./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_trivial_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_trivial_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0286582125bb2879636b8cf3b934bed172850a3a3b0d880c07306d10439134a7 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:19:57,058 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:19:57,215 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-19 04:19:57,222 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:19:57,222 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:19:57,251 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:19:57,252 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:19:57,252 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:19:57,253 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:19:57,254 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:19:57,254 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:19:57,255 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:19:57,256 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:19:57,256 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:19:57,257 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:19:57,258 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:19:57,258 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:19:57,259 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:19:57,260 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:19:57,260 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:19:57,261 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:19:57,262 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:19:57,263 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 04:19:57,263 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 04:19:57,264 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:19:57,265 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:19:57,265 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:19:57,266 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:19:57,267 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:19:57,267 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 04:19:57,268 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 04:19:57,268 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 04:19:57,269 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:19:57,269 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 04:19:57,270 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 04:19:57,270 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:19:57,271 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:19:57,271 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:19:57,271 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:19:57,272 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:19:57,273 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:19:57,273 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:19:57,273 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:19:57,274 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:19:57,274 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:19:57,274 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:19:57,275 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_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0286582125bb2879636b8cf3b934bed172850a3a3b0d880c07306d10439134a7 [2023-11-19 04:19:57,604 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:19:57,637 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:19:57,640 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:19:57,642 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:19:57,642 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:19:57,644 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_trivial_ground.i [2023-11-19 04:20:00,972 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:20:01,263 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:20:01,264 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_trivial_ground.i [2023-11-19 04:20:01,272 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/data/2297c7387/82146826f871434993200ee56e7732ca/FLAG0864b10d7 [2023-11-19 04:20:01,294 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/data/2297c7387/82146826f871434993200ee56e7732ca [2023-11-19 04:20:01,302 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:20:01,303 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:20:01,305 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:20:01,306 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:20:01,312 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:20:01,313 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:20:01" (1/1) ... [2023-11-19 04:20:01,314 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28d00fc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:20:01, skipping insertion in model container [2023-11-19 04:20:01,315 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:20:01" (1/1) ... [2023-11-19 04:20:01,344 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:20:01,561 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:20:01,572 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:20:01,602 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:20:01,621 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:20:01,622 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:20:01 WrapperNode [2023-11-19 04:20:01,622 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:20:01,623 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:20:01,624 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:20:01,624 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:20:01,633 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:20:01" (1/1) ... [2023-11-19 04:20:01,642 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:20:01" (1/1) ... [2023-11-19 04:20:01,674 INFO L138 Inliner]: procedures = 18, calls = 30, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 167 [2023-11-19 04:20:01,675 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:20:01,676 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:20:01,676 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:20:01,676 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:20:01,687 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:20:01" (1/1) ... [2023-11-19 04:20:01,688 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:20:01" (1/1) ... [2023-11-19 04:20:01,692 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:20:01" (1/1) ... [2023-11-19 04:20:01,692 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:20:01" (1/1) ... [2023-11-19 04:20:01,701 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:20:01" (1/1) ... [2023-11-19 04:20:01,707 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:20:01" (1/1) ... [2023-11-19 04:20:01,709 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:20:01" (1/1) ... [2023-11-19 04:20:01,711 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:20:01" (1/1) ... [2023-11-19 04:20:01,715 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:20:01,716 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:20:01,716 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:20:01,716 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:20:01,717 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:20:01" (1/1) ... [2023-11-19 04:20:01,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:20:01,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:20:01,770 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:20:01,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:20:01,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:20:01,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:20:01,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 04:20:01,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 04:20:01,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:20:01,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:20:01,810 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 04:20:01,810 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-19 04:20:01,811 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-19 04:20:01,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 04:20:01,893 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:20:01,895 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:20:02,384 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:20:02,470 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:20:02,470 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-19 04:20:02,476 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:20:02 BoogieIcfgContainer [2023-11-19 04:20:02,476 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:20:02,480 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:20:02,480 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:20:02,484 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:20:02,485 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:20:01" (1/3) ... [2023-11-19 04:20:02,486 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d95a243 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:20:02, skipping insertion in model container [2023-11-19 04:20:02,486 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:20:01" (2/3) ... [2023-11-19 04:20:02,487 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d95a243 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:20:02, skipping insertion in model container [2023-11-19 04:20:02,487 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:20:02" (3/3) ... [2023-11-19 04:20:02,488 INFO L112 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_trivial_ground.i [2023-11-19 04:20:02,510 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:20:02,510 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-11-19 04:20:02,560 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:20:02,569 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;@33944951, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:20:02,570 INFO L358 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2023-11-19 04:20:02,575 INFO L276 IsEmpty]: Start isEmpty. Operand has 68 states, 37 states have (on average 2.081081081081081) internal successors, (77), 63 states have internal predecessors, (77), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 04:20:02,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-19 04:20:02,582 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:20:02,583 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-19 04:20:02,584 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-19 04:20:02,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:20:02,591 INFO L85 PathProgramCache]: Analyzing trace with hash 250182, now seen corresponding path