./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_two_index_04.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_two_index_04.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2 --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 707ac1569fc13aaf70722a6e3f0da30ae8a39e673c650cb4b45c765a74a9f24d --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:25:12,950 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:25:13,033 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:25:13,044 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:25:13,045 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:25:13,086 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:25:13,087 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:25:13,088 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:25:13,089 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:25:13,090 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:25:13,092 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:25:13,093 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:25:13,093 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:25:13,094 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:25:13,094 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:25:13,098 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:25:13,099 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:25:13,099 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:25:13,100 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:25:13,100 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:25:13,100 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:25:13,101 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:25:13,102 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:25:13,102 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:25:13,102 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:25:13,103 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:25:13,103 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:25:13,104 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:25:13,104 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:25:13,105 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:25:13,105 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:25:13,105 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:25:13,106 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:25:13,106 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:25:13,106 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:25:13,107 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:25:13,107 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:25:13,109 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:25:13,109 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:25:13,110 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:25:13,110 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:25:13,111 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:25:13,111 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:25:13,111 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:25:13,111 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:25:13,112 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:25:13,112 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:25:13,113 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_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 707ac1569fc13aaf70722a6e3f0da30ae8a39e673c650cb4b45c765a74a9f24d [2024-11-02 12:25:13,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:25:13,520 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:25:13,529 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:25:13,531 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:25:13,531 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:25:13,533 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/array-examples/standard_two_index_04.i Unable to find full path for "g++" [2024-11-02 12:25:15,877 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:25:16,081 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:25:16,081 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/sv-benchmarks/c/array-examples/standard_two_index_04.i [2024-11-02 12:25:16,090 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/data/4020d75cd/797b3d083a9f47ad9a332c6364aaacfe/FLAGddebccdb3 [2024-11-02 12:25:16,110 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/data/4020d75cd/797b3d083a9f47ad9a332c6364aaacfe [2024-11-02 12:25:16,115 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:25:16,118 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:25:16,121 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:25:16,122 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:25:16,128 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:25:16,129 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:25:16" (1/1) ... [2024-11-02 12:25:16,130 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@304cdcc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:25:16, skipping insertion in model container [2024-11-02 12:25:16,130 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:25:16" (1/1) ... [2024-11-02 12:25:16,156 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:25:16,364 WARN L251 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_081fcf82-b339-4ad1-ac93-d885f4abea58/sv-benchmarks/c/array-examples/standard_two_index_04.i[814,827] [2024-11-02 12:25:16,385 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:25:16,395 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:25:16,408 WARN L251 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_081fcf82-b339-4ad1-ac93-d885f4abea58/sv-benchmarks/c/array-examples/standard_two_index_04.i[814,827] [2024-11-02 12:25:16,421 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:25:16,445 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:25:16,445 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:25:16 WrapperNode [2024-11-02 12:25:16,446 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:25:16,447 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:25:16,447 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:25:16,447 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:25:16,454 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:25:16" (1/1) ... [2024-11-02 12:25:16,462 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:25:16" (1/1) ... [2024-11-02 12:25:16,481 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2024-11-02 12:25:16,482 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:25:16,482 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:25:16,485 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:25:16,485 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:25:16,494 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:25:16" (1/1) ... [2024-11-02 12:25:16,494 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:25:16" (1/1) ... [2024-11-02 12:25:16,497 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:25:16" (1/1) ... [2024-11-02 12:25:16,498 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:25:16" (1/1) ... [2024-11-02 12:25:16,507 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:25:16" (1/1) ... [2024-11-02 12:25:16,512 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:25:16" (1/1) ... [2024-11-02 12:25:16,513 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:25:16" (1/1) ... [2024-11-02 12:25:16,514 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:25:16" (1/1) ... [2024-11-02 12:25:16,517 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:25:16,519 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:25:16,521 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:25:16,521 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:25:16,522 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:25:16" (1/1) ... [2024-11-02 12:25:16,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:25:16,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:25:16,555 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:25:16,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:25:16,592 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:25:16,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:25:16,592 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-02 12:25:16,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-02 12:25:16,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:25:16,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:25:16,595 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-02 12:25:16,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-02 12:25:16,674 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:25:16,676 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:25:16,831 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-11-02 12:25:16,831 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:25:16,866 