./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0237.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b 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_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0237.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp --witnessprinter.witness.filename witness.graphml --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 59c31190ccc8063bc9e40e87ef868627685497d396c28c826c00fa8abad7dfea --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 20:31:14,164 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 20:31:14,260 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-06 20:31:14,268 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 20:31:14,269 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 20:31:14,321 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 20:31:14,322 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 20:31:14,322 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 20:31:14,324 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 20:31:14,329 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 20:31:14,329 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 20:31:14,331 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 20:31:14,331 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 20:31:14,333 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 20:31:14,334 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 20:31:14,334 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 20:31:14,335 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 20:31:14,335 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 20:31:14,335 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 20:31:14,336 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 20:31:14,336 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 20:31:14,337 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 20:31:14,338 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 20:31:14,338 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 20:31:14,339 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 20:31:14,340 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 20:31:14,340 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 20:31:14,341 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 20:31:14,341 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 20:31:14,342 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 20:31:14,343 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 20:31:14,343 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 20:31:14,344 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 20:31:14,344 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 20:31:14,344 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 20:31:14,344 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 20:31:14,345 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 20:31:14,345 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 20:31:14,345 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 20:31:14,346 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:31:14,346 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 20:31:14,347 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 20:31:14,347 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 20:31:14,347 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 20:31:14,348 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 20:31:14,348 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 20:31:14,348 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_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 59c31190ccc8063bc9e40e87ef868627685497d396c28c826c00fa8abad7dfea [2023-11-06 20:31:14,657 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 20:31:14,679 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 20:31:14,682 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 20:31:14,683 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 20:31:14,684 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 20:31:14,685 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/memsafety/test-0237.i [2023-11-06 20:31:17,821 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 20:31:18,234 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 20:31:18,235 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/sv-benchmarks/c/memsafety/test-0237.i [2023-11-06 20:31:18,268 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/data/e542301a2/cf20372c14f54e63818885d4d5d903a0/FLAG94bab0584 [2023-11-06 20:31:18,285 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/data/e542301a2/cf20372c14f54e63818885d4d5d903a0 [2023-11-06 20:31:18,290 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 20:31:18,292 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 20:31:18,293 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 20:31:18,294 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 20:31:18,300 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 20:31:18,301 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:31:18" (1/1) ... [2023-11-06 20:31:18,302 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5813c84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:18, skipping insertion in model container [2023-11-06 20:31:18,302 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:31:18" (1/1) ... [2023-11-06 20:31:18,378 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 20:31:18,904 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:31:18,922 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 20:31:18,992 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:31:19,043 INFO L206 MainTranslator]: Completed translation [2023-11-06 20:31:19,044 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:19 WrapperNode [2023-11-06 20:31:19,044 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 20:31:19,045 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 20:31:19,045 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 20:31:19,046 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 20:31:19,054 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:19" (1/1) ... [2023-11-06 20:31:19,075 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:19" (1/1) ... [2023-11-06 20:31:19,113 INFO L138 Inliner]: procedures = 188, calls = 66, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 221 [2023-11-06 20:31:19,114 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 20:31:19,115 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 20:31:19,115 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 20:31:19,115 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 20:31:19,125 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:19" (1/1) ... [2023-11-06 20:31:19,126 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:19" (1/1) ... [2023-11-06 20:31:19,131 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:19" (1/1) ... [2023-11-06 20:31:19,132 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:19" (1/1) ... [2023-11-06 20:31:19,145 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:19" (1/1) ... [2023-11-06 20:31:19,150 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:19" (1/1) ... [2023-11-06 20:31:19,153 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:19" (1/1) ... [2023-11-06 20:31:19,156 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:19" (1/1) ... [2023-11-06 20:31:19,161 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 20:31:19,162 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 20:31:19,162 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 20:31:19,162 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 20:31:19,163 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:19" (1/1) ... [2023-11-06 20:31:19,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:31:19,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:31:19,207 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 20:31:19,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 20:31:19,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 20:31:19,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 20:31:19,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-06 20:31:19,247 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-06 20:31:19,248 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2023-11-06 20:31:19,248 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2023-11-06 20:31:19,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 20:31:19,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-06 20:31:19,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 20:31:19,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 20:31:19,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 20:31:19,425 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 20:31:19,427 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 20:31:20,068 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 20:31:20,174 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 20:31:20,175 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-06 20:31:20,178 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:31:20 BoogieIcfgContainer [2023-11-06 20:31:20,178 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 20:31:20,182 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 