program 1 times [2023-11-19 04:20:02,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:20:02,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456022868] [2023-11-19 04:20:02,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:20:02,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:20:02,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:20:02,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:20:02,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:20:02,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456022868] [2023-11-19 04:20:02,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456022868] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:20:02,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:20:02,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 04:20:02,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908650794] [2023-11-19 04:20:02,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:20:02,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:20:02,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:20:02,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:20:02,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:20:02,938 INFO L87 Difference]: Start difference. First operand has 68 states, 37 states have (on average 2.081081081081081) internal successors, (77), 63 states have internal predecessors, (77), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:20:03,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:20:03,151 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2023-11-19 04:20:03,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:20:03,156 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-19 04:20:03,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:20:03,163 INFO L225 Difference]: With dead ends: 60 [2023-11-19 04:20:03,163 INFO L226 Difference]: Without dead ends: 59 [2023-11-19 04:20:03,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:20:03,174 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 55 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:20:03,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 37 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:20:03,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-19 04:20:03,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-11-19 04:20:03,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 54 states have internal predecessors, (66), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 04:20:03,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2023-11-19 04:20:03,226 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 3 [2023-11-19 04:20:03,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:20:03,227 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2023-11-19 04:20:03,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:20:03,229 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2023-11-19 04:20:03,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-19 04:20:03,232 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:20:03,232 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-19 04:20:03,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:20:03,233 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-19 04:20:03,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:20:03,237 INFO L85 PathProgramCache]: Analyzing trace with hash 250183, now seen corresponding path program 1 times [2023-11-19 04:20:03,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:20:03,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125091807] [2023-11-19 04:20:03,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:20:03,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:20:03,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:20:03,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:20:03,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:20:03,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125091807] [2023-11-19 04:20:03,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125091807] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:20:03,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:20:03,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 04:20:03,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255598465] [2023-11-19 04:20:03,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:20:03,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:20:03,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:20:03,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:20:03,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:20:03,451 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:20:03,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:20:03,599 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2023-11-19 04:20:03,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:20:03,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-19 04:20:03,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:20:03,602 INFO L225 Difference]: With dead ends: 61 [2023-11-19 04:20:03,602 INFO L226 Difference]: Without dead ends: 61 [2023-11-19 04:20:03,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:20:03,605 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 0 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:20:03,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 77 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:20:03,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-19 04:20:03,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-11-19 04:20:03,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 56 states have internal predecessors, (68), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 04:20:03,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2023-11-19 04:20:03,619 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 3 [2023-11-19 04:20:03,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:20:03,619 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2023-11-19 04:20:03,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:20:03,620 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2023-11-19 04:20:03,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-19 04:20:03,621 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:20:03,621 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2023-11-19 04:20:03,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:20:03,622 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-19 04:20:03,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:20:03,623 INFO L85 PathProgramCache]: Analyzing trace with hash 240636645, now seen corresponding path program 1 times [2023-11-19 04:20:03,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:20:03,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431001442] [2023-11-19 04:20:03,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:20:03,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:20:03,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:20:03,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:20:03,882 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:20:03,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431001442] [2023-11-19 04:20:03,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431001442] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:20:03,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505620971] [2023-11-19 04:20:03,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:20:03,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:20:03,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:20:03,888 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:20:03,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:20:03,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:20:03,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 04:20:03,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:20:04,107 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 [2023-11-19 04:20:04,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:20:04,210 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:20:04,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:20:04,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505620971] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:20:04,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [586379353] [2023-11-19 04:20:04,370 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2023-11-19 04:20:04,370 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:20:04,378 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:20:04,386 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:20:04,388 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:20:05,167 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:20:05,371 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '351#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_#t~nondet4#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet4#1|)) (<= (select |#length| |ULTIMATE.start_main_~#set~0#1.base|) (+ 3 (* |ULTIMATE.start_main_~x~0#1| 4))) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| 0) (<= 2 |ULTIMATE.start_main_~#set~0#1.base|))' at error location [2023-11-19 04:20:05,378 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:20:05,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:20:05,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2023-11-19 04:20:05,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239357076] [2023-11-19 04:20:05,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:20:05,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 04:20:05,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:20:05,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 04:20:05,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-11-19 04:20:05,384 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:20:06,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:20:06,125 INFO L93 Difference]: Finished difference Result 225 states and 291 transitions. [2023-11-19 04:20:06,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 04:20:06,131 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-19 04:20:06,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:20:06,141 INFO L225 Difference]: With dead ends: 225 [2023-11-19 04:20:06,141 INFO L226 Difference]: Without dead ends: 225 [2023-11-19 04:20:06,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-19 04:20:06,146 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 381 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 04:20:06,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 203 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 04:20:06,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-11-19 04:20:06,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 