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:25:16,866 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-02 12:25:16,866 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:25:16 BoogieIcfgContainer [2024-11-02 12:25:16,867 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:25:16,870 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:25:16,870 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:25:16,873 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:25:16,874 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:25:16" (1/3) ... [2024-11-02 12:25:16,875 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3afd9aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:25:16, skipping insertion in model container [2024-11-02 12:25:16,875 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:25:16" (2/3) ... [2024-11-02 12:25:16,875 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3afd9aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:25:16, skipping insertion in model container [2024-11-02 12:25:16,876 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:25:16" (3/3) ... [2024-11-02 12:25:16,877 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_two_index_04.i [2024-11-02 12:25:16,896 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:25:16,896 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 12:25:16,957 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:25:16,964 INFO L333 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, 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;@530d0091, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:25:16,965 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 12:25:16,973 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:25:16,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-02 12:25:16,979 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:25:16,980 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-02 12:25:16,980 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:25:16,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:25:16,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1747889330, now seen corresponding path program 1 times [2024-11-02 12:25:16,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:25:17,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822900032] [2024-11-02 12:25:17,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:25:17,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:25:17,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:25:17,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:25:17,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:25:17,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822900032] [2024-11-02 12:25:17,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822900032] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:25:17,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:25:17,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:25:17,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931343507] [2024-11-02 12:25:17,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:25:17,237 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:25:17,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:25:17,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:25:17,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:25:17,268 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 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) [2024-11-02 12:25:17,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:25:17,323 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2024-11-02 12:25:17,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:25:17,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 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 [2024-11-02 12:25:17,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:25:17,334 INFO L225 Difference]: With dead ends: 17 [2024-11-02 12:25:17,334 INFO L226 Difference]: Without dead ends: 9 [2024-11-02 12:25:17,349 INFO L431 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 [2024-11-02 12:25:17,356 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:25:17,360 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:25:17,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2024-11-02 12:25:17,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2024-11-02 12:25:17,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 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) [2024-11-02 12:25:17,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2024-11-02 12:25:17,412 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2024-11-02 12:25:17,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:25:17,413 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2024-11-02 12:25:17,414 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 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) [2024-11-02 12:25:17,414 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2024-11-02 12:25:17,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-02 12:25:17,415 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:25:17,415 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:25:17,416 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:25:17,416 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:25:17,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:25:17,418 INFO L85 PathProgramCache]: Analyzing trace with hash 274671409, now seen corresponding path program 1 times [2024-11-02 12:25:17,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:25:17,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627950237] [2024-11-02 12:25:17,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:25:17,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:25:17,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:25:17,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:25:17,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:25:17,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627950237] [2024-11-02 12:25:17,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627950237] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:25:17,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139812604] [2024-11-02 12:25:17,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:25:17,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:25:17,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:25:17,590 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:25:17,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:25:17,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:25:17,687 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-02 12:25:17,692 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:25:17,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:25:17,711 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:25:17,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139812604] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:25:17,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:25:17,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2024-11-02 12:25:17,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302579006] [2024-11-02 12:25:17,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:25:17,715 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:25:17,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:25:17,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:25:17,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:25:17,718 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:25:17,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:25:17,765 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2024-11-02 12:25:17,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:25:17,766 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-02 12:25:17,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:25:17,767 INFO L225 Difference]: With dead ends: 20 [2024-11-02 12:25:17,767 INFO L226 Difference]: Without dead ends: 15 [2024-11-02 12:25:17,768 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:25:17,769 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:25:17,770 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:25:17,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-11-02 12:25:17,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 10. [2024-11-02 12:25:17,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:25:17,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2024-11-02 12:25:17,778 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2024-11-02 12:25:17,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:25:17,778 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2024-11-02 12:25:17,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:25:17,779 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2024-11-02 