20:31:20,182 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 20:31:20,186 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 20:31:20,186 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 08:31:18" (1/3) ... [2023-11-06 20:31:20,189 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bf410a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:31:20, skipping insertion in model container [2023-11-06 20:31:20,189 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:19" (2/3) ... [2023-11-06 20:31:20,190 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bf410a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:31:20, skipping insertion in model container [2023-11-06 20:31:20,191 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:31:20" (3/3) ... [2023-11-06 20:31:20,192 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0237.i [2023-11-06 20:31:20,213 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 20:31:20,214 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 87 error locations. [2023-11-06 20:31:20,280 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 20:31:20,287 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;@4f23987a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 20:31:20,287 INFO L358 AbstractCegarLoop]: Starting to check reachability of 87 error locations. [2023-11-06 20:31:20,293 INFO L276 IsEmpty]: Start isEmpty. Operand has 177 states, 82 states have (on average 2.317073170731707) internal successors, (190), 169 states have internal predecessors, (190), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-06 20:31:20,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-06 20:31:20,301 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:31:20,301 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-06 20:31:20,302 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-06 20:31:20,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:31:20,310 INFO L85 PathProgramCache]: Analyzing trace with hash 374307, now seen corresponding path program 1 times [2023-11-06 20:31:20,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:31:20,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439002937] [2023-11-06 20:31:20,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:20,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:31:20,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:31:20,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:31:20,496 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:31:20,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439002937] [2023-11-06 20:31:20,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439002937] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:31:20,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:31:20,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 20:31:20,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886905560] [2023-11-06 20:31:20,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:31:20,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 20:31:20,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:31:20,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 20:31:20,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 20:31:20,566 INFO L87 Difference]: Start difference. First operand has 177 states, 82 states have (on average 2.317073170731707) internal successors, (190), 169 states have internal predecessors, (190), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 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) [2023-11-06 20:31:20,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:31:20,650 INFO L93 Difference]: Finished difference Result 177 states and 192 transitions. [2023-11-06 20:31:20,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 20:31:20,653 INFO L78 Accepts]: Start accepts. Automaton has has 2 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 [2023-11-06 20:31:20,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:31:20,663 INFO L225 Difference]: With dead ends: 177 [2023-11-06 20:31:20,664 INFO L226 Difference]: Without dead ends: 176 [2023-11-06 20:31:20,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 20:31:20,670 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:31:20,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 167 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:31:20,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2023-11-06 20:31:20,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2023-11-06 20:31:20,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 82 states have (on average 2.182926829268293) internal successors, (179), 168 states have internal predecessors, (179), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-06 20:31:20,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 191 transitions. [2023-11-06 20:31:20,723 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 191 transitions. Word has length 3 [2023-11-06 20:31:20,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:31:20,723 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 191 transitions. [2023-11-06 20:31:20,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 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) [2023-11-06 20:31:20,724 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 191 transitions. [2023-11-06 20:31:20,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-06 20:31:20,725 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:31:20,725 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 20:31:20,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 20:31:20,726 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-06 20:31:20,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:31:20,727 INFO L85 PathProgramCache]: Analyzing trace with hash 355142826, now seen corresponding path program 1 times [2023-11-06 20:31:20,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:31:20,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411819875] [2023-11-06 20:31:20,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:20,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:31:20,746 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 20:31:20,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [720015939] [2023-11-06 20:31:20,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:20,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:31:20,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:31:20,752 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:31:20,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 20:31:20,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:31:20,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 20:31:20,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:31:20,925 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 20:31:20,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:31:20,936 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:31:20,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:31:20,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411819875] [2023-11-06 20:31:20,937 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 20:31:20,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720015939] [2023-11-06 20:31:20,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720015939] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:31:20,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:31:20,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 20:31:20,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604496836] [2023-11-06 20:31:20,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:31:20,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:31:20,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:31:20,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:31:20,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:31:20,946 INFO L87 Difference]: Start difference. First operand 176 states and 191 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:31:21,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:31:21,186 INFO L93 Difference]: Finished difference Result 175 states and 190 transitions. [2023-11-06 20:31:21,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:31:21,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-06 20:31:21,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:31:21,189 INFO L225 Difference]: With dead ends: 175 [2023-11-06 20:31:21,189 INFO L226 Difference]: Without dead ends: 175 [2023-11-06 20:31:21,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:31:21,191 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 4 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:31:21,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 266 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:31:21,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-11-06 20:31:21,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2023-11-06 20:31:21,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 82 states have (on average 2.1707317073170733) internal successors, (178), 167 states have internal predecessors, (178), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-06 20:31:21,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 190 transitions. [2023-11-06 20:31:21,214 