128. [2023-11-19 04:20:06,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 97 states have (on average 1.6391752577319587) internal successors, (159), 114 states have internal predecessors, (159), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-19 04:20:06,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 183 transitions. [2023-11-19 04:20:06,177 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 183 transitions. Word has length 5 [2023-11-19 04:20:06,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:20:06,178 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 183 transitions. [2023-11-19 04:20:06,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:20:06,178 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 183 transitions. [2023-11-19 04:20:06,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-19 04:20:06,179 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:20:06,179 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2023-11-19 04:20:06,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 04:20:06,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:20:06,380 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-19 04:20:06,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:20:06,381 INFO L85 PathProgramCache]: Analyzing trace with hash 2145951374, now seen corresponding path program 1 times [2023-11-19 04:20:06,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:20:06,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508598923] [2023-11-19 04:20:06,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:20:06,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:20:06,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:20:06,537 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 04:20:06,537 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:20:06,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508598923] [2023-11-19 04:20:06,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508598923] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:20:06,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:20:06,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:20:06,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919251313] [2023-11-19 04:20:06,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:20:06,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:20:06,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:20:06,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:20:06,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:20:06,546 INFO L87 Difference]: Start difference. First operand 128 states and 183 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:20:06,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:20:06,628 INFO L93 Difference]: Finished difference Result 125 states and 180 transitions. [2023-11-19 04:20:06,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:20:06,629 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-19 04:20:06,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:20:06,631 INFO L225 Difference]: With dead ends: 125 [2023-11-19 04:20:06,631 INFO L226 Difference]: Without dead ends: 125 [2023-11-19 04:20:06,631 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 [2023-11-19 04:20:06,633 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 40 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:20:06,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 49 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:20:06,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-11-19 04:20:06,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2023-11-19 04:20:06,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 97 states have (on average 1.6082474226804124) internal successors, (156), 111 states have internal predecessors, (156), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-19 04:20:06,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 180 transitions. [2023-11-19 04:20:06,647 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 180 transitions. Word has length 13 [2023-11-19 04:20:06,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:20:06,647 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 180 transitions. [2023-11-19 04:20:06,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:20:06,648 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 180 transitions. [2023-11-19 04:20:06,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-19 04:20:06,648 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:20:06,649 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2023-11-19 04:20:06,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 04:20:06,649 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-19 04:20:06,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:20:06,650 INFO L85 PathProgramCache]: Analyzing trace with hash 2145951375, now seen corresponding path program 1 times [2023-11-19 04:20:06,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:20:06,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696984476] [2023-11-19 04:20:06,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:20:06,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:20:06,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:20:06,758 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:20:06,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:20:06,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696984476] [2023-11-19 04:20:06,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696984476] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:20:06,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691354200] [2023-11-19 04:20:06,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:20:06,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:20:06,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:20:06,761 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:20:06,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:20:06,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:20:06,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 04:20:06,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:20:06,875 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:20:06,875 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:20:06,949 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:20:06,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691354200] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:20:06,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1036661347] [2023-11-19 04:20:06,955 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-19 04:20:06,956 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:20:06,956 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:20:06,956 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:20:06,957 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:20:07,362 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:20:07,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1036661347] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:20:07,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:20:07,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6, 6] total 17 [2023-11-19 04:20:07,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105007180] [2023-11-19 04:20:07,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:20:07,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:20:07,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:20:07,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:20:07,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=178, Unknown=0, NotChecked=0, Total=306 [2023-11-19 04:20:07,553 INFO L87 Difference]: Start difference. First operand 125 states and 180 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:20:07,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:20:07,784 INFO L93 Difference]: Finished difference Result 117 states and 159 transitions. [2023-11-19 04:20:07,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 04:20:07,786 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-19 04:20:07,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:20:07,788 INFO L225 Difference]: With dead ends: 117 [2023-11-19 04:20:07,788 INFO L226 Difference]: Without dead ends: 117 [2023-11-19 04:20:07,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=198, Unknown=0, NotChecked=0, Total=342 [2023-11-19 04:20:07,789 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 24 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:20:07,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 117 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:20:07,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-11-19 04:20:07,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 109. [2023-11-19 04:20:07,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 87 states have (on average 1.5862068965517242) internal successors, (138), 99 states have internal predecessors, (138), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 04:20:07,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 154 transitions. [2023-11-19 04:20:07,812 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 154 transitions. Word has length 13 [2023-11-19 04:20:07,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:20:07,812 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 154 transitions. [2023-11-19 04:20:07,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:20:07,813 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 154 transitions. [2023-11-19 04:20:07,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 04:20:07,814 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:20:07,814 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1] [2023-11-19 04:20:07,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:20:08,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:20:08,033 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-19 04:20:08,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:20:08,034 INFO L85 PathProgramCache]: Analyzing trace with hash 675135613, now seen corresponding path program 1 times [2023-11-19 04:20:08,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:20:08,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267183993] [2023-11-19 04:20:08,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:20:08,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:20:08,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:20:08,180 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:20:08,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:20:08,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267183993] [2023-11-19 04:20:08,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267183993] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:20:08,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444735399] [2023-11-19 