIMATE.start_create_#res#1.base|) 0) (= |#valid| (store |v_#valid_346| |ULTIMATE.start_create_#res#1.base| 1)))) (= |ULTIMATE.start_create_#res#1.offset| 0) (= |ULTIMATE.start_create_internal_#res#1.base| |ULTIMATE.start_main_~shared~0#1.base|) (exists ((|v_#memory_$Pointer$.offset_376| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_376| |ULTIMATE.start_create_#res#1.base| (store (store (select |v_#memory_$Pointer$.offset_376| |ULTIMATE.start_create_#res#1.base|) 0 0) 8 0)))) (= 0 |ULTIMATE.start_main_~shared~0#1.offset|) (= |ULTIMATE.start_destroy_internal_~l#1.offset| 0) (= |ULTIMATE.start_destroy_internal_~l#1.base| |ULTIMATE.start_destroy_internal_#in~l#1.base|) (= |ULTIMATE.start_main_~l~0#1.base| |ULTIMATE.start_create_#res#1.base|) (exists ((|v_#memory_$Pointer$.base_388| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_388| |ULTIMATE.start_create_#res#1.base| (store (store (select |v_#memory_$Pointer$.base_388| |ULTIMATE.start_create_#res#1.base|) 0 0) 8 |ULTIMATE.start_main_~shared~0#1.base|)) |#memory_$Pointer$.base|)) (exists ((|v_#length_259| (Array Int Int))) (= |#length| (store |v_#length_259| |ULTIMATE.start_create_#res#1.base| 16))) (not (= |ULTIMATE.start_destroy_internal_~l#1.base| 0)) (= |ULTIMATE.start_destroy_internal_#in~l#1.offset| 0) (<= (+ |ULTIMATE.start_create_#res#1.base| 1) |#StackHeapBarrier|))' at error location [2023-12-02 12:41:48,742 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:41:48,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:41:48,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 26 [2023-12-02 12:41:48,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125163695] [2023-12-02 12:41:48,743 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:41:48,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-02 12:41:48,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:41:48,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-02 12:41:48,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2470, Unknown=2, NotChecked=100, Total=2756 [2023-12-02 12:41:48,744 INFO L87 Difference]: Start difference. First operand 121 states and 152 transitions. Second operand has 27 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 23 states have internal predecessors, (51), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 12:41:51,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:41:51,382 INFO L93 Difference]: Finished difference Result 159 states and 187 transitions. [2023-12-02 12:41:51,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 12:41:51,382 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 23 states have internal predecessors, (51), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 37 [2023-12-02 12:41:51,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:41:51,384 INFO L225 Difference]: With dead ends: 159 [2023-12-02 12:41:51,384 INFO L226 Difference]: Without dead ends: 159 [2023-12-02 12:41:51,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=280, Invalid=3504, Unknown=2, NotChecked=120, Total=3906 [2023-12-02 12:41:51,385 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 92 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-12-02 12:41:51,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 847 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1028 Invalid, 0 Unknown, 128 Unchecked, 1.7s Time] [2023-12-02 12:41:51,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-12-02 12:41:51,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 110. [2023-12-02 12:41:51,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 92 states have (on average 1.315217391304348) internal successors, (121), 100 states have internal predecessors, (121), 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 12:41:51,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 135 transitions. [2023-12-02 12:41:51,390 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 135 transitions. Word has length 37 [2023-12-02 12:41:51,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:41:51,390 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 135 transitions. [2023-12-02 12:41:51,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 23 states have internal predecessors, (51), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 12:41:51,390 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 135 transitions. [2023-12-02 12:41:51,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-02 12:41:51,391 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:41:51,391 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, 1, 1, 1, 1, 1] [2023-12-02 12:41:51,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-02 12:41:51,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:41:51,591 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-12-02 12:41:51,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:41:51,592 INFO L85 PathProgramCache]: Analyzing trace with hash -147812386, now seen corresponding path program 1 times [2023-12-02 12:41:51,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:41:51,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764225405] [2023-12-02 12:41:51,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:51,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:41:51,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:53,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 12:41:53,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:41:53,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764225405] [2023-12-02 12:41:53,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764225405] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:41:53,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50894688] [2023-12-02 12:41:53,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:41:53,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:41:53,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:41:53,416 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:41:53,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-02 12:41:53,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:41:53,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 84 conjunts are in the unsatisfiable core [2023-12-02 12:41:53,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:41:53,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 12:41:53,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 12:41:53,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 12:41:54,181 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 12:41:54,181 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 16 treesize of output 15 [2023-12-02 12:41:54,218 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 12:41:54,218 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 16 treesize of output 15 [2023-12-02 12:41:54,261 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-12-02 12:41:54,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-12-02 12:41:54,482 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 12:41:54,489 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 12:41:54,682 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 12:41:54,683 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 16 treesize of output 15 [2023-12-02 12:41:54,710 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 12:41:54,710 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 11 treesize of output 11 [2023-12-02 12:41:54,718 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 12:41:54,834 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 12:41:54,845 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 23 treesize of output 11 [2023-12-02 12:41:55,130 INFO L349 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2023-12-02 12:41:55,131 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 52 [2023-12-02 12:41:55,137 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 20 treesize of output 11 [2023-12-02 12:41:55,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-12-02 12:41:55,371 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:41:55,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-12-02 12:41:55,392 