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 190 transitions. Word has length 5 [2023-11-06 20:31:21,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:31:21,214 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 190 transitions. [2023-11-06 20:31:21,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:31:21,215 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 190 transitions. [2023-11-06 20:31:21,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-06 20:31:21,215 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:31:21,215 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 20:31:21,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 20:31:21,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:31:21,416 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-06 20:31:21,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:31:21,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1875473933, now seen corresponding path program 1 times [2023-11-06 20:31:21,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:31:21,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639399432] [2023-11-06 20:31:21,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:21,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:31:21,430 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 20:31:21,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1574438944] [2023-11-06 20:31:21,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:21,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:31:21,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:31:21,432 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:31:21,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 20:31:21,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:31:21,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 20:31:21,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:31:21,598 INFO L351 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 7 [2023-11-06 20:31:21,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:31:21,625 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:31:21,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:31:21,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639399432] [2023-11-06 20:31:21,626 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 20:31:21,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574438944] [2023-11-06 20:31:21,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574438944] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:31:21,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:31:21,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 20:31:21,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880496637] [2023-11-06 20:31:21,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:31:21,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:31:21,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:31:21,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:31:21,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:31:21,629 INFO L87 Difference]: Start difference. First operand 175 states and 190 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:31:21,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:31:21,843 INFO L93 Difference]: Finished difference Result 180 states and 195 transitions. [2023-11-06 20:31:21,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 20:31:21,844 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-06 20:31:21,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:31:21,845 INFO L225 Difference]: With dead ends: 180 [2023-11-06 20:31:21,846 INFO L226 Difference]: Without dead ends: 180 [2023-11-06 20:31:21,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:31:21,847 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 7 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:31:21,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 435 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:31:21,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-11-06 20:31:21,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2023-11-06 20:31:21,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 86 states have (on average 2.127906976744186) internal successors, (183), 171 states have internal predecessors, (183), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-06 20:31:21,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 195 transitions. [2023-11-06 20:31:21,890 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 195 transitions. Word has length 6 [2023-11-06 20:31:21,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:31:21,891 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 195 transitions. [2023-11-06 20:31:21,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:31:21,891 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 195 transitions. [2023-11-06 20:31:21,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-06 20:31:21,892 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:31:21,892 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:31:21,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 20:31:22,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:31:22,093 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-06 20:31:22,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:31:22,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1708028809, now seen corresponding path program 1 times [2023-11-06 20:31:22,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:31:22,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291019205] [2023-11-06 20:31:22,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:22,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:31:22,119 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 20:31:22,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2021015513] [2023-11-06 20:31:22,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:22,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:31:22,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:31:22,124 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:31:22,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 20:31:22,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:31:22,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 20:31:22,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:31:22,361 INFO L351 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 [2023-11-06 20:31:22,434 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-06 20:31:22,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:31:22,535 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:31:22,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:31:22,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291019205] [2023-11-06 20:31:22,536 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 20:31:22,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021015513] [2023-11-06 20:31:22,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021015513] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:31:22,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:31:22,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 20:31:22,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558546499] [2023-11-06 20:31:22,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:31:22,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 20:31:22,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:31:22,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 20:31:22,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:31:22,540 INFO L87 Difference]: Start difference. First operand 180 states and 195 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:31:24,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 20:31:26,931 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-06 20:31:29,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:31:29,698 INFO L93 Difference]: Finished difference Result 184 states and 199 transitions. [2023-11-06 20:31:29,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:31:29,699 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-11-06 20:31:29,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:31:29,701 INFO L225 Difference]: With dead ends: 184 [2023-11-06 20:31:29,701 INFO L226 Difference]: Without dead ends: 182 [2023-11-06 20:31:29,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 20:31:29,703 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 4 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:31:29,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 583 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 170 Invalid, 2 Unknown, 0 Unchecked, 7.1s Time] [2023-11-06 20:31:29,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-11-06 20:31:29,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2023-11-06 20:31:29,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 88 states have (on average 2.102272727272727) internal successors, (185), 173 states have internal predecessors, (185), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-06 20:31:29,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 197 transitions. [2023-11-06 20:31:29,715 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 197 transitions. Word has length 14 [2023-11-06 