04:20:08,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:20:08,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:20:08,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:20:08,183 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:20:08,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:20:08,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:20:08,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 04:20:08,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:20:08,284 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:20:08,284 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:20:08,345 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:20:08,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444735399] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:20:08,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1237828967] [2023-11-19 04:20:08,349 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-19 04:20:08,349 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:20:08,349 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:20:08,350 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:20:08,350 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:20:08,838 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:20:09,035 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1379#(and (<= 1 |#StackHeapBarrier|) (<= (select |#length| |ULTIMATE.start_main_~#values~0#1.base|) (+ 3 (* |ULTIMATE.start_main_~v~0#1| 4))) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (<= |ULTIMATE.start_main_#t~nondet10#1| 2147483647) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| 0) (<= 2 |ULTIMATE.start_main_~#values~0#1.base|) (<= 2 |ULTIMATE.start_main_~#set~0#1.base|) (<= 0 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet10#1|)))' at error location [2023-11-19 04:20:09,036 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:20:09,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:20:09,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-19 04:20:09,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44615872] [2023-11-19 04:20:09,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:20:09,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 04:20:09,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:20:09,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 04:20:09,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=197, Unknown=0, NotChecked=0, Total=342 [2023-11-19 04:20:09,039 INFO L87 Difference]: Start difference. First operand 109 states and 154 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:20:09,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:20:09,537 INFO L93 Difference]: Finished difference Result 439 states and 560 transitions. [2023-11-19 04:20:09,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 04:20:09,538 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-19 04:20:09,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:20:09,542 INFO L225 Difference]: With dead ends: 439 [2023-11-19 04:20:09,542 INFO L226 Difference]: Without dead ends: 439 [2023-11-19 04:20:09,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=197, Unknown=0, NotChecked=0, Total=342 [2023-11-19 04:20:09,544 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 589 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:20:09,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [609 Valid, 269 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:20:09,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2023-11-19 04:20:09,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 121. [2023-11-19 04:20:09,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 99 states have (on average 1.5151515151515151) internal successors, (150), 111 states have internal predecessors, (150), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 04:20:09,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 166 transitions. [2023-11-19 04:20:09,562 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 166 transitions. Word has length 15 [2023-11-19 04:20:09,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:20:09,563 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 166 transitions. [2023-11-19 04:20:09,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:20:09,563 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 166 transitions. [2023-11-19 04:20:09,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-19 04:20:09,564 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:20:09,564 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1] [2023-11-19 04:20:09,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 04:20:09,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 04:20:09,780 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-19 04:20:09,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:20:09,781 INFO L85 PathProgramCache]: Analyzing trace with hash 801248177, now seen corresponding path program 2 times [2023-11-19 04:20:09,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:20:09,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263675282] [2023-11-19 04:20:09,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:20:09,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:20:09,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:20:10,056 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:20:10,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:20:10,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263675282] [2023-11-19 04:20:10,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263675282] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:20:10,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469361985] [2023-11-19 04:20:10,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 04:20:10,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:20:10,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:20:10,058 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:20:10,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 04:20:10,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 04:20:10,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:20:10,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 04:20:10,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:20:10,158 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 [2023-11-19 04:20:10,226 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-19 04:20:10,227 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:20:10,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469361985] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:20:10,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:20:10,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [12] total 16 [2023-11-19 04:20:10,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150112607] [2023-11-19 04:20:10,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:20:10,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:20:10,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:20:10,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:20:10,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2023-11-19 04:20:10,230 INFO L87 Difference]: Start difference. First operand 121 states and 166 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:20:10,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:20:10,378 INFO L93 Difference]: Finished difference Result 165 states and 230 transitions. [2023-11-19 04:20:10,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:20:10,379 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-19 04:20:10,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:20:10,381 INFO L225 Difference]: With dead ends: 165 [2023-11-19 04:20:10,381 INFO L226 Difference]: Without dead ends: 165 [2023-11-19 04:20:10,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2023-11-19 04:20:10,382 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 57 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:20:10,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 78 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:20:10,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-11-19 04:20:10,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 127. [2023-11-19 04:20:10,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 106 states have (on average 1.5188679245283019) internal successors, (161), 117 states have internal predecessors, (161), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 04:20:10,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 177 transitions. [2023-11-19 04:20:10,392 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 177 transitions. Word has length 27 [2023-11-19 04:20:10,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:20:10,393 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 177 transitions. [2023-11-19 04:20:10,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:20:10,393 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 177 transitions. [2023-11-19 04:20:10,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-19 04:20:10,397 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:20:10,397 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:20:10,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 04:20:10,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:20:10,598 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-19 04:20:10,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:20:10,598 INFO L85 PathProgramCache]: Analyzing trace with hash -930930034, now seen corresponding path program 1 times [2023-11-19 04:20:10,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:20:10,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431066112] [2023-11-19 04:20:10,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:20:10,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:20:10,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:20:10,683 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-19 04:20:10,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:20:10,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431066112] [2023-11-19 04:20:10,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431066112] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:20:10,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434844369] [2023-11-19 04:20:10,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:20:10,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:20:10,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:20:10,686 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:20:10,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 