./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2c_update_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2c_update_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e86102617f1813255879beda7bab492587801800e6506c4c5cd56fb9179f8713 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 18:33:13,303 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 18:33:13,365 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-12-02 18:33:13,371 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 18:33:13,371 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 18:33:13,396 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 18:33:13,397 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 18:33:13,398 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 18:33:13,398 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 18:33:13,399 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 18:33:13,399 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 18:33:13,400 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 18:33:13,400 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 18:33:13,401 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 18:33:13,401 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 18:33:13,402 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 18:33:13,402 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 18:33:13,403 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 18:33:13,403 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 18:33:13,404 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 18:33:13,405 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 18:33:13,406 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 18:33:13,407 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 18:33:13,407 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 18:33:13,408 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 18:33:13,408 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 18:33:13,409 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 18:33:13,409 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 18:33:13,409 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 18:33:13,410 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 18:33:13,410 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 18:33:13,410 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 18:33:13,411 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 18:33:13,411 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 18:33:13,411 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 18:33:13,412 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 18:33:13,412 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 18:33:13,412 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 18:33:13,412 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 18:33:13,412 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 18:33:13,413 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:33:13,413 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 18:33:13,413 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 18:33:13,413 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 18:33:13,413 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 18:33:13,414 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 18:33:13,414 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 18:33:13,414 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 18:33:13,414 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_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e86102617f1813255879beda7bab492587801800e6506c4c5cd56fb9179f8713 [2023-12-02 18:33:13,648 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 18:33:13,667 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 18:33:13,670 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 18:33:13,671 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 18:33:13,672 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 18:33:13,673 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/list-simple/sll2c_update_all.i [2023-12-02 18:33:16,452 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 18:33:16,670 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 18:33:16,671 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/sv-benchmarks/c/list-simple/sll2c_update_all.i [2023-12-02 18:33:16,685 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/data/d08a32f3f/441216cb6b984fc9bb51dac97f88779c/FLAG5e1783343 [2023-12-02 18:33:16,699 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/data/d08a32f3f/441216cb6b984fc9bb51dac97f88779c [2023-12-02 18:33:16,702 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 18:33:16,703 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 18:33:16,705 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 18:33:16,705 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 18:33:16,711 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 18:33:16,711 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:33:16" (1/1) ... [2023-12-02 18:33:16,712 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63f2fbdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:33:16, skipping insertion in model container [2023-12-02 18:33:16,713 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:33:16" (1/1) ... [2023-12-02 18:33:16,759 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 18:33:17,046 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:33:17,056 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 18:33:17,096 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:33:17,128 INFO L206 MainTranslator]: Completed translation [2023-12-02 18:33:17,128 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:33:17 WrapperNode [2023-12-02 18:33:17,128 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 18:33:17,130 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 18:33:17,130 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 18:33:17,130 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 18:33:17,137 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:33:17" (1/1) ... [2023-12-02 18:33:17,152 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:33:17" (1/1) ... [2023-12-02 18:33:17,179 INFO L138 Inliner]: procedures = 126, calls = 27, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 140 [2023-12-02 18:33:17,179 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 18:33:17,180 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 18:33:17,180 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 18:33:17,181 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 18:33:17,190 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:33:17" (1/1) ... [2023-12-02 18:33:17,191 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:33:17" (1/1) ... [2023-12-02 18:33:17,195 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:33:17" (1/1) ... [2023-12-02 18:33:17,195 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:33:17" (1/1) ... [2023-12-02 18:33:17,204 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:33:17" (1/1) ... [2023-12-02 18:33:17,208 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:33:17" (1/1) ... [2023-12-02 18:33:17,211 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:33:17" (1/1) ... [2023-12-02 18:33:17,213 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:33:17" (1/1) ... [2023-12-02 18:33:17,216 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 18:33:17,217 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 18:33:17,217 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 18:33:17,218 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 18:33:17,218 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:33:17" (1/1) ... [2023-12-02 18:33:17,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:33:17,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:33:17,246 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 18:33:17,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 18:33:17,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 18:33:17,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 18:33:17,277 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-12-02 18:33:17,277 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-12-02 18:33:17,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 18:33:17,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 18:33:17,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 18:33:17,278 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 18:33:17,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 18:33:17,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 18:33:17,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 18:33:17,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 18:33:17,380 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 18:33:17,382 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 18:33:17,632 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 18:33:17,686 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 18:33:17,686 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-12-02 18:33:17,688 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:33:17 BoogieIcfgContainer [2023-12-02 18:33:17,688 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 18:33:17,690 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 18:33:17,690 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 18:33:17,692 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 18:33:17,693 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 06:33:16" (1/3) ... [2023-12-02 18:33:17,693 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@468f8cd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:33:17, skipping insertion in model container [2023-12-02 18:33:17,694 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:33:17" (2/3) ... [2023-12-02 18:33:17,694 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@468f8cd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:33:17, skipping insertion in model container [2023-12-02 18:33:17,694 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:33:17" (3/3) ... [2023-12-02 18:33:17,695 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2c_update_all.i [2023-12-02 18:33:17,715 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 18:33:17,715 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2023-12-02 18:33:17,757 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 18:33:17,763 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;@7faa7300, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 18:33:17,763 INFO L358 AbstractCegarLoop]: Starting to check reachability of 28 error locations. [2023-12-02 18:33:17,784 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 35 states have (on average 2.085714285714286) internal successors, (73), 63 states have internal predecessors, (73), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:33:17,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 18:33:17,789 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:33:17,790 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 18:33:17,790 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:33:17,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:33:17,795 INFO L85 PathProgramCache]: Analyzing trace with hash 209499439, now seen corresponding path program 1 times [2023-12-02 18:33:17,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:33:17,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346019857] [2023-12-02 18:33:17,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:33:17,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:33:17,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:33:18,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:33:18,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:33:18,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346019857] [2023-12-02 18:33:18,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346019857] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:33:18,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:33:18,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 18:33:18,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260601496] [2023-12-02 18:33:18,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:33:18,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:33:18,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:33:18,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:33:18,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:33:18,066 INFO L87 Difference]: Start difference. First operand has 67 states, 35 states have (on average 2.085714285714286) internal successors, (73), 63 states have internal predecessors, (73), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) 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) [2023-12-02 18:33:18,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:33:18,167 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2023-12-02 18:33:18,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:33:18,170 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 [2023-12-02 18:33:18,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:33:18,176 INFO L225 Difference]: With dead ends: 64 [2023-12-02 18:33:18,176 INFO L226 Difference]: Without dead ends: 62 [2023-12-02 18:33:18,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:33:18,181 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:33:18,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 79 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:33:18,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-12-02 18:33:18,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-12-02 18:33:18,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 58 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:33:18,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2023-12-02 18:33:18,215 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 5 [2023-12-02 18:33:18,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:33:18,216 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2023-12-02 18:33:18,216 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) [2023-12-02 18:33:18,216 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2023-12-02 18:33:18,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 18:33:18,217 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:33:18,217 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 18:33:18,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 18:33:18,218 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:33:18,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:33:18,218 INFO L85 PathProgramCache]: Analyzing trace with hash 209499440, now seen corresponding path program 1 times [2023-12-02 18:33:18,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:33:18,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185823237] [2023-12-02 18:33:18,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:33:18,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:33:18,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:33:18,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:33:18,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:33:18,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185823237] [2023-12-02 18:33:18,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185823237] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:33:18,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:33:18,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 18:33:18,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476580755] [2023-12-02 18:33:18,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:33:18,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:33:18,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:33:18,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:33:18,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:33:18,337 INFO L87 Difference]: Start difference. First operand 62 states and 69 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) [2023-12-02 18:33:18,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:33:18,405 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2023-12-02 18:33:18,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:33:18,406 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 [2023-12-02 18:33:18,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:33:18,407 INFO L225 Difference]: With dead ends: 60 [2023-12-02 18:33:18,407 INFO L226 Difference]: Without dead ends: 60 [2023-12-02 18:33:18,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:33:18,409 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 2 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:33:18,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 83 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:33:18,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-12-02 18:33:18,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-12-02 18:33:18,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 56 states have internal predecessors, (63), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:33:18,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2023-12-02 18:33:18,419 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 5 [2023-12-02 18:33:18,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:33:18,419 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2023-12-02 18:33:18,419 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) [2023-12-02 18:33:18,419 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2023-12-02 18:33:18,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 18:33:18,420 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:33:18,420 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:33:18,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 18:33:18,421 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:33:18,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:33:18,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1748634853, now seen corresponding path program 1 times [2023-12-02 18:33:18,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:33:18,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521005079] [2023-12-02 18:33:18,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:33:18,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:33:18,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:33:18,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:33:18,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:33:18,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521005079] [2023-12-02 18:33:18,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521005079] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:33:18,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:33:18,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:33:18,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67717568] [2023-12-02 18:33:18,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:33:18,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:33:18,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:33:18,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:33:18,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:33:18,508 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 18:33:18,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:33:18,548 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2023-12-02 18:33:18,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:33:18,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-12-02 18:33:18,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:33:18,550 INFO L225 Difference]: With dead ends: 66 [2023-12-02 18:33:18,550 INFO L226 Difference]: Without dead ends: 66 [2023-12-02 18:33:18,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:33:18,552 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 4 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:33:18,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 94 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:33:18,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-12-02 18:33:18,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2023-12-02 18:33:18,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 57 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:33:18,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2023-12-02 18:33:18,561 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 10 [2023-12-02 18:33:18,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:33:18,561 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2023-12-02 18:33:18,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 18:33:18,562 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2023-12-02 18:33:18,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 18:33:18,562 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:33:18,562 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:33:18,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 18:33:18,563 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:33:18,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:33:18,563 INFO L85 PathProgramCache]: Analyzing trace with hash 420391556, now seen corresponding path program 1 times [2023-12-02 18:33:18,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:33:18,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164376445] [2023-12-02 18:33:18,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:33:18,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:33:18,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:33:18,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 18:33:18,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:33:18,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164376445] [2023-12-02 18:33:18,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164376445] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:33:18,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:33:18,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 18:33:18,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318008073] [2023-12-02 18:33:18,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:33:18,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 18:33:18,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:33:18,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 18:33:18,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:33:18,712 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand has 6 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:33:18,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:33:18,873 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2023-12-02 18:33:18,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 18:33:18,874 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-12-02 18:33:18,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:33:18,875 INFO L225 Difference]: With dead ends: 60 [2023-12-02 18:33:18,875 INFO L226 Difference]: Without dead ends: 60 [2023-12-02 18:33:18,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:33:18,876 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 3 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:33:18,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 160 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:33:18,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-12-02 18:33:18,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-12-02 18:33:18,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 56 states have internal predecessors, (63), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:33:18,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2023-12-02 18:33:18,883 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 17 [2023-12-02 18:33:18,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:33:18,883 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2023-12-02 18:33:18,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:33:18,883 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2023-12-02 18:33:18,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 18:33:18,884 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:33:18,884 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:33:18,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 18:33:18,885 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:33:18,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:33:18,885 INFO L85 PathProgramCache]: Analyzing trace with hash 420391557, now seen corresponding path program 1 times [2023-12-02 18:33:18,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:33:18,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315555593] [2023-12-02 18:33:18,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:33:18,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:33:18,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:33:19,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 18:33:19,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:33:19,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315555593] [2023-12-02 18:33:19,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315555593] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:33:19,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:33:19,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 18:33:19,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940117634] [2023-12-02 18:33:19,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:33:19,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 18:33:19,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:33:19,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 18:33:19,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:33:19,129 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:33:19,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:33:19,251 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2023-12-02 18:33:19,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 18:33:19,251 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-12-02 18:33:19,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:33:19,252 INFO L225 Difference]: With dead ends: 59 [2023-12-02 18:33:19,252 INFO L226 Difference]: Without dead ends: 59 [2023-12-02 18:33:19,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:33:19,254 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 1 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:33:19,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 180 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:33:19,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-12-02 18:33:19,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-12-02 18:33:19,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 55 states have internal predecessors, (62), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:33:19,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2023-12-02 18:33:19,260 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 17 [2023-12-02 18:33:19,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:33:19,260 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2023-12-02 18:33:19,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:33:19,261 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2023-12-02 18:33:19,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 18:33:19,261 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:33:19,261 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:33:19,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 18:33:19,262 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:33:19,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:33:19,262 INFO L85 PathProgramCache]: Analyzing trace with hash 269535751, now seen corresponding path program 1 times [2023-12-02 18:33:19,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:33:19,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088806719] [2023-12-02 18:33:19,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:33:19,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:33:19,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:33:19,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 18:33:19,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:33:19,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088806719] [2023-12-02 18:33:19,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088806719] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:33:19,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137485929] [2023-12-02 18:33:19,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:33:19,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:33:19,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:33:19,478 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:33:19,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 18:33:19,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:33:19,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-02 18:33:19,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:33:19,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:33:19,712 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 18:33:19,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-12-02 18:33:19,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 18:33:19,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:33:20,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 18:33:20,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137485929] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:33:20,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [864980023] [2023-12-02 18:33:20,084 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-12-02 18:33:20,084 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:33:20,089 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:33:20,094 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:33:20,094 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:33:21,072 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 43 for LOIs [2023-12-02 18:33:21,139 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:33:23,015 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '832#(and (not (= (select |#valid| |ULTIMATE.start_sll_circular_create_~last~0#1.base|) 1)) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_main_~len~0#1| 2) (= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (= |ULTIMATE.start_sll_circular_create_~data#1| 1))' at error location [2023-12-02 18:33:23,015 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:33:23,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:33:23,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 17 [2023-12-02 18:33:23,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281260996] [2023-12-02 18:33:23,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:33:23,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 18:33:23,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:33:23,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 18:33:23,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2023-12-02 18:33:23,018 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 18 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 18:33:23,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:33:23,288 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2023-12-02 18:33:23,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 18:33:23,289 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 19 [2023-12-02 18:33:23,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:33:23,290 INFO L225 Difference]: With dead ends: 58 [2023-12-02 18:33:23,290 INFO L226 Difference]: Without dead ends: 58 [2023-12-02 18:33:23,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2023-12-02 18:33:23,292 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:33:23,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 274 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:33:23,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-12-02 18:33:23,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-12-02 18:33:23,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 54 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:33:23,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2023-12-02 18:33:23,297 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 19 [2023-12-02 18:33:23,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:33:23,298 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2023-12-02 18:33:23,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 18:33:23,298 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2023-12-02 18:33:23,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 18:33:23,298 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:33:23,299 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:33:23,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 18:33:23,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:33:23,500 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:33:23,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:33:23,501 INFO L85 PathProgramCache]: Analyzing trace with hash 269535752, now seen corresponding path program 1 times [2023-12-02 18:33:23,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:33:23,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825950964] [2023-12-02 18:33:23,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:33:23,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:33:23,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:33:23,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:33:23,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:33:23,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825950964] [2023-12-02 18:33:23,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825950964] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:33:23,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944501740] [2023-12-02 18:33:23,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:33:23,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:33:23,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:33:23,953 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:33:23,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 18:33:24,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:33:24,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 18:33:24,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:33:24,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:33:24,179 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-12-02 18:33:24,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 18:33:24,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 18:33:24,217 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 18:33:24,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 18:33:24,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-12-02 18:33:24,248 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:33:24,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944501740] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:33:24,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [692386346] [2023-12-02 18:33:24,373 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-12-02 18:33:24,373 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:33:24,373 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:33:24,374 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:33:24,374 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:33:25,043 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 43 for LOIs [2023-12-02 18:33:25,092 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:33:27,258 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1050#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (<= (select |#length| |ULTIMATE.start_sll_circular_create_~last~0#1.base|) 3) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_main_~len~0#1| 2) (= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (= |ULTIMATE.start_sll_circular_create_~data#1| 1))' at error location [2023-12-02 18:33:27,258 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:33:27,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 18:33:27,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2023-12-02 18:33:27,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925144866] [2023-12-02 18:33:27,259 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 18:33:27,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 18:33:27,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:33:27,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 18:33:27,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=768, Unknown=1, NotChecked=56, Total=930 [2023-12-02 18:33:27,261 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 17 states, 13 states have (on average 2.230769230769231) internal successors, (29), 14 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 18:33:27,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:33:27,544 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2023-12-02 18:33:27,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 18:33:27,545 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.230769230769231) internal successors, (29), 14 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 19 [2023-12-02 18:33:27,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:33:27,546 INFO L225 Difference]: With dead ends: 58 [2023-12-02 18:33:27,546 INFO L226 Difference]: Without dead ends: 58 [2023-12-02 18:33:27,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=126, Invalid=869, Unknown=1, NotChecked=60, Total=1056 [2023-12-02 18:33:27,547 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 5 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:33:27,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 246 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 305 Invalid, 0 Unknown, 62 Unchecked, 0.2s Time] [2023-12-02 18:33:27,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-12-02 18:33:27,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2023-12-02 18:33:27,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 53 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:33:27,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2023-12-02 18:33:27,551 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 19 [2023-12-02 18:33:27,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:33:27,552 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2023-12-02 18:33:27,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.230769230769231) internal successors, (29), 14 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 18:33:27,552 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2023-12-02 18:33:27,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 18:33:27,553 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:33:27,553 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:33:27,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-02 18:33:27,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:33:27,754 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:33:27,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:33:27,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1844388665, now seen corresponding path program 1 times [2023-12-02 18:33:27,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:33:27,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335599975] [2023-12-02 18:33:27,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:33:27,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:33:27,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:33:27,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 18:33:27,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:33:27,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335599975] [2023-12-02 18:33:27,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335599975] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:33:27,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:33:27,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 18:33:27,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947531829] [2023-12-02 18:33:27,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:33:27,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 18:33:27,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:33:27,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 18:33:27,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:33:27,904 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:33:28,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:33:28,081 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2023-12-02 18:33:28,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 18:33:28,082 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2023-12-02 18:33:28,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:33:28,083 INFO L225 Difference]: With dead ends: 82 [2023-12-02 18:33:28,083 INFO L226 Difference]: Without dead ends: 82 [2023-12-02 18:33:28,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-12-02 18:33:28,084 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 58 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:33:28,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 194 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:33:28,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-12-02 18:33:28,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 60. [2023-12-02 18:33:28,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 56 states have internal predecessors, (66), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:33:28,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2023-12-02 18:33:28,088 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 22 [2023-12-02 18:33:28,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:33:28,089 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2023-12-02 18:33:28,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:33:28,089 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2023-12-02 18:33:28,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 18:33:28,090 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:33:28,090 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:33:28,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 18:33:28,090 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:33:28,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:33:28,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1844388664, now seen corresponding path program 1 times [2023-12-02 18:33:28,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:33:28,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584120981] [2023-12-02 18:33:28,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:33:28,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:33:28,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:33:28,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 18:33:28,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:33:28,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584120981] [2023-12-02 18:33:28,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584120981] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:33:28,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:33:28,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 18:33:28,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16771687] [2023-12-02 18:33:28,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:33:28,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 18:33:28,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:33:28,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 18:33:28,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:33:28,381 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:33:28,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:33:28,559 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2023-12-02 18:33:28,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 18:33:28,559 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2023-12-02 18:33:28,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:33:28,560 INFO L225 Difference]: With dead ends: 61 [2023-12-02 18:33:28,560 INFO L226 Difference]: Without dead ends: 61 [2023-12-02 18:33:28,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-12-02 18:33:28,561 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 55 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:33:28,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 230 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:33:28,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-12-02 18:33:28,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2023-12-02 18:33:28,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 56 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:33:28,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2023-12-02 18:33:28,566 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 22 [2023-12-02 18:33:28,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:33:28,567 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2023-12-02 18:33:28,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:33:28,567 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2023-12-02 18:33:28,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 18:33:28,568 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:33:28,568 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:33:28,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 18:33:28,568 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:33:28,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:33:28,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1336622712, now seen corresponding path program 1 times [2023-12-02 18:33:28,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:33:28,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234578422] [2023-12-02 18:33:28,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:33:28,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:33:28,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:33:28,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:33:28,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:33:28,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234578422] [2023-12-02 18:33:28,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234578422] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:33:28,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:33:28,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:33:28,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203408089] [2023-12-02 18:33:28,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:33:28,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:33:28,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:33:28,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:33:28,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:33:28,661 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:33:28,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:33:28,712 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2023-12-02 18:33:28,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:33:28,712 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2023-12-02 18:33:28,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:33:28,714 INFO L225 Difference]: With dead ends: 83 [2023-12-02 18:33:28,714 INFO L226 Difference]: Without dead ends: 83 [2023-12-02 18:33:28,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:33:28,715 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 69 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:33:28,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 89 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:33:28,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-02 18:33:28,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 62. [2023-12-02 18:33:28,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 39 states have (on average 1.6923076923076923) internal successors, (66), 58 states have internal predecessors, (66), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:33:28,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2023-12-02 18:33:28,720 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 23 [2023-12-02 18:33:28,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:33:28,721 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2023-12-02 18:33:28,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:33:28,721 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2023-12-02 18:33:28,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 18:33:28,722 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:33:28,722 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:33:28,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 18:33:28,722 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:33:28,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:33:28,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1359470002, now seen corresponding path program 1 times [2023-12-02 18:33:28,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:33:28,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998042462] [2023-12-02 18:33:28,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:33:28,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:33:28,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:33:28,796 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:33:28,796 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:33:28,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998042462] [2023-12-02 18:33:28,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998042462] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:33:28,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:33:28,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:33:28,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742615517] [2023-12-02 18:33:28,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:33:28,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:33:28,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:33:28,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:33:28,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:33:28,798 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:33:28,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:33:28,855 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2023-12-02 18:33:28,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:33:28,855 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2023-12-02 18:33:28,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:33:28,856 INFO L225 Difference]: With dead ends: 75 [2023-12-02 18:33:28,856 INFO L226 Difference]: Without dead ends: 75 [2023-12-02 18:33:28,857 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 [2023-12-02 18:33:28,857 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 15 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:33:28,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 128 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:33:28,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-12-02 18:33:28,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 63. [2023-12-02 18:33:28,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 40 states have (on average 1.675) internal successors, (67), 59 states have internal predecessors, (67), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:33:28,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2023-12-02 18:33:28,862 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 24 [2023-12-02 18:33:28,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:33:28,862 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2023-12-02 18:33:28,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:33:28,862 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2023-12-02 18:33:28,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 18:33:28,863 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:33:28,863 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:33:28,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 18:33:28,863 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:33:28,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:33:28,864 INFO L85 PathProgramCache]: Analyzing trace with hash 956490284, now seen corresponding path program 1 times [2023-12-02 18:33:28,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:33:28,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166411820] [2023-12-02 18:33:28,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:33:28,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:33:28,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:33:28,936 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 18:33:28,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:33:28,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166411820] [2023-12-02 18:33:28,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166411820] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:33:28,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:33:28,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:33:28,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047232747] [2023-12-02 18:33:28,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:33:28,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:33:28,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:33:28,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:33:28,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:33:28,938 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:33:28,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:33:28,991 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2023-12-02 18:33:28,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:33:28,992 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2023-12-02 18:33:28,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:33:28,993 INFO L225 Difference]: With dead ends: 72 [2023-12-02 18:33:28,993 INFO L226 Difference]: Without dead ends: 72 [2023-12-02 18:33:28,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:33:28,994 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 13 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:33:28,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 128 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:33:28,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-12-02 18:33:28,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2023-12-02 18:33:28,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 60 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:33:28,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2023-12-02 18:33:28,998 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 26 [2023-12-02 18:33:28,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:33:28,998 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2023-12-02 18:33:28,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:33:28,999 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2023-12-02 18:33:28,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 18:33:29,000 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:33:29,000 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:33:29,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-02 18:33:29,000 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:33:29,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:33:29,000 INFO L85 PathProgramCache]: Analyzing trace with hash 956494135, now seen corresponding path program 1 times [2023-12-02 18:33:29,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:33:29,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066680647] [2023-12-02 18:33:29,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:33:29,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:33:29,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:33:29,143 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:33:29,144 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:33:29,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066680647] [2023-12-02 18:33:29,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066680647] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:33:29,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:33:29,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 18:33:29,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692690447] [2023-12-02 18:33:29,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:33:29,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 18:33:29,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:33:29,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 18:33:29,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:33:29,146 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:33:29,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:33:29,317 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2023-12-02 18:33:29,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 18:33:29,318 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2023-12-02 18:33:29,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:33:29,318 INFO L225 Difference]: With dead ends: 89 [2023-12-02 18:33:29,318 INFO L226 Difference]: Without dead ends: 89 [2023-12-02 18:33:29,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-12-02 18:33:29,319 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 54 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:33:29,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 194 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:33:29,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-12-02 18:33:29,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 67. [2023-12-02 18:33:29,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 63 states have internal predecessors, (74), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:33:29,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2023-12-02 18:33:29,324 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 26 [2023-12-02 18:33:29,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:33:29,324 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2023-12-02 18:33:29,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:33:29,324 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2023-12-02 18:33:29,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 18:33:29,325 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:33:29,325 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:33:29,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-02 18:33:29,326 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:33:29,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:33:29,326 INFO L85 PathProgramCache]: Analyzing trace with hash 956494136, now seen corresponding path program 1 times [2023-12-02 18:33:29,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:33:29,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156133568] [2023-12-02 