12:25:17,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-02 12:25:17,780 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:25:17,781 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:25:17,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-02 12:25:17,985 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:25:17,985 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:25:17,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:25:17,986 INFO L85 PathProgramCache]: Analyzing trace with hash -108579109, now seen corresponding path program 1 times [2024-11-02 12:25:17,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:25:17,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400053081] [2024-11-02 12:25:17,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:25:17,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:25:18,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:25:18,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:25:18,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:25:18,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400053081] [2024-11-02 12:25:18,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400053081] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:25:18,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668166662] [2024-11-02 12:25:18,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:25:18,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:25:18,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:25:18,134 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:25:18,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:25:18,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:25:18,223 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-02 12:25:18,224 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:25:18,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:25:18,259 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:25:18,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:25:18,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668166662] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:25:18,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [647769521] [2024-11-02 12:25:18,308 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-02 12:25:18,308 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:25:18,312 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:25:18,318 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:25:18,319 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:25:19,156 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:25:19,368 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '166#(and (<= 1 |#StackHeapBarrier|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 4) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0))) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-02 12:25:19,368 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:25:19,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:25:19,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-02 12:25:19,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314877884] [2024-11-02 12:25:19,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:25:19,370 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-02 12:25:19,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:25:19,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-02 12:25:19,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2024-11-02 12:25:19,372 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 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) [2024-11-02 12:25:19,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:25:19,425 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2024-11-02 12:25:19,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 12:25:19,426 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 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 8 [2024-11-02 12:25:19,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:25:19,427 INFO L225 Difference]: With dead ends: 31 [2024-11-02 12:25:19,427 INFO L226 Difference]: Without dead ends: 24 [2024-11-02 12:25:19,427 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2024-11-02 12:25:19,429 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:25:19,429 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 12 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:25:19,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-02 12:25:19,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 14. [2024-11-02 12:25:19,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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) [2024-11-02 12:25:19,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2024-11-02 12:25:19,438 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2024-11-02 12:25:19,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:25:19,438 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2024-11-02 12:25:19,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 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) [2024-11-02 12:25:19,439 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2024-11-02 12:25:19,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-02 12:25:19,439 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:25:19,439 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2024-11-02 12:25:19,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-02 12:25:19,640 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:25:19,641 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:25:19,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:25:19,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1284839922, now seen corresponding path program 2 times [2024-11-02 12:25:19,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:25:19,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236166323] [2024-11-02 12:25:19,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:25:19,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:25:19,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:25:19,867 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-02 12:25:19,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:25:19,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236166323] [2024-11-02 12:25:19,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236166323] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:25:19,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622397102] [2024-11-02 12:25:19,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 12:25:19,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:25:19,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:25:19,873 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:25:19,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 12:25:19,968 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-02 12:25:19,968 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:25:19,969 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-02 12:25:19,971 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:25:19,988 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-02 12:25:19,988 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:25:20,032 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-02 12:25:20,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622397102] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:25:20,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [358738556] [2024-11-02 12:25:20,035 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-02 12:25:20,036 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:25:20,036 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:25:20,036 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:25:20,037 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:25:20,414 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:25:20,647 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '314#(and (<= 1 |#StackHeapBarrier|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 4) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0))) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-02 12:25:20,648 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:25:20,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:25:20,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-11-02 12:25:20,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094595639] [2024-11-02 12:25:20,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:25:20,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-02 12:25:20,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:25:20,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-02 12:25:20,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2024-11-02 12:25:20,653 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:25:20,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:25:20,768 