04:20:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:20:10,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 04:20:10,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:20:10,932 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:20:10,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:20:11,197 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:20:11,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434844369] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:20:11,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2005910857] [2023-11-19 04:20:11,200 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-19 04:20:11,200 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:20:11,200 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:20:11,200 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:20:11,201 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:20:11,699 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:20:11,944 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2519#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| 0) (= |ULTIMATE.start_main_~v~0#1| 0) (<= 2 |ULTIMATE.start_main_~#values~0#1.base|) (<= 2 |ULTIMATE.start_main_~#set~0#1.base|) (<= (select |#length| |ULTIMATE.start_main_~#values~0#1.base|) 3) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2023-11-19 04:20:11,944 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:20:11,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:20:11,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 12, 12] total 26 [2023-11-19 04:20:11,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377672937] [2023-11-19 04:20:11,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:20:11,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-19 04:20:11,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:20:11,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-19 04:20:11,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=633, Unknown=0, NotChecked=0, Total=1056 [2023-11-19 04:20:11,947 INFO L87 Difference]: Start difference. First operand 127 states and 177 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:20:14,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:20:14,850 INFO L93 Difference]: Finished difference Result 1659 states and 2164 transitions. [2023-11-19 04:20:14,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-11-19 04:20:14,851 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-11-19 04:20:14,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:20:14,866 INFO L225 Difference]: With dead ends: 1659 [2023-11-19 04:20:14,866 INFO L226 Difference]: Without dead ends: 1659 [2023-11-19 04:20:14,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1611 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1886, Invalid=3966, Unknown=0, NotChecked=0, Total=5852 [2023-11-19 04:20:14,871 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 5328 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 717 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5374 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 1381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 717 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:20:14,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5374 Valid, 476 Invalid, 1381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [717 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-19 04:20:14,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2023-11-19 04:20:14,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 186. [2023-11-19 04:20:14,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 161 states have (on average 1.4409937888198758) internal successors, (232), 172 states have internal predecessors, (232), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-19 04:20:14,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 256 transitions. [2023-11-19 04:20:14,923 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 256 transitions. Word has length 28 [2023-11-19 04:20:14,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:20:14,923 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 256 transitions. [2023-11-19 04:20:14,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:20:14,924 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 256 transitions. [2023-11-19 04:20:14,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-19 04:20:14,928 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:20:14,928 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-19 04:20:14,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 04:20:15,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:20:15,145 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-19 04:20:15,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:20:15,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1554291064, now seen corresponding path program 2 times [2023-11-19 04:20:15,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:20:15,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883179275] [2023-11-19 04:20:15,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:20:15,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:20:15,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:20:15,416 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2023-11-19 04:20:15,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:20:15,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883179275] [2023-11-19 04:20:15,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883179275] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:20:15,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279215132] [2023-11-19 04:20:15,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 04:20:15,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:20:15,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:20:15,419 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:20:15,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 04:20:15,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-19 04:20:15,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:20:15,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 04:20:15,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:20:15,555 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 [2023-11-19 04:20:15,609 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 488 trivial. 0 not checked. [2023-11-19 04:20:15,609 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:20:15,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279215132] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:20:15,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:20:15,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-11-19 04:20:15,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47923503] [2023-11-19 04:20:15,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:20:15,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:20:15,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:20:15,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:20:15,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:20:15,614 INFO L87 Difference]: Start difference. First operand 186 states and 256 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:20:15,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:20:15,717 INFO L93 Difference]: Finished difference Result 190 states and 254 transitions. [2023-11-19 04:20:15,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:20:15,718 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2023-11-19 04:20:15,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:20:15,724 INFO L225 Difference]: With dead ends: 190 [2023-11-19 04:20:15,724 INFO L226 Difference]: Without dead ends: 190 [2023-11-19 04:20:15,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:20:15,728 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 85 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:20:15,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 42 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:20:15,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-11-19 04:20:15,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 184. [2023-11-19 04:20:15,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 161 states have (on average 1.4285714285714286) internal successors, (230), 170 states have internal predecessors, (230), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-19 04:20:15,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 254 transitions. [2023-11-19 04:20:15,738 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 254 transitions. Word has length 54 [2023-11-19 04:20:15,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:20:15,739 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 254 transitions. [2023-11-19 04:20:15,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:20:15,740 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 254 transitions. [2023-11-19 04:20:15,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-19 04:20:15,743 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:20:15,744 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:20:15,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 04:20:15,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-19 04:20:15,965 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-19 04:20:15,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:20:15,965 INFO L85 PathProgramCache]: Analyzing trace with hash -974753642, now seen corresponding path program 1 times [2023-11-19 04:20:15,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:20:15,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942883226] [2023-11-19 04:20:15,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:20:15,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:20:16,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:20:16,905 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 04:20:16,905 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:20:16,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942883226] [2023-11-19 04:20:16,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942883226] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:20:16,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660067063] [2023-11-19 04:20:16,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:20:16,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:20:16,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:20:16,907 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:20:16,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 04:20:17,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:20:17,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-19 04:20:17,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:20:17,170 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 