18:33:29,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:33:29,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:33:29,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:33:29,578 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:33:29,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:33:29,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156133568] [2023-12-02 18:33:29,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156133568] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:33:29,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:33:29,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 18:33:29,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126849137] [2023-12-02 18:33:29,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:33:29,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 18:33:29,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:33:29,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 18:33:29,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:33:29,581 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:33:29,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:33:29,760 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2023-12-02 18:33:29,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 18:33:29,761 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2023-12-02 18:33:29,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:33:29,762 INFO L225 Difference]: With dead ends: 68 [2023-12-02 18:33:29,762 INFO L226 Difference]: Without dead ends: 68 [2023-12-02 18:33:29,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-12-02 18:33:29,763 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 51 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:33:29,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 230 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:33:29,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-12-02 18:33:29,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2023-12-02 18:33:29,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 44 states have (on average 1.6363636363636365) internal successors, (72), 63 states have internal predecessors, (72), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:33:29,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2023-12-02 18:33:29,767 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 26 [2023-12-02 18:33:29,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:33:29,768 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2023-12-02 18:33:29,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:33:29,768 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2023-12-02 18:33:29,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 18:33:29,769 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:33:29,769 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:33:29,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-02 18:33:29,769 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:33:29,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:33:29,770 INFO L85 PathProgramCache]: Analyzing trace with hash -568471154, now seen corresponding path program 1 times [2023-12-02 18:33:29,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:33:29,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614412155] [2023-12-02 18:33:29,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:33:29,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:33:29,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:33:30,370 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:33:30,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:33:30,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614412155] [2023-12-02 18:33:30,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614412155] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:33:30,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908148145] [2023-12-02 18:33:30,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:33:30,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:33:30,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:33:30,372 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:33:30,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 18:33:30,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:33:30,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 59 conjunts are in the unsatisfiable core [2023-12-02 18:33:30,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:33:30,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:33:30,578 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 18:33:30,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 18:33:30,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:33:30,667 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:33:30,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2023-12-02 18:33:30,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 18:33:30,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2023-12-02 18:33:30,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-12-02 18:33:30,795 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 18:33:30,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:33:30,810 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_616 (Array Int Int))) (or (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_616) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) 1) (not (= (let ((.cse0 (+ |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset| 4))) (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|) .cse0 (select v_ArrVal_616 .cse0))) v_ArrVal_616)))) is different from false [2023-12-02 18:33:30,873 INFO L349 Elim1Store]: treesize reduction 5, result has 66.7 percent of original size [2023-12-02 18:33:30,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2023-12-02 18:33:30,922 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:33:30,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2023-12-02 18:33:30,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2023-12-02 18:33:30,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-12-02 18:33:30,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908148145] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:33:30,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2136016540] [2023-12-02 18:33:30,992 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-12-02 18:33:30,992 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:33:30,992 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:33:30,992 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:33:30,993 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:33:31,788 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 43 for LOIs [2023-12-02 18:33:31,864 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:33:34,128 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2367#(and (not (= (select |#valid| |ULTIMATE.start_sll_circular_update_at_~head#1.base|) 1)) (<= |ULTIMATE.start_sll_circular_update_at_~index#1| 0))' at error location [2023-12-02 18:33:34,129 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:33:34,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 18:33:34,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2023-12-02 18:33:34,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305712045] [2023-12-02 18:33:34,129 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 18:33:34,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-02 18:33:34,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:33:34,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-02 18:33:34,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1518, Unknown=9, NotChecked=78, Total=1722 [2023-12-02 18:33:34,131 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand has 25 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 18:33:34,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:33:34,685 INFO L93 Difference]: Finished difference Result 131 states and 151 transitions. [2023-12-02 18:33:34,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 18:33:34,685 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-12-02 18:33:34,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:33:34,686 INFO L225 Difference]: With dead ends: 131 [2023-12-02 18:33:34,687 INFO L226 Difference]: Without dead ends: 131 [2023-12-02 18:33:34,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=157, Invalid=1908, Unknown=9, NotChecked=88, Total=2162 [2023-12-02 18:33:34,688 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 113 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:33:34,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 496 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 18:33:34,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-12-02 18:33:34,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 81. [2023-12-02 18:33:34,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 57 states have (on average 1.5964912280701755) internal successors, (91), 76 states have internal predecessors, (91), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 18:33:34,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 97 transitions. [2023-12-02 18:33:34,693 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 97 transitions. Word has length 27 [2023-12-02 18:33:34,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:33:34,693 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 97 transitions. [2023-12-02 18:33:34,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 18:33:34,693 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 97 transitions. [2023-12-02 18:33:34,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 18:33:34,694 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:33:34,694 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:33:34,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 18:33:34,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 18:33:34,898 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:33:34,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:33:34,898 INFO L85 PathProgramCache]: Analyzing trace with hash -568471153, now seen corresponding path program 1 times [2023-12-02 18:33:34,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:33:34,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993050843] [2023-12-02 18:33:34,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:33:34,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:33:34,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:33:35,653 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:33:35,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:33:35,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993050843] [2023-12-02 18:33:35,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993050843] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:33:35,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261322671] [2023-12-02 18:33:35,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:33:35,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:33:35,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:33:35,655 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:33:35,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 18:33:35,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:33:35,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 75 conjunts are in the unsatisfiable core [2023-12-02 18:33:35,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:33:35,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:33:36,009 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 18:33:36,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-12-02 18:33:36,030 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 18:33:36,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 18:33:36,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 18:33:36,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:33:36,178 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:33:36,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 51 [2023-12-02 18:33:36,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 24 [2023-12-02 18:33:36,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 18:33:36,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2023-12-02 18:33:36,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 18:33:36,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2023-12-02 18:33:36,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2023-12-02 18:33:36,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2023-12-02 18:33:36,399 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 18:33:36,399 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:33:36,547 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|)) (.cse1 (+ |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset| 4))) (and (forall ((v_ArrVal_716 (Array Int Int))) (or (not (= v_ArrVal_716 (store .cse0 .cse1 (select v_ArrVal_716 .cse1)))) (< 0 (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_716) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) 5)))) (forall ((v_ArrVal_716 (Array Int Int))) (or (not (= v_ArrVal_716 (store .cse0 .cse1 (select v_ArrVal_716 .cse1)))) (forall ((v_ArrVal_717 (Array Int Int))) (or (not (= v_ArrVal_717 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|) .cse1 (select v_ArrVal_717 .cse1)))) (< (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_716) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) 7) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_717) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))))))))) is different from false [2023-12-02 18:33:36,746 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_715 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_715) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) 4))) (forall ((v_ArrVal_715 (Array Int Int)) (v_ArrVal_714 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_715) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) 8) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_714) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))))) is different from false [2023-12-02 18:33:36,759 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:33:36,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2023-12-02 18:33:36,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2023-12-02 18:33:36,772 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:33:36,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2023-12-02 18:33:36,779 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:33:36,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-12-02 18:33:36,781 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 18:33:36,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2023-12-02 18:33:36,785 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 18:33:36,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-12-02 18:33:36,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261322671] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:33:36,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [888681515] [2023-12-02 18:33:36,984 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-12-02 18:33:36,984 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:33:36,984 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:33:36,984 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:33:36,984 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:33:37,673 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 43 for LOIs [2023-12-02 18:33:37,722 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:33:40,610 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2760#(and (= |ULTIMATE.start_sll_circular_update_at_#in~head#1.offset| 0) (= |ULTIMATE.start_sll_circular_create_#res#1.offset| 0) (or (< (+ 4 |ULTIMATE.start_sll_circular_update_at_~head#1.offset|) 0) (< (select |#length| |ULTIMATE.start_sll_circular_update_at_~head#1.base|) (+ 8 |ULTIMATE.start_sll_circular_update_at_~head#1.offset|))) (or (and (= |ULTIMATE.start_sll_circular_update_at_#in~data#1| 3) (= |ULTIMATE.start_sll_circular_update_at_~head#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_circular_update_at_#in~head#1.base|) 0)) (= |ULTIMATE.start_sll_circular_update_at_#in~head#1.base| |ULTIMATE.start_main_~s~0#1.base|) (<= 4 (select |#length| |ULTIMATE.start_sll_circular_update_at_#in~head#1.base|)) (= |ULTIMATE.start_main_~i~0#1| 1) (= 3 |ULTIMATE.start_sll_circular_update_at_~data#1|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_circular_update_at_#in~head#1.base|) 0) |ULTIMATE.start_sll_circular_update_at_~head#1.offset|) (= 3 |ULTIMATE.start_main_~new_data~0#1|) (= (select |#valid| |ULTIMATE.start_sll_circular_update_at_#in~head#1.base|) 1) (= |ULTIMATE.start_sll_circular_update_at_~index#1| 0) (= |ULTIMATE.start_sll_circular_update_at_#in~index#1| 1)) (and (= |ULTIMATE.start_sll_circular_update_at_~head#1.offset| 0) (= |ULTIMATE.start_sll_circular_update_at_#in~head#1.base| |ULTIMATE.start_main_~s~0#1.base|) (= |ULTIMATE.start_sll_circular_update_at_#in~head#1.base| |ULTIMATE.start_sll_circular_update_at_~head#1.base|) (= |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_sll_circular_update_at_#in~index#1|) (= |ULTIMATE.start_sll_circular_update_at_~index#1| |ULTIMATE.start_sll_circular_update_at_#in~index#1|) (= |ULTIMATE.start_sll_circular_update_at_#in~data#1| |ULTIMATE.start_sll_circular_update_at_~data#1|) (= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~new_data~0#1|) (= |ULTIMATE.start_sll_circular_update_at_#in~data#1| |ULTIMATE.start_main_~new_data~0#1|))) (<= |ULTIMATE.start_sll_circular_update_at_~index#1| 0) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_main_~s~0#1.offset| 0))' at error location [2023-12-02 18:33:40,611 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:33:40,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 18:33:40,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2023-12-02 18:33:40,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038938891] [2023-12-02 18:33:40,611 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 18:33:40,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-02 18:33:40,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:33:40,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-02 18:33:40,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=2588, Unknown=4, NotChecked=206, Total=2970 [2023-12-02 18:33:40,614 INFO L87 Difference]: Start difference. First operand 81 states and 97 transitions. Second operand has 31 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 18:33:41,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:33:41,561 INFO L93 Difference]: Finished difference Result 138 states and 161 transitions. [2023-12-02 18:33:41,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 18:33:41,562 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2023-12-02 18:33:41,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:33:41,563 INFO L225 Difference]: With dead ends: 138 [2023-12-02 18:33:41,563 INFO L226 Difference]: Without dead ends: 138 [2023-12-02 18:33:41,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=223, Invalid=3087, Unknown=4, NotChecked=226, Total=3540 [2023-12-02 18:33:41,565 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 115 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 1092 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 1100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 18:33:41,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 715 Invalid, 1100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1092 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 18:33:41,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-12-02 18:33:41,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 86. [2023-12-02 18:33:41,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 62 states have (on average 1.596774193548387) internal successors, (99), 81 states have internal predecessors, (99), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 18:33:41,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 105 transitions. [2023-12-02 18:33:41,570 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 105 transitions. Word has length 27 [2023-12-02 18:33:41,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:33:41,570 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 105 transitions. [2023-12-02 18:33:41,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 18:33:41,570 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 105 transitions. [2023-12-02 18:33:41,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 18:33:41,571 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:33:41,571 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:33:41,578 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 18:33:41,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 18:33:41,778 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:33:41,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:33:41,778 INFO L85 PathProgramCache]: Analyzing trace with hash -844448583, now seen corresponding path program 2 times [2023-12-02 18:33:41,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:33:41,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42995720] [2023-12-02 18:33:41,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:33:41,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:33:41,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:33:41,855 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:33:41,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:33:41,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42995720] [2023-12-02 18:33:41,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42995720] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:33:41,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419400723] [2023-12-02 18:33:41,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 18:33:41,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:33:41,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:33:41,857 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:33:41,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 18:33:42,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 18:33:42,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:33:42,069 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 18:33:42,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:33:42,096 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 18:33:42,096 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:33:42,127 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 18:33:42,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419400723] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:33:42,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [301416780] [2023-12-02 18:33:42,130 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-12-02 18:33:42,130 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:33:42,130 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:33:42,130 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:33:42,130 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:33:42,831 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 43 for LOIs [2023-12-02 18:33:42,880 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:33:44,325 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3185#(and (not (= (select |#valid| |ULTIMATE.start_sll_circular_update_at_~head#1.base|) 1)) (<= |ULTIMATE.start_sll_circular_update_at_~index#1| 0))' at error location [2023-12-02 18:33:44,325 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:33:44,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:33:44,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 7 [2023-12-02 18:33:44,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617286133] [2023-12-02 18:33:44,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:33:44,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 18:33:44,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:33:44,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 18:33:44,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2023-12-02 18:33:44,326 INFO L87 Difference]: Start difference. First operand 86 states and 105 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 18:33:44,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:33:44,447 INFO L93 Difference]: Finished difference Result 115 states and 134 transitions. [2023-12-02 18:33:44,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 18:33:44,447 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2023-12-02 18:33:44,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:33:44,448 INFO L225 Difference]: With dead ends: 115 [2023-12-02 18:33:44,448 INFO L226 Difference]: Without dead ends: 115 [2023-12-02 18:33:44,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=89, Invalid=510, Unknown=1, NotChecked=0, Total=600 [2023-12-02 18:33:44,450 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 135 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:33:44,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 182 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:33:44,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-12-02 18:33:44,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 82. [2023-12-02 18:33:44,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 60 states have (on average 1.5166666666666666) internal successors, (91), 77 states have internal predecessors, (91), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 18:33:44,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 97 transitions. [2023-12-02 18:33:44,452 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 97 transitions. Word has length 29 [2023-12-02 18:33:44,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:33:44,453 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 97 transitions. [2023-12-02 18:33:44,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 18:33:44,453 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 97 transitions. [2023-12-02 18:33:44,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 18:33:44,453 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:33:44,454 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:33:44,459 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 18:33:44,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 18:33:44,654 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:33:44,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:33:44,655 INFO L85 PathProgramCache]: Analyzing trace with hash 2106962116, now seen corresponding path program 1 times [2023-12-02 18:33:44,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:33:44,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334140125] [2023-12-02 18:33:44,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:33:44,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:33:44,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:33:44,749 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:33:44,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:33:44,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334140125] [2023-12-02 18:33:44,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334140125] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:33:44,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331359968] [2023-12-02 18:33:44,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:33:44,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:33:44,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:33:44,751 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:33:44,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 18:33:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:33:44,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:33:44,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:33:44,939 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:33:44,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:33:44,976 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:33:44,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331359968] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:33:44,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1707607993] [2023-12-02 18:33:44,978 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 18:33:44,978 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:33:44,979 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:33:44,979 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:33:44,979 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:33:45,729 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 43 for LOIs [2023-12-02 18:33:45,789 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:33:51,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1707607993] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:33:51,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:33:51,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [5, 5, 5] total 24 [2023-12-02 18:33:51,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132473737] [2023-12-02 18:33:51,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:33:51,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 18:33:51,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:33:51,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 18:33:51,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=447, Unknown=1, NotChecked=0, Total=552 [2023-12-02 18:33:51,497 INFO L87 Difference]: Start difference. First operand 82 states and 97 transitions. Second operand has 16 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:33:53,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:33:53,303 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2023-12-02 18:33:53,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 18:33:53,303 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2023-12-02 18:33:53,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:33:53,304 INFO L225 Difference]: With dead ends: 68 [2023-12-02 18:33:53,304 INFO L226 Difference]: Without dead ends: 68 [2023-12-02 18:33:53,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=104, Invalid=447, Unknown=1, NotChecked=0, Total=552 [2023-12-02 18:33:53,305 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 1 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-02 18:33:53,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 185 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 521 Invalid, 1 Unknown, 0 Unchecked, 1.8s Time] [2023-12-02 18:33:53,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-12-02 18:33:53,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-12-02 18:33:53,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 48 states have (on average 1.5) internal successors, (72), 64 states have internal predecessors, (72), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:33:53,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2023-12-02 18:33:53,308 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 29 [2023-12-02 18:33:53,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:33:53,309 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2023-12-02 18:33:53,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:33:53,309 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2023-12-02 18:33:53,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 18:33:53,309 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:33:53,310 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:33:53,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 18:33:53,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:33:53,510 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:33:53,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:33:53,511 INFO L85 PathProgramCache]: Analyzing trace with hash -341982937, now seen corresponding path program 3 times [2023-12-02 18:33:53,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:33:53,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163158632] [2023-12-02 18:33:53,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:33:53,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:33:53,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:33:53,608 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:33:53,608 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:33:53,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163158632] [2023-12-02 18:33:53,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163158632] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:33:53,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397247806] [2023-12-02 18:33:53,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 18:33:53,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:33:53,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:33:53,610 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:33:53,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 18:33:53,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 18:33:53,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:33:53,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 18:33:53,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:33:53,821 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 18:33:53,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:33:53,866 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 18:33:53,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397247806] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:33:53,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1917160390] [2023-12-02 18:33:53,868 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-12-02 18:33:53,868 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:33:53,868 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:33:53,869 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:33:53,869 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:33:54,621 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 43 for LOIs [2023-12-02 18:33:54,665 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:33:56,849 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3930#(and (= |ULTIMATE.start_sll_circular_update_at_#in~head#1.offset| 0) (= |ULTIMATE.start_sll_circular_create_#res#1.offset| 0) (or (and (= |ULTIMATE.start_sll_circular_update_at_#in~data#1| 3) (= |ULTIMATE.start_sll_circular_update_at_~head#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_circular_update_at_#in~head#1.base|) 0)) (= |ULTIMATE.start_sll_circular_update_at_#in~head#1.base| |ULTIMATE.start_main_~s~0#1.base|) (<= 4 (select |#length| |ULTIMATE.start_sll_circular_update_at_#in~head#1.base|)) (= |ULTIMATE.start_main_~i~0#1| 1) (= 3 |ULTIMATE.start_sll_circular_update_at_~data#1|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_circular_update_at_#in~head#1.base|) 0) |ULTIMATE.start_sll_circular_update_at_~head#1.offset|) (= 3 |ULTIMATE.start_main_~new_data~0#1|) (= (select |#valid| |ULTIMATE.start_sll_circular_update_at_#in~head#1.base|) 1) (= |ULTIMATE.start_sll_circular_update_at_~index#1| 0) (= |ULTIMATE.start_sll_circular_update_at_#in~index#1| 1)) (and (= |ULTIMATE.start_sll_circular_update_at_~head#1.offset| 0) (= |ULTIMATE.start_sll_circular_update_at_#in~head#1.base| |ULTIMATE.start_main_~s~0#1.base|) (= |ULTIMATE.start_sll_circular_update_at_#in~head#1.base| |ULTIMATE.start_sll_circular_update_at_~head#1.base|) (= |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_sll_circular_update_at_#in~index#1|) (= |ULTIMATE.start_sll_circular_update_at_~index#1| |ULTIMATE.start_sll_circular_update_at_#in~index#1|) (= |ULTIMATE.start_sll_circular_update_at_#in~data#1| |ULTIMATE.start_sll_circular_update_at_~data#1|) (= (+ 2 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~new_data~0#1|) (= |ULTIMATE.start_sll_circular_update_at_#in~data#1| |ULTIMATE.start_main_~new_data~0#1|))) (not (= (select |#valid| |ULTIMATE.start_sll_circular_update_at_~head#1.base|) 1)) (<= |ULTIMATE.start_sll_circular_update_at_~index#1| 0) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_main_~s~0#1.offset| 0))' at error location [2023-12-02 18:33:56,849 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:33:56,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:33:56,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 11 [2023-12-02 18:33:56,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187033591] [2023-12-02 18:33:56,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:33:56,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 18:33:56,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:33:56,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 18:33:56,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=605, Unknown=2, NotChecked=0, Total=702 [2023-12-02 18:33:56,851 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 18:33:56,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:33:56,944 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2023-12-02 18:33:56,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 18:33:56,945 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-12-02 18:33:56,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:33:56,946 INFO L225 Difference]: With dead ends: 69 [2023-12-02 18:33:56,946 INFO L226 Difference]: Without dead ends: 69 [2023-12-02 18:33:56,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 70 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=103, Invalid=651, Unknown=2, NotChecked=0, Total=756 [2023-12-02 18:33:56,946 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 110 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:33:56,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 184 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:33:56,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-12-02 18:33:56,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2023-12-02 18:33:56,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 47 states have (on average 1.446808510638298) internal successors, (68), 62 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:33:56,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2023-12-02 18:33:56,949 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 32 [2023-12-02 18:33:56,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:33:56,950 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2023-12-02 18:33:56,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 18:33:56,950 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2023-12-02 18:33:56,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-02 18:33:56,950 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:33:56,950 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:33:56,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-02 18:33:57,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:33:57,151 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:33:57,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:33:57,151 INFO L85 PathProgramCache]: Analyzing trace with hash 718806557, now seen corresponding path program 1 times [2023-12-02 18:33:57,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:33:57,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464999606] [2023-12-02 18:33:57,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:33:57,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:33:57,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:33:58,232 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:33:58,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:33:58,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464999606] [2023-12-02 18:33:58,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464999606] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:33:58,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051434546] [2023-12-02 18:33:58,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:33:58,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:33:58,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:33:58,233 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:33:58,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 18:33:58,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:33:58,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 88 conjunts are in the unsatisfiable core [2023-12-02 18:33:58,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:33:58,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:33:58,571 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 18:33:58,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 18:33:58,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:33:58,702 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:33:58,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2023-12-02 18:33:58,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2023-12-02 18:33:58,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-02 18:33:58,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-12-02 18:33:58,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-12-02 18:33:59,097 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:33:59,097 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:33:59,169 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1119 (Array Int Int))) (= |c_ULTIMATE.start_main_~len~0#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_1119) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) is different from false [2023-12-02 18:33:59,177 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1119 (Array Int Int))) (= |c_ULTIMATE.start_main_~len~0#1| (select (select (store |c_#memory_int| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|) |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset|) v_ArrVal_1119) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) is different from false [2023-12-02 18:33:59,241 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:33:59,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-12-02 18:33:59,248 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:33:59,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 49 [2023-12-02 18:33:59,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2023-12-02 18:33:59,473 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:33:59,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2023-12-02 18:33:59,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2023-12-02 18:33:59,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-12-02 18:33:59,773 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-12-02 18:33:59,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051434546] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:33:59,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1272575779] [2023-12-02 18:33:59,775 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-12-02 18:33:59,775 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:33:59,776 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:33:59,776 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:33:59,776 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:34:00,439 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 43 for LOIs [2023-12-02 18:34:00,483 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:34:03,484 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4336#(and (= |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~expected~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_sll_circular_get_data_at_#res#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~s~0#1.offset| 4)) (not (= |ULTIMATE.start_sll_circular_get_data_at_#res#1| |ULTIMATE.start_main_~expected~0#1|)) (<= 1 |ULTIMATE.start_main_~len~0#1|) (<= |ULTIMATE.start_sll_circular_get_data_at_#res#1| 2147483647) (= (select |#valid| |ULTIMATE.start_main_~s~0#1.base|) 1) (= |ULTIMATE.start_sll_circular_get_data_at_#res#1| (select (select |#memory_int| |ULTIMATE.start_main_~s~0#1.base|) (+ |ULTIMATE.start_main_~s~0#1.offset| 4))) (<= (+ |ULTIMATE.start_main_~s~0#1.offset| 8) (select |#length| |ULTIMATE.start_main_~s~0#1.base|)))' at error location [2023-12-02 18:34:03,485 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:34:03,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:34:03,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 21] total 55 [2023-12-02 18:34:03,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444753719] [2023-12-02 18:34:03,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:34:03,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-12-02 18:34:03,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:34:03,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-12-02 18:34:03,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=4560, Unknown=20, NotChecked=274, Total=5112 [2023-12-02 18:34:03,488 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand has 55 states, 50 states have (on average 1.58) internal successors, (79), 47 states have internal predecessors, (79), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 18:34:04,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:34:04,634 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2023-12-02 18:34:04,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 18:34:04,635 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 50 states have (on average 1.58) internal successors, (79), 47 states have internal predecessors, (79), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 34 [2023-12-02 18:34:04,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:34:04,635 INFO L225 Difference]: With dead ends: 66 [2023-12-02 18:34:04,635 INFO L226 Difference]: Without dead ends: 66 [2023-12-02 18:34:04,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1600 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=417, Invalid=6377, Unknown=20, NotChecked=326, Total=7140 [2023-12-02 18:34:04,638 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 157 mSDsluCounter, 906 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 939 SdHoareTripleChecker+Invalid, 1082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 18:34:04,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 939 Invalid, 1082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 948 Invalid, 0 Unknown, 124 Unchecked, 0.6s Time] [2023-12-02 18:34:04,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-12-02 18:34:04,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2023-12-02 18:34:04,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 47 states have (on average 1.425531914893617) internal successors, (67), 62 states have internal predecessors, (67), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:34:04,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2023-12-02 18:34:04,640 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 34 [2023-12-02 18:34:04,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:34:04,640 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2023-12-02 18:34:04,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 50 states have (on average 1.58) internal successors, (79), 47 states have internal predecessors, (79), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 18:34:04,641 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2023-12-02 18:34:04,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-02 18:34:04,641 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:34:04,641 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:34:04,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-02 18:34:04,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:34:04,842 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:34:04,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:34:04,842 INFO L85 PathProgramCache]: Analyzing trace with hash 808243373, now seen corresponding path program 1 times [2023-12-02 18:34:04,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:34:04,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723259529] [2023-12-02 18:34:04,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:04,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:34:04,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:04,990 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 18:34:04,990 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:34:04,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723259529] [2023-12-02 18:34:04,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723259529] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:34:04,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:34:04,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 18:34:04,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880819838] [2023-12-02 18:34:04,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:34:04,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 18:34:04,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:34:04,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 18:34:04,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:34:04,993 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand has 9 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:34:05,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:34:05,168 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2023-12-02 18:34:05,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 18:34:05,169 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2023-12-02 18:34:05,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:34:05,170 INFO L225 Difference]: With dead ends: 83 [2023-12-02 18:34:05,170 INFO L226 Difference]: Without dead ends: 83 [2023-12-02 18:34:05,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-12-02 18:34:05,170 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 49 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:34:05,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 143 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:34:05,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-02 18:34:05,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 69. [2023-12-02 18:34:05,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 65 states have internal predecessors, (73), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:34:05,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2023-12-02 18:34:05,174 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 35 [2023-12-02 18:34:05,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:34:05,174 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2023-12-02 18:34:05,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:34:05,174 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2023-12-02 18:34:05,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-02 18:34:05,174 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:34:05,175 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:34:05,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-12-02 18:34:05,175 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:34:05,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:34:05,175 INFO L85 PathProgramCache]: Analyzing trace with hash 808243374, now seen corresponding path program 1 times [2023-12-02 18:34:05,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:34:05,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427375423] [2023-12-02 18:34:05,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:05,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:34:05,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:05,270 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 18:34:05,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:34:05,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427375423] [2023-12-02 18:34:05,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427375423] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:34:05,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663670394] [2023-12-02 18:34:05,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:05,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:34:05,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:34:05,272 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:34:05,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 18:34:05,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:05,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:34:05,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:34:05,498 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 18:34:05,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:34:05,544 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 18:34:05,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663670394] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:34:05,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1358042326] [2023-12-02 18:34:05,546 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-12-02 18:34:05,547 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:34:05,547 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:34:05,547 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:34:05,547 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:34:06,300 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 43 for LOIs [2023-12-02 18:34:06,346 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:34:07,678 WARN L876 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_sll_circular_create_~data#1| 1) (<= 1 |c_#StackHeapBarrier|) (= |c_ULTIMATE.start_sll_circular_create_#t~ret4#1.offset| 0) (let ((.cse0 (exists ((|v_#valid_156| (Array Int Int))) (and (= (select |v_#valid_156| |c_ULTIMATE.start_sll_circular_create_#t~ret4#1.base|) 0) (= |c_#valid| (store |v_#valid_156| |c_ULTIMATE.start_sll_circular_create_#t~ret4#1.base| 1))))) (.cse1 (exists ((|v_#length_132| (Array Int Int))) (= (store |v_#length_132| |c_ULTIMATE.start_sll_circular_create_#t~ret4#1.base| 8) |c_#length|))) (.cse2 (exists ((|v_#memory_int_217| (Array Int (Array Int Int))) (|v_#memory_int_216| (Array Int (Array Int Int)))) (let ((.cse14 (select |v_#memory_int_217| |c_ULTIMATE.start_sll_circular_create_#t~ret4#1.base|))) (and (= (store |v_#memory_int_217| |c_ULTIMATE.start_sll_circular_create_#t~ret4#1.base| (store .cse14 4 1)) |c_#memory_int|) (= (store |v_#memory_int_216| |c_ULTIMATE.start_sll_circular_create_#t~ret4#1.base| (store (select |v_#memory_int_216| |c_ULTIMATE.start_sll_circular_create_#t~ret4#1.base|) 0 (select .cse14 0))) |v_#memory_int_217|))))) (.cse3 (<= 8 (select |c_#length| |c_ULTIMATE.start_sll_circular_create_#t~ret4#1.base|))) (.cse4 (= (select |c_ULTIMATE.start_main_old_#valid#1| 0) 0)) (.cse6 (= (select |c_ULTIMATE.start_main_old_#valid#1| 2) 1)) (.cse7 (exists ((|v_#memory_$Pointer$.base_229| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_229| |c_ULTIMATE.start_sll_circular_create_#t~ret4#1.base| (store (store (select |v_#memory_$Pointer$.base_229| |c_ULTIMATE.start_sll_circular_create_#t~ret4#1.base|) 0 0) 4 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_#t~ret4#1.base|) 4))) |c_#memory_$Pointer$.base|))) (.cse8 (<= (+ |c_ULTIMATE.start_sll_circular_create_#t~ret4#1.base| 1) |c_#StackHeapBarrier|)) (.cse9 (= (select |c_#valid| |c_ULTIMATE.start_sll_circular_create_#t~ret4#1.base|) 1)) (.cse10 (not (= |c_ULTIMATE.start_sll_circular_create_#t~ret4#1.base| 0))) (.cse11 (= (select |c_ULTIMATE.start_main_old_#valid#1| 1) 1)) (.cse12 (exists ((|v_#memory_$Pointer$.offset_223| (Array Int (Array Int Int)))) (= |c_#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_223| |c_ULTIMATE.start_sll_circular_create_#t~ret4#1.base| (store (store (select |v_#memory_$Pointer$.offset_223| |c_ULTIMATE.start_sll_circular_create_#t~ret4#1.base|) 0 0) 4 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_#t~ret4#1.base|) 4))))))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 (exists ((|v_#memory_int_BEFORE_CALL_148| (Array Int (Array Int Int)))) (let ((.cse5 (select |v_#memory_int_BEFORE_CALL_148| 1))) (and (= (select .cse5 1) 0) (= (select .cse5 0) 48)))) .cse6 .cse7 .cse8 .cse9 .cse10 .cse11 .cse12 (exists ((|v_#length_BEFORE_CALL_152| (Array Int Int))) (and (= (select |v_#length_BEFORE_CALL_152| 2) 19) (= (select |v_#length_BEFORE_CALL_152| 1) 2)))) (and .cse0 .cse1 .cse2 (exists ((|v_#memory_int_BEFORE_CALL_146| (Array Int (Array Int Int)))) (let ((.cse13 (select |v_#memory_int_BEFORE_CALL_146| 1))) (and (= (select .cse13 1) 0) (= (select .cse13 0) 48)))) .cse3 .cse4 .cse6 .cse7 .cse8 .cse9 .cse10 (exists ((|v_#length_BEFORE_CALL_150| (Array Int Int))) (and (= 19 (select |v_#length_BEFORE_CALL_150| 2)) (= (select |v_#length_BEFORE_CALL_150| 1) 2))) .cse11 .cse12))) (= |c_ULTIMATE.start_main_~data~0#1| 1) (= 2 |c_ULTIMATE.start_sll_circular_create_#in~len#1|) (= |c_ULTIMATE.start_sll_circular_create_#in~data#1| 1) (= |c_ULTIMATE.start_sll_circular_create_~len#1| 2) (= |c_ULTIMATE.start_main_~len~0#1| 2)) is different from true [2023-12-02 18:34:08,603 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4890#(and (= |ULTIMATE.start_sll_circular_destroy_~head#1.offset| |ULTIMATE.start_sll_circular_destroy_#in~head#1.offset|) (= |ULTIMATE.start_sll_circular_destroy_#in~head#1.base| |ULTIMATE.start_main_~s~0#1.base|) (exists ((|v_ULTIMATE.start_main_~expected~0#1_22| Int)) (and (or (= |ULTIMATE.start_main_~i~0#1| 0) (and (= |ULTIMATE.start_sll_circular_get_data_at_#res#1| |v_ULTIMATE.start_main_~expected~0#1_22|) (= (select |#valid| |ULTIMATE.start_main_~s~0#1.base|) 1) (= |ULTIMATE.start_main_~len~0#1| |v_ULTIMATE.start_main_~expected~0#1_22|) (= |ULTIMATE.start_sll_circular_get_data_at_#res#1| (select (select |#memory_int| |ULTIMATE.start_main_~s~0#1.base|) (+ |ULTIMATE.start_main_~s~0#1.offset| 4))) (<= (+ |ULTIMATE.start_main_~s~0#1.offset| 8) (select |#length| |ULTIMATE.start_main_~s~0#1.base|)))) (or (= |ULTIMATE.start_main_~i~0#1| 0) (and (<= 0 (+ |ULTIMATE.start_main_~s~0#1.offset| 4)) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 1 |v_ULTIMATE.start_main_~expected~0#1_22|))))) (or (not (= |ULTIMATE.start_sll_circular_destroy_~head#1.base| 0)) (not (= |ULTIMATE.start_sll_circular_destroy_~head#1.offset| 0))) (= |ULTIMATE.start_sll_circular_destroy_#in~head#1.offset| |ULTIMATE.start_main_~s~0#1.offset|) (or (< |ULTIMATE.start_sll_circular_destroy_~head#1.offset| 0) (< (select |#length| |ULTIMATE.start_sll_circular_destroy_~head#1.base|) (+ |ULTIMATE.start_sll_circular_destroy_~head#1.offset| 4))) (<= |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_sll_circular_destroy_#in~head#1.base| |ULTIMATE.start_sll_circular_destroy_~head#1.base|))' at error location [2023-12-02 18:34:08,603 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:34:08,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:34:08,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-12-02 18:34:08,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140989545] [2023-12-02 18:34:08,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:34:08,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 18:34:08,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:34:08,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 18:34:08,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=711, Unknown=1, NotChecked=54, Total=870 [2023-12-02 18:34:08,605 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 18:34:08,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:34:08,660 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2023-12-02 18:34:08,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:34:08,661 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2023-12-02 18:34:08,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:34:08,662 INFO L225 Difference]: With dead ends: 69 [2023-12-02 18:34:08,662 INFO L226 Difference]: Without dead ends: 69 [2023-12-02 18:34:08,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=104, Invalid=711, Unknown=1, NotChecked=54, Total=870 [2023-12-02 18:34:08,663 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 71 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:34:08,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 146 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:34:08,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-12-02 18:34:08,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-12-02 18:34:08,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 51 states have (on average 1.411764705882353) internal successors, (72), 65 states have internal predecessors, (72), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:34:08,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2023-12-02 18:34:08,666 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 35 [2023-12-02 18:34:08,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:34:08,667 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2023-12-02 18:34:08,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 18:34:08,667 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2023-12-02 18:34:08,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-02 18:34:08,667 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:34:08,667 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:34:08,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-02 18:34:08,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:34:08,868 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:34:08,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:34:08,868 INFO L85 PathProgramCache]: Analyzing trace with hash -787061130, now seen corresponding path program 1 times [2023-12-02 18:34:08,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:34:08,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647868778] [2023-12-02 18:34:08,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:08,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:34:08,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:08,958 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 18:34:08,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:34:08,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647868778] [2023-12-02 18:34:08,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647868778] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:34:08,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343161427] [2023-12-02 18:34:08,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:08,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:34:08,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:34:08,960 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:34:08,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 18:34:09,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:09,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 18:34:09,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:34:09,169 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 18:34:09,169 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:34:09,190 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 18:34:09,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343161427] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:34:09,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [471267912] [2023-12-02 18:34:09,192 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 18:34:09,192 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:34:09,192 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:34:09,193 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:34:09,193 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:34:10,506 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 43 for LOIs [2023-12-02 18:34:10,551 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:34:12,570 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5271#(and (<= 1 |ULTIMATE.start_main_~expected~0#1|) (<= 1 |ULTIMATE.start_sll_circular_get_data_at_~index#1|) (<= 1 |ULTIMATE.start_main_~len~0#1|) (<= 0 |ULTIMATE.start_sll_circular_get_data_at_#in~index#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (not (= (select |#valid| |ULTIMATE.start_sll_circular_get_data_at_~head#1.base|) 1)))' at error location [2023-12-02 18:34:12,570 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:34:12,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:34:12,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2023-12-02 18:34:12,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891475504] [2023-12-02 18:34:12,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:34:12,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 18:34:12,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:34:12,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 18:34:12,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2023-12-02 18:34:12,572 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:34:12,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:34:12,675 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2023-12-02 18:34:12,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 18:34:12,676 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2023-12-02 18:34:12,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:34:12,676 INFO L225 Difference]: With dead ends: 66 [2023-12-02 18:34:12,676 INFO L226 Difference]: Without dead ends: 66 [2023-12-02 18:34:12,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 88 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2023-12-02 18:34:12,677 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 23 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:34:12,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 138 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:34:12,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-12-02 18:34:12,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2023-12-02 18:34:12,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 50 states have (on average 1.36) internal successors, (68), 62 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:34:12,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2023-12-02 18:34:12,680 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 37 [2023-12-02 18:34:12,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:34:12,681 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2023-12-02 18:34:12,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:34:12,681 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2023-12-02 18:34:12,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-02 18:34:12,681 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:34:12,681 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:34:12,687 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 18:34:12,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-12-02 18:34:12,882 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:34:12,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:34:12,882 INFO L85 PathProgramCache]: Analyzing trace with hash -787057279, now seen corresponding path program 1 times [2023-12-02 18:34:12,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:34:12,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505088815] [2023-12-02 18:34:12,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:12,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:34:12,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:13,607 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 18:34:13,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:34:13,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505088815] [2023-12-02 18:34:13,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505088815] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:34:13,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010065048] [2023-12-02 18:34:13,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:13,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:34:13,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:34:13,608 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:34:13,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 18:34:13,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:13,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 70 conjunts are in the unsatisfiable core [2023-12-02 18:34:13,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:34:13,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:34:13,810 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 18:34:13,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 18:34:13,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:34:13,879 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:34:13,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2023-12-02 18:34:13,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 18:34:13,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2023-12-02 18:34:14,007 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:34:14,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2023-12-02 18:34:14,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-12-02 18:34:14,056 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:34:14,056 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:34:18,189 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1490 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|) |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset|) v_ArrVal_1490) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) 1)) is different from false [2023-12-02 18:34:18,199 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1490 (Array Int Int))) (= 1 (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) v_ArrVal_1490) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)))) is different from false [2023-12-02 18:34:18,209 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1489 (Array Int Int)) (v_ArrVal_1490 (Array Int Int))) (or (not (= v_ArrVal_1489 (let ((.cse0 (+ |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset| 4))) (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|) .cse0 (select v_ArrVal_1489 .cse0))))) (= (select |c_#valid| (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_1489))) (store .cse1 (select (select .cse1 |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) v_ArrVal_1490)) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) 1))) is different from false [2023-12-02 18:34:18,229 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1489 (Array Int Int)) (|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_123| Int) (v_ArrVal_1490 (Array Int Int))) (or (= (select |c_#valid| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| v_ArrVal_1489) (select v_ArrVal_1489 |c_ULTIMATE.start_main_~s~0#1.offset|) v_ArrVal_1490) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) 1) (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_123| |c_ULTIMATE.start_main_~s~0#1.offset|) (not (= v_ArrVal_1489 (let ((.cse0 (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_123| 4))) (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse0 (select v_ArrVal_1489 .cse0))))))) is different from false [2023-12-02 18:34:18,246 INFO L349 Elim1Store]: treesize reduction 5, result has 78.3 percent of original size [2023-12-02 18:34:18,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2023-12-02 18:34:18,258 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1489 (Array Int Int)) (v_ArrVal_1488 (Array Int Int)) (|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_123| Int) (v_ArrVal_1490 (Array Int Int))) (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1488))) (or (not (= (let ((.cse1 (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_123| 4))) (store (select .cse0 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) .cse1 (select v_ArrVal_1489 .cse1))) v_ArrVal_1489)) (= (select (select (store (store .cse0 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| v_ArrVal_1489) (select v_ArrVal_1489 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) v_ArrVal_1490) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_sll_circular_create_~last~0#1.base|) (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_123| |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)))) is different from false [2023-12-02 18:34:18,280 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:34:18,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 50 [2023-12-02 18:34:18,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2023-12-02 18:34:18,292 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 18:34:18,298 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:34:18,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 50 [2023-12-02 18:34:18,309 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:34:18,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2023-12-02 18:34:18,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2023-12-02 18:34:18,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-12-02 18:34:18,342 WARN L214 Elim1Store]: Array PQE input equivalent to true [2023-12-02 18:34:18,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2023-12-02 18:34:18,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010065048] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:34:18,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1403988050] [2023-12-02 18:34:18,447 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 18:34:18,447 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:34:18,447 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:34:18,447 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:34:18,447 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:34:19,755 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 43 for LOIs [2023-12-02 18:34:19,807 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:34:22,102 WARN L876 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_sll_circular_create_~data#1| 1) (<= 1 |c_#StackHeapBarrier|) (= |c_ULTIMATE.start_sll_circular_create_#t~ret4#1.offset| 0) (let ((.cse0 (exists ((|v_#memory_int_253| (Array Int (Array Int Int))) (|v_#memory_int_254| (Array Int (Array Int Int)))) (let ((.cse14 (select |v_#memory_int_254| |c_ULTIMATE.start_sll_circular_create_#t~ret4#1.base|))) (and (= (store |v_#memory_int_253| |c_ULTIMATE.start_sll_circular_create_#t~ret4#1.base| (store (select |v_#memory_int_253| |c_ULTIMATE.start_sll_circular_create_#t~ret4#1.base|) 0 (select .cse14 0))) |v_#memory_int_254|) (= (store |v_#memory_int_254| |c_ULTIMATE.start_sll_circular_create_#t~ret4#1.base| (store .cse14 4 1)) |c_#memory_int|))))) (.cse1 (<= 8 (select |c_#length| |c_ULTIMATE.start_sll_circular_create_#t~ret4#1.base|))) (.cse2 (= (select |c_ULTIMATE.start_main_old_#valid#1| 0) 0)) (.cse3 (exists ((|v_#memory_$Pointer$.offset_260| (Array Int (Array Int Int)))) (= |c_#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_260| |c_ULTIMATE.start_sll_circular_create_#t~ret4#1.base| (store (store (select |v_#memory_$Pointer$.offset_260| |c_ULTIMATE.start_sll_circular_create_#t~ret4#1.base|) 0 0) 4 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_#t~ret4#1.base|) 4)))))) (.cse4 (= (select |c_ULTIMATE.start_main_old_#valid#1| 2) 1)) (.cse5 (<= (+ |c_ULTIMATE.start_sll_circular_create_#t~ret4#1.base| 1) |c_#StackHeapBarrier|)) (.cse6 (exists ((|v_#memory_$Pointer$.base_270| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_270| |c_ULTIMATE.start_sll_circular_create_#t~ret4#1.base| (store (store (select |v_#memory_$Pointer$.base_270| |c_ULTIMATE.start_sll_circular_create_#t~ret4#1.base|) 0 0) 4 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_#t~ret4#1.base|) 4))) |c_#memory_$Pointer$.base|))) (.cse7 (= (select |c_#valid| |c_ULTIMATE.start_sll_circular_create_#t~ret4#1.base|) 1)) (.cse8 (not (= |c_ULTIMATE.start_sll_circular_create_#t~ret4#1.base| 0))) (.cse9 (exists ((|v_#valid_173| (Array Int Int))) (and (= |c_#valid| (store |v_#valid_173| |c_ULTIMATE.start_sll_circular_create_#t~ret4#1.base| 1)) (= (select |v_#valid_173| |c_ULTIMATE.start_sll_circular_create_#t~ret4#1.base|) 0)))) (.cse10 (= (select |c_ULTIMATE.start_main_old_#valid#1| 1) 1)) (.cse12 (exists ((|v_#length_146| (Array Int Int))) (= |c_#length| (store |v_#length_146| |c_ULTIMATE.start_sll_circular_create_#t~ret4#1.base| 8))))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 (exists ((|v_old(#memory_int)_AFTER_CALL_103| (Array Int (Array Int Int)))) (let ((.cse11 (select |v_old(#memory_int)_AFTER_CALL_103| 1))) (and (= (select .cse11 0) 48) (= (select .cse11 1) 0)))) (exists ((|v_#length_BEFORE_CALL_186| (Array Int Int))) (and (= 19 (select |v_#length_BEFORE_CALL_186| 2)) (= 2 (select |v_#length_BEFORE_CALL_186| 1)))) .cse12) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 (exists ((|v_old(#memory_int)_AFTER_CALL_104| (Array Int (Array Int Int)))) (let ((.cse13 (select |v_old(#memory_int)_AFTER_CALL_104| 1))) (and (= (select .cse13 1) 0) (= 48 (select .cse13 0))))) .cse9 .cse10 (exists ((|v_#length_BEFORE_CALL_188| (Array Int Int))) (and (= (select |v_#length_BEFORE_CALL_188| 1) 2) (= 19 (select |v_#length_BEFORE_CALL_188| 2)))) .cse12))) (= |c_ULTIMATE.start_main_~data~0#1| 1) (= 2 |c_ULTIMATE.start_sll_circular_create_#in~len#1|) (= |c_ULTIMATE.start_sll_circular_create_#in~data#1| 1) (= |c_ULTIMATE.start_sll_circular_create_~len#1| 2) (= |c_ULTIMATE.start_main_~len~0#1| 2)) is different from true [2023-12-02 18:34:23,041 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5641#(and (<= |ULTIMATE.start_sll_circular_get_data_at_~index#1| 0) (<= 1 |ULTIMATE.start_main_~expected~0#1|) (<= 1 |ULTIMATE.start_main_~len~0#1|) (<= 0 |ULTIMATE.start_sll_circular_get_data_at_#in~index#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (not (= (select |#valid| |ULTIMATE.start_sll_circular_get_data_at_~head#1.base|) 1)))' at error location [2023-12-02 18:34:23,042 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:34:23,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 18:34:23,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 28 [2023-12-02 18:34:23,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535016701] [2023-12-02 18:34:23,042 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 18:34:23,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-02 18:34:23,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:34:23,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-02 18:34:23,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2203, Unknown=15, NotChecked=594, Total=2970 [2023-12-02 18:34:23,045 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand has 29 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 18:34:23,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:34:23,542 INFO L93 Difference]: Finished difference Result 79 states and 82 transitions. [2023-12-02 18:34:23,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 18:34:23,543 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2023-12-02 18:34:23,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:34:23,543 INFO L225 Difference]: With dead ends: 79 [2023-12-02 18:34:23,543 INFO L226 Difference]: Without dead ends: 79 [2023-12-02 18:34:23,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=206, Invalid=2773, Unknown=15, NotChecked=666, Total=3660 [2023-12-02 18:34:23,546 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 73 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:34:23,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 430 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 18:34:23,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-12-02 18:34:23,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 65. [2023-12-02 18:34:23,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 50 states have (on average 1.34) internal successors, (67), 61 states have internal predecessors, (67), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:34:23,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2023-12-02 18:34:23,548 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 37 [2023-12-02 18:34:23,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:34:23,548 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2023-12-02 18:34:23,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 18:34:23,548 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2023-12-02 18:34:23,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-02 18:34:23,549 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:34:23,549 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:34:23,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 18:34:23,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-12-02 18:34:23,749 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:34:23,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:34:23,750 INFO L85 PathProgramCache]: Analyzing trace with hash -787057278, now seen corresponding path program 1 times [2023-12-02 18:34:23,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:34:23,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724506626] [2023-12-02 18:34:23,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:23,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:34:23,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:24,659 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 18:34:24,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:34:24,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724506626] [2023-12-02 18:34:24,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724506626] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:34:24,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742955501] [2023-12-02 18:34:24,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:24,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:34:24,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:34:24,661 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:34:24,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 18:34:24,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:24,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 85 conjunts are in the unsatisfiable core [2023-12-02 18:34:24,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:34:24,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:34:25,020 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 18:34:25,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 18:34:25,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 18:34:25,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 18:34:25,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:34:25,155 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:34:25,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 51 [2023-12-02 18:34:25,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 19 [2023-12-02 18:34:25,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 18:34:25,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2023-12-02 18:34:25,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 18:34:25,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2023-12-02 18:34:25,388 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:34:25,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 51 [2023-12-02 18:34:25,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 26 [2023-12-02 18:34:25,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2023-12-02 18:34:25,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-12-02 18:34:25,572 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:34:25,572 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:34:25,994 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|)) (.cse3 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|)) (.cse2 (+ |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset| 4))) (and (forall ((v_ArrVal_1602 (Array Int Int))) (or (forall ((v_ArrVal_1603 (Array Int Int))) (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_1603))) (or (forall ((v_ArrVal_1604 (Array Int Int))) (<= 0 (+ (select (select (store .cse0 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_1602) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) v_ArrVal_1604) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) 4))) (not (= v_ArrVal_1603 (store .cse1 .cse2 (select v_ArrVal_1603 .cse2)))) (< (+ (select (select .cse0 |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) 4) 0)))) (not (= v_ArrVal_1602 (store .cse3 .cse2 (select v_ArrVal_1602 .cse2)))))) (forall ((v_ArrVal_1602 (Array Int Int))) (or (forall ((v_ArrVal_1603 (Array Int Int))) (let ((.cse4 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_1603))) (or (forall ((v_ArrVal_1604 (Array Int Int)) (v_ArrVal_1605 (Array Int Int))) (let ((.cse6 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_1602))) (let ((.cse5 (select (select .cse6 |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (<= (+ (select (select (store .cse4 .cse5 v_ArrVal_1604) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) 8) (select |c_#length| (select (select (store .cse6 .cse5 v_ArrVal_1605) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)))))) (not (= v_ArrVal_1603 (store .cse1 .cse2 (select v_ArrVal_1603 .cse2)))) (< (+ (select (select .cse4 |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) 4) 0)))) (not (= v_ArrVal_1602 (store .cse3 .cse2 (select v_ArrVal_1602 .cse2)))))))) is different from false [2023-12-02 18:34:26,087 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|)) (.cse2 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|))) (and (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_140| Int)) (or (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_140| |c_ULTIMATE.start_main_~s~0#1.offset|) (forall ((v_ArrVal_1602 (Array Int Int))) (let ((.cse1 (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_140| 4))) (or (not (= v_ArrVal_1602 (store .cse0 .cse1 (select v_ArrVal_1602 .cse1)))) (forall ((v_ArrVal_1603 (Array Int Int))) (or (not (= v_ArrVal_1603 (store .cse2 .cse1 (select v_ArrVal_1603 .cse1)))) (< (+ 4 (select v_ArrVal_1603 |c_ULTIMATE.start_main_~s~0#1.offset|)) 0) (forall ((v_ArrVal_1604 (Array Int Int)) (v_ArrVal_1605 (Array Int Int))) (let ((.cse3 (select v_ArrVal_1602 |c_ULTIMATE.start_main_~s~0#1.offset|))) (<= (+ 8 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base| v_ArrVal_1603) .cse3 v_ArrVal_1604) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) (select |c_#length| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| v_ArrVal_1602) .cse3 v_ArrVal_1605) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)))))))))))) (forall ((v_ArrVal_1604 (Array Int Int)) (v_ArrVal_1603 (Array Int Int)) (|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_140| Int) (v_DerPreprocessor_10 Int)) (let ((.cse4 (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_140| 4))) (or (< 0 (+ 5 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base| v_ArrVal_1603) (select (store .cse0 .cse4 v_DerPreprocessor_10) |c_ULTIMATE.start_main_~s~0#1.offset|) v_ArrVal_1604) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_140| |c_ULTIMATE.start_main_~s~0#1.offset|) (not (= v_ArrVal_1603 (store .cse2 .cse4 (select v_ArrVal_1603 .cse4)))) (< (+ 4 (select v_ArrVal_1603 |c_ULTIMATE.start_main_~s~0#1.offset|)) 0)))))) is different from false [2023-12-02 18:34:26,147 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1601 (Array Int Int)) (v_ArrVal_1600 (Array Int Int)) (|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_140| Int)) (or (forall ((v_ArrVal_1602 (Array Int Int))) (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1600)) (.cse1 (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_140| 4))) (or (forall ((v_ArrVal_1603 (Array Int Int))) (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1601))) (or (< (+ 4 (select v_ArrVal_1603 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)) 0) (not (= (store (select .cse0 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) .cse1 (select v_ArrVal_1603 .cse1)) v_ArrVal_1603)) (forall ((v_ArrVal_1604 (Array Int Int)) (v_ArrVal_1605 (Array Int Int))) (let ((.cse2 (select v_ArrVal_1602 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (<= (+ 8 (select (select (store (store .cse0 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| v_ArrVal_1603) .cse2 v_ArrVal_1604) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)) (select |c_#length| (select (select (store (store .cse3 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| v_ArrVal_1602) .cse2 v_ArrVal_1605) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)))))))) (not (= v_ArrVal_1602 (store (select .cse3 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) .cse1 (select v_ArrVal_1602 .cse1))))))) (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_140| |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (forall ((v_ArrVal_1604 (Array Int Int)) (v_ArrVal_1603 (Array Int Int)) (v_ArrVal_1601 (Array Int Int)) (v_ArrVal_1600 (Array Int Int)) (|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_140| Int) (v_DerPreprocessor_10 Int)) (let ((.cse4 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1601)) (.cse5 (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_140| 4))) (or (< 0 (+ 5 (select (select (store (store .cse4 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| v_ArrVal_1603) (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1600) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) .cse5 v_DerPreprocessor_10) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) v_ArrVal_1604) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (< (+ 4 (select v_ArrVal_1603 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)) 0) (not (= (store (select .cse4 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) .cse5 (select v_ArrVal_1603 .cse5)) v_ArrVal_1603)) (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_140| |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))))) is different from false [2023-12-02 18:34:26,225 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:34:26,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 88 [2023-12-02 18:34:26,236 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:34:26,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 112 [2023-12-02 18:34:26,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2023-12-02 18:34:26,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2023-12-02 18:34:26,267 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:34:26,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 40 [2023-12-02 18:34:26,276 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 18:34:26,284 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:34:26,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 41 [2023-12-02 18:34:26,297 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:34:26,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 40 [2023-12-02 18:34:26,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-12-02 18:34:26,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-12-02 18:34:26,326 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 18:34:26,333 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:34:26,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 41 [2023-12-02 18:34:26,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-12-02 18:34:26,368 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 18:34:26,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2023-12-02 18:34:26,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-12-02 18:34:26,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-12-02 18:34:26,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2023-12-02 18:34:26,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2023-12-02 18:34:26,472 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 18:34:26,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 1 [2023-12-02 18:34:26,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742955501] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:34:26,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [859628857] [2023-12-02 18:34:26,727 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 18:34:26,727 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:34:26,728 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:34:26,728 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:34:26,728 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:34:27,960 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 43 for LOIs [2023-12-02 18:34:28,006 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:34:30,965 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6042#(and (or (< (+ |ULTIMATE.start_sll_circular_get_data_at_~head#1.offset| 4) 0) (< (select |#length| |ULTIMATE.start_sll_circular_get_data_at_~head#1.base|) (+ |ULTIMATE.start_sll_circular_get_data_at_~head#1.offset| 8))) (<= |ULTIMATE.start_sll_circular_get_data_at_~index#1| 0) (<= 1 |ULTIMATE.start_main_~expected~0#1|) (<= 1 |ULTIMATE.start_main_~len~0#1|) (<= 0 |ULTIMATE.start_sll_circular_get_data_at_#in~index#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|))' at error location [2023-12-02 18:34:30,965 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:34:30,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 18:34:30,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2023-12-02 18:34:30,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879423396] [2023-12-02 18:34:30,965 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 18:34:30,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-02 18:34:30,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:34:30,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-02 18:34:30,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=3818, Unknown=3, NotChecked=378, Total=4422 [2023-12-02 18:34:30,968 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 37 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 18:34:31,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:34:31,670 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2023-12-02 18:34:31,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 18:34:31,670 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2023-12-02 18:34:31,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:34:31,671 INFO L225 Difference]: With dead ends: 64 [2023-12-02 18:34:31,671 INFO L226 Difference]: Without dead ends: 64 [2023-12-02 18:34:31,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=295, Invalid=4544, Unknown=3, NotChecked=414, Total=5256 [2023-12-02 18:34:31,674 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 120 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:34:31,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 471 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 18:34:31,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-12-02 18:34:31,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2023-12-02 18:34:31,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 59 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:34:31,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2023-12-02 18:34:31,677 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 37 [2023-12-02 18:34:31,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:34:31,677 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2023-12-02 18:34:31,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 18:34:31,677 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2023-12-02 18:34:31,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-02 18:34:31,678 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:34:31,678 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:34:31,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 18:34:31,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-12-02 18:34:31,878 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:34:31,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:34:31,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1485684196, now seen corresponding path program 1 times [2023-12-02 18:34:31,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:34:31,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052126088] [2023-12-02 18:34:31,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:31,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:34:31,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:31,939 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 18:34:31,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:34:31,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052126088] [2023-12-02 18:34:31,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052126088] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:34:31,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209860091] [2023-12-02 18:34:31,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:31,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:34:31,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:34:31,941 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:34:31,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 18:34:32,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:32,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 18:34:32,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:34:32,120 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 18:34:32,120 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:34:32,145 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 18:34:32,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209860091] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:34:32,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [118930054] [2023-12-02 18:34:32,147 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-12-02 18:34:32,147 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:34:32,147 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:34:32,147 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:34:32,148 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:34:32,828 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 43 for LOIs [2023-12-02 18:34:32,872 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:34:35,509 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6428#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_sll_circular_get_data_at_#res#1| 2147483648)) (= |ULTIMATE.start_sll_circular_create_#res#1.offset| 0) (<= 8 (select |#length| |ULTIMATE.start_main_~s~0#1.base|)) (= |ULTIMATE.start_sll_circular_get_data_at_#res#1| (select (select |#memory_int| |ULTIMATE.start_main_~s~0#1.base|) 4)) (= 2 |ULTIMATE.start_main_~expected~0#1|) (<= |ULTIMATE.start_sll_circular_get_data_at_#res#1| 2147483647) (= |ULTIMATE.start_main_~data~0#1| 1) (= (select |#valid| |ULTIMATE.start_main_~s~0#1.base|) 1) (= |ULTIMATE.start_main_~len~0#1| 2) (not (= |ULTIMATE.start_sll_circular_get_data_at_#res#1| 2)) (= |ULTIMATE.start_main_~s~0#1.offset| 0))' at error location [2023-12-02 18:34:35,510 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:34:35,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:34:35,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2023-12-02 18:34:35,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981964880] [2023-12-02 18:34:35,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:34:35,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 18:34:35,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:34:35,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 18:34:35,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2023-12-02 18:34:35,511 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:34:35,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:34:35,575 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2023-12-02 18:34:35,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:34:35,576 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2023-12-02 18:34:35,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:34:35,576 INFO L225 Difference]: With dead ends: 63 [2023-12-02 18:34:35,576 INFO L226 Difference]: Without dead ends: 63 [2023-12-02 18:34:35,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2023-12-02 18:34:35,577 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 74 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:34:35,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 99 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:34:35,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-12-02 18:34:35,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2023-12-02 18:34:35,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 49 states have (on average 1.3061224489795917) internal successors, (64), 59 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:34:35,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2023-12-02 18:34:35,580 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 38 [2023-12-02 18:34:35,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:34:35,580 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2023-12-02 18:34:35,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:34:35,580 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2023-12-02 18:34:35,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-02 18:34:35,580 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:34:35,581 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:34:35,590 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 18:34:35,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-02 18:34:35,781 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:34:35,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:34:35,782 INFO L85 PathProgramCache]: Analyzing trace with hash -993701830, now seen corresponding path program 1 times [2023-12-02 18:34:35,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:34:35,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461152299] [2023-12-02 18:34:35,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:35,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:34:35,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:37,001 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:34:37,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:34:37,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461152299] [2023-12-02 18:34:37,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461152299] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:34:37,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695915787] [2023-12-02 18:34:37,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:37,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:34:37,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:34:37,003 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:34:37,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 18:34:37,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:37,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 97 conjunts are in the unsatisfiable core [2023-12-02 18:34:37,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:34:37,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:34:37,399 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 18:34:37,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 18:34:37,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:34:37,538 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:34:37,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2023-12-02 18:34:37,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 18:34:37,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2023-12-02 18:34:37,860 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:34:37,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 59 [2023-12-02 18:34:37,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-12-02 18:34:37,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2023-12-02 18:34:38,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2023-12-02 18:34:38,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-12-02 18:34:38,203 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:34:38,203 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:34:38,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 56 [2023-12-02 18:34:38,453 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1824 (Array Int Int))) (= |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_1824) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (= |c_ULTIMATE.start_sll_circular_update_at_~data#1| (+ |c_ULTIMATE.start_main_~len~0#1| 1)) (forall ((v_ArrVal_1823 (Array Int Int))) (= |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset| (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_1823) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)))) is different from false [2023-12-02 18:34:38,474 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:34:38,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2023-12-02 18:34:38,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2023-12-02 18:34:38,632 WARN L854 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~i~0#1| 0) (forall ((v_ArrVal_1821 (Array Int Int))) (or (not (= |c_ULTIMATE.start_main_~s~0#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_1821) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (not (= v_ArrVal_1821 (let ((.cse0 (+ |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset| 4))) (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|) .cse0 (select v_ArrVal_1821 .cse0)))))))) is different from false [2023-12-02 18:34:38,753 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_12 Int) (v_ArrVal_1820 (Array Int Int)) (|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_166| Int)) (or (not (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1820) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_166| 4) v_DerPreprocessor_12) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_166| |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) is different from false [2023-12-02 18:34:38,766 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:34:38,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2023-12-02 18:34:38,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2023-12-02 18:34:38,771 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 18:34:38,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2023-12-02 18:34:38,776 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 18:34:38,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2023-12-02 18:34:39,236 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2023-12-02 18:34:39,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695915787] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:34:39,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [394823842] [2023-12-02 18:34:39,238 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 18:34:39,238 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:34:39,238 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:34:39,238 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:34:39,239 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:34:40,148 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 43 for LOIs [2023-12-02 18:34:40,192 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:34:45,232 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6873#(and (exists ((|v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_99| Int) (|v_ULTIMATE.start_sll_circular_get_data_at_#in~index#1_49| Int) (|v_ULTIMATE.start_sll_circular_get_data_at_~head#1.offset_96| Int) (|v_ULTIMATE.start_sll_circular_get_data_at_#in~head#1.base_43| Int)) (and (<= 0 (+ 4 |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.offset_96|)) (= |ULTIMATE.start_sll_circular_get_data_at_#res#1| (select (select |#memory_int| |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_99|) (+ 4 |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.offset_96|))) (= (select |#valid| |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_99|) 1) (<= (+ 8 |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.offset_96|) (select |#length| |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_99|)) (or (and (= |v_ULTIMATE.start_sll_circular_get_data_at_#in~index#1_49| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_99| |v_ULTIMATE.start_sll_circular_get_data_at_#in~head#1.base_43|) (= 2 |ULTIMATE.start_main_~expected~0#1|) (= |ULTIMATE.start_main_~s~0#1.base| |v_ULTIMATE.start_sll_circular_get_data_at_#in~head#1.base_43|) (= |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.offset_96| 0)) (and (<= 8 (select |#length| |ULTIMATE.start_main_~s~0#1.base|)) (= |ULTIMATE.start_main_~i~0#1| 1) (= 3 |ULTIMATE.start_main_~expected~0#1|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_get_data_at_#in~head#1.base_43|) 0) |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_99|) (= |v_ULTIMATE.start_sll_circular_get_data_at_#in~index#1_49| 1) (= (select |#valid| |ULTIMATE.start_main_~s~0#1.base|) 1) (= |ULTIMATE.start_main_~s~0#1.base| |v_ULTIMATE.start_sll_circular_get_data_at_#in~head#1.base_43|) (= 2 (select (select |#memory_int| |ULTIMATE.start_main_~s~0#1.base|) 4)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_circular_get_data_at_#in~head#1.base_43|) 0) |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.offset_96|))))) (<= 0 (+ |ULTIMATE.start_sll_circular_get_data_at_#res#1| 2147483648)) (= |ULTIMATE.start_sll_circular_create_#res#1.offset| 0) (not (= |ULTIMATE.start_sll_circular_get_data_at_#res#1| |ULTIMATE.start_main_~expected~0#1|)) (<= |ULTIMATE.start_sll_circular_get_data_at_#res#1| 2147483647) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_main_~s~0#1.offset| 0))' at error location [2023-12-02 18:34:45,232 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:34:45,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:34:45,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 23] total 63 [2023-12-02 18:34:45,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673746318] [2023-12-02 18:34:45,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:34:45,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-12-02 18:34:45,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:34:45,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-12-02 18:34:45,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=6191, Unknown=8, NotChecked=480, Total=6972 [2023-12-02 18:34:45,237 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 63 states, 57 states have (on average 1.736842105263158) internal successors, (99), 55 states have internal predecessors, (99), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 18:34:47,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:34:47,108 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2023-12-02 18:34:47,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-02 18:34:47,108 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 57 states have (on average 1.736842105263158) internal successors, (99), 55 states have internal predecessors, (99), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 40 [2023-12-02 18:34:47,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:34:47,109 INFO L225 Difference]: With dead ends: 60 [2023-12-02 18:34:47,109 INFO L226 Difference]: Without dead ends: 60 [2023-12-02 18:34:47,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1978 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=479, Invalid=9227, Unknown=8, NotChecked=588, Total=10302 [2023-12-02 18:34:47,111 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 166 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 18:34:47,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 895 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1208 Invalid, 0 Unknown, 160 Unchecked, 0.8s Time] [2023-12-02 18:34:47,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-12-02 18:34:47,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-12-02 18:34:47,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 47 states have (on average 1.297872340425532) internal successors, (61), 56 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:34:47,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2023-12-02 18:34:47,113 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 40 [2023-12-02 18:34:47,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:34:47,113 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2023-12-02 18:34:47,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 57 states have (on average 1.736842105263158) internal successors, (99), 55 states have internal predecessors, (99), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 18:34:47,113 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2023-12-02 18:34:47,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-02 18:34:47,114 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:34:47,114 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:34:47,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-02 18:34:47,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:34:47,315 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:34:47,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:34:47,315 INFO L85 PathProgramCache]: Analyzing trace with hash -739909071, now seen corresponding path program 1 times [2023-12-02 18:34:47,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:34:47,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329795688] [2023-12-02 18:34:47,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:47,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:34:47,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:47,598 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 18:34:47,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:34:47,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329795688] [2023-12-02 18:34:47,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329795688] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:34:47,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:34:47,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 18:34:47,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105251074] [2023-12-02 18:34:47,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:34:47,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 18:34:47,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:34:47,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 18:34:47,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:34:47,600 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand has 9 states, 7 states have (on average 4.285714285714286) internal successors, (30), 8 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:34:47,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:34:47,779 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2023-12-02 18:34:47,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 18:34:47,779 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 4.285714285714286) internal successors, (30), 8 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 41 [2023-12-02 18:34:47,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:34:47,780 INFO L225 Difference]: With dead ends: 58 [2023-12-02 18:34:47,780 INFO L226 Difference]: Without dead ends: 58 [2023-12-02 18:34:47,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-12-02 18:34:47,781 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 41 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:34:47,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 103 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:34:47,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-12-02 18:34:47,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-12-02 18:34:47,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 54 states have internal predecessors, (58), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:34:47,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2023-12-02 18:34:47,783 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 41 [2023-12-02 18:34:47,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:34:47,784 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2023-12-02 18:34:47,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 4.285714285714286) internal successors, (30), 8 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:34:47,784 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2023-12-02 18:34:47,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-02 18:34:47,784 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:34:47,785 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:34:47,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-12-02 18:34:47,785 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:34:47,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:34:47,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1462310868, now seen corresponding path program 1 times [2023-12-02 18:34:47,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:34:47,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067097413] [2023-12-02 18:34:47,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:47,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:34:47,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:47,924 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 18:34:47,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:34:47,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067097413] [2023-12-02 18:34:47,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067097413] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:34:47,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:34:47,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-02 18:34:47,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911962945] [2023-12-02 18:34:47,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:34:47,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 18:34:47,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:34:47,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 18:34:47,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:34:47,926 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 9 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:34:48,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:34:48,041 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2023-12-02 18:34:48,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 18:34:48,042 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2023-12-02 18:34:48,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:34:48,042 INFO L225 Difference]: With