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2024-11-02 12:25:20,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-02 12:25:20,769 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-02 12:25:20,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:25:20,770 INFO L225 Difference]: With dead ends: 54 [2024-11-02 12:25:20,770 INFO L226 Difference]: Without dead ends: 46 [2024-11-02 12:25:20,771 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2024-11-02 12:25:20,772 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 40 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:25:20,775 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 21 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:25:20,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-02 12:25:20,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 20. [2024-11-02 12:25:20,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 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) [2024-11-02 12:25:20,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2024-11-02 12:25:20,786 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2024-11-02 12:25:20,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:25:20,786 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2024-11-02 12:25:20,787 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:25:20,787 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2024-11-02 12:25:20,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-02 12:25:20,789 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:25:20,789 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2024-11-02 12:25:20,814 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-02 12:25:20,992 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:25:20,993 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:25:20,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:25:20,993 INFO L85 PathProgramCache]: Analyzing trace with hash 376721006, now seen corresponding path program 3 times [2024-11-02 12:25:20,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:25:20,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631631084] [2024-11-02 12:25:20,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:25:20,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:25:21,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:25:21,290 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-02 12:25:21,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:25:21,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631631084] [2024-11-02 12:25:21,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631631084] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:25:21,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982083213] [2024-11-02 12:25:21,292 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-02 12:25:21,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:25:21,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:25:21,298 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:25:21,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-02 12:25:21,390 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-02 12:25:21,391 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:25:21,392 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-02 12:25:21,394 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:25:21,456 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-02 12:25:21,456 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:25:21,604 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-02 12:25:21,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982083213] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:25:21,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1956027007] [2024-11-02 12:25:21,606 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-02 12:25:21,606 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:25:21,607 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:25:21,607 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:25:21,609 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:25:21,861 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:25:22,118 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '557#(and (<= 1 |#StackHeapBarrier|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 4) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0))) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-02 12:25:22,118 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:25:22,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:25:22,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2024-11-02 12:25:22,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554140689] [2024-11-02 12:25:22,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:25:22,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-02 12:25:22,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:25:22,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-02 12:25:22,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2024-11-02 12:25:22,122 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 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) [2024-11-02 12:25:22,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:25:22,334 INFO L93 Difference]: Finished difference Result 93 states and 112 transitions. [2024-11-02 12:25:22,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-02 12:25:22,336 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 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 18 [2024-11-02 12:25:22,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:25:22,338 INFO L225 Difference]: With dead ends: 93 [2024-11-02 12:25:22,338 INFO L226 Difference]: Without dead ends: 81 [2024-11-02 12:25:22,339 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2024-11-02 12:25:22,340 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 99 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:25:22,340 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 45 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:25:22,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-02 12:25:22,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 36. [2024-11-02 12:25:22,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 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) [2024-11-02 12:25:22,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2024-11-02 12:25:22,348 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 18 [2024-11-02 12:25:22,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:25:22,348 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2024-11-02 12:25:22,349 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 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) [2024-11-02 12:25:22,349 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2024-11-02 12:25:22,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-02 12:25:22,350 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:25:22,350 INFO L215 NwaCegarLoop]: trace histogram [19, 9, 1, 1, 1, 1, 1, 1] [2024-11-02 12:25:22,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-02 12:25:22,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:25:22,551 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:25:22,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:25:22,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1462949573, now seen corresponding path program 4 times [2024-11-02 12:25:22,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:25:22,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269865695] [2024-11-02 12:25:22,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:25:22,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:25:22,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:25:22,971 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-02 12:25:22,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:25:22,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269865695] [2024-11-02 12:25:22,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269865695] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:25:22,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755444698] [2024-11-02 12:25:22,972 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-02 12:25:22,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:25:22,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:25:22,975 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:25:22,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-02 12:25:23,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:25:23,134 INFO L255 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-02 12:25:23,137 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:25:23,354 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-02 12:25:23,354 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:25:24,030 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-02 