04:20:17,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:20:18,088 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 04:20:18,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660067063] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:20:18,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [596181469] [2023-11-19 04:20:18,091 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-19 04:20:18,091 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:20:18,091 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:20:18,091 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:20:18,091 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:20:18,574 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:20:18,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [596181469] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:20:18,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:20:18,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [24, 24, 24] total 55 [2023-11-19 04:20:18,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095659620] [2023-11-19 04:20:18,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:20:18,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 04:20:18,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:20:18,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 04:20:18,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1439, Invalid=1641, Unknown=0, NotChecked=0, Total=3080 [2023-11-19 04:20:18,871 INFO L87 Difference]: Start difference. First operand 184 states and 254 transitions. Second operand has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:20:19,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:20:19,163 INFO L93 Difference]: Finished difference Result 190 states and 252 transitions. [2023-11-19 04:20:19,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 04:20:19,164 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-11-19 04:20:19,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:20:19,166 INFO L225 Difference]: With dead ends: 190 [2023-11-19 04:20:19,166 INFO L226 Difference]: Without dead ends: 190 [2023-11-19 04:20:19,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1545, Invalid=1761, Unknown=0, NotChecked=0, Total=3306 [2023-11-19 04:20:19,169 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 25 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:20:19,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 155 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:20:19,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-11-19 04:20:19,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 182. [2023-11-19 04:20:19,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 159 states have (on average 1.4088050314465408) internal successors, (224), 168 states have internal predecessors, (224), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-19 04:20:19,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 248 transitions. [2023-11-19 04:20:19,177 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 248 transitions. Word has length 56 [2023-11-19 04:20:19,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:20:19,178 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 248 transitions. [2023-11-19 04:20:19,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:20:19,179 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 248 transitions. [2023-11-19 04:20:19,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-19 04:20:19,180 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:20:19,180 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:20:19,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 04:20:19,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 04:20:19,396 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-19 04:20:19,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:20:19,397 INFO L85 PathProgramCache]: Analyzing trace with hash -458948485, now seen corresponding path program 1 times [2023-11-19 04:20:19,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:20:19,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218816079] [2023-11-19 04:20:19,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:20:19,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:20:19,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:20:19,556 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 488 trivial. 0 not checked. [2023-11-19 04:20:19,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:20:19,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218816079] [2023-11-19 04:20:19,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218816079] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:20:19,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:20:19,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:20:19,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127023546] [2023-11-19 04:20:19,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:20:19,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:20:19,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:20:19,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:20:19,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:20:19,560 INFO L87 Difference]: Start difference. First operand 182 states and 248 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:20:19,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:20:19,632 INFO L93 Difference]: Finished difference Result 223 states and 302 transitions. [2023-11-19 04:20:19,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:20:19,632 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-11-19 04:20:19,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:20:19,635 INFO L225 Difference]: With dead ends: 223 [2023-11-19 04:20:19,635 INFO L226 Difference]: Without dead ends: 223 [2023-11-19 04:20:19,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:20:19,636 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 24 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:20:19,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 137 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:20:19,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2023-11-19 04:20:19,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 155. [2023-11-19 04:20:19,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 136 states have (on average 1.3455882352941178) internal successors, (183), 145 states have internal predecessors, (183), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 04:20:19,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 199 transitions. [2023-11-19 04:20:19,644 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 199 transitions. Word has length 59 [2023-11-19 04:20:19,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:20:19,644 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 199 transitions. [2023-11-19 04:20:19,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:20:19,645 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 199 transitions. [2023-11-19 04:20:19,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-19 04:20:19,646 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:20:19,646 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:20:19,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 04:20:19,647 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-19 04:20:19,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:20:19,647 INFO L85 PathProgramCache]: Analyzing trace with hash -654004169, now seen corresponding path program 1 times [2023-11-19 04:20:19,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:20:19,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336938558] [2023-11-19 04:20:19,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:20:19,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:20:19,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:20:20,089 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 487 trivial. 0 not checked. [2023-11-19 04:20:20,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:20:20,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336938558] [2023-11-19 04:20:20,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336938558] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:20:20,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037336866] [2023-11-19 04:20:20,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:20:20,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:20:20,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:20:20,092 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:20:20,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 04:20:20,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:20:20,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-19 04:20:20,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:20:20,773 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-19 04:20:20,773 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:20:21,796 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-19 04:20:21,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037336866] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:20:21,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1283547283] [2023-11-19 04:20:21,799 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-19 04:20:21,799 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:20:21,800 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:20:21,800 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:20:21,800 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:20:22,503 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:20:23,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1283547283] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:20:23,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:20:23,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [3, 24, 24] total 60 [2023-11-19 04:20:23,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661107736] [2023-11-19 04:20:23,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:20:23,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 04:20:23,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:20:23,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 04:20:23,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1551, Invalid=2109, Unknown=0, NotChecked=0, Total=3660 [2023-11-19 04:20:23,119 INFO L87 Difference]: Start difference. First operand 155 states and 199 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:20:23,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:20:23,318 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2023-11-19 04:20:23,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 04:20:23,319 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-11-19 