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:41:55,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-12-02 12:41:55,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 12:41:55,531 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:41:55,712 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1556 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_#t~mem12#1.base| v_ArrVal_1556) |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0)) (forall ((v_ArrVal_1557 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_#t~mem12#1.base| v_ArrVal_1557) |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0))) is different from false [2023-12-02 12:41:55,726 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~1#1.base|) |c_ULTIMATE.start_create_~now~1#1.offset|))) (and (forall ((v_ArrVal_1557 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1557) |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0)) (forall ((v_ArrVal_1556 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1556) |c_ULTIMATE.start_main_~shared~0#1.base|) 0) 0)))) is different from false [2023-12-02 12:41:56,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50894688] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:41:56,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [719900106] [2023-12-02 12:41:56,376 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2023-12-02 12:41:56,377 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:41:56,377 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:41:56,377 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:41:56,377 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:42:10,604 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 19 for LOIs [2023-12-02 12:42:10,612 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 53 for LOIs [2023-12-02 12:42:10,647 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:42:17,537 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9622#(and (not (= (select |#valid| |ULTIMATE.start_destroy_internal_~l#1.base|) 1)) (or (not (= |ULTIMATE.start_destroy_internal_~l#1.offset| 0)) (not (= |ULTIMATE.start_destroy_internal_~l#1.base| 0))))' at error location [2023-12-02 12:42:17,537 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:42:17,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:42:17,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 38 [2023-12-02 12:42:17,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839846665] [2023-12-02 12:42:17,538 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:42:17,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-02 12:42:17,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:42:17,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-02 12:42:17,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=4083, Unknown=9, NotChecked=258, Total=4556 [2023-12-02 12:42:17,540 INFO L87 Difference]: Start difference. First operand 110 states and 135 transitions. Second operand has 38 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 31 states have internal predecessors, (53), 5 states have call successors, (5), 2 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 12:42:20,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:42:20,917 INFO L93 Difference]: Finished difference Result 141 states and 171 transitions. [2023-12-02 12:42:20,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 12:42:20,917 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 31 states have internal predecessors, (53), 5 states have call successors, (5), 2 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 37 [2023-12-02 12:42:20,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:42:20,919 INFO L225 Difference]: With dead ends: 141 [2023-12-02 12:42:20,919 INFO L226 Difference]: Without dead ends: 141 [2023-12-02 12:42:20,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=343, Invalid=5976, Unknown=9, NotChecked=314, Total=6642 [2023-12-02 12:42:20,920 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 66 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-02 12:42:20,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 577 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 997 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-02 12:42:20,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-12-02 12:42:20,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 124. [2023-12-02 12:42:20,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 105 states have (on average 1.2857142857142858) internal successors, (135), 113 states have internal predecessors, (135), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 12:42:20,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 151 transitions. [2023-12-02 12:42:20,924 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 151 transitions. Word has length 37 [2023-12-02 12:42:20,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:42:20,924 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 151 transitions. [2023-12-02 12:42:20,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 31 states have internal predecessors, (53), 5 states have call successors, (5), 2 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 12:42:20,925 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 151 transitions. [2023-12-02 12:42:20,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-02 12:42:20,925 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:42:20,925 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, 1, 1, 1, 1, 1, 1] [2023-12-02 12:42:20,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-12-02 12:42:21,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:42:21,126 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-12-02 12:42:21,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:42:21,126 INFO L85 PathProgramCache]: Analyzing trace with hash -287144795, now seen corresponding path program 1 times [2023-12-02 12:42:21,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:42:21,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948250226] [2023-12-02 12:42:21,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:42:21,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:42:21,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:42:21,383 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:42:21,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:42:21,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948250226] [2023-12-02 12:42:21,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948250226] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:42:21,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712503089] [2023-12-02 12:42:21,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:42:21,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:42:21,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:42:21,385 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:42:21,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-02 12:42:21,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:42:21,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 12:42:21,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:42:21,786 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 12:42:21,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:42:21,896 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:42:21,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2023-12-02 12:42:22,039 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 12:42:22,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712503089] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:42:22,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1985476381] [2023-12-02 12:42:22,041 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 12:42:22,041 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:42:22,042 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:42:22,042 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:42:22,042 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:42:35,769 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero_internal with input of size 19 for LOIs [2023-12-02 12:42:35,776 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 