12:25:24,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755444698] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:25:24,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [503249564] [2024-11-02 12:25:24,036 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-02 12:25:24,036 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:25:24,037 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:25:24,037 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:25:24,037 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:25:24,250 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:25:24,436 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1016#(and (<= 1 |#StackHeapBarrier|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 4) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0))) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-02 12:25:24,436 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:25:24,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:25:24,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 21, 21] total 48 [2024-11-02 12:25:24,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902074100] [2024-11-02 12:25:24,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:25:24,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-02 12:25:24,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:25:24,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-02 12:25:24,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1280, Invalid=1476, Unknown=0, NotChecked=0, Total=2756 [2024-11-02 12:25:24,443 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 48 states, 48 states have (on average 1.25) internal successors, (60), 48 states have internal predecessors, (60), 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) [2024-11-02 12:25:24,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:25:24,796 INFO L93 Difference]: Finished difference Result 158 states and 193 transitions. [2024-11-02 12:25:24,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-02 12:25:24,797 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.25) internal successors, (60), 48 states have internal predecessors, (60), 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 34 [2024-11-02 12:25:24,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:25:24,798 INFO L225 Difference]: With dead ends: 158 [2024-11-02 12:25:24,799 INFO L226 Difference]: Without dead ends: 143 [2024-11-02 12:25:24,800 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1472 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1280, Invalid=1476, Unknown=0, NotChecked=0, Total=2756 [2024-11-02 12:25:24,801 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 211 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 12:25:24,801 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 105 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 12:25:24,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-11-02 12:25:24,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 68. [2024-11-02 12:25:24,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 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) [2024-11-02 12:25:24,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2024-11-02 12:25:24,811 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 34 [2024-11-02 12:25:24,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:25:24,812 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2024-11-02 12:25:24,812 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.25) internal successors, (60), 48 states have internal predecessors, (60), 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) [2024-11-02 12:25:24,812 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2024-11-02 12:25:24,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-02 12:25:24,819 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:25:24,819 INFO L215 NwaCegarLoop]: trace histogram [45, 15, 1, 1, 1, 1, 1, 1] [2024-11-02 12:25:24,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-02 12:25:25,019 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-02 12:25:25,020 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:25:25,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:25:25,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1022184869, now seen corresponding path program 5 times [2024-11-02 12:25:25,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:25:25,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024605005] [2024-11-02 12:25:25,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:25:25,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:25:25,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:25:25,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2024-11-02 12:25:25,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:25:25,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024605005] [2024-11-02 12:25:25,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024605005] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:25:25,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299738431] [2024-11-02 12:25:25,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 12:25:25,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:25:25,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:25:25,921 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:25:25,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-02 12:25:29,346 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-02 12:25:29,346 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:25:29,357 INFO L255 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-02 12:25:29,367 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:25:29,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2024-11-02 12:25:29,439 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:25:30,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2024-11-02 12:25:30,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299738431] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:25:30,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1884521332] [2024-11-02 12:25:30,076 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-02 12:25:30,077 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:25:30,078 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:25:30,079 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:25:30,079 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:25:30,345 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:25:30,600 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1824#(and (<= 1 |#StackHeapBarrier|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 4) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0))) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-02 12:25:30,600 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:25:30,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:25:30,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2024-11-02 12:25:30,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468792870] [2024-11-02 12:25:30,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:25:30,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-02 12:25:30,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:25:30,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-02 12:25:30,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=712, Invalid=848, Unknown=0, NotChecked=0, Total=1560 [2024-11-02 12:25:30,603 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 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) [2024-11-02 12:25:31,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:25:31,199 INFO L93 Difference]: Finished difference Result 246 states and 265 transitions. [2024-11-02 12:25:31,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-02 12:25:31,200 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 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 66 [2024-11-02 12:25:31,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:25:31,202 INFO L225 Difference]: With dead ends: 246 [2024-11-02 12:25:31,202 INFO L226 Difference]: Without dead ends: 241 [2024-11-02 12:25:31,203 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=712, Invalid=848, Unknown=0, NotChecked=0, Total=1560 [2024-11-02 12:25:31,204 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 408 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-02 12:25:31,205 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 99 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-02 12:25:31,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2024-11-02 12:25:31,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 85. [2024-11-02 12:25:31,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 84 states have internal predecessors, (87), 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) [2024-11-02 12:25:31,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2024-11-02 