04:20:23,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:20:23,320 INFO L225 Difference]: With dead ends: 70 [2023-11-19 04:20:23,320 INFO L226 Difference]: Without dead ends: 70 [2023-11-19 04:20:23,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1655, Invalid=2251, Unknown=0, NotChecked=0, Total=3906 [2023-11-19 04:20:23,323 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:20:23,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 5 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:20:23,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-19 04:20:23,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2023-11-19 04:20:23,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 69 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:20:23,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2023-11-19 04:20:23,327 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 63 [2023-11-19 04:20:23,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:20:23,327 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2023-11-19 04:20:23,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:20:23,328 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2023-11-19 04:20:23,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-19 04:20:23,329 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:20:23,329 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:20:23,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 04:20:23,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:20:23,540 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-19 04:20:23,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:20:23,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1579827120, now seen corresponding path program 1 times [2023-11-19 04:20:23,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:20:23,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442642181] [2023-11-19 04:20:23,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:20:23,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:20:23,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:20:24,451 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-19 04:20:24,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:20:24,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442642181] [2023-11-19 04:20:24,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442642181] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:20:24,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711380795] [2023-11-19 04:20:24,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:20:24,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:20:24,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:20:24,454 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:20:24,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 04:20:24,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:20:24,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-19 04:20:24,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:20:24,737 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-19 04:20:24,738 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:20:25,729 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-19 04:20:25,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711380795] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:20:25,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [607604446] [2023-11-19 04:20:25,732 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-19 04:20:25,732 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:20:25,732 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:20:25,733 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:20:25,733 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:20:26,364 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:20:27,048 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7179#(and (<= 1 |#StackHeapBarrier|) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= 0 |ULTIMATE.start_elem_exists_#res#1|) (= |ULTIMATE.start_main_~n~0#1| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (exists ((|v_ULTIMATE.start_main_~#set~0#1.base_43| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_39| Int) (|v_#valid_83| (Array Int Int))) (and (= (select |v_#valid_83| |v_ULTIMATE.start_main_~#values~0#1.base_39|) 1) (= (store (store |v_#valid_83| |v_ULTIMATE.start_main_~#set~0#1.base_43| 0) |v_ULTIMATE.start_main_~#values~0#1.base_39| 0) |#valid|) (<= 2 |v_ULTIMATE.start_main_~#values~0#1.base_39|) (<= (* |ULTIMATE.start_main_~v~0#1| 4) (select |#length| |v_ULTIMATE.start_main_~#values~0#1.base_39|)) (<= 2 |v_ULTIMATE.start_main_~#set~0#1.base_43|))) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2023-11-19 04:20:27,048 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:20:27,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:20:27,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2023-11-19 04:20:27,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134271774] [2023-11-19 04:20:27,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:20:27,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-19 04:20:27,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:20:27,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-19 04:20:27,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1752, Invalid=2030, Unknown=0, NotChecked=0, Total=3782 [2023-11-19 04:20:27,054 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 48 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:20:27,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:20:27,255 INFO L93 Difference]: Finished difference Result 118 states and 120 transitions. [2023-11-19 04:20:27,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-19 04:20:27,256 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 48 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2023-11-19 04:20:27,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:20:27,257 INFO L225 Difference]: With dead ends: 118 [2023-11-19 04:20:27,257 INFO L226 Difference]: Without dead ends: 118 [2023-11-19 04:20:27,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1255 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1752, Invalid=2030, Unknown=0, NotChecked=0, Total=3782 [2023-11-19 04:20:27,262 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 62 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:20:27,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 6 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:20:27,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-11-19 04:20:27,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2023-11-19 04:20:27,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.0256410256410255) internal successors, (120), 117 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:20:27,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2023-11-19 04:20:27,275 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 69 [2023-11-19 04:20:27,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:20:27,275 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2023-11-19 04:20:27,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 48 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:20:27,277 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2023-11-19 04:20:27,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-11-19 04:20:27,285 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:20:27,285 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:20:27,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 04:20:27,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:20:27,501 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-19 04:20:27,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:20:27,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1208990848, now seen corresponding path program 2 times [2023-11-19 04:20:27,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:20:27,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699915679] [2023-11-19 04:20:27,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:20:27,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:20:27,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:20:30,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2129 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-19 04:20:30,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:20:30,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699915679] [2023-11-19 04:20:30,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699915679] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:20:30,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415020872] [2023-11-19 04:20:30,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 04:20:30,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:20:30,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:20:30,284 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:20:30,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 04:20:30,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-19 04:20:30,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:20:30,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 04:20:30,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:20:31,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2129 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2129 trivial. 