53 for LOIs [2023-12-02 12:42:35,812 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:42:40,770 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10177#(and (= |ULTIMATE.start_destroy_#in~l#1.offset| |ULTIMATE.start_main_~l~0#1.offset|) (= |ULTIMATE.start_main_~l~0#1.base| |ULTIMATE.start_destroy_#in~l#1.base|) (or (< |ULTIMATE.start_destroy_~l#1.offset| 0) (< (select |#length| |ULTIMATE.start_destroy_~l#1.base|) (+ |ULTIMATE.start_destroy_~l#1.offset| 8))) (= |ULTIMATE.start_destroy_#in~l#1.offset| |ULTIMATE.start_destroy_~l#1.offset|) (or (not (= |ULTIMATE.start_destroy_~l#1.base| 0)) (not (= |ULTIMATE.start_destroy_~l#1.offset| 0))) (= |ULTIMATE.start_destroy_#in~l#1.base| |ULTIMATE.start_destroy_~l#1.base|))' at error location [2023-12-02 12:42:40,770 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:42:40,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:42:40,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2023-12-02 12:42:40,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978185171] [2023-12-02 12:42:40,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:42:40,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 12:42:40,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:42:40,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 12:42:40,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1605, Unknown=0, NotChecked=0, Total=1722 [2023-12-02 12:42:40,772 INFO L87 Difference]: Start difference. First operand 124 states and 151 transitions. Second operand has 15 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 14 states have internal predecessors, (56), 4 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-02 12:42:41,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:42:41,503 INFO L93 Difference]: Finished difference Result 166 states and 198 transitions. [2023-12-02 12:42:41,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 12:42:41,503 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 14 states have internal predecessors, (56), 4 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 38 [2023-12-02 12:42:41,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:42:41,505 INFO L225 Difference]: With dead ends: 166 [2023-12-02 12:42:41,505 INFO L226 Difference]: Without dead ends: 166 [2023-12-02 12:42:41,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=134, Invalid=1846, Unknown=0, NotChecked=0, Total=1980 [2023-12-02 12:42:41,506 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 42 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 12:42:41,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 295 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 12:42:41,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2023-12-02 12:42:41,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 148. [2023-12-02 12:42:41,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 128 states have (on average 1.296875) internal successors, (166), 136 states have internal predecessors, (166), 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 12:42:41,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 184 transitions. [2023-12-02 12:42:41,512 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 184 transitions. Word has length 38 [2023-12-02 12:42:41,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:42:41,512 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 184 transitions. [2023-12-02 12:42:41,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 14 states have internal predecessors, (56), 4 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-02 12:42:41,513 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 184 transitions. [2023-12-02 12:42:41,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-02 12:42:41,513 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:42:41,513 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:42:41,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-12-02 12:42:41,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-12-02 12:42:41,714 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-12-02 12:42:41,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:42:41,714 INFO L85 PathProgramCache]: Analyzing trace with hash -921973961, now seen corresponding path program 2 times [2023-12-02 12:42:41,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:42:41,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431143524] [2023-12-02 12:42:41,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:42:41,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:42:41,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:42:43,411 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:42:43,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:42:43,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431143524] [2023-12-02 12:42:43,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431143524] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:42:43,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276199052] [2023-12-02 12:42:43,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:42:43,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:42:43,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:42:43,413 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:42:43,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8586057d-c6f6-466e-8e2d-33340eeaa7db/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-02 12:42:43,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 12:42:43,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:42:43,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 97 conjunts are in the unsatisfiable core [2023-12-02 12:42:43,596 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:42:43,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 12:42:43,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 12:42:44,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 12:42:44,267 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-12-02 12:42:44,268 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 12:42:44,288 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 12:42:44,447 INFO L349 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2023-12-02 12:42:44,448 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 1 case distinctions, treesize of input 34 treesize of output 29 [2023-12-02 12:42:44,455 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 12:42:45,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:42:45,185 INFO L349 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2023-12-02 12:42:45,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 96 [2023-12-02 12:42:45,310 INFO L349 Elim1Store]: treesize reduction 4, result has 94.5 percent of original size [2023-12-02 12:42:45,310 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 87 treesize of output 139 [2023-12-02 12:42:45,380 INFO L349 Elim1Store]: treesize reduction 56, result has 38.5 percent of original size [2023-12-02 12:42:45,381 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 3 case distinctions, treesize of input 73 treesize of output 87 [2023-12-02 12:42:45,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 81 [2023-12-02 12:42:46,408 INFO L349 Elim1Store]: treesize reduction 68, result has 39.3 percent of original size [2023-12-02 12:42:46,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 146 treesize of output 161 [2023-12-02 12:42:46,546 INFO L349 Elim1Store]: treesize reduction 76, result has 52.5 percent of original size [2023-12-02 12:42:46,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 185 [2023-12-02 12:44:12,465 WARN L293 SmtUtils]: Spent 57.23s on a formula simplification. DAG size of input: 2400 DAG size of output: 2336 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-12-02 12:44:12,467 INFO L349 Elim1Store]: treesize reduction 256, result has 97.1 percent of original size [2023-12-02 12:44:12,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 34 select indices, 34 select index equivalence classes, 0 disjoint index pairs (out of 561 index pairs), introduced 34 new quantified variables, introduced 561 case distinctions, treesize of input 2447 treesize of output 10899