12:25:31,222 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 66 [2024-11-02 12:25:31,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:25:31,222 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2024-11-02 12:25:31,223 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 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) [2024-11-02 12:25:31,223 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2024-11-02 12:25:31,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-02 12:25:31,226 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:25:31,226 INFO L215 NwaCegarLoop]: trace histogram [45, 32, 1, 1, 1, 1, 1, 1] [2024-11-02 12:25:31,252 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-02 12:25:31,429 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-02 12:25:31,430 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:25:31,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:25:31,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1816102159, now seen corresponding path program 6 times [2024-11-02 12:25:31,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:25:31,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11236397] [2024-11-02 12:25:31,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:25:31,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:25:31,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:25:33,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1563 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2024-11-02 12:25:33,716 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:25:33,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11236397] [2024-11-02 12:25:33,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11236397] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:25:33,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242707153] [2024-11-02 12:25:33,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-02 12:25:33,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:25:33,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:25:33,719 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:25:33,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-02 12:25:34,050 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-02 12:25:34,051 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:25:34,056 INFO L255 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-02 12:25:34,065 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:25:34,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1563 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2024-11-02 12:25:34,651 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:25:38,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1563 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2024-11-02 12:25:38,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242707153] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:25:38,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [582005441] [2024-11-02 12:25:38,213 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-02 12:25:38,214 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:25:38,214 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:25:38,214 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:25:38,215 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:25:38,442 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:25:38,749 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2961#(and (<= 1 |#StackHeapBarrier|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 4) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0))) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-02 12:25:38,749 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:25:38,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:25:38,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 47, 47] total 116 [2024-11-02 12:25:38,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693457162] [2024-11-02 12:25:38,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:25:38,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2024-11-02 12:25:38,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:25:38,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2024-11-02 12:25:38,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7026, Invalid=7494, Unknown=0, NotChecked=0, Total=14520 [2024-11-02 12:25:38,766 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand has 116 states, 116 states have (on average 1.1637931034482758) internal successors, (135), 116 states have internal predecessors, (135), 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) [2024-11-02 12:25:40,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:25:40,659 INFO L93 Difference]: Finished difference Result 429 states and 513 transitions. [2024-11-02 12:25:40,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2024-11-02 12:25:40,661 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.1637931034482758) internal successors, (135), 116 states have internal predecessors, (135), 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 83 [2024-11-02 12:25:40,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:25:40,663 INFO L225 Difference]: With dead ends: 429 [2024-11-02 12:25:40,663 INFO L226 Difference]: Without dead ends: 391 [2024-11-02 12:25:40,671 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7232 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=7026, Invalid=7494, Unknown=0, NotChecked=0, Total=14520 [2024-11-02 12:25:40,674 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 963 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 963 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-02 12:25:40,677 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [963 Valid, 201 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-02 12:25:40,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2024-11-02 12:25:40,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 166. [2024-11-02 12:25:40,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.018181818181818) internal successors, (168), 165 states have internal predecessors, (168), 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) [2024-11-02 12:25:40,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2024-11-02 12:25:40,699 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 83 [2024-11-02 12:25:40,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:25:40,700 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2024-11-02 12:25:40,700 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.1637931034482758) internal successors, (135), 116 states have internal predecessors, (135), 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) [2024-11-02 12:25:40,700 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2024-11-02 12:25:40,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2024-11-02 12:25:40,702 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:25:40,707 INFO L215 NwaCegarLoop]: trace histogram [113, 45, 1, 1, 1, 1, 1, 1] [2024-11-02 12:25:40,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-02 12:25:40,908 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:25:40,908 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:25:40,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:25:40,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1347475547, now seen corresponding path program 7 times [2024-11-02 12:25:40,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:25:40,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743318325] [2024-11-02 12:25:40,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:25:40,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:25:41,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:25:44,629 INFO L134 CoverageAnalysis]: Checked inductivity of 7476 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 6441 trivial. 0 not checked. [2024-11-02 12:25:44,629 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:25:44,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743318325] [2024-11-02 12:25:44,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743318325] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:25:44,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94432991] [2024-11-02 12:25:44,630 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-02 12:25:44,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:25:44,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:25:44,632 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:25:44,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_081fcf82-b339-4ad1-ac93-d885f4abea58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-02 12:25:45,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:25:45,130 INFO L255 TraceCheckSpWp]: Trace formula consists of 1485 conjuncts, 115 conjuncts are in the unsatisfiable core [2024-11-02 12:25:45,144 INFO L278 TraceCheckSpWp]: Computing forward predicates...