20:31:29,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:31:29,717 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 197 transitions. [2023-11-06 20:31:29,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:31:29,717 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 197 transitions. [2023-11-06 20:31:29,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-06 20:31:29,718 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:31:29,718 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:31:29,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 20:31:29,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:31:29,925 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-06 20:31:29,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:31:29,925 INFO L85 PathProgramCache]: Analyzing trace with hash 835038546, now seen corresponding path program 1 times [2023-11-06 20:31:29,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:31:29,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808388740] [2023-11-06 20:31:29,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:29,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:31:29,959 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 20:31:29,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1859606512] [2023-11-06 20:31:29,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:29,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:31:29,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:31:29,970 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:31:29,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 20:31:30,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:31:30,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 20:31:30,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:31:30,206 INFO L351 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 [2023-11-06 20:31:30,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 20:31:30,234 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:31:30,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:31:30,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808388740] [2023-11-06 20:31:30,235 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 20:31:30,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859606512] [2023-11-06 20:31:30,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859606512] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:31:30,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:31:30,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 20:31:30,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504926834] [2023-11-06 20:31:30,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:31:30,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:31:30,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:31:30,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:31:30,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:31:30,244 INFO L87 Difference]: Start difference. First operand 182 states and 197 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:31:30,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:31:30,486 INFO L93 Difference]: Finished difference Result 188 states and 203 transitions. [2023-11-06 20:31:30,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 20:31:30,486 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-11-06 20:31:30,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:31:30,488 INFO L225 Difference]: With dead ends: 188 [2023-11-06 20:31:30,488 INFO L226 Difference]: Without dead ends: 188 [2023-11-06 20:31:30,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:31:30,489 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 7 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:31:30,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 430 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:31:30,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-11-06 20:31:30,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2023-11-06 20:31:30,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 93 states have (on average 2.053763440860215) internal successors, (191), 178 states have internal predecessors, (191), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-06 20:31:30,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 203 transitions. [2023-11-06 20:31:30,516 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 203 transitions. Word has length 15 [2023-11-06 20:31:30,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:31:30,517 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 203 transitions. [2023-11-06 20:31:30,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:31:30,517 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 203 transitions. [2023-11-06 20:31:30,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-06 20:31:30,520 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:31:30,520 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:31:30,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 20:31:30,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:31:30,727 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-06 20:31:30,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:31:30,727 INFO L85 PathProgramCache]: Analyzing trace with hash 650282360, now seen corresponding path program 1 times [2023-11-06 20:31:30,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:31:30,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012410140] [2023-11-06 20:31:30,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:30,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:31:30,773 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 20:31:30,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1148063586] [2023-11-06 20:31:30,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:30,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:31:30,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:31:30,777 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:31:30,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 20:31:31,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:31:31,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 20:31:31,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:31:31,163 INFO L351 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 7 [2023-11-06 20:31:31,198 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-11-06 20:31:31,198 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:31:31,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:31:31,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012410140] [2023-11-06 20:31:31,199 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 20:31:31,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148063586] [2023-11-06 20:31:31,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148063586] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:31:31,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:31:31,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 20:31:31,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205619080] [2023-11-06 20:31:31,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:31:31,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:31:31,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:31:31,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:31:31,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:31:31,203 INFO L87 Difference]: Start difference. First operand 188 states and 203 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-06 20:31:31,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:31:31,434 INFO L93 Difference]: Finished difference Result 187 states and 202 transitions. [2023-11-06 20:31:31,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 20:31:31,435 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 50 [2023-11-06 20:31:31,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:31:31,436 INFO L225 Difference]: With dead ends: 187 [2023-11-06 20:31:31,436 INFO L226 Difference]: Without dead ends: 187 [2023-11-06 20:31:31,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:31:31,438 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 7 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:31:31,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 415 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:31:31,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-11-06 20:31:31,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2023-11-06 20:31:31,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 93 states have (on average 2.043010752688172) internal successors, (190), 177 states have internal predecessors, (190), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-06 20:31:31,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 202 transitions. [2023-11-06 20:31:31,447 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 202 transitions. Word has length 50 [2023-11-06 20:31:31,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:31:31,447 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 202 transitions. [2023-11-06 20:31:31,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-06 20:31:31,448 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 202 transitions. [2023-11-06 20:31:31,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-06 20:31:31,449 