0 not checked. [2023-11-19 04:20:31,625 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:20:31,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415020872] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:20:31,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:20:31,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [48] total 51 [2023-11-19 04:20:31,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138443125] [2023-11-19 04:20:31,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:20:31,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:20:31,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:20:31,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:20:31,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1182, Invalid=1470, Unknown=0, NotChecked=0, Total=2652 [2023-11-19 04:20:31,629 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:20:31,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:20:31,736 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2023-11-19 04:20:31,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:20:31,737 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2023-11-19 04:20:31,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:20:31,738 INFO L225 Difference]: With dead ends: 117 [2023-11-19 04:20:31,738 INFO L226 Difference]: Without dead ends: 0 [2023-11-19 04:20:31,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1182, Invalid=1470, Unknown=0, NotChecked=0, Total=2652 [2023-11-19 04:20:31,740 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:20:31,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:20:31,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-19 04:20:31,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-19 04:20:31,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:20:31,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-19 04:20:31,741 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 117 [2023-11-19 04:20:31,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:20:31,741 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-19 04:20:31,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:20:31,741 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-19 04:20:31,741 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-19 04:20:31,744 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 26 remaining) [2023-11-19 04:20:31,744 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 26 remaining) [2023-11-19 04:20:31,745 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 26 remaining) [2023-11-19 04:20:31,745 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 26 remaining) [2023-11-19 04:20:31,745 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 26 remaining) [2023-11-19 04:20:31,745 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 26 remaining) [2023-11-19 04:20:31,745 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 26 remaining) [2023-11-19 04:20:31,745 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 26 remaining) [2023-11-19 04:20:31,745 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 26 remaining) [2023-11-19 04:20:31,746 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 26 remaining) [2023-11-19 04:20:31,746 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 26 remaining) [2023-11-19 04:20:31,746 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 26 remaining) [2023-11-19 04:20:31,746 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 26 remaining) [2023-11-19 04:20:31,746 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 26 remaining) [2023-11-19 04:20:31,746 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 26 remaining) [2023-11-19 04:20:31,747 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 26 remaining) [2023-11-19 04:20:31,747 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 26 remaining) [2023-11-19 04:20:31,747 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 26 remaining) [2023-11-19 04:20:31,747 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 26 remaining) [2023-11-19 04:20:31,747 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 26 remaining) [2023-11-19 04:20:31,747 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 26 remaining) [2023-11-19 04:20:31,747 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 26 remaining) [2023-11-19 04:20:31,748 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 26 remaining) [2023-11-19 04:20:31,748 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 26 remaining) [2023-11-19 04:20:31,749 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK (1 of 26 remaining) [2023-11-19 04:20:31,749 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 26 remaining) [2023-11-19 04:20:31,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 04:20:31,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:20:31,953 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:20:31,955 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-19 04:20:31,965 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 04:20:31 BoogieIcfgContainer [2023-11-19 04:20:31,965 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-19 04:20:31,966 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-19 04:20:31,966 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-19 04:20:31,966 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-19 04:20:31,967 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:20:02" (3/4) ... [2023-11-19 04:20:31,969 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-19 04:20:31,974 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2023-11-19 04:20:31,987 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 33 nodes and edges [2023-11-19 04:20:31,989 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2023-11-19 04:20:31,989 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-11-19 04:20:31,990 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-11-19 04:20:32,114 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/witness.graphml [2023-11-19 04:20:32,114 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/witness.yml [2023-11-19 04:20:32,115 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-19 04:20:32,115 INFO L158 Benchmark]: Toolchain (without parser) took 30812.00ms. Allocated memory was 159.4MB in the beginning and 352.3MB in the end (delta: 192.9MB). Free memory was 128.7MB in the beginning and 151.0MB in the end (delta: -22.3MB). Peak memory consumption was 172.3MB. Max. memory is 16.1GB. [2023-11-19 04:20:32,116 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 115.3MB. Free memory was 74.4MB in the beginning and 74.2MB in the end (delta: 128.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-19 04:20:32,116 INFO L158 Benchmark]: CACSL2BoogieTranslator took 317.03ms. Allocated memory is still 159.4MB. Free memory was 128.7MB in the beginning and 117.0MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-19 04:20:32,117 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.64ms. Allocated memory is still 159.4MB. Free memory was 117.0MB in the beginning and 115.7MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 04:20:32,117 INFO L158 Benchmark]: Boogie Preprocessor took 39.40ms. Allocated memory is still 159.4MB. Free memory was 115.7MB in the beginning and 113.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-19 04:20:32,118 INFO L158 Benchmark]: RCFGBuilder took 760.26ms. Allocated memory is still 159.4MB. Free memory was 113.6MB in the beginning and 87.6MB in the end (delta: 25.9MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2023-11-19 04:20:32,118 INFO L158 Benchmark]: TraceAbstraction took 29485.71ms. Allocated memory was 159.4MB in the beginning and 352.3MB in the end (delta: 192.9MB). Free memory was 86.9MB in the beginning and 157.3MB in the end (delta: -70.4MB). Peak memory consumption was 124.1MB. Max. memory is 16.1GB. [2023-11-19 04:20:32,119 INFO L158 Benchmark]: Witness Printer took 148.66ms. Allocated memory is still 352.3MB. Free memory was 157.3MB in the beginning and 151.0MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-11-19 04:20:32,121 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 115.3MB. Free memory was 74.4MB in the beginning and 74.2MB in the end (delta: 128.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 317.03ms. Allocated memory is still 159.4MB. Free memory was 128.7MB in the beginning and 117.0MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 51.64ms. Allocated memory is still 159.4MB. Free memory was 117.0MB in the beginning and 115.7MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 39.40ms. Allocated memory is still 159.4MB. Free memory was 115.7MB in the beginning and 113.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 760.26ms. Allocated memory is still 159.4MB. Free memory was 113.6MB in the beginning and 87.6MB in the end (delta: 25.9MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * TraceAbstraction took 29485.71ms. Allocated memory was 159.4MB in the beginning and 352.3MB in the end (delta: 192.9MB). Free memory was 86.9MB in the beginning and 157.3MB in the end (delta: -70.4MB). Peak memory consumption was 124.1MB. Max. memory is 16.1GB. * Witness Printer took 148.66ms. Allocated memory is still 352.3MB. Free memory was 157.3MB in the beginning and 151.0MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 27]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 12]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 68 locations, 26 error locations. Started 1 CEGAR loops. OverallTime: 29.4s, OverallIterations: 14, TraceHistogramMax: 46, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 6.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6758 SdHoareTripleChecker+Valid, 3.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6673 mSDsluCounter, 1669 SdHoareTripleChecker+Invalid, 3.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1239 mSDsCounter, 972 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2387 IncrementalHoareTripleChecker+Invalid, 3359 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 972 mSolverCounterUnsat, 430 mSDtfsCounter, 2387 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1123 GetRequests, 748 SyntacticMatches, 2 SemanticMatches, 373 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4995 ImplicationChecksByTransitivity, 9.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=186occurred in iteration=8, InterpolantAutomatonStates: 197, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 14 MinimizatonAttempts, 2016 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 12.2s InterpolantComputationTime, 972 NumberOfCodeBlocks, 796 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 1190 ConstructedInterpolants, 22 QuantifiedInterpolants, 5340 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1970 ConjunctsInSsa, 133 ConjunctsInUnsatCore, 31 InterpolantComputations, 7 PerfectInterpolantSequences, 4386/10781 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 1.6s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 3, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 35, DAG_INTERPRETER_EARLY_EXITS: 2, TOOLS_POST_APPLICATIONS: 85, TOOLS_POST_TIME: 1.2s, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 85, TOOLS_QUANTIFIERELIM_TIME: 1.1s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 159, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 11, DOMAIN_JOIN_TIME: 0.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 12, DOMAIN_WIDEN_TIME: 0.2s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 18, DOMAIN_ISSUBSETEQ_TIME: 0.1s, DOMAIN_ISBOTTOM_APPLICATIONS: 35, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 6, LOOP_SUMMARIZER_CACHE_MISSES: 6, LOOP_SUMMARIZER_OVERALL_TIME: 1.2s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 1.2s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 18, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 533, DAG_COMPRESSION_RETAINED_NODES: 110, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 26 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-19 04:20:32,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170724e6-81f7-46ad-b343-3acb291a7ac5/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE