./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-sets/test_mutex_unbounded-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_e19646d8-e265-4fc8-af2e-3e54362954d4/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19646d8-e265-4fc8-af2e-3e54362954d4/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19646d8-e265-4fc8-af2e-3e54362954d4/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19646d8-e265-4fc8-af2e-3e54362954d4/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-sets/test_mutex_unbounded-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19646d8-e265-4fc8-af2e-3e54362954d4/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19646d8-e265-4fc8-af2e-3e54362954d4/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 10aecdd717bb6691571ad1da0b912f030832fb85361f767ea82293acfe046216 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 01:03:20,978 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 01:03:21,094 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19646d8-e265-4fc8-af2e-3e54362954d4/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 01:03:21,106 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 01:03:21,107 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 01:03:21,146 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 01:03:21,147 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 01:03:21,148 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 01:03:21,149 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 01:03:21,154 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 01:03:21,154 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 01:03:21,155 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 01:03:21,156 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 01:03:21,158 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 01:03:21,158 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 01:03:21,159 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 01:03:21,159 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 01:03:21,159 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 01:03:21,160 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 01:03:21,160 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 01:03:21,161 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 01:03:21,161 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 01:03:21,163 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 01:03:21,163 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 01:03:21,163 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 01:03:21,164 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 01:03:21,164 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 01:03:21,165 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 01:03:21,165 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 01:03:21,166 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 01:03:21,167 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 01:03:21,167 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 01:03:21,167 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 01:03:21,168 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 01:03:21,168 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 01:03:21,168 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 01:03:21,169 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:03:21,169 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 01:03:21,169 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 01:03:21,169 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 01:03:21,170 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 01:03:21,170 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 01:03:21,170 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 01:03:21,171 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 01:03:21,171 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 01:03:21,171 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_e19646d8-e265-4fc8-af2e-3e54362954d4/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19646d8-e265-4fc8-af2e-3e54362954d4/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10aecdd717bb6691571ad1da0b912f030832fb85361f767ea82293acfe046216 [2023-11-12 01:03:21,464 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 01:03:21,505 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 01:03:21,508 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 01:03:21,509 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 01:03:21,510 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 01:03:21,513 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19646d8-e265-4fc8-af2e-3e54362954d4/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/ldv-sets/test_mutex_unbounded-1.i [2023-11-12 01:03:24,574 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 01:03:24,858 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 01:03:24,859 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19646d8-e265-4fc8-af2e-3e54362954d4/sv-benchmarks/c/ldv-sets/test_mutex_unbounded-1.i [2023-11-12 01:03:24,877 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19646d8-e265-4fc8-af2e-3e54362954d4/bin/utaipan-verify-NcY6lQBIFX/data/ae003db83/9199f3ff52fe4c79a41aa0adab74e870/FLAGd18a63a0a [2023-11-12 01:03:24,892 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19646d8-e265-4fc8-af2e-3e54362954d4/bin/utaipan-verify-NcY6lQBIFX/data/ae003db83/9199f3ff52fe4c79a41aa0adab74e870 [2023-11-12 01:03:24,895 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 01:03:24,897 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 01:03:24,899 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 01:03:24,899 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 01:03:24,904 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 01:03:24,905 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:03:24" (1/1) ... [2023-11-12 01:03:24,907 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1526455d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:24, skipping insertion in model container [2023-11-12 01:03:24,907 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:03:24" (1/1) ... [2023-11-12 01:03:24,957 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 01:03:25,292 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19646d8-e265-4fc8-af2e-3e54362954d4/sv-benchmarks/c/ldv-sets/test_mutex_unbounded-1.i[26271,26284] [2023-11-12 01:03:25,298 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19646d8-e265-4fc8-af2e-3e54362954d4/sv-benchmarks/c/ldv-sets/test_mutex_unbounded-1.i[26396,26409] [2023-11-12 01:03:25,301 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19646d8-e265-4fc8-af2e-3e54362954d4/sv-benchmarks/c/ldv-sets/test_mutex_unbounded-1.i[26511,26524] [2023-11-12 01:03:25,313 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:03:25,324 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 01:03:25,370 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19646d8-e265-4fc8-af2e-3e54362954d4/sv-benchmarks/c/ldv-sets/test_mutex_unbounded-1.i[26271,26284] [2023-11-12 01:03:25,371 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19646d8-e265-4fc8-af2e-3e54362954d4/sv-benchmarks/c/ldv-sets/test_mutex_unbounded-1.i[26396,26409] [2023-11-12 01:03:25,373 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19646d8-e265-4fc8-af2e-3e54362954d4/sv-benchmarks/c/ldv-sets/test_mutex_unbounded-1.i[26511,26524] [2023-11-12 01:03:25,383 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:03:25,437 INFO L206 MainTranslator]: Completed translation [2023-11-12 01:03:25,437 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:25 WrapperNode [2023-11-12 01:03:25,438 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 01:03:25,439 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 01:03:25,439 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 01:03:25,439 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 01:03:25,447 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:25" (1/1) ... [2023-11-12 01:03:25,472 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:25" (1/1) ... [2023-11-12 01:03:25,510 INFO L138 Inliner]: procedures = 142, calls = 62, calls flagged for inlining = 15, calls inlined = 14, statements flattened = 184 [2023-11-12 01:03:25,510 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 01:03:25,511 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 01:03:25,511 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 01:03:25,511 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 01:03:25,522 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:25" (1/1) ... [2023-11-12 01:03:25,522 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:25" (1/1) ... [2023-11-12 01:03:25,531 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:25" (1/1) ... [2023-11-12 01:03:25,531 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:25" (1/1) ... [2023-11-12 01:03:25,548 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:25" (1/1) ... [2023-11-12 01:03:25,556 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:25" (1/1) ... [2023-11-12 01:03:25,562 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:25" (1/1) ... [2023-11-12 01:03:25,566 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:25" (1/1) ... [2023-11-12 01:03:25,574 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 01:03:25,580 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 01:03:25,581 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 01:03:25,581 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 01:03:25,600 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:25" (1/1) ... [2023-11-12 01:03:25,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:03:25,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19646d8-e265-4fc8-af2e-3e54362954d4/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:03:25,636 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19646d8-e265-4fc8-af2e-3e54362954d4/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 01:03:25,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19646d8-e265-4fc8-af2e-3e54362954d4/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 01:03:25,709 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2023-11-12 01:03:25,709 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2023-11-12 01:03:25,710 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_add [2023-11-12 01:03:25,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_add [2023-11-12 01:03:25,710 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 01:03:25,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 01:03:25,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 01:03:25,711 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_in_set [2023-11-12 01:03:25,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_in_set [2023-11-12 01:03:25,711 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 01:03:25,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 01:03:25,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 01:03:25,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 01:03:25,712 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_successful_malloc [2023-11-12 01:03:25,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_successful_malloc [2023-11-12 01:03:25,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 01:03:25,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 01:03:25,953 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 01:03:25,955 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 01:03:26,383 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 01:03:26,574 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 01:03:26,575 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-12 01:03:26,578 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:03:26 BoogieIcfgContainer [2023-11-12 01:03:26,578 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 01:03:26,582 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 01:03:26,582 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 01:03:26,585 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 01:03:26,586 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 01:03:24" (1/3) ... [2023-11-12 01:03:26,587 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dfe103d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:03:26, skipping insertion in model container [2023-11-12 01:03:26,587 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:25" (2/3) ... [2023-11-12 01:03:26,589 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dfe103d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:03:26, skipping insertion in model container [2023-11-12 01:03:26,589 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:03:26" (3/3) ... [2023-11-12 01:03:26,590 INFO L112 eAbstractionObserver]: Analyzing ICFG test_mutex_unbounded-1.i [2023-11-12 01:03:26,612 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 01:03:26,612 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-11-12 01:03:26,665 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 01:03:26,673 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@2edf435e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 01:03:26,673 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-12 01:03:26,678 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 34 states have internal predecessors, (44), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-12 01:03:26,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-12 01:03:26,687 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:03:26,688 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 01:03:26,688 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:03:26,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:03:26,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1947385289, now seen corresponding path program 1 times [2023-11-12 01:03:26,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:03:26,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627474050] [2023-11-12 01:03:26,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:26,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:03:26,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:27,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:03:27,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:03:27,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627474050] [2023-11-12 01:03:27,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627474050] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:03:27,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:03:27,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 01:03:27,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467630191] [2023-11-12 01:03:27,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:03:27,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:03:27,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:03:27,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:03:27,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:03:27,103 INFO L87 Difference]: Start difference. First operand has 47 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 34 states have internal predecessors, (44), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:03:27,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:03:27,306 INFO L93 Difference]: Finished difference Result 126 states and 163 transitions. [2023-11-12 01:03:27,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 01:03:27,313 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-12 01:03:27,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:03:27,323 INFO L225 Difference]: With dead ends: 126 [2023-11-12 01:03:27,324 INFO L226 Difference]: Without dead ends: 80 [2023-11-12 01:03:27,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:03:27,331 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 42 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:03:27,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 101 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:03:27,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-11-12 01:03:27,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2023-11-12 01:03:27,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 47 states have (on average 1.3617021276595744) internal successors, (64), 49 states have internal predecessors, (64), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-12 01:03:27,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 86 transitions. [2023-11-12 01:03:27,397 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 86 transitions. Word has length 6 [2023-11-12 01:03:27,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:03:27,397 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 86 transitions. [2023-11-12 01:03:27,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:03:27,398 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 86 transitions. [2023-11-12 01:03:27,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-12 01:03:27,400 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:03:27,400 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:03:27,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 01:03:27,401 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:03:27,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:03:27,402 INFO L85 PathProgramCache]: Analyzing trace with hash -629496666, now seen corresponding path program 1 times [2023-11-12 01:03:27,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:03:27,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250248267] [2023-11-12 01:03:27,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:27,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:03:27,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:27,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:03:27,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:03:27,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250248267] [2023-11-12 01:03:27,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250248267] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:03:27,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:03:27,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 01:03:27,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373744376] [2023-11-12 01:03:27,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:03:27,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:03:27,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:03:27,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:03:27,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:03:27,589 INFO L87 Difference]: Start difference. First operand 66 states and 86 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2023-11-12 01:03:27,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:03:27,786 INFO L93 Difference]: Finished difference Result 115 states and 145 transitions. [2023-11-12 01:03:27,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 01:03:27,787 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 11 [2023-11-12 01:03:27,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:03:27,790 INFO L225 Difference]: With dead ends: 115 [2023-11-12 01:03:27,790 INFO L226 Difference]: Without dead ends: 54 [2023-11-12 01:03:27,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:03:27,793 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 12 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:03:27,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 107 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:03:27,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-12 01:03:27,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2023-11-12 01:03:27,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.28125) internal successors, (41), 35 states have internal predecessors, (41), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-12 01:03:27,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2023-11-12 01:03:27,810 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 11 [2023-11-12 01:03:27,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:03:27,810 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2023-11-12 01:03:27,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2023-11-12 01:03:27,811 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2023-11-12 01:03:27,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-12 01:03:27,813 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:03:27,813 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:03:27,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 01:03:27,814 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:03:27,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:03:27,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1966025142, now seen corresponding path program 1 times [2023-11-12 01:03:27,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:03:27,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628904001] [2023-11-12 01:03:27,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:27,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:03:27,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:28,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:03:28,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:03:28,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628904001] [2023-11-12 01:03:28,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628904001] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:03:28,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615161213] [2023-11-12 01:03:28,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:28,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:03:28,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19646d8-e265-4fc8-af2e-3e54362954d4/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:03:28,446 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19646d8-e265-4fc8-af2e-3e54362954d4/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:03:28,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19646d8-e265-4fc8-af2e-3e54362954d4/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 01:03:28,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:28,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-12 01:03:28,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:03:28,829 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-12 01:03:28,830 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-12 01:03:29,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 01:03:29,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 01:03:29,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 01:03:29,057 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2023-11-12 01:03:29,067 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2023-11-12 01:03:29,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 01:03:29,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 01:03:29,080 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 01:03:29,086 INFO L351 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 16 [2023-11-12 01:03:29,101 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 [2023-11-12 01:03:29,120 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 1 [2023-11-12 01:03:29,127 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-12 01:03:29,141 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 32 [2023-11-12 01:03:29,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 01:03:29,150 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-12 01:03:29,155 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-12 01:03:29,160 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 27 [2023-11-12 01:03:29,164 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 01:03:29,167 INFO L351 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 9 treesize of output 8 [2023-11-12 01:03:29,174 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 1 [2023-11-12 01:03:29,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 01:03:29,184 INFO L351 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2023-11-12 01:03:29,188 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-12 01:03:29,193 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 01:03:29,205 INFO L351 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 17 treesize of output 16 [2023-11-12 01:03:29,214 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-12 01:03:29,229 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 1 [2023-11-12 01:03:29,235 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-12 01:03:29,380 INFO L351 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 [2023-11-12 01:03:29,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:03:29,410 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:03:29,897 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 01:03:29,898 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 4830 treesize of output 4687 [2023-11-12 01:03:29,987 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2742 treesize of output 2692 [2023-11-12 01:03:30,240 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 992 treesize of output 988 [2023-11-12 01:03:30,646 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 01:03:30,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 01:03:30,650 INFO L351 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 [2023-11-12 01:03:30,656 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 01:03:30,658 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-11-12 01:03:30,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 01:03:30,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 01:03:30,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 01:03:30,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:03:30,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615161213] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:03:30,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [321600744] [2023-11-12 01:03:30,843 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-11-12 01:03:30,844 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:03:30,847 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:03:30,854 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:03:30,854 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:03:32,996 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_successful_malloc with input of size 96 for LOIs [2023-11-12 01:03:33,072 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_list_add with input of size 31 for LOIs [2023-11-12 01:03:33,222 INFO L197 IcfgInterpreter]: Interpreting procedure __ldv_list_add with input of size 39 for LOIs [2023-11-12 01:03:33,238 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:03:42,955 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '699#(and (= |~#drvlist~0.offset| 0) (<= 0 (+ |ULTIMATE.start_foo_~N~0#1| 2147483648)) (<= 1 |#StackHeapBarrier|) (or (not (= (select (select |#memory_$Pointer$.base| 3) 0) 3)) (not (= (select (select |#memory_$Pointer$.offset| 3) 0) 0))) (<= |ULTIMATE.start_foo_~N~0#1| |ULTIMATE.start_foo_~i~0#1|) (= |~#mutexes~0.base| 3) (= (+ 8 |ULTIMATE.start_foo_~me~1#1.offset|) 0) (= 4 |ULTIMATE.start_foo_~me~1#1.base|) (= |ULTIMATE.start_ldv_list_empty_#res#1| 0) (= |ULTIMATE.start_ldv_set_empty_#res#1| 0) (= |~#mutexes~0.offset| 0) (<= |ULTIMATE.start_foo_~N~0#1| 2147483647) (= (select (select |#memory_$Pointer$.offset| 4) 0) 0) (= (select (select |#memory_$Pointer$.base| 4) 0) 4) (= 4 |~#drvlist~0.base|) (<= 0 |ULTIMATE.start_foo_~i~0#1|))' at error location [2023-11-12 01:03:42,956 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:03:42,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:03:42,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 32 [2023-11-12 01:03:42,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425277417] [2023-11-12 01:03:42,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:03:42,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-12 01:03:42,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:03:42,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-12 01:03:42,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=2137, Unknown=2, NotChecked=0, Total=2352 [2023-11-12 01:03:42,960 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 32 states, 20 states have (on average 1.65) internal successors, (33), 25 states have internal predecessors, (33), 9 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-12 01:03:45,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:03:45,292 INFO L93 Difference]: Finished difference Result 142 states and 177 transitions. [2023-11-12 01:03:45,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-12 01:03:45,294 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 20 states have (on average 1.65) internal successors, (33), 25 states have internal predecessors, (33), 9 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 19 [2023-11-12 01:03:45,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:03:45,296 INFO L225 Difference]: With dead ends: 142 [2023-11-12 01:03:45,296 INFO L226 Difference]: Without dead ends: 126 [2023-11-12 01:03:45,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=449, Invalid=3839, Unknown=2, NotChecked=0, Total=4290 [2023-11-12 01:03:45,303 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 444 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-12 01:03:45,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 433 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 922 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-12 01:03:45,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-12 01:03:45,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 85. [2023-11-12 01:03:45,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 60 states have (on average 1.3666666666666667) internal successors, (82), 64 states have internal predecessors, (82), 14 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-12 01:03:45,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 110 transitions. [2023-11-12 01:03:45,342 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 110 transitions. Word has length 19 [2023-11-12 01:03:45,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:03:45,342 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 110 transitions. [2023-11-12 01:03:45,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 20 states have (on average 1.65) internal successors, (33), 25 states have internal predecessors, (33), 9 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-12 01:03:45,343 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 110 transitions. [2023-11-12 01:03:45,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-12 01:03:45,345 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:03:45,345 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:03:45,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19646d8-e265-4fc8-af2e-3e54362954d4/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 01:03:45,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19646d8-e265-4fc8-af2e-3e54362954d4/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:03:45,551 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:03:45,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:03:45,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1595909235, now seen corresponding path program 1 times [2023-11-12 01:03:45,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:03:45,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751058953] [2023-11-12 01:03:45,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:45,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:03:45,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:45,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 01:03:45,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:03:45,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751058953] [2023-11-12 01:03:45,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751058953] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:03:45,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:03:45,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 01:03:45,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219479131] [2023-11-12 01:03:45,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:03:45,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:03:45,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:03:45,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:03:45,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:03:45,659 INFO L87 Difference]: Start difference. First operand 85 states and 110 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, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-12 01:03:45,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:03:45,755 INFO L93 Difference]: Finished difference Result 97 states and 127 transitions. [2023-11-12 01:03:45,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 01:03:45,756 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, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 24 [2023-11-12 01:03:45,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:03:45,758 INFO L225 Difference]: With dead ends: 97 [2023-11-12 01:03:45,758 INFO L226 Difference]: Without dead ends: 95 [2023-11-12 01:03:45,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:03:45,759 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:03:45,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 120 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:03:45,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-12 01:03:45,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2023-11-12 01:03:45,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 66 states have (on average 1.3333333333333333) internal successors, (88), 70 states have internal predecessors, (88), 14 states have call successors, (14), 8 states have call predecessors, (14), 10 states have return successors, (20), 14 states have call predecessors, (20), 14 states have call successors, (20) [2023-11-12 01:03:45,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 122 transitions. [2023-11-12 01:03:45,778 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 122 transitions. Word has length 24 [2023-11-12 01:03:45,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:03:45,778 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 122 transitions. [2023-11-12 01:03:45,779 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, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-12 01:03:45,779 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 122 transitions. [2023-11-12 01:03:45,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-12 01:03:45,780 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:03:45,780 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:03:45,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 01:03:45,780 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:03:45,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:03:45,781 INFO L85 PathProgramCache]: Analyzing trace with hash -897174793, now seen corresponding path program 1 times [2023-11-12 01:03:45,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:03:45,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852967255] [2023-11-12 01:03:45,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:45,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:03:45,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:48,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:03:48,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:03:48,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852967255] [2023-11-12 01:03:48,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852967255] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:03:48,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311750891] [2023-11-12 01:03:48,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:48,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:03:48,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19646d8-e265-4fc8-af2e-3e54362954d4/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:03:48,290 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19646d8-e265-4fc8-af2e-3e54362954d4/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:03:48,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19646d8-e265-4fc8-af2e-3e54362954d4/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 01:03:48,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:48,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 76 conjunts are in the unsatisfiable core [2023-11-12 01:03:48,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:03:48,762 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-12 01:03:48,762 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-12 01:03:49,820 INFO L322 Elim1Store]: treesize reduction 30, result has 53.8 percent of original size [2023-11-12 01:03:49,820 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 65 treesize of output 109 [2023-11-12 01:03:49,850 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 23 treesize of output 28 [2023-11-12 01:03:49,866 INFO L322 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-12 01:03:49,867 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 11 [2023-11-12 01:03:49,885 INFO L351 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 19 treesize of output 13 [2023-11-12 01:03:49,919 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 17 treesize of output 1 [2023-11-12 01:03:50,004 INFO L322 Elim1Store]: treesize reduction 34, result has 29.2 percent of original size [2023-11-12 01:03:50,005 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2023-11-12 01:03:50,145 INFO L322 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2023-11-12 01:03:50,145 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 68 [2023-11-12 01:03:50,205 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 01:03:50,206 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 17 [2023-11-12 01:03:50,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:03:50,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:03:51,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311750891] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:03:51,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [73570032] [2023-11-12 01:03:51,372 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-11-12 01:03:51,372 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:03:51,372 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:03:51,373 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:03:51,373 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:03:53,039 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_successful_malloc with input of size 96 for LOIs [2023-11-12 01:03:53,105 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_is_in_set with input of size 36 for LOIs [2023-11-12 01:03:53,150 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_list_add with input of size 31 for LOIs [2023-11-12 01:03:53,283 INFO L197 IcfgInterpreter]: Interpreting procedure __ldv_list_add with input of size 39 for LOIs [2023-11-12 01:03:53,297 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:03:59,293 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1478#(and (= |~#drvlist~0.offset| 0) (<= 0 (+ |ULTIMATE.start_foo_~N~0#1| 2147483648)) (<= 1 |#StackHeapBarrier|) (= |~#mutexes~0.base| 3) (= |~#mutexes~0.offset| 0) (<= |ULTIMATE.start_foo_~N~0#1| 2147483647) (= 4 |~#drvlist~0.base|) (<= 0 |ULTIMATE.start_foo_~i~0#1|))' at error location [2023-11-12 01:03:59,293 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:03:59,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 01:03:59,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2023-11-12 01:03:59,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494927778] [2023-11-12 01:03:59,294 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 01:03:59,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-12 01:03:59,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:03:59,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-12 01:03:59,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=2237, Unknown=16, NotChecked=0, Total=2450 [2023-11-12 01:03:59,297 INFO L87 Difference]: Start difference. First operand 93 states and 122 transitions. Second operand has 27 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 20 states have internal predecessors, (31), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-12 01:04:00,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 01:04:02,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 01:04:04,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 01:04:10,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:10,554 INFO L93 Difference]: Finished difference Result 248 states and 336 transitions. [2023-11-12 01:04:10,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-12 01:04:10,555 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 20 states have internal predecessors, (31), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) Word has length 25 [2023-11-12 01:04:10,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:10,557 INFO L225 Difference]: With dead ends: 248 [2023-11-12 01:04:10,558 INFO L226 Difference]: Without dead ends: 166 [2023-11-12 01:04:10,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1489 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=469, Invalid=4617, Unknown=26, NotChecked=0, Total=5112 [2023-11-12 01:04:10,561 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 222 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 113 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:10,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 251 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 614 Invalid, 10 Unknown, 0 Unchecked, 6.9s Time] [2023-11-12 01:04:10,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2023-11-12 01:04:10,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 128. [2023-11-12 01:04:10,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 92 states have (on average 1.3369565217391304) internal successors, (123), 96 states have internal predecessors, (123), 19 states have call successors, (19), 11 states have call predecessors, (19), 14 states have return successors, (26), 20 states have call predecessors, (26), 19 states have call successors, (26) [2023-11-12 01:04:10,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 168 transitions. [2023-11-12 01:04:10,593 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 168 transitions. Word has length 25 [2023-11-12 01:04:10,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:10,593 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 168 transitions. [2023-11-12 01:04:10,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 20 states have internal predecessors, (31), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-12 01:04:10,594 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 168 transitions. [2023-11-12 01:04:10,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-12 01:04:10,596 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:10,596 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:10,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19646d8-e265-4fc8-af2e-3e54362954d4/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 01:04:10,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19646d8-e265-4fc8-af2e-3e54362954d4/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:04:10,802 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:04:10,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:10,803 INFO L85 PathProgramCache]: Analyzing trace with hash -474675196, now seen corresponding path program 2 times [2023-11-12 01:04:10,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:10,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996172962] [2023-11-12 01:04:10,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:10,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:10,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:15,632 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 01:04:15,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:15,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996172962] [2023-11-12 01:04:15,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996172962] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:04:15,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183085675] [2023-11-12 01:04:15,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 01:04:15,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:04:15,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19646d8-e265-4fc8-af2e-3e54362954d4/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:04:15,634 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19646d8-e265-4fc8-af2e-3e54362954d4/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:04:15,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e19646d8-e265-4fc8-af2e-3e54362954d4/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 01:04:15,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 01:04:15,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:04:15,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 129 conjunts are in the unsatisfiable core [2023-11-12 01:04:15,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:04:16,234 INFO L322 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-12 01:04:16,235 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16