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:31:31,450 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:31:31,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 20:31:31,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:31:31,651 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-06 20:31:31,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:31:31,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1329181019, now seen corresponding path program 1 times [2023-11-06 20:31:31,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:31:31,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499390404] [2023-11-06 20:31:31,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:31,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:31:31,702 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 20:31:31,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1611586494] [2023-11-06 20:31:31,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:31,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:31:31,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:31:31,706 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:31:31,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 20:31:31,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:31:31,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 20:31:31,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:31:32,033 WARN L861 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| 1) |c_#valid|)) is different from true [2023-11-06 20:31:32,076 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-06 20:31:32,077 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-06 20:31:32,108 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 61 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 6 not checked. [2023-11-06 20:31:32,109 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:31:32,378 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 20:31:32,379 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2023-11-06 20:31:32,405 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 61 proven. 7 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-06 20:31:32,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:31:32,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499390404] [2023-11-06 20:31:32,406 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 20:31:32,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611586494] [2023-11-06 20:31:32,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611586494] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:31:32,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [516013388] [2023-11-06 20:31:32,433 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-11-06 20:31:32,434 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:31:32,438 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:31:32,445 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:31:32,445 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:31:34,319 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 65 for LOIs [2023-11-06 20:31:34,685 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:31:36,377 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2974#(and (<= 1 |#StackHeapBarrier|) (= |~#list~0.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (= 3 |ULTIMATE.start_l0_insert_#in~list#1.base|) (= 3 |~#list~0.base|) (= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_l4_insert_~item~0#1.base|) 1)))' at error location [2023-11-06 20:31:36,378 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 20:31:36,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 20:31:36,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2023-11-06 20:31:36,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560479294] [2023-11-06 20:31:36,378 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 20:31:36,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 20:31:36,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:31:36,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 20:31:36,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=450, Unknown=1, NotChecked=42, Total=552 [2023-11-06 20:31:36,380 INFO L87 Difference]: Start difference. First operand 187 states and 202 transitions. Second operand has 12 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-06 20:31:37,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:31:37,060 INFO L93 Difference]: Finished difference Result 183 states and 198 transitions. [2023-11-06 20:31:37,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 20:31:37,061 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 54 [2023-11-06 20:31:37,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:31:37,063 INFO L225 Difference]: With dead ends: 183 [2023-11-06 20:31:37,064 INFO L226 Difference]: Without dead ends: 183 [2023-11-06 20:31:37,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 129 SyntacticMatches, 10 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=71, Invalid=532, Unknown=1, NotChecked=46, Total=650 [2023-11-06 20:31:37,066 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 22 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 827 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 20:31:37,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 827 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 608 Invalid, 0 Unknown, 181 Unchecked, 0.5s Time] [2023-11-06 20:31:37,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2023-11-06 20:31:37,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2023-11-06 20:31:37,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 93 states have (on average 2.0) internal successors, (186), 173 states have internal predecessors, (186), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-06 20:31:37,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 198 transitions. [2023-11-06 20:31:37,076 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 198 transitions. Word has length 54 [2023-11-06 20:31:37,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:31:37,079 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 198 transitions. [2023-11-06 20:31:37,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-06 20:31:37,079 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 198 transitions. [2023-11-06 20:31:37,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-06 20:31:37,083 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:31:37,084 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:31:37,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 20:31:37,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:31:37,293 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-11-06 20:31:37,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:31:37,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1329181020, now seen corresponding path program 1 times [2023-11-06 20:31:37,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:31:37,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973653545] [2023-11-06 20:31:37,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:37,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:31:37,337 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 20:31:37,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [87890250] [2023-11-06 20:31:37,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:37,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:31:37,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:31:37,339 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:31:37,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aee05d1e-8c10-4ea9-8985-be28c08ce15c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 20:31:37,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:31:37,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 20:31:37,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:31:37,776 INFO L351 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 [2023-11-06 20:31:37,853 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-06 20:31:38,162 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 40 proven. 1 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-11-06 20:31:38,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:31:40,665 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-06 20:31:40,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:31:40,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973653545] [2023-11-06 20:31:40,666 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 20:31:40,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87890250] [2023-11-06 20:31:40,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87890250] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:31:40,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1501789333] [2023-11-06 20:31:40,670 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-11-06 20:31:40,670 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:31:40,670 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:31:40,671 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:31:40,671 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:31:44,960 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 65 for LOIs [2023-11-06 20:31:45,255 INFO L180 IcfgInterpreter]: Interpretation finished