dead ends: 58 [2023-12-02 18:34:48,042 INFO L226 Difference]: Without dead ends: 58 [2023-12-02 18:34:48,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-12-02 18:34:48,043 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:34:48,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 134 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:34:48,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-12-02 18:34:48,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-12-02 18:34:48,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 54 states have internal predecessors, (57), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:34:48,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2023-12-02 18:34:48,046 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 42 [2023-12-02 18:34:48,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:34:48,047 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2023-12-02 18:34:48,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:34:48,047 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2023-12-02 18:34:48,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-02 18:34:48,048 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:34:48,048 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:34:48,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-12-02 18:34:48,048 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:34:48,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:34:48,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1912025017, now seen corresponding path program 1 times [2023-12-02 18:34:48,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:34:48,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048947440] [2023-12-02 18:34:48,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:48,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:34:48,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:48,220 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 18:34:48,220 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:34:48,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048947440] [2023-12-02 18:34:48,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048947440] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:34:48,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458648370] [2023-12-02 18:34:48,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:48,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:34:48,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:34:48,222 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:34:48,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 18:34:48,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:48,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-02 18:34:48,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:34:48,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-12-02 18:34:48,585 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 18:34:48,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:34:48,640 INFO L349 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2023-12-02 18:34:48,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-12-02 18:34:48,672 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-12-02 18:34:48,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 18:34:48,715 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 18:34:48,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458648370] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:34:48,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1595700165] [2023-12-02 18:34:48,717 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-12-02 18:34:48,717 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:34:48,717 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:34:48,718 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:34:48,718 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:34:49,842 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 43 for LOIs [2023-12-02 18:34:49,886 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:34:54,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1595700165] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:34:54,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:34:54,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [6, 12, 6] total 43 [2023-12-02 18:34:54,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163437912] [2023-12-02 18:34:54,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:34:54,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-02 18:34:54,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:34:54,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-02 18:34:54,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1725, Unknown=1, NotChecked=0, Total=1892 [2023-12-02 18:34:54,742 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 25 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:34:57,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:34:57,392 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2023-12-02 18:34:57,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-02 18:34:57,393 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2023-12-02 18:34:57,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:34:57,393 INFO L225 Difference]: With dead ends: 62 [2023-12-02 18:34:57,393 INFO L226 Difference]: Without dead ends: 62 [2023-12-02 18:34:57,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=180, Invalid=1889, Unknown=1, NotChecked=0, Total=2070 [2023-12-02 18:34:57,394 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:34:57,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 114 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 858 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2023-12-02 18:34:57,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-12-02 18:34:57,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2023-12-02 18:34:57,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 55 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:34:57,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2023-12-02 18:34:57,396 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 43 [2023-12-02 18:34:57,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:34:57,396 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2023-12-02 18:34:57,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:34:57,397 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2023-12-02 18:34:57,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-02 18:34:57,397 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:34:57,397 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:34:57,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 18:34:57,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:34:57,598 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:34:57,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:34:57,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1912025018, now seen corresponding path program 1 times [2023-12-02 18:34:57,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:34:57,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110817494] [2023-12-02 18:34:57,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:57,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:34:57,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:58,413 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 18:34:58,413 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:34:58,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110817494] [2023-12-02 18:34:58,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110817494] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:34:58,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606328572] [2023-12-02 18:34:58,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:58,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:34:58,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:34:58,415 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:34:58,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 18:34:58,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:58,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 103 conjunts are in the unsatisfiable core [2023-12-02 18:34:58,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:34:58,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:34:58,624 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 18:34:58,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 18:34:58,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:34:58,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:34:58,687 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:34:58,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 38 [2023-12-02 18:34:58,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-12-02 18:34:58,792 INFO L349 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2023-12-02 18:34:58,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2023-12-02 18:34:58,805 INFO L349 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2023-12-02 18:34:58,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 17 [2023-12-02 18:34:58,952 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:34:58,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2023-12-02 18:34:59,044 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 18:34:59,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 37 [2023-12-02 18:34:59,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-12-02 18:34:59,369 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 18:34:59,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:34:59,520 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:34:59,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2023-12-02 18:34:59,600 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:34:59,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2023-12-02 18:35:00,179 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_13 Int) (|v_ULTIMATE.start_main_~s~0#1.offset_27| Int) (v_ArrVal_2146 (Array Int Int)) (v_ArrVal_2145 (Array Int Int)) (v_ArrVal_2143 (Array Int Int)) (|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_188| Int) (v_ArrVal_2142 (Array Int Int))) (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_2142)) (.cse1 (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_188| 4))) (or (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_188| |v_ULTIMATE.start_main_~s~0#1.offset_27|) (< |v_ULTIMATE.start_main_~s~0#1.offset_27| 0) (< 0 (+ (select (select (store (store .cse0 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| v_ArrVal_2145) (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_2143) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) .cse1 v_DerPreprocessor_13) |v_ULTIMATE.start_main_~s~0#1.offset_27|) v_ArrVal_2146) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |v_ULTIMATE.start_main_~s~0#1.offset_27|) 1)) (< |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset| |v_ULTIMATE.start_main_~s~0#1.offset_27|) (not (= v_ArrVal_2145 (store (select .cse0 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) .cse1 (select v_ArrVal_2145 .cse1))))))) is different from false [2023-12-02 18:35:00,215 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:35:00,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 39 [2023-12-02 18:35:00,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 66 [2023-12-02 18:35:00,229 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:35:00,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 104 [2023-12-02 18:35:00,235 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 18:35:00,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2023-12-02 18:35:00,243 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 18:35:00,253 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:35:00,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2023-12-02 18:35:00,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2023-12-02 18:35:00,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2023-12-02 18:35:00,300 INFO L349 Elim1Store]: treesize reduction 16, result has 61.9 percent of original size [2023-12-02 18:35:00,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 57 [2023-12-02 18:35:00,315 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:35:00,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2023-12-02 18:35:00,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-12-02 18:35:00,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-12-02 18:35:00,406 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:35:00,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 34 [2023-12-02 18:35:00,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606328572] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:35:00,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1720573127] [2023-12-02 18:35:00,703 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-12-02 18:35:00,703 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:35:00,703 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:35:00,703 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:35:00,703 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:35:02,009 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 43 for LOIs [2023-12-02 18:35:02,073 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:35:05,825 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7993#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_circular_destroy_#in~head#1.offset|) (<= 0 |ULTIMATE.start_sll_circular_destroy_~head#1.offset|))' at error location [2023-12-02 18:35:05,825 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:35:05,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 18:35:05,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 35 [2023-12-02 18:35:05,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873419783] [2023-12-02 18:35:05,826 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 18:35:05,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-02 18:35:05,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:35:05,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-02 18:35:05,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=4981, Unknown=21, NotChecked=142, Total=5402 [2023-12-02 18:35:05,828 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 36 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:35:06,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:35:06,900 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2023-12-02 18:35:06,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 18:35:06,900 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2023-12-02 18:35:06,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:35:06,901 INFO L225 Difference]: With dead ends: 60 [2023-12-02 18:35:06,901 INFO L226 Difference]: Without dead ends: 60 [2023-12-02 18:35:06,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1610 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=421, Invalid=6534, Unknown=21, NotChecked=164, Total=7140 [2023-12-02 18:35:06,902 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 307 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 1060 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 18:35:06,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 226 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1060 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 18:35:06,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-12-02 18:35:06,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2023-12-02 18:35:06,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 48 states have (on average 1.1875) internal successors, (57), 55 states have internal predecessors, (57), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:35:06,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2023-12-02 18:35:06,904 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 43 [2023-12-02 18:35:06,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:35:06,905 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2023-12-02 18:35:06,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:35:06,905 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2023-12-02 18:35:06,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 18:35:06,905 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:35:06,905 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:35:06,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-02 18:35:07,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-12-02 18:35:07,106 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:35:07,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:35:07,106 INFO L85 PathProgramCache]: Analyzing trace with hash -789896775, now seen corresponding path program 1 times [2023-12-02 18:35:07,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:35:07,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365408772] [2023-12-02 18:35:07,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:35:07,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:35:07,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:35:07,783 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:35:07,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:35:07,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365408772] [2023-12-02 18:35:07,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365408772] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:35:07,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722442170] [2023-12-02 18:35:07,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:35:07,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:35:07,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:35:07,784 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:35:07,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-02 18:35:07,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:35:07,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 79 conjunts are in the unsatisfiable core [2023-12-02 18:35:07,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:35:07,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:35:08,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-12-02 18:35:08,028 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 18:35:08,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 18:35:08,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:35:08,101 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:35:08,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2023-12-02 18:35:08,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 18:35:08,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2023-12-02 18:35:08,262 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:35:08,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2023-12-02 18:35:08,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-12-02 18:35:08,391 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 18:35:08,392 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:35:08,516 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2256 (Array Int Int))) (< (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_2256) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) |c_#StackHeapBarrier|)) is different from false [2023-12-02 18:35:08,592 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2256 (Array Int Int))) (< (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) v_ArrVal_2256) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) |c_#StackHeapBarrier|)) is different from false [2023-12-02 18:35:08,602 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2256 (Array Int Int)) (v_ArrVal_2255 (Array Int Int))) (or (not (= (let ((.cse0 (+ |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset| 4))) (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|) .cse0 (select v_ArrVal_2255 .cse0))) v_ArrVal_2255)) (< (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_2255))) (store .cse1 (select (select .cse1 |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) v_ArrVal_2256)) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) |c_#StackHeapBarrier|))) is different from false [2023-12-02 18:35:08,621 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2256 (Array Int Int)) (v_ArrVal_2255 (Array Int Int)) (|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_203| Int)) (or (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_203| |c_ULTIMATE.start_main_~s~0#1.offset|) (< (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| v_ArrVal_2255) (select v_ArrVal_2255 |c_ULTIMATE.start_main_~s~0#1.offset|) v_ArrVal_2256) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) |c_#StackHeapBarrier|) (not (= (let ((.cse0 (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_203| 4))) (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse0 (select v_ArrVal_2255 .cse0))) v_ArrVal_2255)))) is different from false [2023-12-02 18:35:08,642 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2256 (Array Int Int)) (v_ArrVal_2255 (Array Int Int)) (v_ArrVal_2254 (Array Int Int)) (|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_203| Int)) (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_2254))) (or (not (= v_ArrVal_2255 (let ((.cse1 (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_203| 4))) (store (select .cse0 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) .cse1 (select v_ArrVal_2255 .cse1))))) (< (select (select (store (store .cse0 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| v_ArrVal_2255) (select v_ArrVal_2255 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) v_ArrVal_2256) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) |c_#StackHeapBarrier|) (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_203| |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)))) is different from false [2023-12-02 18:35:08,663 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:35:08,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 50 [2023-12-02 18:35:08,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2023-12-02 18:35:08,672 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 18:35:08,678 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:35:08,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 50 [2023-12-02 18:35:08,687 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:35:08,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2023-12-02 18:35:08,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2023-12-02 18:35:08,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-12-02 18:35:08,724 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 18:35:08,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2023-12-02 18:35:08,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2023-12-02 18:35:08,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722442170] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:35:08,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [968563902] [2023-12-02 18:35:08,897 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 18:35:08,897 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:35:08,897 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:35:08,897 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:35:08,898 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:35:10,208 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 43 for LOIs [2023-12-02 18:35:10,252 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:35:14,355 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8420#(and (= |ULTIMATE.start_sll_circular_destroy_~head#1.offset| |ULTIMATE.start_sll_circular_destroy_#in~head#1.offset|) (= |ULTIMATE.start_sll_circular_destroy_#in~head#1.base| |ULTIMATE.start_main_~s~0#1.base|) (= |ULTIMATE.start_sll_circular_destroy_~q~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_circular_destroy_~p~0#1.base|) 0)) (= (select |#valid| |ULTIMATE.start_sll_circular_destroy_~p~0#1.base|) 1) (or (not (= |ULTIMATE.start_sll_circular_destroy_~head#1.base| 0)) (not (= |ULTIMATE.start_sll_circular_destroy_~head#1.offset| 0))) (exists ((|v_ULTIMATE.start_main_~expected~0#1_71| Int)) (and (or (= |ULTIMATE.start_main_~i~0#1| 0) (and (= |ULTIMATE.start_sll_circular_get_data_at_#res#1| |v_ULTIMATE.start_main_~expected~0#1_71|) (exists ((|v_ULTIMATE.start_sll_circular_get_data_at_~head#1.offset_144| Int) (|v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_149| Int)) (and (<= 0 (+ 4 |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.offset_144|)) (= (select |#valid| |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_149|) 1) (= |ULTIMATE.start_sll_circular_get_data_at_#res#1| (select (select |#memory_int| |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_149|) (+ 4 |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.offset_144|))) (<= (+ 8 |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.offset_144|) (select |#length| |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_149|)))))) (or (= |ULTIMATE.start_main_~i~0#1| 0) (and (<= 1 |ULTIMATE.start_main_~len~0#1|) (<= 1 |v_ULTIMATE.start_main_~expected~0#1_71|) (<= |v_ULTIMATE.start_main_~expected~0#1_71| 2147483647))))) (= |ULTIMATE.start_sll_circular_destroy_#in~head#1.offset| |ULTIMATE.start_main_~s~0#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_circular_destroy_~p~0#1.base|) 0) |ULTIMATE.start_sll_circular_destroy_~q~0#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_circular_destroy_~head#1.base|) |ULTIMATE.start_sll_circular_destroy_~head#1.offset|) 0) (= |ULTIMATE.start_sll_circular_destroy_~p~0#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_circular_destroy_~head#1.base|) |ULTIMATE.start_sll_circular_destroy_~head#1.offset|) |ULTIMATE.start_sll_circular_destroy_~p~0#1.base|) (= (select |#valid| |ULTIMATE.start_sll_circular_destroy_~head#1.base|) 1) (<= |#StackHeapBarrier| |ULTIMATE.start_sll_circular_destroy_~p~0#1.base|) (<= |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~i~0#1|) (<= (+ |ULTIMATE.start_sll_circular_destroy_~head#1.offset| 4) (select |#length| |ULTIMATE.start_sll_circular_destroy_~head#1.base|)) (<= 4 (select |#length| |ULTIMATE.start_sll_circular_destroy_~p~0#1.base|)) (<= 0 |ULTIMATE.start_sll_circular_destroy_~head#1.offset|) (= |ULTIMATE.start_sll_circular_destroy_#in~head#1.base| |ULTIMATE.start_sll_circular_destroy_~head#1.base|) (or (not (= |ULTIMATE.start_sll_circular_destroy_~head#1.offset| 0)) (not (= |ULTIMATE.start_sll_circular_destroy_~p~0#1.base| |ULTIMATE.start_sll_circular_destroy_~head#1.base|))))' at error location [2023-12-02 18:35:14,355 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:35:14,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 18:35:14,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 27 [2023-12-02 18:35:14,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507063995] [2023-12-02 18:35:14,355 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 18:35:14,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-02 18:35:14,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:35:14,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-02 18:35:14,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=3106, Unknown=20, NotChecked=580, Total=3906 [2023-12-02 18:35:14,357 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 28 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:35:15,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:35:15,092 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2023-12-02 18:35:15,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-02 18:35:15,093 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2023-12-02 18:35:15,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:35:15,093 INFO L225 Difference]: With dead ends: 59 [2023-12-02 18:35:15,093 INFO L226 Difference]: Without dead ends: 59 [2023-12-02 18:35:15,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 75 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=252, Invalid=3780, Unknown=20, NotChecked=640, Total=4692 [2023-12-02 18:35:15,094 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 79 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 18:35:15,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 159 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 18:35:15,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-12-02 18:35:15,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-12-02 18:35:15,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 55 states have internal predecessors, (56), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:35:15,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2023-12-02 18:35:15,097 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 45 [2023-12-02 18:35:15,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:35:15,097 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2023-12-02 18:35:15,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:35:15,097 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2023-12-02 18:35:15,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-02 18:35:15,098 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:35:15,098 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:35:15,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-02 18:35:15,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-12-02 18:35:15,299 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:35:15,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:35:15,299 INFO L85 PathProgramCache]: Analyzing trace with hash 311149322, now seen corresponding path program 1 times [2023-12-02 18:35:15,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:35:15,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778524702] [2023-12-02 18:35:15,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:35:15,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:35:15,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:35:16,432 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:35:16,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:35:16,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778524702] [2023-12-02 18:35:16,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778524702] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:35:16,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070782335] [2023-12-02 18:35:16,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:35:16,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:35:16,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:35:16,434 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:35:16,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-02 18:35:16,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:35:16,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 100 conjunts are in the unsatisfiable core [2023-12-02 18:35:16,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:35:16,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:35:16,753 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 18:35:16,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 18:35:16,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:35:16,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:35:16,912 INFO L349 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2023-12-02 18:35:16,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 34 [2023-12-02 18:35:16,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 19 [2023-12-02 18:35:17,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 18:35:17,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2023-12-02 18:35:17,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 18:35:17,043 INFO L349 Elim1Store]: treesize reduction 63, result has 14.9 percent of original size [2023-12-02 18:35:17,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 29 [2023-12-02 18:35:17,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 18:35:17,217 INFO L349 Elim1Store]: treesize reduction 51, result has 12.1 percent of original size [2023-12-02 18:35:17,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 52 [2023-12-02 18:35:17,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 19 [2023-12-02 18:35:17,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-02 18:35:17,557 INFO L349 Elim1Store]: treesize reduction 44, result has 58.1 percent of original size [2023-12-02 18:35:17,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 77 treesize of output 107 [2023-12-02 18:35:17,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 18:35:17,951 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 18:35:17,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:35:21,106 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (= |c_ULTIMATE.start_main_~s~0#1.offset| 0)) (.cse7 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|)) (.cse4 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|)) (.cse5 (+ |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset| 4))) (and (or .cse0 (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_218| Int) (v_ArrVal_2369 (Array Int Int)) (v_ArrVal_2372 (Array Int Int)) (v_ArrVal_2371 (Array Int Int)) (v_ArrVal_2370 (Array Int Int))) (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_2369))) (let ((.cse6 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_2370)) (.cse3 (select (select .cse2 |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (or (= (select |c_#valid| (select (let ((.cse1 (store .cse2 .cse3 v_ArrVal_2371))) (select .cse1 (select (select .cse1 |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) 0)) 1) (not (= (store .cse4 .cse5 (select v_ArrVal_2370 .cse5)) v_ArrVal_2370)) (not (= (select (select (store .cse6 .cse3 v_ArrVal_2372) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) 0)) (not (= v_ArrVal_2369 (store .cse7 .cse5 (select v_ArrVal_2369 .cse5)))) (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_218| (select (select .cse6 |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) (not (= (let ((.cse8 (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_218| 4))) (store (select .cse2 .cse3) .cse8 (select v_ArrVal_2371 .cse8))) v_ArrVal_2371))))))) (forall ((v_ArrVal_2370 (Array Int Int))) (or (forall ((v_ArrVal_2369 (Array Int Int)) (v_ArrVal_2372 (Array Int Int))) (let ((.cse12 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_2369))) (let ((.cse15 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_2370)) (.cse13 (select (select .cse12 |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (or (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_218| Int)) (or (forall ((v_ArrVal_2371 (Array Int Int))) (let ((.cse9 (store .cse12 .cse13 v_ArrVal_2371))) (let ((.cse11 (select .cse9 |c_ULTIMATE.start_main_~s~0#1.base|))) (or (not (let ((.cse10 (select .cse11 |c_ULTIMATE.start_main_~s~0#1.offset|))) (= (select (select .cse9 .cse10) 0) .cse10))) (not (= (let ((.cse14 (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_218| 4))) (store (select .cse12 .cse13) .cse14 (select v_ArrVal_2371 .cse14))) v_ArrVal_2371)) (= (select .cse11 0) |c_ULTIMATE.start_main_~s~0#1.base|))))) (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_218| (select (select .cse15 |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)))) (not (= (select (select (store .cse15 .cse13 v_ArrVal_2372) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) 0)) (not (= v_ArrVal_2369 (store .cse7 .cse5 (select v_ArrVal_2369 .cse5)))))))) (not (= (store .cse4 .cse5 (select v_ArrVal_2370 .cse5)) v_ArrVal_2370)))) (or (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_218| Int) (v_ArrVal_2369 (Array Int Int)) (v_ArrVal_2372 (Array Int Int)) (v_ArrVal_2371 (Array Int Int)) (v_ArrVal_2370 (Array Int Int))) (let ((.cse18 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_2369))) (let ((.cse20 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_2370)) (.cse19 (select (select .cse18 |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (or (not (let ((.cse16 (store .cse18 .cse19 v_ArrVal_2371))) (let ((.cse17 (select (select .cse16 |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (= (select (select .cse16 .cse17) 0) .cse17)))) (not (= (store .cse4 .cse5 (select v_ArrVal_2370 .cse5)) v_ArrVal_2370)) (not (= (select (select (store .cse20 .cse19 v_ArrVal_2372) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) 0)) (not (= v_ArrVal_2369 (store .cse7 .cse5 (select v_ArrVal_2369 .cse5)))) (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_218| (select (select .cse20 |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) (not (= (let ((.cse21 (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_218| 4))) (store (select .cse18 .cse19) .cse21 (select v_ArrVal_2371 .cse21))) v_ArrVal_2371)))))) .cse0) (forall ((v_ArrVal_2370 (Array Int Int))) (or (forall ((v_ArrVal_2369 (Array Int Int)) (v_ArrVal_2372 (Array Int Int))) (let ((.cse24 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_2369))) (let ((.cse27 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_2370)) (.cse25 (select (select .cse24 |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (or (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_218| Int)) (or (forall ((v_ArrVal_2371 (Array Int Int))) (let ((.cse22 (store .cse24 .cse25 v_ArrVal_2371))) (let ((.cse23 (select .cse22 |c_ULTIMATE.start_main_~s~0#1.base|))) (or (= (select |c_#valid| (select (select .cse22 (select .cse23 |c_ULTIMATE.start_main_~s~0#1.offset|)) 0)) 1) (not (= (let ((.cse26 (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_218| 4))) (store (select .cse24 .cse25) .cse26 (select v_ArrVal_2371 .cse26))) v_ArrVal_2371)) (= (select .cse23 0) |c_ULTIMATE.start_main_~s~0#1.base|))))) (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_218| (select (select .cse27 |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)))) (not (= (select (select (store .cse27 .cse25 v_ArrVal_2372) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) 0)) (not (= v_ArrVal_2369 (store .cse7 .cse5 (select v_ArrVal_2369 .cse5)))))))) (not (= (store .cse4 .cse5 (select v_ArrVal_2370 .cse5)) v_ArrVal_2370)))))) is different from false [2023-12-02 18:35:24,666 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse8 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|)))) (let ((.cse9 (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0)) (.cse7 (select .cse8 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|))) (and (or (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_218| Int) (|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_220| Int) (v_ArrVal_2369 (Array Int Int)) (v_ArrVal_2367 (Array Int Int)) (v_ArrVal_2372 (Array Int Int)) (v_ArrVal_2371 (Array Int Int)) (v_ArrVal_2370 (Array Int Int))) (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_2367)) (.cse3 (store .cse8 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| v_ArrVal_2369)) (.cse2 (select v_ArrVal_2369 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)) (.cse1 (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_220| 4))) (or (not (= v_ArrVal_2370 (store (select .cse0 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) .cse1 (select v_ArrVal_2370 .cse1)))) (not (= (select (select (store (store .cse0 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| v_ArrVal_2370) .cse2 v_ArrVal_2372) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) 0)) (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_220| |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (not (= v_ArrVal_2371 (let ((.cse4 (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_218| 4))) (store (select .cse3 .cse2) .cse4 (select v_ArrVal_2371 .cse4))))) (not (let ((.cse5 (store .cse3 .cse2 v_ArrVal_2371))) (let ((.cse6 (select (select .cse5 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (= (select (select .cse5 .cse6) 0) .cse6)))) (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_218| (select v_ArrVal_2370 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)) (not (= v_ArrVal_2369 (store .cse7 .cse1 (select v_ArrVal_2369 .cse1))))))) .cse9) (or (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_218| Int) (|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_220| Int) (v_ArrVal_2369 (Array Int Int)) (v_ArrVal_2367 (Array Int Int)) (v_ArrVal_2372 (Array Int Int)) (v_ArrVal_2371 (Array Int Int)) (v_ArrVal_2370 (Array Int Int))) (let ((.cse13 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_2367)) (.cse11 (store .cse8 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| v_ArrVal_2369)) (.cse12 (select v_ArrVal_2369 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)) (.cse14 (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_220| 4))) (or (= (select |c_#valid| (select (let ((.cse10 (store .cse11 .cse12 v_ArrVal_2371))) (select .cse10 (select (select .cse10 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) 0)) 1) (not (= v_ArrVal_2370 (store (select .cse13 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) .cse14 (select v_ArrVal_2370 .cse14)))) (not (= (select (select (store (store .cse13 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| v_ArrVal_2370) .cse12 v_ArrVal_2372) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) 0)) (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_220| |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (not (= v_ArrVal_2371 (let ((.cse15 (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_218| 4))) (store (select .cse11 .cse12) .cse15 (select v_ArrVal_2371 .cse15))))) (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_218| (select v_ArrVal_2370 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)) (not (= v_ArrVal_2369 (store .cse7 .cse14 (select v_ArrVal_2369 .cse14))))))) .cse9) (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_220| Int) (v_ArrVal_2367 (Array Int Int))) (or (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_220| |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (forall ((v_ArrVal_2370 (Array Int Int))) (let ((.cse16 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_2367)) (.cse17 (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_220| 4))) (or (not (= v_ArrVal_2370 (store (select .cse16 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) .cse17 (select v_ArrVal_2370 .cse17)))) (forall ((v_ArrVal_2369 (Array Int Int)) (v_ArrVal_2372 (Array Int Int))) (let ((.cse21 (select v_ArrVal_2369 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (or (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_218| Int)) (or (forall ((v_ArrVal_2371 (Array Int Int))) (let ((.cse20 (store .cse8 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| v_ArrVal_2369))) (let ((.cse18 (store .cse20 .cse21 v_ArrVal_2371))) (let ((.cse19 (select .cse18 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|))) (or (= (select |c_#valid| (select (select .cse18 (select .cse19 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)) 0)) 1) (not (= v_ArrVal_2371 (let ((.cse22 (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_218| 4))) (store (select .cse20 .cse21) .cse22 (select v_ArrVal_2371 .cse22))))) (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| (select .cse19 0))))))) (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_218| (select v_ArrVal_2370 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)))) (not (= (select (select (store (store .cse16 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| v_ArrVal_2370) .cse21 v_ArrVal_2372) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) 0)) (not (= v_ArrVal_2369 (store .cse7 .cse17 (select v_ArrVal_2369 .cse17)))))))))))) (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_220| Int) (v_ArrVal_2367 (Array Int Int))) (or (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_220| |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (forall ((v_ArrVal_2370 (Array Int Int))) (let ((.cse23 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_2367)) (.cse24 (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_220| 4))) (or (not (= v_ArrVal_2370 (store (select .cse23 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) .cse24 (select v_ArrVal_2370 .cse24)))) (forall ((v_ArrVal_2369 (Array Int Int)) (v_ArrVal_2372 (Array Int Int))) (let ((.cse25 (select v_ArrVal_2369 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (or (not (= (select (select (store (store .cse23 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| v_ArrVal_2370) .cse25 v_ArrVal_2372) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) 0)) (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_218| Int)) (or (forall ((v_ArrVal_2371 (Array Int Int))) (let ((.cse26 (store .cse8 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| v_ArrVal_2369))) (let ((.cse29 (store .cse26 .cse25 v_ArrVal_2371))) (let ((.cse28 (select .cse29 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|))) (or (not (= v_ArrVal_2371 (let ((.cse27 (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_218| 4))) (store (select .cse26 .cse25) .cse27 (select v_ArrVal_2371 .cse27))))) (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| (select .cse28 0)) (not (let ((.cse30 (select .cse28 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (= (select (select .cse29 .cse30) 0) .cse30)))))))) (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_218| (select v_ArrVal_2370 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)))) (not (= v_ArrVal_2369 (store .cse7 .cse24 (select v_ArrVal_2369 .cse24))))))))))))))) is different from false [2023-12-02 18:35:26,114 INFO L349 Elim1Store]: treesize reduction 472, result has 30.8 percent of original size [2023-12-02 18:35:26,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 46 case distinctions, treesize of input 4288 treesize of output 4218 [2023-12-02 18:35:27,236 INFO L349 Elim1Store]: treesize reduction 565, result has 28.8 percent of original size [2023-12-02 18:35:27,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 11 new quantified variables, introduced 56 case distinctions, treesize of input 2137 treesize of output 2283 [2023-12-02 18:35:27,874 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:35:27,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1966 treesize of output 2189 [2023-12-02 18:35:29,245 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:35:29,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 1985 treesize of output 2445 [2023-12-02 18:35:29,667 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:35:29,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 1861 treesize of output 1838 [2023-12-02 18:35:29,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1829 treesize of output 1827 [2023-12-02 18:35:30,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1916 treesize of output 1906 [2023-12-02 18:35:30,870 INFO L349 Elim1Store]: treesize reduction 64, result has 61.2 percent of original size [2023-12-02 18:35:30,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 1906 treesize of output 2100 [2023-12-02 18:35:31,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1863 treesize of output 1861 [2023-12-02 18:35:31,640 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:35:31,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 1861 treesize of output 1865 [2023-12-02 18:35:31,969 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:35:31,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 1852 treesize of output 1856 [2023-12-02 18:35:32,294 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:35:32,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 1843 treesize of output 1847 [2023-12-02 18:35:32,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1834 treesize of output 1832 [2023-12-02 18:35:33,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1832 treesize of output 1830 [2023-12-02 18:35:33,378 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:35:33,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 1830 treesize of output 1834 [2023-12-02 18:43:27,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2023-12-02 18:43:27,389 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2023-12-02 18:43:27,390 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2023-12-02 18:43:27,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1799846488] [2023-12-02 18:43:27,392 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2023-12-02 18:43:27,392 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:43:27,393 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:43:27,393 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:43:27,393 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:43:27,401 FATAL L? ?]: Ignoring exception! de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:177) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:132) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.checkSatTerm(SmtUtils.java:332) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.isFalse(SymbolicTools.java:223) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.RelationCheckUtil.isEqBottom_SolverAlphaSolver(RelationCheckUtil.java:56) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.ExplicitValueDomain.isEqBottom(ExplicitValueDomain.java:73) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.CompoundDomain.isEqBottom(CompoundDomain.java:84) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StatsWrapperDomain.isEqBottom(StatsWrapperDomain.java:69) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.earlyExitAfterStep(DagInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:175) ... 44 more [2023-12-02 18:43:27,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:43:27,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2023-12-02 18:43:27,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627244857] [2023-12-02 18:43:27,404 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 18:43:27,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-02 18:43:27,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:43:27,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-02 18:43:27,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2232, Unknown=79, NotChecked=194, Total=2652 [2023-12-02 18:43:27,406 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 24 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:43:27,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=147, Invalid=2232, Unknown=79, NotChecked=194, Total=2652 [2023-12-02 18:43:27,407 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:43:27,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:43:27,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-02 18:43:27,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-12-02 18:43:27,609 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:177) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:138) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertCodeBlock(IncrementalHoareTripleChecker.java:436) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:278) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:284) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.releaseLock(ChainingHoareTripleChecker.java:449) at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1655) at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:658) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.releaseLock(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:159) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:365) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:325) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:175) ... 36 more [2023-12-02 18:43:27,611 INFO L158 Benchmark]: Toolchain (without parser) took 610907.77ms. Allocated memory was 155.2MB in the beginning and 1.1GB in the end (delta: 933.2MB). Free memory was 107.0MB in the beginning and 568.4MB in the end (delta: -461.4MB). Peak memory consumption was 473.5MB. Max. memory is 16.1GB. [2023-12-02 18:43:27,611 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 155.2MB. Free memory is still 127.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 18:43:27,611 INFO L158 Benchmark]: CACSL2BoogieTranslator took 424.00ms. Allocated memory is still 155.2MB. Free memory was 106.7MB in the beginning and 89.0MB in the end (delta: 17.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-12-02 18:43:27,611 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.97ms. Allocated memory is still 155.2MB. Free memory was 89.0MB in the beginning and 86.9MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 18:43:27,611 INFO L158 Benchmark]: Boogie Preprocessor took 36.26ms. Allocated memory is still 155.2MB. Free memory was 86.9MB in the beginning and 84.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 18:43:27,611 INFO L158 Benchmark]: RCFGBuilder took 470.69ms. Allocated memory is still 155.2MB. Free memory was 84.8MB in the beginning and 60.2MB in the end (delta: 24.6MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2023-12-02 18:43:27,612 INFO L158 Benchmark]: TraceAbstraction took 609920.83ms. Allocated memory was 155.2MB in the beginning and 1.1GB in the end (delta: 933.2MB). Free memory was 59.7MB in the beginning and 568.4MB in the end (delta: -508.7MB). Peak memory consumption was 427.3MB. Max. memory is 16.1GB. [2023-12-02 18:43:27,612 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 155.2MB. Free memory is still 127.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 424.00ms. Allocated memory is still 155.2MB. Free memory was 106.7MB in the beginning and 89.0MB in the end (delta: 17.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.97ms. Allocated memory is still 155.2MB. Free memory was 89.0MB in the beginning and 86.9MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 36.26ms. Allocated memory is still 155.2MB. Free memory was 86.9MB in the beginning and 84.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 470.69ms. Allocated memory is still 155.2MB. Free memory was 84.8MB in the beginning and 60.2MB in the end (delta: 24.6MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 609920.83ms. Allocated memory was 155.2MB in the beginning and 1.1GB in the end (delta: 933.2MB). Free memory was 59.7MB in the beginning and 568.4MB in the end (delta: -508.7MB). Peak memory consumption was 427.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2c_update_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e86102617f1813255879beda7bab492587801800e6506c4c5cd56fb9179f8713 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 18:43:29,484 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 18:43:29,567 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2023-12-02 18:43:29,573 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 18:43:29,574 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 18:43:29,604 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 18:43:29,604 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 18:43:29,605 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 18:43:29,606 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 18:43:29,606 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 18:43:29,607 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 18:43:29,608 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 18:43:29,608 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 18:43:29,609 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 18:43:29,609 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 18:43:29,610 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 18:43:29,611 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 18:43:29,612 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 18:43:29,612 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 18:43:29,613 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 18:43:29,613 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 18:43:29,614 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 18:43:29,615 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 18:43:29,615 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 18:43:29,616 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 18:43:29,616 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 18:43:29,616 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 18:43:29,617 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 18:43:29,617 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-02 18:43:29,618 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-02 18:43:29,618 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 18:43:29,619 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 18:43:29,619 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 18:43:29,619 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 18:43:29,619 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-02 18:43:29,620 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 18:43:29,620 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 18:43:29,620 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:43:29,621 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 18:43:29,621 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 18:43:29,621 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-12-02 18:43:29,621 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-02 18:43:29,622 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 18:43:29,622 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 18:43:29,622 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 18:43:29,622 INFO L153 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e86102617f1813255879beda7bab492587801800e6506c4c5cd56fb9179f8713 [2023-12-02 18:43:29,937 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 18:43:29,958 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 18:43:29,960 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 18:43:29,962 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 18:43:29,962 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 18:43:29,964 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/list-simple/sll2c_update_all.i [2023-12-02 18:43:32,875 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 18:43:33,146 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 18:43:33,147 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/sv-benchmarks/c/list-simple/sll2c_update_all.i [2023-12-02 18:43:33,163 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/data/b07f105a2/368a32d0e0b14788bb4b2b829efbc1d5/FLAG54e02c376 [2023-12-02 18:43:33,179 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/data/b07f105a2/368a32d0e0b14788bb4b2b829efbc1d5 [2023-12-02 18:43:33,182 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 18:43:33,184 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 18:43:33,186 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 18:43:33,186 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 18:43:33,192 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 18:43:33,193 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:43:33" (1/1) ... [2023-12-02 18:43:33,194 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@708a5e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:43:33, skipping insertion in model container [2023-12-02 18:43:33,195 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:43:33" (1/1) ... [2023-12-02 18:43:33,249 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 18:43:33,582 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:43:33,597 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 18:43:33,642 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:43:33,680 INFO L206 MainTranslator]: Completed translation [2023-12-02 18:43:33,681 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:43:33 WrapperNode [2023-12-02 18:43:33,681 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 18:43:33,682 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 18:43:33,683 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 18:43:33,683 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 18:43:33,691 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:43:33" (1/1) ... [2023-12-02 18:43:33,713 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:43:33" (1/1) ... [2023-12-02 18:43:33,744 INFO L138 Inliner]: procedures = 129, calls = 27, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 140 [2023-12-02 18:43:33,745 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 18:43:33,746 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 18:43:33,746 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 18:43:33,746 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 18:43:33,757 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:43:33" (1/1) ... [2023-12-02 18:43:33,758 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:43:33" (1/1) ... [2023-12-02 18:43:33,763 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:43:33" (1/1) ... [2023-12-02 18:43:33,763 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:43:33" (1/1) ... [2023-12-02 18:43:33,775 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:43:33" (1/1) ... [2023-12-02 18:43:33,780 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:43:33" (1/1) ... [2023-12-02 18:43:33,783 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:43:33" (1/1) ... [2023-12-02 18:43:33,786 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:43:33" (1/1) ... [2023-12-02 18:43:33,790 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 18:43:33,792 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 18:43:33,792 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 18:43:33,806 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 18:43:33,807 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:43:33" (1/1) ... [2023-12-02 18:43:33,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:43:33,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:43:33,866 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 18:43:33,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 18:43:33,907 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-12-02 18:43:33,907 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-12-02 18:43:33,907 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-12-02 18:43:33,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 18:43:33,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 18:43:33,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 18:43:33,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 18:43:33,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 18:43:33,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-12-02 18:43:33,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-12-02 18:43:33,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 18:43:33,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 18:43:34,051 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 18:43:34,053 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 18:43:34,447 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 18:43:34,505 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 18:43:34,506 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-12-02 18:43:34,506 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:43:34 BoogieIcfgContainer [2023-12-02 18:43:34,506 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 18:43:34,509 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 18:43:34,509 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 18:43:34,513 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 18:43:34,514 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 06:43:33" (1/3) ... [2023-12-02 18:43:34,514 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b9cd02d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:43:34, skipping insertion in model container [2023-12-02 18:43:34,515 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:43:33" (2/3) ... [2023-12-02 18:43:34,515 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b9cd02d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:43:34, skipping insertion in model container [2023-12-02 18:43:34,515 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:43:34" (3/3) ... [2023-12-02 18:43:34,517 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2c_update_all.i [2023-12-02 18:43:34,540 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 18:43:34,540 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2023-12-02 18:43:34,590 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 18:43:34,598 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;@1bf2ff01, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 18:43:34,598 INFO L358 AbstractCegarLoop]: Starting to check reachability of 28 error locations. [2023-12-02 18:43:34,603 INFO L276 IsEmpty]: Start isEmpty. Operand has 69 states, 37 states have (on average 2.189189189189189) internal successors, (81), 65 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:43:34,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 18:43:34,610 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:43:34,610 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 18:43:34,611 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:43:34,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:43:34,617 INFO L85 PathProgramCache]: Analyzing trace with hash 209499439, now seen corresponding path program 1 times [2023-12-02 18:43:34,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:43:34,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1101013411] [2023-12-02 18:43:34,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:34,631 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:43:34,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:43:34,634 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 18:43:34,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-12-02 18:43:34,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:34,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 18:43:34,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:43:34,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:43:34,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:43:34,823 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:43:34,824 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:43:34,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1101013411] [2023-12-02 18:43:34,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1101013411] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:43:34,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:43:34,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 18:43:34,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179874041] [2023-12-02 18:43:34,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:43:34,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:43:34,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:43:34,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:43:34,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:43:34,867 INFO L87 Difference]: Start difference. First operand has 69 states, 37 states have (on average 2.189189189189189) internal successors, (81), 65 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) 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) [2023-12-02 18:43:35,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:43:35,073 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2023-12-02 18:43:35,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:43:35,077 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 [2023-12-02 18:43:35,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:43:35,086 INFO L225 Difference]: With dead ends: 66 [2023-12-02 18:43:35,086 INFO L226 Difference]: Without dead ends: 64 [2023-12-02 18:43:35,088 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 [2023-12-02 18:43:35,092 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 6 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:43:35,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 95 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:43:35,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-12-02 18:43:35,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2023-12-02 18:43:35,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 60 states have internal predecessors, (67), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:43:35,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2023-12-02 18:43:35,135 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 5 [2023-12-02 18:43:35,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:43:35,136 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2023-12-02 18:43:35,136 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) [2023-12-02 18:43:35,136 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2023-12-02 18:43:35,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 18:43:35,137 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:43:35,137 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 18:43:35,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-12-02 18:43:35,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:43:35,340 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:43:35,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:43:35,341 INFO L85 PathProgramCache]: Analyzing trace with hash 209499440, now seen corresponding path program 1 times [2023-12-02 18:43:35,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:43:35,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [212343026] [2023-12-02 18:43:35,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:35,342 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:43:35,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:43:35,344 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 18:43:35,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-12-02 18:43:35,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:35,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:43:35,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:43:35,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:43:35,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:43:35,437 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:43:35,437 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:43:35,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [212343026] [2023-12-02 18:43:35,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [212343026] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:43:35,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:43:35,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 18:43:35,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571062863] [2023-12-02 18:43:35,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:43:35,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:43:35,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:43:35,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:43:35,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:43:35,441 INFO L87 Difference]: Start difference. First operand 64 states and 71 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) [2023-12-02 18:43:35,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:43:35,603 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2023-12-02 18:43:35,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:43:35,604 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 [2023-12-02 18:43:35,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:43:35,606 INFO L225 Difference]: With dead ends: 62 [2023-12-02 18:43:35,606 INFO L226 Difference]: Without dead ends: 62 [2023-12-02 18:43:35,606 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 [2023-12-02 18:43:35,608 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 2 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:43:35,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 99 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:43:35,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-12-02 18:43:35,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-12-02 18:43:35,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 58 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:43:35,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2023-12-02 18:43:35,617 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 5 [2023-12-02 18:43:35,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:43:35,618 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2023-12-02 18:43:35,618 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) [2023-12-02 18:43:35,618 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2023-12-02 18:43:35,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 18:43:35,619 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:43:35,619 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:43:35,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-12-02 18:43:35,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:43:35,821 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:43:35,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:43:35,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1748640650, now seen corresponding path program 1 times [2023-12-02 18:43:35,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:43:35,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [484683574] [2023-12-02 18:43:35,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:35,823 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:43:35,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:43:35,825 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 18:43:35,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-12-02 18:43:35,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:35,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:43:35,929 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:43:35,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:43:35,947 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:43:35,947 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:43:35,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [484683574] [2023-12-02 18:43:35,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [484683574] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:43:35,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:43:35,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:43:35,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107310871] [2023-12-02 18:43:35,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:43:35,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:43:35,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:43:35,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:43:35,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:43:35,951 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 18:43:36,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:43:36,058 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2023-12-02 18:43:36,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:43:36,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-12-02 18:43:36,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:43:36,060 INFO L225 Difference]: With dead ends: 68 [2023-12-02 18:43:36,061 INFO L226 Difference]: Without dead ends: 68 [2023-12-02 18:43:36,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:43:36,062 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 4 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:43:36,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 109 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:43:36,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-12-02 18:43:36,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2023-12-02 18:43:36,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 59 states have internal predecessors, (66), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:43:36,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2023-12-02 18:43:36,072 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 10 [2023-12-02 18:43:36,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:43:36,073 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2023-12-02 18:43:36,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 18:43:36,073 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2023-12-02 18:43:36,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 18:43:36,074 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:43:36,074 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:43:36,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-12-02 18:43:36,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:43:36,275 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:43:36,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:43:36,276 INFO L85 PathProgramCache]: Analyzing trace with hash 420391556, now seen corresponding path program 1 times [2023-12-02 18:43:36,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:43:36,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [761185513] [2023-12-02 18:43:36,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:36,277 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:43:36,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:43:36,278 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 18:43:36,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-12-02 18:43:36,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:36,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 18:43:36,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:43:36,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:43:36,463 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 18:43:36,463 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:43:36,464 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:43:36,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [761185513] [2023-12-02 18:43:36,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [761185513] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:43:36,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:43:36,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 18:43:36,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620904841] [2023-12-02 18:43:36,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:43:36,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 18:43:36,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:43:36,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 18:43:36,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:43:36,466 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:43:36,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:43:36,792 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2023-12-02 18:43:36,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 18:43:36,793 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-12-02 18:43:36,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:43:36,794 INFO L225 Difference]: With dead ends: 62 [2023-12-02 18:43:36,794 INFO L226 Difference]: Without dead ends: 62 [2023-12-02 18:43:36,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:43:36,795 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 2 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:43:36,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 200 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 18:43:36,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-12-02 18:43:36,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-12-02 18:43:36,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 58 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:43:36,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2023-12-02 18:43:36,803 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 17 [2023-12-02 18:43:36,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:43:36,803 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2023-12-02 18:43:36,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:43:36,804 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2023-12-02 18:43:36,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 18:43:36,804 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:43:36,805 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:43:36,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-12-02 18:43:37,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:43:37,006 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:43:37,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:43:37,007 INFO L85 PathProgramCache]: Analyzing trace with hash 420391557, now seen corresponding path program 1 times [2023-12-02 18:43:37,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:43:37,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1154404038] [2023-12-02 18:43:37,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:37,007 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:43:37,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:43:37,009 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 18:43:37,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-12-02 18:43:37,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:37,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 18:43:37,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:43:37,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:43:37,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 18:43:37,218 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:43:37,218 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:43:37,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1154404038] [2023-12-02 18:43:37,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1154404038] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:43:37,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:43:37,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 18:43:37,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177439094] [2023-12-02 18:43:37,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:43:37,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 18:43:37,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:43:37,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 18:43:37,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:43:37,221 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:43:37,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:43:37,525 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2023-12-02 18:43:37,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 18:43:37,526 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-12-02 18:43:37,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:43:37,527 INFO L225 Difference]: With dead ends: 61 [2023-12-02 18:43:37,527 INFO L226 Difference]: Without dead ends: 61 [2023-12-02 18:43:37,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:43:37,529 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 1 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:43:37,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 220 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 18:43:37,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-12-02 18:43:37,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-12-02 18:43:37,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 57 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:43:37,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2023-12-02 18:43:37,536 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 17 [2023-12-02 18:43:37,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:43:37,537 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2023-12-02 18:43:37,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:43:37,537 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2023-12-02 18:43:37,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 18:43:37,538 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:43:37,538 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:43:37,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-12-02 18:43:37,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:43:37,739 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:43:37,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:43:37,739 INFO L85 PathProgramCache]: Analyzing trace with hash 269529954, now seen corresponding path program 1 times [2023-12-02 18:43:37,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:43:37,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [524135706] [2023-12-02 18:43:37,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:37,740 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:43:37,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:43:37,742 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 18:43:37,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-12-02 18:43:37,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:37,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 18:43:37,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:43:37,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:43:37,972 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| (_ BitVec 32))) (and (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (= (_ bv0 1) (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-12-02 18:43:38,045 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 18:43:38,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 18:43:38,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2023-12-02 18:43:38,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:43:38,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 18:43:38,307 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:43:38,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [524135706] [2023-12-02 18:43:38,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [524135706] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:43:38,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [346253811] [2023-12-02 18:43:38,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:38,308 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:43:38,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:43:38,314 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:43:38,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2023-12-02 18:43:38,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:38,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 18:43:38,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:43:38,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:43:38,662 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-02 18:43:38,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-12-02 18:43:38,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 18:43:38,723 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:43:38,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [346253811] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:43:38,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 18:43:38,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 6] total 11 [2023-12-02 18:43:38,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949429625] [2023-12-02 18:43:38,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:43:38,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 18:43:38,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:43:38,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 18:43:38,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=86, Unknown=1, NotChecked=18, Total=132 [2023-12-02 18:43:38,726 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand has 10 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:43:39,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:43:39,145 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2023-12-02 18:43:39,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 18:43:39,145 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2023-12-02 18:43:39,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:43:39,146 INFO L225 Difference]: With dead ends: 60 [2023-12-02 18:43:39,146 INFO L226 Difference]: Without dead ends: 60 [2023-12-02 18:43:39,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=101, Unknown=1, NotChecked=20, Total=156 [2023-12-02 18:43:39,147 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 3 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:43:39,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 248 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 18:43:39,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-12-02 18:43:39,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-12-02 18:43:39,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 36 states have (on average 1.75) internal successors, (63), 56 states have internal predecessors, (63), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:43:39,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2023-12-02 18:43:39,153 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 19 [2023-12-02 18:43:39,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:43:39,154 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2023-12-02 18:43:39,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:43:39,154 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2023-12-02 18:43:39,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 18:43:39,155 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:43:39,155 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:43:39,158 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2023-12-02 18:43:39,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-12-02 18:43:39,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:43:39,558 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:43:39,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:43:39,558 INFO L85 PathProgramCache]: Analyzing trace with hash 269529955, now seen corresponding path program 1 times [2023-12-02 18:43:39,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:43:39,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1351407506] [2023-12-02 18:43:39,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:39,559 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:43:39,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:43:39,560 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 18:43:39,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-12-02 18:43:39,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:39,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 18:43:39,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:43:39,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:43:39,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:43:39,878 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| (_ BitVec 32))) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-12-02 18:43:39,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 18:43:39,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 18:43:39,951 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:43:39,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:43:39,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-12-02 18:43:39,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:43:40,241 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:43:40,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1351407506] [2023-12-02 18:43:40,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1351407506] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:43:40,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1743359046] [2023-12-02 18:43:40,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:40,242 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:43:40,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:43:40,243 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:43:40,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2023-12-02 18:43:40,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:40,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 18:43:40,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:43:40,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:43:40,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:43:40,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 18:43:40,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 18:43:40,670 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:43:40,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:43:40,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-12-02 18:43:40,696 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:43:42,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1743359046] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:43:42,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958377732] [2023-12-02 18:43:42,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:42,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:43:42,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:43:42,922 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:43:42,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 18:43:43,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:43,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 18:43:43,018 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:43:43,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:43:43,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:43:43,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 18:43:43,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 18:43:43,189 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:43:43,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:43:43,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-12-02 18:43:43,212 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:43:45,339 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_sll_circular_create_~last~0#1.offset|))) (and (forall ((|v_node_create_~temp~0#1.base_31| (_ BitVec 32))) (or (forall ((v_ArrVal_274 (_ BitVec 32))) (bvule .cse0 (select (store |c_#length| |v_node_create_~temp~0#1.base_31| v_ArrVal_274) |c_ULTIMATE.start_sll_circular_create_~last~0#1.base|))) (not (= (_ bv0 1) (select |c_#valid| |v_node_create_~temp~0#1.base_31|))))) (or (bvule |c_ULTIMATE.start_sll_circular_create_~last~0#1.offset| .cse0) (forall ((|v_node_create_~temp~0#1.base_31| (_ BitVec 32))) (not (= (_ bv0 1) (select |c_#valid| |v_node_create_~temp~0#1.base_31|))))))) is different from false [2023-12-02 18:43:45,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958377732] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:43:45,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:43:45,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2023-12-02 18:43:45,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229201790] [2023-12-02 18:43:45,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:43:45,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 18:43:45,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:43:45,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 18:43:45,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=71, Unknown=2, NotChecked=34, Total=132 [2023-12-02 18:43:45,346 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:43:45,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:43:45,856 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2023-12-02 18:43:45,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 18:43:45,856 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2023-12-02 18:43:45,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:43:45,858 INFO L225 Difference]: With dead ends: 66 [2023-12-02 18:43:45,858 INFO L226 Difference]: Without dead ends: 66 [2023-12-02 18:43:45,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=33, Invalid=105, Unknown=2, NotChecked=42, Total=182 [2023-12-02 18:43:45,859 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 2 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:43:45,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 207 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 185 Invalid, 0 Unknown, 72 Unchecked, 0.4s Time] [2023-12-02 18:43:45,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-12-02 18:43:45,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2023-12-02 18:43:45,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 40 states have (on average 1.7) internal successors, (68), 60 states have internal predecessors, (68), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 18:43:45,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 74 transitions. [2023-12-02 18:43:45,865 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 74 transitions. Word has length 19 [2023-12-02 18:43:45,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:43:45,865 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 74 transitions. [2023-12-02 18:43:45,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:43:45,865 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 74 transitions. [2023-12-02 18:43:45,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 18:43:45,866 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:43:45,866 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:43:45,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-12-02 18:43:46,073 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 18:43:46,269 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2023-12-02 18:43:46,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 18:43:46,468 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:43:46,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:43:46,468 INFO L85 PathProgramCache]: Analyzing trace with hash -2017091990, now seen corresponding path program 1 times [2023-12-02 18:43:46,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:43:46,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1674244997] [2023-12-02 18:43:46,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:46,469 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:43:46,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:43:46,470 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 18:43:46,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-12-02 18:43:46,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:46,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 18:43:46,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:43:46,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:43:46,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 18:43:46,661 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:43:46,661 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:43:46,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1674244997] [2023-12-02 18:43:46,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1674244997] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:43:46,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:43:46,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 18:43:46,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304701331] [2023-12-02 18:43:46,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:43:46,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 18:43:46,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:43:46,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 18:43:46,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:43:46,663 INFO L87 Difference]: Start difference. First operand 65 states and 74 transitions. Second operand has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:43:47,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:43:47,125 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2023-12-02 18:43:47,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 18:43:47,126 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2023-12-02 18:43:47,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:43:47,127 INFO L225 Difference]: With dead ends: 89 [2023-12-02 18:43:47,127 INFO L226 Difference]: Without dead ends: 89 [2023-12-02 18:43:47,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-12-02 18:43:47,128 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 60 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:43:47,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 251 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 18:43:47,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-12-02 18:43:47,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 68. [2023-12-02 18:43:47,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 63 states have internal predecessors, (74), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 18:43:47,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2023-12-02 18:43:47,135 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 22 [2023-12-02 18:43:47,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:43:47,135 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2023-12-02 18:43:47,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:43:47,135 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2023-12-02 18:43:47,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 18:43:47,136 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:43:47,136 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:43:47,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-12-02 18:43:47,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:43:47,337 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:43:47,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:43:47,337 INFO L85 PathProgramCache]: Analyzing trace with hash -2017091989, now seen corresponding path program 1 times [2023-12-02 18:43:47,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:43:47,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1151935425] [2023-12-02 18:43:47,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:47,338 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:43:47,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:43:47,339 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 18:43:47,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-12-02 18:43:47,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:47,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 18:43:47,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:43:47,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:43:47,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 18:43:47,615 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:43:47,615 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:43:47,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1151935425] [2023-12-02 18:43:47,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1151935425] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:43:47,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:43:47,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 18:43:47,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528742611] [2023-12-02 18:43:47,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:43:47,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 18:43:47,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:43:47,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 18:43:47,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:43:47,618 INFO L87 Difference]: Start difference. First operand 68 states and 80 transitions. Second operand has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:43:48,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:43:48,130 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2023-12-02 18:43:48,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 18:43:48,131 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2023-12-02 18:43:48,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:43:48,132 INFO L225 Difference]: With dead ends: 68 [2023-12-02 18:43:48,132 INFO L226 Difference]: Without dead ends: 68 [2023-12-02 18:43:48,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-12-02 18:43:48,133 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 58 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 18:43:48,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 279 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 18:43:48,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-12-02 18:43:48,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-12-02 18:43:48,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 43 states have (on average 1.6744186046511629) internal successors, (72), 63 states have internal predecessors, (72), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 18:43:48,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2023-12-02 18:43:48,139 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 22 [2023-12-02 18:43:48,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:43:48,139 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2023-12-02 18:43:48,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:43:48,140 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2023-12-02 18:43:48,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 18:43:48,140 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:43:48,141 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:43:48,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-12-02 18:43:48,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:43:48,341 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:43:48,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:43:48,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1396384217, now seen corresponding path program 1 times [2023-12-02 18:43:48,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:43:48,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1309678397] [2023-12-02 18:43:48,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:48,342 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:43:48,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:43:48,343 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 18:43:48,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-12-02 18:43:48,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:48,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 18:43:48,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:43:48,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:43:48,488 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:43:48,488 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:43:48,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1309678397] [2023-12-02 18:43:48,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1309678397] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:43:48,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:43:48,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:43:48,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266174302] [2023-12-02 18:43:48,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:43:48,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:43:48,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:43:48,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:43:48,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:43:48,490 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:43:48,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:43:48,636 INFO L93 Difference]: Finished difference Result 91 states and 104 transitions. [2023-12-02 18:43:48,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:43:48,637 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2023-12-02 18:43:48,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:43:48,638 INFO L225 Difference]: With dead ends: 91 [2023-12-02 18:43:48,638 INFO L226 Difference]: Without dead ends: 91 [2023-12-02 18:43:48,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:43:48,639 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 72 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:43:48,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 102 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:43:48,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-12-02 18:43:48,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 70. [2023-12-02 18:43:48,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 65 states have internal predecessors, (74), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 18:43:48,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2023-12-02 18:43:48,645 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 24 [2023-12-02 18:43:48,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:43:48,645 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2023-12-02 18:43:48,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:43:48,646 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2023-12-02 18:43:48,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 18:43:48,647 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:43:48,647 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:43:48,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2023-12-02 18:43:48,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:43:48,850 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:43:48,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:43:48,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1394965995, now seen corresponding path program 1 times [2023-12-02 18:43:48,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:43:48,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1587522869] [2023-12-02 18:43:48,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:48,851 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:43:48,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:43:48,852 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 18:43:48,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-12-02 18:43:48,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:48,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:43:48,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:43:48,983 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:43:48,984 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:43:48,984 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:43:48,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1587522869] [2023-12-02 18:43:48,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1587522869] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:43:48,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:43:48,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:43:48,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838593334] [2023-12-02 18:43:48,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:43:48,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:43:48,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:43:48,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:43:48,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:43:48,986 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:43:49,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:43:49,149 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2023-12-02 18:43:49,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:43:49,150 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2023-12-02 18:43:49,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:43:49,151 INFO L225 Difference]: With dead ends: 83 [2023-12-02 18:43:49,151 INFO L226 Difference]: Without dead ends: 83 [2023-12-02 18:43:49,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:43:49,151 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 15 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:43:49,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 150 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:43:49,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-02 18:43:49,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 71. [2023-12-02 18:43:49,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 46 states have (on average 1.6304347826086956) internal successors, (75), 66 states have internal predecessors, (75), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 18:43:49,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2023-12-02 18:43:49,155 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 24 [2023-12-02 18:43:49,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:43:49,156 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2023-12-02 18:43:49,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:43:49,156 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2023-12-02 18:43:49,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 18:43:49,157 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:43:49,157 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:43:49,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-12-02 18:43:49,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:43:49,357 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:43:49,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:43:49,358 INFO L85 PathProgramCache]: Analyzing trace with hash -968235333, now seen corresponding path program 1 times [2023-12-02 18:43:49,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:43:49,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [188624176] [2023-12-02 18:43:49,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:49,359 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:43:49,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:43:49,360 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 18:43:49,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-12-02 18:43:49,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:49,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:43:49,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:43:49,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:43:49,552 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:43:49,618 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:43:49,618 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:43:49,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [188624176] [2023-12-02 18:43:49,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [188624176] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:43:49,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1564759258] [2023-12-02 18:43:49,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:49,618 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:43:49,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:43:49,619 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:43:49,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2023-12-02 18:43:49,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:49,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:43:49,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:43:49,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:43:49,874 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:43:49,905 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:43:49,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1564759258] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:43:49,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920237882] [2023-12-02 18:43:49,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:49,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:43:49,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:43:49,906 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:43:49,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-02 18:43:50,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:50,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 18:43:50,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:43:50,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:43:50,166 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:43:50,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920237882] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:43:50,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2023-12-02 18:43:50,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 5, 5, 5] total 15 [2023-12-02 18:43:50,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767279780] [2023-12-02 18:43:50,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:43:50,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 18:43:50,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:43:50,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 18:43:50,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-12-02 18:43:50,168 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 9 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:43:50,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:43:50,707 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2023-12-02 18:43:50,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 18:43:50,707 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2023-12-02 18:43:50,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:43:50,708 INFO L225 Difference]: With dead ends: 95 [2023-12-02 18:43:50,709 INFO L226 Difference]: Without dead ends: 95 [2023-12-02 18:43:50,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-12-02 18:43:50,710 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 56 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 18:43:50,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 251 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 18:43:50,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-12-02 18:43:50,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 74. [2023-12-02 18:43:50,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 49 states have (on average 1.653061224489796) internal successors, (81), 69 states have internal predecessors, (81), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 18:43:50,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2023-12-02 18:43:50,714 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 27 [2023-12-02 18:43:50,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:43:50,714 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2023-12-02 18:43:50,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:43:50,714 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2023-12-02 18:43:50,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 18:43:50,715 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:43:50,715 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:43:50,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-02 18:43:50,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2023-12-02 18:43:51,119 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2023-12-02 18:43:51,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:43:51,316 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:43:51,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:43:51,316 INFO L85 PathProgramCache]: Analyzing trace with hash -968235332, now seen corresponding path program 1 times [2023-12-02 18:43:51,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:43:51,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [852500501] [2023-12-02 18:43:51,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:51,317 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:43:51,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:43:51,318 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 18:43:51,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-12-02 18:43:51,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:51,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:43:51,453 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:43:51,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:43:51,498 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:43:51,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:43:51,565 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:43:51,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [852500501] [2023-12-02 18:43:51,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [852500501] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:43:51,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1901557875] [2023-12-02 18:43:51,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:51,566 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:43:51,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:43:51,567 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:43:51,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2023-12-02 18:43:51,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:51,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:43:51,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:43:51,820 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:43:51,820 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:43:51,847 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:43:51,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1901557875] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:43:51,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000511950] [2023-12-02 18:43:51,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:51,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:43:51,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:43:51,849 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:43:51,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-02 18:43:51,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:51,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:43:51,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:43:51,978 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 18:43:51,978 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:43:51,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000511950] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:43:51,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2023-12-02 18:43:51,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5, 5, 5] total 10 [2023-12-02 18:43:51,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789770195] [2023-12-02 18:43:51,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:43:51,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:43:51,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:43:51,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:43:51,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-12-02 18:43:51,980 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:43:52,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:43:52,124 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2023-12-02 18:43:52,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:43:52,125 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2023-12-02 18:43:52,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:43:52,126 INFO L225 Difference]: With dead ends: 82 [2023-12-02 18:43:52,126 INFO L226 Difference]: Without dead ends: 82 [2023-12-02 18:43:52,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-12-02 18:43:52,127 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 11 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:43:52,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 150 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:43:52,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-12-02 18:43:52,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 75. [2023-12-02 18:43:52,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.64) internal successors, (82), 70 states have internal predecessors, (82), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 18:43:52,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2023-12-02 18:43:52,130 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 27 [2023-12-02 18:43:52,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:43:52,131 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2023-12-02 18:43:52,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:43:52,131 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2023-12-02 18:43:52,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 18:43:52,132 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:43:52,132 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:43:52,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-02 18:43:52,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2023-12-02 18:43:52,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2023-12-02 18:43:52,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:43:52,733 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:43:52,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:43:52,734 INFO L85 PathProgramCache]: Analyzing trace with hash -968235387, now seen corresponding path program 1 times [2023-12-02 18:43:52,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:43:52,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [898733760] [2023-12-02 18:43:52,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:52,735 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:43:52,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:43:52,736 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 18:43:52,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-12-02 18:43:52,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:52,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:43:52,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:43:52,911 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:43:52,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:43:52,976 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:43:52,977 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:43:52,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [898733760] [2023-12-02 18:43:52,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [898733760] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:43:52,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1561899636] [2023-12-02 18:43:52,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:52,977 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:43:52,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:43:52,978 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:43:52,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2023-12-02 18:43:53,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:53,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:43:53,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:43:53,237 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:43:53,238 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:43:53,267 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:43:53,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1561899636] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:43:53,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434965247] [2023-12-02 18:43:53,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:53,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:43:53,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:43:53,268 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:43:53,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-02 18:43:53,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:53,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:43:53,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:43:53,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:43:53,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:43:53,447 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:43:53,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434965247] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:43:53,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 18:43:53,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2023-12-02 18:43:53,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212805762] [2023-12-02 18:43:53,448 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 18:43:53,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 18:43:53,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:43:53,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 18:43:53,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-12-02 18:43:53,449 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 18:43:53,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:43:53,666 INFO L93 Difference]: Finished difference Result 108 states and 127 transitions. [2023-12-02 18:43:53,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 18:43:53,667 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2023-12-02 18:43:53,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:43:53,668 INFO L225 Difference]: With dead ends: 108 [2023-12-02 18:43:53,668 INFO L226 Difference]: Without dead ends: 108 [2023-12-02 18:43:53,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:43:53,669 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 211 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:43:53,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 201 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:43:53,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-12-02 18:43:53,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 80. [2023-12-02 18:43:53,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 55 states have (on average 1.6181818181818182) internal successors, (89), 75 states have internal predecessors, (89), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 18:43:53,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 95 transitions. [2023-12-02 18:43:53,673 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 95 transitions. Word has length 27 [2023-12-02 18:43:53,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:43:53,673 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 95 transitions. [2023-12-02 18:43:53,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 18:43:53,673 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 95 transitions. [2023-12-02 18:43:53,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 18:43:53,674 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:43:53,674 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:43:53,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2023-12-02 18:43:53,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2023-12-02 18:43:54,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-12-02 18:43:54,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:43:54,275 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:43:54,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:43:54,276 INFO L85 PathProgramCache]: Analyzing trace with hash -966817111, now seen corresponding path program 1 times [2023-12-02 18:43:54,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:43:54,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [843835971] [2023-12-02 18:43:54,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:54,276 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:43:54,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:43:54,277 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 18:43:54,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-12-02 18:43:54,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:54,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 39 conjunts are in the unsatisfiable core [2023-12-02 18:43:54,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:43:54,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:43:54,603 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:43:54,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:43:54,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:43:54,740 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:43:54,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2023-12-02 18:43:54,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2023-12-02 18:43:54,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-12-02 18:43:54,978 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 18:43:54,978 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:43:57,201 INFO L349 Elim1Store]: treesize reduction 7, result has 58.8 percent of original size [2023-12-02 18:43:57,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2023-12-02 18:43:57,210 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_899 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_899) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) is different from false [2023-12-02 18:43:57,227 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:43:57,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2023-12-02 18:43:57,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2023-12-02 18:43:57,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-12-02 18:43:57,527 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:43:57,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [843835971] [2023-12-02 18:43:57,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [843835971] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:43:57,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1838658475] [2023-12-02 18:43:57,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:57,527 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:43:57,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:43:57,528 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:43:57,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2023-12-02 18:43:57,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:57,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-02 18:43:57,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:43:57,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:43:58,112 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-12-02 18:43:58,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-12-02 18:43:58,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:43:58,493 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:43:58,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2023-12-02 18:43:58,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2023-12-02 18:43:58,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-12-02 18:43:59,041 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 18:43:59,041 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:44:01,329 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:44:01,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-12-02 18:44:01,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2023-12-02 18:44:01,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-12-02 18:44:06,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1838658475] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:44:06,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488003298] [2023-12-02 18:44:06,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:44:06,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:44:06,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:44:06,359 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:44:06,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-02 18:44:06,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:44:06,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-02 18:44:06,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:44:06,679 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:44:06,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:44:06,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:44:06,860 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:44:06,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2023-12-02 18:44:07,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2023-12-02 18:44:07,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-12-02 18:44:07,198 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 18:44:07,198 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:44:09,375 INFO L349 Elim1Store]: treesize reduction 7, result has 58.8 percent of original size [2023-12-02 18:44:09,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2023-12-02 18:44:09,382 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1002 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1002) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) is different from false [2023-12-02 18:44:09,395 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:44:09,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2023-12-02 18:44:09,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2023-12-02 18:44:09,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-12-02 18:44:09,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488003298] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:44:09,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:44:09,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2023-12-02 18:44:09,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637256550] [2023-12-02 18:44:09,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:44:09,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-02 18:44:09,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:44:09,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-02 18:44:09,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1489, Unknown=5, NotChecked=158, Total=1806 [2023-12-02 18:44:09,505 INFO L87 Difference]: Start difference. First operand 80 states and 95 transitions. Second operand has 33 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 18:44:11,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:44:11,542 INFO L93 Difference]: Finished difference Result 146 states and 174 transitions. [2023-12-02 18:44:11,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 18:44:11,542 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2023-12-02 18:44:11,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:44:11,544 INFO L225 Difference]: With dead ends: 146 [2023-12-02 18:44:11,544 INFO L226 Difference]: Without dead ends: 146 [2023-12-02 18:44:11,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 72 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=173, Invalid=1636, Unknown=5, NotChecked=166, Total=1980 [2023-12-02 18:44:11,545 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 168 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-12-02 18:44:11,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 749 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-12-02 18:44:11,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-12-02 18:44:11,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 91. [2023-12-02 18:44:11,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 66 states have (on average 1.5909090909090908) internal successors, (105), 86 states have internal predecessors, (105), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 18:44:11,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 111 transitions. [2023-12-02 18:44:11,550 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 111 transitions. Word has length 27 [2023-12-02 18:44:11,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:44:11,550 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 111 transitions. [2023-12-02 18:44:11,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 18:44:11,550 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 111 transitions. [2023-12-02 18:44:11,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 18:44:11,551 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:44:11,551 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:44:11,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-12-02 18:44:11,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2023-12-02 18:44:11,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2023-12-02 18:44:12,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:44:12,152 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:44:12,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:44:12,153 INFO L85 PathProgramCache]: Analyzing trace with hash -966817110, now seen corresponding path program 1 times [2023-12-02 18:44:12,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:44:12,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [195820848] [2023-12-02 18:44:12,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:44:12,153 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:44:12,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:44:12,154 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 18:44:12,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-12-02 18:44:12,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:44:12,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 53 conjunts are in the unsatisfiable core [2023-12-02 18:44:12,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:44:12,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:44:12,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:44:12,686 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 18:44:12,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-12-02 18:44:12,717 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:44:12,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:44:12,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:44:12,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:44:12,965 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:44:12,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2023-12-02 18:44:12,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-12-02 18:44:13,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2023-12-02 18:44:13,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-02 18:44:13,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-12-02 18:44:13,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-02 18:44:13,394 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 18:44:13,395 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:44:13,863 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|)) (.cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset|))) (and (forall ((v_ArrVal_1060 (Array (_ BitVec 32) (_ BitVec 32)))) (or (forall ((v_ArrVal_1061 (_ BitVec 32))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_1060) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|) .cse0 v_ArrVal_1061)) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)))) (not (= (store .cse1 .cse0 (select v_ArrVal_1060 .cse0)) v_ArrVal_1060)))) (forall ((v_ArrVal_1060 (Array (_ BitVec 32) (_ BitVec 32)))) (or (let ((.cse2 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_1060) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (bvule (bvadd (_ bv4 32) .cse2) (bvadd (_ bv8 32) .cse2))) (not (= (store .cse1 .cse0 (select v_ArrVal_1060 .cse0)) v_ArrVal_1060)))))) is different from false [2023-12-02 18:44:13,965 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1057 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1058 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1057) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1058) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)))) (forall ((v_ArrVal_1057 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1057) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0))))) is different from false [2023-12-02 18:44:13,996 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:44:13,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2023-12-02 18:44:14,007 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:44:14,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-12-02 18:44:14,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 44 [2023-12-02 18:44:14,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 70 [2023-12-02 18:44:14,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2023-12-02 18:44:14,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-12-02 18:44:14,065 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:44:14,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 30 [2023-12-02 18:44:14,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2023-12-02 18:44:14,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:44:14,810 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:44:14,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [195820848] [2023-12-02 18:44:14,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [195820848] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:44:14,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [366056840] [2023-12-02 18:44:14,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:44:14,811 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:44:14,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:44:14,812 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:44:14,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2023-12-02 18:44:15,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:44:15,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 53 conjunts are in the unsatisfiable core [2023-12-02 18:44:15,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:44:15,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:44:15,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:44:15,306 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:44:15,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:44:15,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 18:44:15,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:44:15,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:44:15,441 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:44:15,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2023-12-02 18:44:15,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-12-02 18:44:15,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2023-12-02 18:44:15,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-02 18:44:15,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-12-02 18:44:15,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-02 18:44:15,631 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 18:44:15,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:44:15,774 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|)) (.cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset|))) (and (forall ((v_ArrVal_1121 (Array (_ BitVec 32) (_ BitVec 32)))) (or (forall ((v_ArrVal_1119 (_ BitVec 32))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_1121) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|) .cse0 v_ArrVal_1119)) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)))) (not (= (store .cse1 .cse0 (select v_ArrVal_1121 .cse0)) v_ArrVal_1121)))) (forall ((v_ArrVal_1121 (Array (_ BitVec 32) (_ BitVec 32)))) (or (let ((.cse2 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_1121) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (bvule (bvadd (_ bv4 32) .cse2) (bvadd (_ bv8 32) .cse2))) (not (= (store .cse1 .cse0 (select v_ArrVal_1121 .cse0)) v_ArrVal_1121)))))) is different from false [2023-12-02 18:44:15,873 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1117 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1118 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1117) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1118) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)))) (forall ((v_ArrVal_1117 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1117) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0))))) is different from false [2023-12-02 18:44:15,906 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:44:15,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 30 [2023-12-02 18:44:15,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2023-12-02 18:44:15,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:44:15,940 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:44:15,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2023-12-02 18:44:15,955 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:44:15,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-12-02 18:44:15,959 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 18:44:15,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2023-12-02 18:44:15,968 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 18:44:15,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-12-02 18:44:16,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [366056840] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:44:16,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932618454] [2023-12-02 18:44:16,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:44:16,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:44:16,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:44:16,361 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:44:16,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-02 18:44:16,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:44:16,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 48 conjunts are in the unsatisfiable core [2023-12-02 18:44:16,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:44:16,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:44:16,914 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 18:44:16,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-12-02 18:44:16,940 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:44:16,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:44:17,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:44:17,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:44:17,344 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:44:17,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2023-12-02 18:44:17,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-12-02 18:44:17,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2023-12-02 18:44:17,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-12-02 18:44:17,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-12-02 18:44:17,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-02 18:44:17,783 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 18:44:17,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:44:17,923 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|)) (.cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset|))) (and (forall ((v_ArrVal_1179 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (store .cse0 .cse1 (select v_ArrVal_1179 .cse1)) v_ArrVal_1179)) (forall ((v_ArrVal_1180 (_ BitVec 32))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_1179) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|) .cse1 v_ArrVal_1180)) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)))))) (forall ((v_ArrVal_1179 (Array (_ BitVec 32) (_ BitVec 32)))) (or (let ((.cse2 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_1179) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (bvule (bvadd (_ bv4 32) .cse2) (bvadd (_ bv8 32) .cse2))) (not (= (store .cse0 .cse1 (select v_ArrVal_1179 .cse1)) v_ArrVal_1179)))))) is different from false [2023-12-02 18:44:18,031 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1177 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1176 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1176) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1177) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)))) (forall ((v_ArrVal_1176 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1176) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0))))) is different from false [2023-12-02 18:44:18,063 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:44:18,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2023-12-02 18:44:18,075 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:44:18,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-12-02 18:44:18,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 44 [2023-12-02 18:44:18,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 70 [2023-12-02 18:44:18,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2023-12-02 18:44:18,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-12-02 18:44:18,131 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:44:18,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 30 [2023-12-02 18:44:18,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2023-12-02 18:44:18,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932618454] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:44:18,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:44:18,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 24 [2023-12-02 18:44:18,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20707434] [2023-12-02 18:44:18,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:44:18,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-02 18:44:18,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:44:18,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-02 18:44:18,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=848, Unknown=6, NotChecked=378, Total=1332 [2023-12-02 18:44:18,518 INFO L87 Difference]: Start difference. First operand 91 states and 111 transitions. Second operand has 25 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 18:44:21,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:44:21,010 INFO L93 Difference]: Finished difference Result 153 states and 184 transitions. [2023-12-02 18:44:21,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 18:44:21,010 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-12-02 18:44:21,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:44:21,011 INFO L225 Difference]: With dead ends: 153 [2023-12-02 18:44:21,011 INFO L226 Difference]: Without dead ends: 153 [2023-12-02 18:44:21,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=123, Invalid=1017, Unknown=6, NotChecked=414, Total=1560 [2023-12-02 18:44:21,013 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 61 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:44:21,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 699 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-12-02 18:44:21,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-12-02 18:44:21,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 96. [2023-12-02 18:44:21,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 71 states have (on average 1.591549295774648) internal successors, (113), 91 states have internal predecessors, (113), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 18:44:21,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2023-12-02 18:44:21,017 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 27 [2023-12-02 18:44:21,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:44:21,018 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2023-12-02 18:44:21,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 18:44:21,018 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2023-12-02 18:44:21,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 18:44:21,019 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:44:21,019 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-12-02 18:44:21,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2023-12-02 18:44:21,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-12-02 18:44:21,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2023-12-02 18:44:21,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 18:44:21,620 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:44:21,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:44:21,620 INFO L85 PathProgramCache]: Analyzing trace with hash -481630729, now seen corresponding path program 2 times [2023-12-02 18:44:21,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:44:21,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1939315007] [2023-12-02 18:44:21,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 18:44:21,621 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:44:21,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:44:21,622 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 18:44:21,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2023-12-02 18:44:21,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 18:44:21,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:44:21,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 18:44:21,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:44:21,823 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 18:44:21,823 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:44:21,889 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 18:44:21,889 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:44:21,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1939315007] [2023-12-02 18:44:21,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1939315007] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:44:21,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1419270397] [2023-12-02 18:44:21,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 18:44:21,890 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:44:21,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:44:21,891 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:44:21,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2023-12-02 18:44:22,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 18:44:22,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:44:22,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 18:44:22,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:44:22,209 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 18:44:22,209 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:44:22,245 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 18:44:22,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1419270397] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:44:22,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631935836] [2023-12-02 18:44:22,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 18:44:22,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:44:22,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:44:22,247 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:44:22,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-12-02 18:44:22,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 18:44:22,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:44:22,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 18:44:22,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:44:22,506 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 18:44:22,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:44:22,542 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 18:44:22,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631935836] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:44:22,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 18:44:22,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2023-12-02 18:44:22,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048645083] [2023-12-02 18:44:22,543 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 18:44:22,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 18:44:22,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:44:22,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 18:44:22,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:44:22,545 INFO L87 Difference]: Start difference. First operand 96 states and 119 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-02 18:44:22,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:44:22,740 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2023-12-02 18:44:22,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:44:22,741 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 28 [2023-12-02 18:44:22,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:44:22,742 INFO L225 Difference]: With dead ends: 86 [2023-12-02 18:44:22,742 INFO L226 Difference]: Without dead ends: 86 [2023-12-02 18:44:22,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:44:22,743 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 2 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:44:22,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 194 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:44:22,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-12-02 18:44:22,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2023-12-02 18:44:22,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 63 states have (on average 1.619047619047619) internal successors, (102), 82 states have internal predecessors, (102), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:44:22,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2023-12-02 18:44:22,746 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 106 transitions. Word has length 28 [2023-12-02 18:44:22,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:44:22,747 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 106 transitions. [2023-12-02 18:44:22,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-02 18:44:22,747 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 106 transitions. [2023-12-02 18:44:22,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 18:44:22,748 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:44:22,748 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:44:22,751 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2023-12-02 18:44:22,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Ended with exit code 0 [2023-12-02 18:44:23,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-12-02 18:44:23,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:44:23,349 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:44:23,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:44:23,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1398121836, now seen corresponding path program 2 times [2023-12-02 18:44:23,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:44:23,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1000952577] [2023-12-02 18:44:23,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 18:44:23,350 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:44:23,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:44:23,351 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 18:44:23,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2023-12-02 18:44:23,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 18:44:23,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:44:23,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 18:44:23,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:44:23,548 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:44:23,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:44:23,636 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:44:23,636 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:44:23,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1000952577] [2023-12-02 18:44:23,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1000952577] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:44:23,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1124329109] [2023-12-02 18:44:23,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 18:44:23,637 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:44:23,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:44:23,638 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:44:23,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2023-12-02 18:44:23,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 18:44:23,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:44:23,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 18:44:23,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:44:23,959 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:44:23,959 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:44:23,983 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:44:23,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1124329109] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:44:23,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365067430] [2023-12-02 18:44:23,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 18:44:23,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:44:23,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:44:23,984 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:44:23,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-12-02 18:44:24,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 18:44:24,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:44:24,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 18:44:24,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:44:24,534 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:44:24,534 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:44:24,808 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:44:24,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365067430] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:44:24,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 18:44:24,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 8] total 16 [2023-12-02 18:44:24,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918800468] [2023-12-02 18:44:24,809 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 18:44:24,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 18:44:24,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:44:24,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 18:44:24,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-12-02 18:44:24,810 INFO L87 Difference]: Start difference. First operand 86 states and 106 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:44:26,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:44:26,186 INFO L93 Difference]: Finished difference Result 219 states and 263 transitions. [2023-12-02 18:44:26,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-02 18:44:26,187 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2023-12-02 18:44:26,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:44:26,188 INFO L225 Difference]: With dead ends: 219 [2023-12-02 18:44:26,188 INFO L226 Difference]: Without dead ends: 219 [2023-12-02 18:44:26,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2023-12-02 18:44:26,189 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 203 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 18:44:26,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 624 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 18:44:26,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-12-02 18:44:26,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 105. [2023-12-02 18:44:26,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 82 states have (on average 1.646341463414634) internal successors, (135), 101 states have internal predecessors, (135), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:44:26,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 139 transitions. [2023-12-02 18:44:26,194 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 139 transitions. Word has length 29 [2023-12-02 18:44:26,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:44:26,194 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 139 transitions. [2023-12-02 18:44:26,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:44:26,195 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 139 transitions. [2023-12-02 18:44:26,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 18:44:26,195 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:44:26,195 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:44:26,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-12-02 18:44:26,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Ended with exit code 0 [2023-12-02 18:44:26,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2023-12-02 18:44:26,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 18:44:26,796 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:44:26,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:44:26,797 INFO L85 PathProgramCache]: Analyzing trace with hash -494614106, now seen corresponding path program 1 times [2023-12-02 18:44:26,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:44:26,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1368518790] [2023-12-02 18:44:26,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:44:26,797 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:44:26,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:44:26,799 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 18:44:26,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2023-12-02 18:44:26,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:44:26,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 18:44:27,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:44:27,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:44:27,288 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:44:27,288 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:44:27,288 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:44:27,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1368518790] [2023-12-02 18:44:27,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1368518790] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:44:27,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:44:27,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 18:44:27,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641675416] [2023-12-02 18:44:27,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:44:27,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 18:44:27,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:44:27,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 18:44:27,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:44:27,290 INFO L87 Difference]: Start difference. First operand 105 states and 139 transitions. Second operand has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:44:27,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:44:27,954 INFO L93 Difference]: Finished difference Result 105 states and 136 transitions. [2023-12-02 18:44:27,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 18:44:27,955 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2023-12-02 18:44:27,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:44:27,956 INFO L225 Difference]: With dead ends: 105 [2023-12-02 18:44:27,956 INFO L226 Difference]: Without dead ends: 105 [2023-12-02 18:44:27,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-12-02 18:44:27,957 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 49 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 18:44:27,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 270 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 18:44:27,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-12-02 18:44:27,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2023-12-02 18:44:27,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 82 states have (on average 1.6097560975609757) internal successors, (132), 101 states have internal predecessors, (132), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:44:27,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 136 transitions. [2023-12-02 18:44:27,961 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 136 transitions. Word has length 32 [2023-12-02 18:44:27,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:44:27,962 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 136 transitions. [2023-12-02 18:44:27,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:44:27,962 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 136 transitions. [2023-12-02 18:44:27,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 18:44:27,962 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:44:27,962 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:44:27,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Ended with exit code 0 [2023-12-02 18:44:28,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:44:28,163 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:44:28,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:44:28,163 INFO L85 PathProgramCache]: Analyzing trace with hash -493195775, now seen corresponding path program 1 times [2023-12-02 18:44:28,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:44:28,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [228360109] [2023-12-02 18:44:28,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:44:28,164 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:44:28,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:44:28,165 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 18:44:28,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2023-12-02 18:44:28,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:44:28,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 18:44:28,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:44:28,481 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 18:44:28,481 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:44:28,662 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 18:44:28,662 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:44:28,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [228360109] [2023-12-02 18:44:28,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [228360109] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:44:28,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [821120236] [2023-12-02 18:44:28,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:44:28,663 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:44:28,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:44:28,664 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:44:28,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2023-12-02 18:44:28,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:44:28,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 18:44:28,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:44:29,062 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 18:44:29,063 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:44:29,134 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 18:44:29,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [821120236] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:44:29,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113508581] [2023-12-02 18:44:29,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:44:29,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:44:29,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:44:29,135 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:44:29,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-12-02 18:44:29,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:44:29,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 18:44:29,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:44:29,383 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:44:29,384 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:44:29,764 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 18:44:29,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113508581] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:44:29,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 18:44:29,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 7, 9] total 17 [2023-12-02 18:44:29,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856497779] [2023-12-02 18:44:29,764 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 18:44:29,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 18:44:29,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:44:29,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 18:44:29,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2023-12-02 18:44:29,766 INFO L87 Difference]: Start difference. First operand 105 states and 136 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 18:44:30,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:44:30,112 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2023-12-02 18:44:30,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 18:44:30,113 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-12-02 18:44:30,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:44:30,113 INFO L225 Difference]: With dead ends: 71 [2023-12-02 18:44:30,113 INFO L226 Difference]: Without dead ends: 71 [2023-12-02 18:44:30,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2023-12-02 18:44:30,114 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 174 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:44:30,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 202 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 18:44:30,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-12-02 18:44:30,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2023-12-02 18:44:30,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 64 states have internal predecessors, (69), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:44:30,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2023-12-02 18:44:30,117 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 32 [2023-12-02 18:44:30,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:44:30,117 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2023-12-02 18:44:30,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 18:44:30,117 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2023-12-02 18:44:30,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-02 18:44:30,117 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:44:30,117 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:44:30,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (39)] Ended with exit code 0 [2023-12-02 18:44:30,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-12-02 18:44:30,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Ended with exit code 0 [2023-12-02 18:44:30,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:44:30,718 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:44:30,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:44:30,719 INFO L85 PathProgramCache]: Analyzing trace with hash 987158934, now seen corresponding path program 1 times [2023-12-02 18:44:30,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:44:30,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [947347266] [2023-12-02 18:44:30,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:44:30,719 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:44:30,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:44:30,720 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 18:44:30,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2023-12-02 18:44:30,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:44:31,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 53 conjunts are in the unsatisfiable core [2023-12-02 18:44:31,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:44:31,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:44:31,163 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:44:31,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:44:31,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:44:31,381 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:44:31,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2023-12-02 18:44:31,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:44:31,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-12-02 18:44:31,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-12-02 18:44:31,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 18:44:32,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-02 18:44:32,133 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:44:32,133 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:44:32,428 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1751 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_1751) |c_ULTIMATE.start_main_~s~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~s~0#1.offset|)) |c_ULTIMATE.start_main_~len~0#1|)) is different from false [2023-12-02 18:44:32,447 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1751 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|) |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset|) v_ArrVal_1751) |c_ULTIMATE.start_main_~s~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~s~0#1.offset|)) |c_ULTIMATE.start_main_~len~0#1|)) is different from false [2023-12-02 18:44:32,469 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1751 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) v_ArrVal_1751) |c_ULTIMATE.start_main_~s~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~s~0#1.offset|)) |c_ULTIMATE.start_main_~len~0#1|)) is different from false [2023-12-02 18:44:32,484 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:44:32,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 37 [2023-12-02 18:44:32,513 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:44:32,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 63 [2023-12-02 18:44:32,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-12-02 18:44:32,968 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:44:32,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2023-12-02 18:44:32,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2023-12-02 18:44:32,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-12-02 18:44:33,919 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-12-02 18:44:33,919 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:44:33,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [947347266] [2023-12-02 18:44:33,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [947347266] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:44:33,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2144517356] [2023-12-02 18:44:33,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:44:33,919 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:44:33,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:44:33,920 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:44:33,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2023-12-02 18:44:34,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:44:34,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 54 conjunts are in the unsatisfiable core [2023-12-02 18:44:34,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:44:34,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:44:34,788 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:44:34,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:44:35,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:44:35,269 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:44:35,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2023-12-02 18:44:35,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-12-02 18:44:35,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:44:35,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-12-02 18:44:36,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 18:44:36,719 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:44:36,719 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:44:37,347 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1811 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~len~0#1| (select (select (store |c_#memory_int| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) v_ArrVal_1811) |c_ULTIMATE.start_main_~s~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~s~0#1.offset|)))) is different from false [2023-12-02 18:44:37,363 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:44:37,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 37 [2023-12-02 18:44:37,391 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:44:37,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 63 [2023-12-02 18:44:37,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-12-02 18:44:37,756 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:44:37,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2023-12-02 18:44:37,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2023-12-02 18:44:37,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-12-02 18:44:38,229 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-02 18:44:38,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2144517356] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:44:38,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325678015] [2023-12-02 18:44:38,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:44:38,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:44:38,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:44:38,231 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:44:38,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-12-02 18:44:38,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:44:38,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 53 conjunts are in the unsatisfiable core [2023-12-02 18:44:38,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:44:38,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:44:38,537 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:44:38,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:44:38,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:44:38,638 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:44:38,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2023-12-02 18:44:38,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-12-02 18:44:38,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:44:38,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-12-02 18:44:38,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 18:44:38,933 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:44:38,933 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:44:38,978 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1871 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_1871) |c_ULTIMATE.start_main_~s~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~s~0#1.offset|)) |c_ULTIMATE.start_main_~len~0#1|)) is different from false [2023-12-02 18:44:38,999 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1871 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~len~0#1| (select (select (store |c_#memory_int| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|) |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset|) v_ArrVal_1871) |c_ULTIMATE.start_main_~s~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~s~0#1.offset|)))) is different from false [2023-12-02 18:44:39,023 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1871 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) v_ArrVal_1871) |c_ULTIMATE.start_main_~s~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~s~0#1.offset|)) |c_ULTIMATE.start_main_~len~0#1|)) is different from false [2023-12-02 18:44:39,042 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:44:39,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 37 [2023-12-02 18:44:39,074 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:44:39,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 63 [2023-12-02 18:44:39,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-12-02 18:44:39,467 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:44:39,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2023-12-02 18:44:39,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2023-12-02 18:44:39,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-12-02 18:44:39,953 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-12-02 18:44:39,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325678015] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:44:39,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 18:44:39,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 22, 21, 22, 21] total 57 [2023-12-02 18:44:39,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027003394] [2023-12-02 18:44:39,954 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 18:44:39,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-12-02 18:44:39,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:44:39,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-12-02 18:44:39,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=2254, Unknown=39, NotChecked=714, Total=3192 [2023-12-02 18:44:39,956 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 57 states, 53 states have (on average 1.6415094339622642) internal successors, (87), 50 states have internal predecessors, (87), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 18:44:43,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:44:43,891 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2023-12-02 18:44:43,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 18:44:43,892 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 53 states have (on average 1.6415094339622642) internal successors, (87), 50 states have internal predecessors, (87), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 35 [2023-12-02 18:44:43,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:44:43,892 INFO L225 Difference]: With dead ends: 68 [2023-12-02 18:44:43,892 INFO L226 Difference]: Without dead ends: 68 [2023-12-02 18:44:43,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 138 SyntacticMatches, 13 SemanticMatches, 65 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=295, Invalid=3234, Unknown=39, NotChecked=854, Total=4422 [2023-12-02 18:44:43,895 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 154 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 1250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 451 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-12-02 18:44:43,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 1032 Invalid, 1250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 792 Invalid, 0 Unknown, 451 Unchecked, 2.6s Time] [2023-12-02 18:44:43,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-12-02 18:44:43,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-12-02 18:44:43,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 64 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:44:43,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2023-12-02 18:44:43,897 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 35 [2023-12-02 18:44:43,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:44:43,898 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2023-12-02 18:44:43,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 53 states have (on average 1.6415094339622642) internal successors, (87), 50 states have internal predecessors, (87), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 18:44:43,898 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2023-12-02 18:44:43,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-02 18:44:43,898 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:44:43,898 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:44:43,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Ended with exit code 0 [2023-12-02 18:44:44,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-12-02 18:44:44,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (42)] Ended with exit code 0 [2023-12-02 18:44:44,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 18:44:44,500 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:44:44,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:44:44,500 INFO L85 PathProgramCache]: Analyzing trace with hash 764464221, now seen corresponding path program 1 times [2023-12-02 18:44:44,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:44:44,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [262567153] [2023-12-02 18:44:44,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:44:44,501 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:44:44,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:44:44,502 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 18:44:44,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2023-12-02 18:44:44,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:44:44,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 18:44:44,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:44:44,770 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 18:44:44,770 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:44:44,890 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 18:44:44,890 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:44:44,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [262567153] [2023-12-02 18:44:44,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [262567153] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:44:44,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [459866670] [2023-12-02 18:44:44,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:44:44,891 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:44:44,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:44:44,892 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:44:44,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2023-12-02 18:44:45,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:44:45,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 18:44:45,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:44:45,288 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 18:44:45,288 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:44:45,320 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 18:44:45,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [459866670] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:44:45,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045860029] [2023-12-02 18:44:45,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:44:45,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:44:45,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:44:45,322 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:44:45,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-12-02 18:44:45,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:44:45,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 18:44:45,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:44:45,546 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 18:44:45,546 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:44:45,579 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 18:44:45,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045860029] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:44:45,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 18:44:45,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2023-12-02 18:44:45,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622950480] [2023-12-02 18:44:45,579 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 18:44:45,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 18:44:45,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:44:45,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 18:44:45,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-12-02 18:44:45,581 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:44:46,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:44:46,032 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2023-12-02 18:44:46,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 18:44:46,033 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2023-12-02 18:44:46,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:44:46,034 INFO L225 Difference]: With dead ends: 64 [2023-12-02 18:44:46,034 INFO L226 Difference]: Without dead ends: 64 [2023-12-02 18:44:46,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2023-12-02 18:44:46,035 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 24 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:44:46,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 281 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 18:44:46,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-12-02 18:44:46,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2023-12-02 18:44:46,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 47 states have (on average 1.3191489361702127) internal successors, (62), 60 states have internal predecessors, (62), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:44:46,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2023-12-02 18:44:46,039 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 38 [2023-12-02 18:44:46,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:44:46,040 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2023-12-02 18:44:46,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:44:46,040 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2023-12-02 18:44:46,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-02 18:44:46,041 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:44:46,041 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:44:46,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Ended with exit code 0 [2023-12-02 18:44:46,244 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 0 [2023-12-02 18:44:46,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-12-02 18:44:46,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:44:46,642 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:44:46,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:44:46,642 INFO L85 PathProgramCache]: Analyzing trace with hash 764464166, now seen corresponding path program 1 times [2023-12-02 18:44:46,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:44:46,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1709374613] [2023-12-02 18:44:46,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:44:46,643 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:44:46,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:44:46,644 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 18:44:46,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2023-12-02 18:44:47,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:44:47,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 72 conjunts are in the unsatisfiable core [2023-12-02 18:44:47,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:44:47,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:44:47,403 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:44:47,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:44:47,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:44:47,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:44:47,688 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:44:47,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 47 [2023-12-02 18:44:47,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-12-02 18:44:48,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2023-12-02 18:44:48,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-02 18:44:48,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:44:48,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-02 18:44:48,509 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:44:48,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2023-12-02 18:44:48,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-02 18:44:48,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-12-02 18:44:48,812 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 18:44:48,812 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:44:53,200 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2091 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) v_ArrVal_2091) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))))) is different from false [2023-12-02 18:44:53,228 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2089 (_ BitVec 32)) (v_ArrVal_2091 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset|) v_ArrVal_2089)))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) v_ArrVal_2091)) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) (_ bv1 1)))) is different from false [2023-12-02 18:44:53,414 INFO L349 Elim1Store]: treesize reduction 7, result has 82.5 percent of original size [2023-12-02 18:44:53,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2023-12-02 18:44:53,426 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2086 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2089 (_ BitVec 32)) (v_ArrVal_2091 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_2086))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|))) (store (store .cse0 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| (store .cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) v_ArrVal_2089)) (select .cse1 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) v_ArrVal_2091))) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) is different from false [2023-12-02 18:44:53,451 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:44:53,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 47 [2023-12-02 18:44:53,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2023-12-02 18:44:53,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 57 [2023-12-02 18:44:53,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2023-12-02 18:44:53,860 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:44:53,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1709374613] [2023-12-02 18:44:53,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1709374613] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:44:53,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [912907581] [2023-12-02 18:44:53,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:44:53,860 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:44:53,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:44:53,861 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:44:53,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2023-12-02 18:44:54,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:44:54,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 71 conjunts are in the unsatisfiable core [2023-12-02 18:44:54,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:44:54,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:44:54,807 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 18:44:54,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 18:44:55,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:44:55,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 18:44:55,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 18:44:55,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-02 18:44:56,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-02 18:44:56,453 INFO L349 Elim1Store]: treesize reduction 15, result has 37.5 percent of original size [2023-12-02 18:44:56,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 48 [2023-12-02 18:44:56,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2023-12-02 18:44:56,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-12-02 18:44:57,371 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:44:57,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 43 [2023-12-02 18:44:57,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-12-02 18:44:57,735 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:44:57,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:45:14,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2023-12-02 18:45:15,290 INFO L349 Elim1Store]: treesize reduction 17, result has 64.6 percent of original size [2023-12-02 18:45:15,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 116 treesize of output 118 [2023-12-02 18:45:15,311 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:45:15,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 141 [2023-12-02 18:45:15,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 70 [2023-12-02 18:45:16,259 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:45:16,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2023-12-02 18:45:16,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2023-12-02 18:45:16,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-12-02 18:45:17,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [912907581] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:45:17,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577633117] [2023-12-02 18:45:17,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:45:17,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:45:17,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:45:17,398 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:45:17,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-12-02 18:45:17,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:45:17,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 39 conjunts are in the unsatisfiable core [2023-12-02 18:45:17,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:45:18,309 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:45:18,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:45:18,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:45:18,527 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:45:18,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2023-12-02 18:45:18,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2023-12-02 18:45:19,079 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:45:19,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2023-12-02 18:45:19,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-12-02 18:45:19,271 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 18:45:19,271 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:45:21,477 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2213 (_ BitVec 32)) (v_ArrVal_2091 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset|) v_ArrVal_2213)))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) v_ArrVal_2091)) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) (_ bv1 1)))) is different from false [2023-12-02 18:45:21,847 INFO L349 Elim1Store]: treesize reduction 7, result has 82.5 percent of original size [2023-12-02 18:45:21,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2023-12-02 18:45:21,860 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2213 (_ BitVec 32)) (v_ArrVal_2211 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2091 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_2211))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|))) (store (store .cse0 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| (store .cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) v_ArrVal_2213)) (select .cse1 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) v_ArrVal_2091))) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_sll_circular_create_~last~0#1.base|)) is different from false [2023-12-02 18:45:21,879 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:45:21,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 47 [2023-12-02 18:45:21,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2023-12-02 18:45:21,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 57 [2023-12-02 18:45:21,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2023-12-02 18:45:22,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577633117] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:45:22,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:45:22,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24, 16] total 48 [2023-12-02 18:45:22,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338001399] [2023-12-02 18:45:22,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:45:22,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-12-02 18:45:22,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:45:22,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-12-02 18:45:22,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=4338, Unknown=48, NotChecked=690, Total=5402 [2023-12-02 18:45:22,075 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 49 states, 42 states have (on average 2.119047619047619) internal successors, (89), 43 states have internal predecessors, (89), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 18:45:27,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:45:27,297 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2023-12-02 18:45:27,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-02 18:45:27,298 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 42 states have (on average 2.119047619047619) internal successors, (89), 43 states have internal predecessors, (89), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 38 [2023-12-02 18:45:27,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:45:27,298 INFO L225 Difference]: With dead ends: 82 [2023-12-02 18:45:27,298 INFO L226 Difference]: Without dead ends: 82 [2023-12-02 18:45:27,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 108 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1992 ImplicationChecksByTransitivity, 32.9s TimeCoverageRelationStatistics Valid=548, Invalid=6230, Unknown=48, NotChecked=830, Total=7656 [2023-12-02 18:45:27,301 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 138 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-12-02 18:45:27,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 916 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1159 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-12-02 18:45:27,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-12-02 18:45:27,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2023-12-02 18:45:27,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 47 states have (on average 1.297872340425532) internal successors, (61), 59 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:45:27,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2023-12-02 18:45:27,304 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 38 [2023-12-02 18:45:27,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:45:27,305 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2023-12-02 18:45:27,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 42 states have (on average 2.119047619047619) internal successors, (89), 43 states have internal predecessors, (89), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 18:45:27,305 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2023-12-02 18:45:27,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-02 18:45:27,306 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:45:27,306 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:45:27,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2023-12-02 18:45:27,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (48)] Ended with exit code 0 [2023-12-02 18:45:27,713 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-12-02 18:45:27,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:45:27,907 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:45:27,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:45:27,907 INFO L85 PathProgramCache]: Analyzing trace with hash 764464167, now seen corresponding path program 1 times [2023-12-02 18:45:27,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:45:27,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [489296536] [2023-12-02 18:45:27,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:45:27,908 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:45:27,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:45:27,908 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 18:45:27,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2023-12-02 18:45:28,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:45:28,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 78 conjunts are in the unsatisfiable core [2023-12-02 18:45:28,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:45:28,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:45:28,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:45:28,667 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:45:28,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:45:28,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 18:45:28,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:45:28,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:45:29,026 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:45:29,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2023-12-02 18:45:29,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-12-02 18:45:29,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2023-12-02 18:45:29,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:45:29,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-02 18:45:29,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-02 18:45:29,889 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:45:29,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2023-12-02 18:45:29,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-12-02 18:45:30,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-12-02 18:45:30,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-02 18:45:30,296 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 18:45:30,297 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:45:30,907 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2279 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2280 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_2280) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_2279) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)))) (forall ((v_ArrVal_2280 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_2280) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0))))) is different from false [2023-12-02 18:45:30,962 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|) |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset|))) (and (forall ((v_ArrVal_2279 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2280 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_2280) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_2279) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)))) (forall ((v_ArrVal_2280 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_2280) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (bvule (bvadd (_ bv4 32) .cse1) (bvadd (_ bv8 32) .cse1)))))) is different from false [2023-12-02 18:45:31,018 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (and (forall ((v_ArrVal_2279 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2280 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_2280) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_2279) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)))) (forall ((v_ArrVal_2280 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_2280) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (bvule (bvadd (_ bv4 32) .cse1) (bvadd (_ bv8 32) .cse1)))))) is different from false [2023-12-02 18:45:31,113 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse3 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|)) (.cse0 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|)) (.cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset|))) (and (forall ((v_ArrVal_2277 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (store .cse0 .cse1 (select v_ArrVal_2277 .cse1)) v_ArrVal_2277)) (forall ((v_ArrVal_2280 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2278 (_ BitVec 32))) (let ((.cse2 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_2277) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| (store .cse3 .cse1 v_ArrVal_2278)) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) v_ArrVal_2280) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (bvule (bvadd (_ bv4 32) .cse2) (bvadd (_ bv8 32) .cse2)))))) (forall ((v_ArrVal_2277 (Array (_ BitVec 32) (_ BitVec 32)))) (or (forall ((v_ArrVal_2279 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2280 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2278 (_ BitVec 32))) (let ((.cse5 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| (store .cse3 .cse1 v_ArrVal_2278)))) (let ((.cse4 (select (select .cse5 |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (bvule (bvadd (_ bv8 32) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_2277) .cse4 v_ArrVal_2280) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) (select |c_#length| (select (select (store .cse5 .cse4 v_ArrVal_2279) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)))))) (not (= (store .cse0 .cse1 (select v_ArrVal_2277 .cse1)) v_ArrVal_2277)))))) is different from false [2023-12-02 18:45:31,227 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse4 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|))) (let ((.cse2 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|)) (.cse3 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~s~0#1.offset|)) (.cse1 (select .cse4 |c_ULTIMATE.start_main_~s~0#1.offset|))) (and (forall ((v_ArrVal_2277 (Array (_ BitVec 32) (_ BitVec 32)))) (or (forall ((v_ArrVal_2280 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base| v_ArrVal_2277) .cse1 v_ArrVal_2280) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (not (= (store .cse2 .cse3 (select v_ArrVal_2277 .cse3)) v_ArrVal_2277)))) (forall ((v_ArrVal_2277 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (store .cse2 .cse3 (select v_ArrVal_2277 .cse3)) v_ArrVal_2277)) (forall ((v_ArrVal_2279 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2280 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2278 (_ BitVec 32))) (bvule (bvadd (_ bv8 32) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base| v_ArrVal_2277) .cse1 v_ArrVal_2280) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) (select |c_#length| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| (store .cse4 .cse3 v_ArrVal_2278)) .cse1 v_ArrVal_2279) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))))))))) is different from false [2023-12-02 18:45:31,295 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (and (forall ((v_ArrVal_2273 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2274 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2277 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_2273))) (or (not (= v_ArrVal_2277 (store (select .cse0 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) .cse1 (select v_ArrVal_2277 .cse1)))) (forall ((v_ArrVal_2279 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2280 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2278 (_ BitVec 32))) (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_2274))) (let ((.cse4 (select .cse3 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|))) (let ((.cse2 (select .cse4 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (bvule (bvadd (_ bv8 32) (select (select (store (store .cse0 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| v_ArrVal_2277) .cse2 v_ArrVal_2280) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)) (select |c_#length| (select (select (store (store .cse3 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| (store .cse4 .cse1 v_ArrVal_2278)) .cse2 v_ArrVal_2279) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)))))))))) (forall ((v_ArrVal_2273 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2274 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2277 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse6 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_2273))) (or (forall ((v_ArrVal_2280 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse5 (select (select (store (store .cse6 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| v_ArrVal_2277) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_2274) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) v_ArrVal_2280) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (bvule (bvadd (_ bv4 32) .cse5) (bvadd (_ bv8 32) .cse5)))) (not (= v_ArrVal_2277 (store (select .cse6 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) .cse1 (select v_ArrVal_2277 .cse1))))))))) is different from false [2023-12-02 18:45:31,392 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:45:31,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 56 [2023-12-02 18:45:31,410 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:45:31,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 72 [2023-12-02 18:45:31,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 66 [2023-12-02 18:45:31,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2023-12-02 18:45:31,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2023-12-02 18:45:31,494 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:45:31,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 40 [2023-12-02 18:45:31,543 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:45:31,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 41 [2023-12-02 18:45:31,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2023-12-02 18:45:31,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-12-02 18:45:31,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2023-12-02 18:45:31,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2023-12-02 18:45:31,700 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 18:45:31,716 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:45:31,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 95 [2023-12-02 18:45:31,721 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 18:45:31,735 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:45:31,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 152 [2023-12-02 18:45:31,742 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 18:45:31,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 34 [2023-12-02 18:45:31,753 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 18:45:31,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-12-02 18:45:31,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-12-02 18:45:32,500 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:45:32,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [489296536] [2023-12-02 18:45:32,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [489296536] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:45:32,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1891911478] [2023-12-02 18:45:32,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:45:32,501 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:45:32,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:45:32,502 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:45:32,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2023-12-02 18:45:32,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:45:32,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 78 conjunts are in the unsatisfiable core [2023-12-02 18:45:32,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:45:32,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:45:32,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:45:33,144 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 18:45:33,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-12-02 18:45:33,170 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:45:33,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:45:33,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:45:33,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:45:33,288 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:45:33,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2023-12-02 18:45:33,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-12-02 18:45:33,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-02 18:45:33,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2023-12-02 18:45:34,113 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:45:34,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 60 [2023-12-02 18:45:34,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-02 18:45:34,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-12-02 18:45:34,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-12-02 18:45:34,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-12-02 18:45:34,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-02 18:45:34,972 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:45:34,972 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:45:36,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2023-12-02 18:45:52,384 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse4 (bvadd (_ bv4 32) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (and (forall ((v_ArrVal_2343 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2344 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2347 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_2343))) (or (forall ((v_ArrVal_2345 (_ BitVec 32)) (v_ArrVal_2348 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2349 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_2344))) (let ((.cse3 (select .cse2 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|))) (let ((.cse1 (select .cse3 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (bvule (bvadd (_ bv8 32) (select (select (store (store .cse0 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| v_ArrVal_2347) .cse1 v_ArrVal_2349) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)) (select |c_#length| (select (select (store (store .cse2 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| (store .cse3 .cse4 v_ArrVal_2345)) .cse1 v_ArrVal_2348) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))))))) (= (select v_ArrVal_2347 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (not (= (store (select .cse0 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) .cse4 (select v_ArrVal_2347 .cse4)) v_ArrVal_2347))))) (forall ((v_ArrVal_2343 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2344 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2347 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse6 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_2343))) (or (forall ((v_ArrVal_2349 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse5 (select (select (store (store .cse6 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| v_ArrVal_2347) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_2344) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) v_ArrVal_2349) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (bvule (bvadd (_ bv4 32) .cse5) (bvadd (_ bv8 32) .cse5)))) (= (select v_ArrVal_2347 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (not (= (store (select .cse6 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) .cse4 (select v_ArrVal_2347 .cse4)) v_ArrVal_2347))))) (forall ((v_ArrVal_2343 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2344 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse9 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_2344))) (let ((.cse10 (select .cse9 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|))) (let ((.cse7 (select .cse10 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (or (= .cse7 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) (forall ((v_ArrVal_2345 (_ BitVec 32)) (v_ArrVal_2347 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2348 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2349 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse8 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_2343))) (or (bvule (bvadd (_ bv8 32) (select (select (store (store .cse8 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| v_ArrVal_2347) .cse7 v_ArrVal_2349) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)) (select |c_#length| (select (select (store (store .cse9 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| (store .cse10 .cse4 v_ArrVal_2345)) .cse7 v_ArrVal_2348) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (not (= (store (select .cse8 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) .cse4 (select v_ArrVal_2347 .cse4)) v_ArrVal_2347)))))))))) (forall ((v_ArrVal_2343 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2344 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse11 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_2344) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (or (= .cse11 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) (forall ((v_ArrVal_2347 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2349 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse13 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_2343))) (or (let ((.cse12 (select (select (store (store .cse13 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| v_ArrVal_2347) .cse11 v_ArrVal_2349) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (bvule (bvadd (_ bv4 32) .cse12) (bvadd (_ bv8 32) .cse12))) (not (= (store (select .cse13 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) .cse4 (select v_ArrVal_2347 .cse4)) v_ArrVal_2347)))))))))) is different from false [2023-12-02 18:45:52,612 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:45:52,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 95 [2023-12-02 18:45:52,633 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:45:52,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 152 [2023-12-02 18:45:52,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 85 [2023-12-02 18:45:52,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 75 [2023-12-02 18:45:52,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2023-12-02 18:45:52,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-12-02 18:45:52,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 102 [2023-12-02 18:45:52,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2023-12-02 18:45:52,996 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:45:52,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 56 [2023-12-02 18:45:53,023 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:45:53,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 72 [2023-12-02 18:45:53,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2023-12-02 18:45:53,119 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:45:53,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 40 [2023-12-02 18:45:53,178 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:45:53,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 41 [2023-12-02 18:45:53,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 66 [2023-12-02 18:45:53,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2023-12-02 18:45:53,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2023-12-02 18:45:53,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-12-02 18:45:53,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 24 [2023-12-02 18:45:53,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2023-12-02 18:45:53,669 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:45:53,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 66 [2023-12-02 18:45:53,676 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 18:45:53,677 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 18:45:53,712 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:45:53,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2023-12-02 18:45:53,725 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 18:45:53,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-12-02 18:45:53,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2023-12-02 18:45:53,777 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 18:45:53,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-12-02 18:45:53,813 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 18:45:53,833 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:45:53,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 145 treesize of output 105 [2023-12-02 18:45:53,841 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 18:45:53,841 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 18:45:53,859 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:45:53,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2023-12-02 18:45:53,866 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 18:45:53,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2023-12-02 18:45:53,881 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 18:45:53,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-12-02 18:45:53,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-12-02 18:45:57,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1891911478] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:45:57,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369088411] [2023-12-02 18:45:57,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:45:57,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:45:57,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:45:57,324 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:45:57,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-12-02 18:45:57,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:45:57,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 55 conjunts are in the unsatisfiable core [2023-12-02 18:45:57,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:45:57,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:46:00,583 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:46:00,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:46:00,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 18:46:01,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:46:01,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:46:02,482 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:46:02,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2023-12-02 18:46:02,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-12-02 18:46:03,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-12-02 18:46:03,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2023-12-02 18:46:03,710 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:46:03,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2023-12-02 18:46:03,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-12-02 18:46:04,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-12-02 18:46:04,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-02 18:46:04,648 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 18:46:04,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:46:04,832 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2417 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2416 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_2416) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_2417) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)))) (forall ((v_ArrVal_2416 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_2416) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0))))) is different from false [2023-12-02 18:46:04,894 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|) |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset|))) (and (forall ((v_ArrVal_2417 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2416 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_2416) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_2417) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)))) (forall ((v_ArrVal_2416 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_2416) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (bvule (bvadd (_ bv4 32) .cse1) (bvadd (_ bv8 32) .cse1)))))) is different from false [2023-12-02 18:46:04,957 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (and (forall ((v_ArrVal_2417 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2416 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_2416) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_2417) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)))) (forall ((v_ArrVal_2416 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_2416) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (bvule (bvadd (_ bv4 32) .cse1) (bvadd (_ bv8 32) .cse1)))))) is different from false [2023-12-02 18:46:05,060 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|)) (.cse3 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|)) (.cse2 (bvadd (_ bv4 32) |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset|))) (and (forall ((v_ArrVal_2414 (Array (_ BitVec 32) (_ BitVec 32)))) (or (forall ((v_ArrVal_2415 (_ BitVec 32)) (v_ArrVal_2416 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_2414) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| (store .cse1 .cse2 v_ArrVal_2415)) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) v_ArrVal_2416) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (bvule (bvadd .cse0 (_ bv4 32)) (bvadd .cse0 (_ bv8 32))))) (not (= v_ArrVal_2414 (store .cse3 .cse2 (select v_ArrVal_2414 .cse2)))))) (forall ((v_ArrVal_2414 (Array (_ BitVec 32) (_ BitVec 32)))) (or (forall ((v_ArrVal_2415 (_ BitVec 32)) (v_ArrVal_2417 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2416 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse5 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| (store .cse1 .cse2 v_ArrVal_2415)))) (let ((.cse4 (select (select .cse5 |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (bvule (bvadd (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_2414) .cse4 v_ArrVal_2416) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) (_ bv8 32)) (select |c_#length| (select (select (store .cse5 .cse4 v_ArrVal_2417) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)))))) (not (= v_ArrVal_2414 (store .cse3 .cse2 (select v_ArrVal_2414 .cse2)))))))) is different from false [2023-12-02 18:46:05,184 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse3 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|))) (let ((.cse0 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|)) (.cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~s~0#1.offset|)) (.cse2 (select .cse3 |c_ULTIMATE.start_main_~s~0#1.offset|))) (and (forall ((v_ArrVal_2414 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (store .cse0 .cse1 (select v_ArrVal_2414 .cse1)) v_ArrVal_2414)) (forall ((v_ArrVal_2415 (_ BitVec 32)) (v_ArrVal_2417 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2416 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base| v_ArrVal_2414) .cse2 v_ArrVal_2416) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) (select |c_#length| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| (store .cse3 .cse1 v_ArrVal_2415)) .cse2 v_ArrVal_2417) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)))))) (forall ((v_ArrVal_2414 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (store .cse0 .cse1 (select v_ArrVal_2414 .cse1)) v_ArrVal_2414)) (forall ((v_ArrVal_2416 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse4 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base| v_ArrVal_2414) .cse2 v_ArrVal_2416) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (bvule (bvadd (_ bv4 32) .cse4) (bvadd (_ bv8 32) .cse4))))))))) is different from false [2023-12-02 18:46:05,261 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse4 (bvadd (_ bv4 32) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (and (forall ((v_ArrVal_2414 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2411 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2412 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_2412))) (or (forall ((v_ArrVal_2415 (_ BitVec 32)) (v_ArrVal_2417 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2416 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_2411))) (let ((.cse3 (select .cse2 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|))) (let ((.cse1 (select .cse3 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (bvule (bvadd (select (select (store (store .cse0 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| v_ArrVal_2414) .cse1 v_ArrVal_2416) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (_ bv8 32)) (select |c_#length| (select (select (store (store .cse2 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| (store .cse3 .cse4 v_ArrVal_2415)) .cse1 v_ArrVal_2417) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))))))) (not (= (store (select .cse0 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) .cse4 (select v_ArrVal_2414 .cse4)) v_ArrVal_2414))))) (forall ((v_ArrVal_2414 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2411 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2412 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse6 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_2412))) (or (forall ((v_ArrVal_2416 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse5 (select (select (store (store .cse6 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| v_ArrVal_2414) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_2411) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) v_ArrVal_2416) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (bvule (bvadd .cse5 (_ bv4 32)) (bvadd .cse5 (_ bv8 32))))) (not (= (store (select .cse6 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) .cse4 (select v_ArrVal_2414 .cse4)) v_ArrVal_2414))))))) is different from false [2023-12-02 18:46:05,364 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:46:05,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 95 [2023-12-02 18:46:05,381 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:46:05,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 152 [2023-12-02 18:46:05,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 85 [2023-12-02 18:46:05,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 75 [2023-12-02 18:46:05,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2023-12-02 18:46:05,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-12-02 18:46:05,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2023-12-02 18:46:05,499 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:46:05,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 50 [2023-12-02 18:46:05,532 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:46:05,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2023-12-02 18:46:05,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-12-02 18:46:05,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2023-12-02 18:46:05,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 55 [2023-12-02 18:46:05,916 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:46:05,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 56 [2023-12-02 18:46:05,944 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:46:05,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 72 [2023-12-02 18:46:05,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 66 [2023-12-02 18:46:05,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2023-12-02 18:46:06,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 51 [2023-12-02 18:46:06,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2023-12-02 18:46:06,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2023-12-02 18:46:06,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369088411] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:46:06,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:46:06,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24, 17] total 40 [2023-12-02 18:46:06,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036839070] [2023-12-02 18:46:06,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:46:06,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-12-02 18:46:06,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:46:06,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-12-02 18:46:06,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=3060, Unknown=47, NotChecked=1638, Total=5112 [2023-12-02 18:46:06,518 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 41 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 36 states have internal predecessors, (78), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 18:46:12,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:46:12,249 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2023-12-02 18:46:12,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 18:46:12,250 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 36 states have internal predecessors, (78), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 38 [2023-12-02 18:46:12,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:46:12,251 INFO L225 Difference]: With dead ends: 62 [2023-12-02 18:46:12,251 INFO L226 Difference]: Without dead ends: 62 [2023-12-02 18:46:12,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 13 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 32.3s TimeCoverageRelationStatistics Valid=524, Invalid=4173, Unknown=47, NotChecked=1898, Total=6642 [2023-12-02 18:46:12,255 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 96 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-12-02 18:46:12,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 776 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-12-02 18:46:12,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-12-02 18:46:12,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-12-02 18:46:12,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 58 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:46:12,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2023-12-02 18:46:12,258 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 38 [2023-12-02 18:46:12,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:46:12,259 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2023-12-02 18:46:12,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 36 states have internal predecessors, (78), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 18:46:12,259 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2023-12-02 18:46:12,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-02 18:46:12,260 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:46:12,260 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:46:12,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2023-12-02 18:46:12,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2023-12-02 18:46:12,665 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (51)] Ended with exit code 0 [2023-12-02 18:46:12,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 18:46:12,861 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:46:12,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:46:12,861 INFO L85 PathProgramCache]: Analyzing trace with hash -2056373387, now seen corresponding path program 1 times [2023-12-02 18:46:12,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:46:12,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1672748058] [2023-12-02 18:46:12,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:46:12,862 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:46:12,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:46:12,863 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 18:46:12,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2023-12-02 18:46:13,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:46:13,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 70 conjunts are in the unsatisfiable core [2023-12-02 18:46:13,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:46:13,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:46:13,534 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:46:13,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:46:13,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 18:46:13,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:46:13,807 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:46:13,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 38 [2023-12-02 18:46:13,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-12-02 18:46:14,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-12-02 18:46:14,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 18:46:14,518 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:46:14,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 59 [2023-12-02 18:46:14,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-12-02 18:46:14,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2023-12-02 18:46:15,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2023-12-02 18:46:15,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-12-02 18:46:15,439 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:46:15,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:46:16,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 56 [2023-12-02 18:46:16,824 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (and (= (_ bv1 32) |c_ULTIMATE.start_main_~i~0#1|) (forall ((v_ArrVal_2484 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_2484) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (forall ((v_ArrVal_2483 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_2483) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) .cse0)))) is different from false [2023-12-02 18:46:16,913 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|)) (.cse3 (bvadd (_ bv4 32) |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset|))) (and (forall ((v_ArrVal_2483 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2481 (_ BitVec 32))) (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| (store .cse2 .cse3 v_ArrVal_2481)))) (let ((.cse0 (select (select .cse1 |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (= .cse0 (select (select (store .cse1 .cse0 v_ArrVal_2483) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))))) (forall ((v_ArrVal_2480 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|) .cse3 (select v_ArrVal_2480 .cse3)) v_ArrVal_2480)) (forall ((v_ArrVal_2484 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2481 (_ BitVec 32))) (let ((.cse4 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_2480))) (= (select (select (store .cse4 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| (store .cse2 .cse3 v_ArrVal_2481)) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) v_ArrVal_2484) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) (select (select .cse4 |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)))))) (= (_ bv0 32) |c_ULTIMATE.start_main_~i~0#1|))) is different from false [2023-12-02 18:46:17,010 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|))) (let ((.cse2 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~s~0#1.offset|)) (.cse0 (select .cse1 |c_ULTIMATE.start_main_~s~0#1.offset|))) (and (= (_ bv0 32) |c_ULTIMATE.start_main_~i~0#1|) (forall ((v_ArrVal_2483 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2481 (_ BitVec 32))) (= .cse0 (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| (store .cse1 .cse2 v_ArrVal_2481)) .cse0 v_ArrVal_2483) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (forall ((v_ArrVal_2480 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) .cse2 (select v_ArrVal_2480 .cse2)) v_ArrVal_2480)) (forall ((v_ArrVal_2484 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select v_ArrVal_2480 |c_ULTIMATE.start_main_~s~0#1.offset|) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base| v_ArrVal_2480) .cse0 v_ArrVal_2484) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)))))))) is different from false [2023-12-02 18:46:17,065 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse3 (bvadd (_ bv4 32) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (and (forall ((v_ArrVal_2483 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2481 (_ BitVec 32)) (v_ArrVal_2477 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_2477))) (let ((.cse2 (select .cse1 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|))) (let ((.cse0 (select .cse2 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (= .cse0 (select (select (store (store .cse1 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| (store .cse2 .cse3 v_ArrVal_2481)) .cse0 v_ArrVal_2483) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)))))) (forall ((v_ArrVal_2480 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2477 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2478 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse4 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_2478))) (or (forall ((v_ArrVal_2484 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select v_ArrVal_2480 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (select (select (store (store .cse4 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| v_ArrVal_2480) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_2477) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) v_ArrVal_2484) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (not (= v_ArrVal_2480 (store (select .cse4 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) .cse3 (select v_ArrVal_2480 .cse3))))))))) is different from false [2023-12-02 18:46:17,117 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:46:17,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 34 [2023-12-02 18:46:17,131 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:46:17,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 56 [2023-12-02 18:46:17,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2023-12-02 18:46:17,162 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:46:17,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 50 [2023-12-02 18:46:17,179 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:46:17,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2023-12-02 18:46:17,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-12-02 18:46:17,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-12-02 18:46:17,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-12-02 18:46:17,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2023-12-02 18:46:17,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-12-02 18:46:17,241 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 18:46:17,250 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 18:46:17,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 1 [2023-12-02 18:46:18,388 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2023-12-02 18:46:18,388 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:46:18,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1672748058] [2023-12-02 18:46:18,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1672748058] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:46:18,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [597653914] [2023-12-02 18:46:18,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:46:18,388 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:46:18,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:46:18,390 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:46:18,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2023-12-02 18:46:18,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:46:18,917 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 60 conjunts are in the unsatisfiable core [2023-12-02 18:46:18,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:46:18,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:46:19,060 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:46:19,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:46:19,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:46:19,185 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:46:19,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2023-12-02 18:46:19,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-12-02 18:46:19,487 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:46:19,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 59 [2023-12-02 18:46:19,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-12-02 18:46:19,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2023-12-02 18:46:19,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2023-12-02 18:46:19,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-12-02 18:46:19,797 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:46:19,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:46:19,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 56 [2023-12-02 18:46:20,177 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:46:20,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2023-12-02 18:46:20,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2023-12-02 18:46:21,280 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:46:21,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2023-12-02 18:46:21,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2023-12-02 18:46:21,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-12-02 18:46:21,811 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:46:21,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [597653914] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:46:21,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898324681] [2023-12-02 18:46:21,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:46:21,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:46:21,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:46:21,813 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:46:21,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-12-02 18:46:22,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:46:22,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 71 conjunts are in the unsatisfiable core [2023-12-02 18:46:22,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:46:22,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:46:22,991 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:46:22,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:46:23,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:46:23,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:46:23,639 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:46:23,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 38 [2023-12-02 18:46:23,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-12-02 18:46:24,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-12-02 18:46:24,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2023-12-02 18:46:25,187 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:46:25,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 53 [2023-12-02 18:46:25,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-12-02 18:46:25,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-02 18:46:26,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-12-02 18:46:26,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-02 18:46:26,733 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:46:26,733 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:46:27,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 56 [2023-12-02 18:46:30,649 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (and (forall ((v_ArrVal_2606 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2604 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2603 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_2604))) (or (forall ((v_ArrVal_2484 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select v_ArrVal_2606 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (select (select (store (store .cse0 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| v_ArrVal_2606) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_2603) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) v_ArrVal_2484) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (not (= (store (select .cse0 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) .cse1 (select v_ArrVal_2606 .cse1)) v_ArrVal_2606))))) (forall ((v_ArrVal_2483 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2605 (_ BitVec 32)) (v_ArrVal_2603 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_2603))) (let ((.cse3 (select .cse2 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|))) (let ((.cse4 (select .cse3 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (= (select (select (store (store .cse2 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| (store .cse3 .cse1 v_ArrVal_2605)) .cse4 v_ArrVal_2483) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) .cse4))))))) is different from false [2023-12-02 18:46:30,693 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:46:30,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 43 [2023-12-02 18:46:30,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2023-12-02 18:46:30,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2023-12-02 18:46:30,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2023-12-02 18:46:30,760 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 18:46:30,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 1 [2023-12-02 18:46:31,247 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-12-02 18:46:31,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898324681] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:46:31,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 18:46:31,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 24, 23, 26, 25] total 77 [2023-12-02 18:46:31,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119083894] [2023-12-02 18:46:31,248 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 18:46:31,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2023-12-02 18:46:31,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:46:31,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2023-12-02 18:46:31,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=4794, Unknown=39, NotChecked=720, Total=5852 [2023-12-02 18:46:31,253 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand has 77 states, 71 states have (on average 1.7746478873239437) internal successors, (126), 69 states have internal predecessors, (126), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2023-12-02 18:46:39,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:46:39,978 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2023-12-02 18:46:39,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-02 18:46:39,979 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 71 states have (on average 1.7746478873239437) internal successors, (126), 69 states have internal predecessors, (126), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 41 [2023-12-02 18:46:39,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:46:39,980 INFO L225 Difference]: With dead ends: 59 [2023-12-02 18:46:39,980 INFO L226 Difference]: Without dead ends: 59 [2023-12-02 18:46:39,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 156 SyntacticMatches, 9 SemanticMatches, 92 ConstructedPredicates, 5 IntricatePredicates, 2 DeprecatedPredicates, 2592 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=525, Invalid=7288, Unknown=39, NotChecked=890, Total=8742 [2023-12-02 18:46:39,983 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 99 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 282 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:46:39,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 909 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1206 Invalid, 0 Unknown, 282 Unchecked, 5.0s Time] [2023-12-02 18:46:39,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-12-02 18:46:39,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-12-02 18:46:39,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 55 states have internal predecessors, (57), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:46:39,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2023-12-02 18:46:39,985 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 41 [2023-12-02 18:46:39,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:46:39,986 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2023-12-02 18:46:39,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 71 states have (on average 1.7746478873239437) internal successors, (126), 69 states have internal predecessors, (126), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2023-12-02 18:46:39,986 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2023-12-02 18:46:39,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-02 18:46:39,986 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:46:39,987 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:46:39,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (54)] Ended with exit code 0 [2023-12-02 18:46:40,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2023-12-02 18:46:40,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Ended with exit code 0 [2023-12-02 18:46:40,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:46:40,588 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:46:40,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:46:40,588 INFO L85 PathProgramCache]: Analyzing trace with hash -491400038, now seen corresponding path program 1 times [2023-12-02 18:46:40,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:46:40,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1833648418] [2023-12-02 18:46:40,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:46:40,588 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:46:40,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:46:40,589 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 18:46:40,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2023-12-02 18:46:40,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:46:40,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 18:46:40,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:46:40,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:46:41,075 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 18:46:41,076 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:46:41,076 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:46:41,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1833648418] [2023-12-02 18:46:41,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1833648418] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:46:41,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:46:41,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 18:46:41,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052107592] [2023-12-02 18:46:41,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:46:41,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 18:46:41,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:46:41,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 18:46:41,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:46:41,078 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 9 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:46:41,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:46:41,779 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2023-12-02 18:46:41,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 18:46:41,779 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2023-12-02 18:46:41,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:46:41,780 INFO L225 Difference]: With dead ends: 76 [2023-12-02 18:46:41,780 INFO L226 Difference]: Without dead ends: 76 [2023-12-02 18:46:41,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-12-02 18:46:41,781 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 39 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 18:46:41,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 158 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 18:46:41,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-12-02 18:46:41,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 62. [2023-12-02 18:46:41,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 58 states have internal predecessors, (63), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:46:41,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2023-12-02 18:46:41,784 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 43 [2023-12-02 18:46:41,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:46:41,784 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2023-12-02 18:46:41,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:46:41,784 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2023-12-02 18:46:41,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-02 18:46:41,784 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:46:41,785 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:46:41,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Ended with exit code 0 [2023-12-02 18:46:41,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:46:41,985 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:46:41,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:46:41,985 INFO L85 PathProgramCache]: Analyzing trace with hash -491400037, now seen corresponding path program 1 times [2023-12-02 18:46:41,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:46:41,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1220942048] [2023-12-02 18:46:41,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:46:41,986 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:46:41,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:46:41,987 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 18:46:41,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2023-12-02 18:46:42,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:46:42,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 18:46:42,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:46:42,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:46:42,655 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 18:46:42,656 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:46:42,656 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:46:42,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1220942048] [2023-12-02 18:46:42,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1220942048] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:46:42,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:46:42,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 18:46:42,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729900101] [2023-12-02 18:46:42,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:46:42,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 18:46:42,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:46:42,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 18:46:42,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:46:42,658 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand has 9 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:46:43,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:46:43,344 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2023-12-02 18:46:43,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 18:46:43,345 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2023-12-02 18:46:43,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:46:43,346 INFO L225 Difference]: With dead ends: 60 [2023-12-02 18:46:43,346 INFO L226 Difference]: Without dead ends: 60 [2023-12-02 18:46:43,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-12-02 18:46:43,346 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 41 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 18:46:43,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 145 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 18:46:43,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-12-02 18:46:43,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-12-02 18:46:43,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 56 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:46:43,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2023-12-02 18:46:43,349 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 43 [2023-12-02 18:46:43,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:46:43,349 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2023-12-02 18:46:43,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:46:43,349 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2023-12-02 18:46:43,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-02 18:46:43,349 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:46:43,349 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:46:43,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Ended with exit code 0 [2023-12-02 18:46:43,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:46:43,550 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:46:43,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:46:43,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1946501890, now seen corresponding path program 1 times [2023-12-02 18:46:43,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:46:43,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1328975929] [2023-12-02 18:46:43,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:46:43,551 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:46:43,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:46:43,552 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 18:46:43,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2023-12-02 18:46:43,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:46:43,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 18:46:43,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:46:43,988 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 18:46:43,988 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:46:43,988 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:46:43,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1328975929] [2023-12-02 18:46:43,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1328975929] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:46:43,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:46:43,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-02 18:46:43,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844611169] [2023-12-02 18:46:43,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:46:43,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 18:46:43,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:46:43,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 18:46:43,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:46:43,990 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 9 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:46:44,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:46:44,514 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2023-12-02 18:46:44,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 18:46:44,514 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2023-12-02 18:46:44,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:46:44,515 INFO L225 Difference]: With dead ends: 60 [2023-12-02 18:46:44,515 INFO L226 Difference]: Without dead ends: 60 [2023-12-02 18:46:44,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-12-02 18:46:44,516 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 40 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 18:46:44,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 176 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 18:46:44,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-12-02 18:46:44,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-12-02 18:46:44,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 56 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:46:44,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2023-12-02 18:46:44,518 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 44 [2023-12-02 18:46:44,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:46:44,519 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2023-12-02 18:46:44,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:46:44,519 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2023-12-02 18:46:44,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 18:46:44,519 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:46:44,519 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:46:44,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Ended with exit code 0 [2023-12-02 18:46:44,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:46:44,720 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:46:44,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:46:44,720 INFO L85 PathProgramCache]: Analyzing trace with hash 211038115, now seen corresponding path program 1 times [2023-12-02 18:46:44,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:46:44,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1197278409] [2023-12-02 18:46:44,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:46:44,721 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:46:44,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:46:44,722 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 18:46:44,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2023-12-02 18:46:44,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:46:44,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 18:46:44,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:46:45,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-02 18:46:45,135 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 18:46:45,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:46:45,186 INFO L349 Elim1Store]: treesize reduction 7, result has 50.0 percent of original size [2023-12-02 18:46:45,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2023-12-02 18:46:45,227 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-12-02 18:46:45,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 18:46:45,249 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 18:46:45,249 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:46:45,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1197278409] [2023-12-02 18:46:45,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1197278409] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:46:45,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1744660636] [2023-12-02 18:46:45,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:46:45,250 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:46:45,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:46:45,251 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:46:45,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2023-12-02 18:46:45,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:46:45,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 18:46:45,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:46:46,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-02 18:46:46,292 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 18:46:46,292 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:46:46,346 INFO L349 Elim1Store]: treesize reduction 7, result has 50.0 percent of original size [2023-12-02 18:46:46,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2023-12-02 18:46:46,383 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-12-02 18:46:46,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 18:46:46,458 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 18:46:46,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1744660636] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:46:46,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326997534] [2023-12-02 18:46:46,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:46:46,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:46:46,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:46:46,459 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:46:46,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-12-02 18:46:46,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:46:46,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 18:46:46,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:46:46,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-02 18:46:46,737 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 18:46:46,737 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:46:46,782 INFO L349 Elim1Store]: treesize reduction 7, result has 50.0 percent of original size [2023-12-02 18:46:46,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2023-12-02 18:46:46,823 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-12-02 18:46:46,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 18:46:46,848 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 18:46:46,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326997534] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:46:46,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 18:46:46,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 12, 6, 6, 6] total 16 [2023-12-02 18:46:46,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221114675] [2023-12-02 18:46:46,848 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 18:46:46,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 18:46:46,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:46:46,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 18:46:46,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2023-12-02 18:46:46,850 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand has 17 states, 15 states have (on average 4.2) internal successors, (63), 16 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 18:46:48,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:46:48,067 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2023-12-02 18:46:48,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 18:46:48,068 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 4.2) internal successors, (63), 16 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2023-12-02 18:46:48,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:46:48,069 INFO L225 Difference]: With dead ends: 67 [2023-12-02 18:46:48,069 INFO L226 Difference]: Without dead ends: 67 [2023-12-02 18:46:48,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2023-12-02 18:46:48,070 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 101 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:46:48,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 256 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-02 18:46:48,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-12-02 18:46:48,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2023-12-02 18:46:48,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 50 states have (on average 1.2) internal successors, (60), 56 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:46:48,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2023-12-02 18:46:48,073 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 45 [2023-12-02 18:46:48,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:46:48,073 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2023-12-02 18:46:48,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 4.2) internal successors, (63), 16 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 18:46:48,073 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2023-12-02 18:46:48,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 18:46:48,074 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:46:48,074 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:46:48,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Ended with exit code 0 [2023-12-02 18:46:48,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (60)] Ended with exit code 0 [2023-12-02 18:46:48,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2023-12-02 18:46:48,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:46:48,675 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2023-12-02 18:46:48,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:46:48,675 INFO L85 PathProgramCache]: Analyzing trace with hash 211038116, now seen corresponding path program 1 times [2023-12-02 18:46:48,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:46:48,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [820479018] [2023-12-02 18:46:48,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:46:48,676 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:46:48,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:46:48,677 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 18:46:48,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2023-12-02 18:46:49,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:46:49,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 84 conjunts are in the unsatisfiable core [2023-12-02 18:46:49,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:46:49,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:46:49,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:46:49,644 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:46:49,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:46:49,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 18:46:49,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:46:49,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:46:50,087 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:46:50,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2023-12-02 18:46:50,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-12-02 18:46:50,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-02 18:46:50,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2023-12-02 18:46:50,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:46:51,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-02 18:46:51,091 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:46:51,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2023-12-02 18:46:51,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-12-02 18:46:51,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-12-02 18:46:51,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-02 18:46:51,811 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:46:51,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:46:52,621 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2990 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_2990) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((v_ArrVal_2990 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2991 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_2990) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_2991) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))))) is different from false [2023-12-02 18:46:52,677 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|) |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset|))) (and (forall ((v_ArrVal_2990 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_2990) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((v_ArrVal_2990 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2991 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_2990) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_2991) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)))))) is different from false [2023-12-02 18:46:52,738 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (and (forall ((v_ArrVal_2990 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_2990) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((v_ArrVal_2990 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2991 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_2990) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_2991) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)))))) is different from false [2023-12-02 18:46:52,852 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|)) (.cse4 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|)) (.cse3 (bvadd (_ bv4 32) |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset|))) (and (forall ((v_ArrVal_2989 (Array (_ BitVec 32) (_ BitVec 32)))) (or (forall ((v_ArrVal_2986 (_ BitVec 32)) (v_ArrVal_2990 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2991 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| (store .cse2 .cse3 v_ArrVal_2986)))) (let ((.cse0 (select (select .cse1 |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (bvule (bvadd (_ bv4 32) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_2989) .cse0 v_ArrVal_2990) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) (select |c_#length| (select (select (store .cse1 .cse0 v_ArrVal_2991) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)))))) (not (= v_ArrVal_2989 (store .cse4 .cse3 (select v_ArrVal_2989 .cse3)))))) (forall ((v_ArrVal_2989 (Array (_ BitVec 32) (_ BitVec 32)))) (or (forall ((v_ArrVal_2986 (_ BitVec 32)) (v_ArrVal_2990 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse5 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_2989) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| (store .cse2 .cse3 v_ArrVal_2986)) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) v_ArrVal_2990) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (bvule .cse5 (bvadd (_ bv4 32) .cse5)))) (not (= v_ArrVal_2989 (store .cse4 .cse3 (select v_ArrVal_2989 .cse3)))))))) is different from false [2023-12-02 18:46:52,972 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|))) (let ((.cse0 (select .cse1 |c_ULTIMATE.start_main_~s~0#1.offset|)) (.cse3 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|)) (.cse2 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~s~0#1.offset|))) (and (forall ((v_ArrVal_2989 (Array (_ BitVec 32) (_ BitVec 32)))) (or (forall ((v_ArrVal_2986 (_ BitVec 32)) (v_ArrVal_2990 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2991 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base| v_ArrVal_2989) .cse0 v_ArrVal_2990) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) (_ bv4 32)) (select |c_#length| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| (store .cse1 .cse2 v_ArrVal_2986)) .cse0 v_ArrVal_2991) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)))) (not (= v_ArrVal_2989 (store .cse3 .cse2 (select v_ArrVal_2989 .cse2)))))) (forall ((v_ArrVal_2989 (Array (_ BitVec 32) (_ BitVec 32)))) (or (forall ((v_ArrVal_2990 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse4 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base| v_ArrVal_2989) .cse0 v_ArrVal_2990) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (bvule .cse4 (bvadd .cse4 (_ bv4 32))))) (not (= v_ArrVal_2989 (store .cse3 .cse2 (select v_ArrVal_2989 .cse2))))))))) is different from false [2023-12-02 18:46:53,043 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (and (forall ((v_ArrVal_2985 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2984 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2989 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_2985))) (or (not (= (store (select .cse0 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) .cse1 (select v_ArrVal_2989 .cse1)) v_ArrVal_2989)) (forall ((v_ArrVal_2986 (_ BitVec 32)) (v_ArrVal_2990 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2991 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_2984))) (let ((.cse4 (select .cse3 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|))) (let ((.cse2 (select .cse4 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (bvule (bvadd (select (select (store (store .cse0 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| v_ArrVal_2989) .cse2 v_ArrVal_2990) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (_ bv4 32)) (select |c_#length| (select (select (store (store .cse3 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| (store .cse4 .cse1 v_ArrVal_2986)) .cse2 v_ArrVal_2991) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)))))))))) (forall ((v_ArrVal_2985 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2984 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2989 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse5 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_2985))) (or (not (= (store (select .cse5 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) .cse1 (select v_ArrVal_2989 .cse1)) v_ArrVal_2989)) (forall ((v_ArrVal_2990 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse6 (select (select (store (store .cse5 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| v_ArrVal_2989) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_2984) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) v_ArrVal_2990) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (bvule .cse6 (bvadd .cse6 (_ bv4 32)))))))))) is different from false [2023-12-02 18:46:53,131 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:46:53,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 54 [2023-12-02 18:46:53,153 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:46:53,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 68 [2023-12-02 18:46:53,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 62 [2023-12-02 18:46:53,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 54 [2023-12-02 18:46:53,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2023-12-02 18:46:53,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2023-12-02 18:46:53,251 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:46:53,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 40 [2023-12-02 18:46:53,294 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:46:53,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 41 [2023-12-02 18:46:53,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2023-12-02 18:46:53,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2023-12-02 18:46:53,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2023-12-02 18:46:53,417 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 18:46:53,436 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:46:53,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 95 [2023-12-02 18:46:53,442 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 18:46:53,460 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:46:53,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 152 [2023-12-02 18:46:53,468 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 18:46:53,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 34 [2023-12-02 18:46:53,483 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 18:46:53,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-12-02 18:46:53,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-12-02 18:46:54,521 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:46:54,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [820479018] [2023-12-02 18:46:54,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [820479018] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:46:54,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [349549375] [2023-12-02 18:46:54,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:46:54,522 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:46:54,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:46:54,523 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:46:54,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_debbe056-fc30-4e38-8d87-5f5d7688e580/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (63)] Waiting until timeout for monitored process [2023-12-02 18:46:55,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:46:55,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 83 conjunts are in the unsatisfiable core [2023-12-02 18:46:55,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:46:55,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:46:55,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:46:55,454 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 18:46:55,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-12-02 18:46:55,490 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:46:55,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:46:55,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:46:55,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:46:55,659 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:46:55,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2023-12-02 18:46:55,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-12-02 18:46:55,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-02 18:46:55,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2023-12-02 18:46:56,769 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:46:56,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 60 [2023-12-02 18:46:56,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-12-02 18:46:56,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-02 18:46:57,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-12-02 18:46:57,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-12-02 18:46:57,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-02 18:46:57,937 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 18:46:57,937 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:46:59,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26