./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/sanfoundry_27_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/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_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/sanfoundry_27_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/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_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/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 40b578d2ddf68a49bc52037a6e4860a392bad1b49fc77d85682d536447864a03 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 11:26:10,656 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 11:26:10,746 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 11:26:10,751 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 11:26:10,751 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 11:26:10,771 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 11:26:10,772 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 11:26:10,772 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 11:26:10,773 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 11:26:10,773 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 11:26:10,774 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 11:26:10,774 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 11:26:10,775 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 11:26:10,775 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 11:26:10,775 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 11:26:10,776 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 11:26:10,776 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 11:26:10,777 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 11:26:10,777 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 11:26:10,777 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 11:26:10,778 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 11:26:10,778 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 11:26:10,779 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 11:26:10,779 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 11:26:10,780 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 11:26:10,780 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 11:26:10,784 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 11:26:10,784 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 11:26:10,785 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 11:26:10,785 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 11:26:10,785 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 11:26:10,785 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 11:26:10,786 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 11:26:10,786 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 11:26:10,786 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 11:26:10,787 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 11:26:10,787 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 11:26:10,787 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 11:26:10,787 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:26:10,788 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 11:26:10,788 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 11:26:10,789 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 11:26:10,789 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 11:26:10,789 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 11:26:10,790 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 11:26:10,791 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 11:26:10,791 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 11:26:10,791 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_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 40b578d2ddf68a49bc52037a6e4860a392bad1b49fc77d85682d536447864a03 [2024-11-02 11:26:11,098 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 11:26:11,126 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 11:26:11,131 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 11:26:11,134 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 11:26:11,134 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 11:26:11,136 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/array-examples/sanfoundry_27_ground.i Unable to find full path for "g++" [2024-11-02 11:26:13,270 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 11:26:13,540 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 11:26:13,541 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/sv-benchmarks/c/array-examples/sanfoundry_27_ground.i [2024-11-02 11:26:13,550 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/bin/utaipan-verify-DbMuA5NWw2/data/e50fb79b0/8f53ff8ca5d64b3d99b5f8d2c57e1ddc/FLAGcdf0fd3c8 [2024-11-02 11:26:13,572 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/bin/utaipan-verify-DbMuA5NWw2/data/e50fb79b0/8f53ff8ca5d64b3d99b5f8d2c57e1ddc [2024-11-02 11:26:13,575 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 11:26:13,577 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 11:26:13,578 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 11:26:13,579 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 11:26:13,586 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 11:26:13,587 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:26:13" (1/1) ... [2024-11-02 11:26:13,588 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42094b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:13, skipping insertion in model container [2024-11-02 11:26:13,588 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:26:13" (1/1) ... [2024-11-02 11:26:13,612 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 11:26:13,912 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_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/sv-benchmarks/c/array-examples/sanfoundry_27_ground.i[813,826] [2024-11-02 11:26:13,946 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:26:13,960 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 11:26:13,978 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_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/sv-benchmarks/c/array-examples/sanfoundry_27_ground.i[813,826] [2024-11-02 11:26:13,994 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:26:14,020 INFO L204 MainTranslator]: Completed translation [2024-11-02 11:26:14,021 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:14 WrapperNode [2024-11-02 11:26:14,022 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 11:26:14,023 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 11:26:14,023 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 11:26:14,024 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 11:26:14,034 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:14" (1/1) ... [2024-11-02 11:26:14,041 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:14" (1/1) ... [2024-11-02 11:26:14,064 INFO L138 Inliner]: procedures = 16, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 62 [2024-11-02 11:26:14,065 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 11:26:14,065 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 11:26:14,066 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 11:26:14,066 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 11:26:14,079 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:14" (1/1) ... [2024-11-02 11:26:14,081 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:14" (1/1) ... [2024-11-02 11:26:14,084 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:14" (1/1) ... [2024-11-02 11:26:14,086 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:14" (1/1) ... [2024-11-02 11:26:14,096 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:14" (1/1) ... [2024-11-02 11:26:14,104 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:14" (1/1) ... [2024-11-02 11:26:14,106 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:14" (1/1) ... [2024-11-02 11:26:14,107 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:14" (1/1) ... [2024-11-02 11:26:14,109 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 11:26:14,110 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 11:26:14,111 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 11:26:14,111 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 11:26:14,116 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:14" (1/1) ... [2024-11-02 11:26:14,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:26:14,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:26:14,165 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 11:26:14,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 11:26:14,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 11:26:14,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 11:26:14,213 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-02 11:26:14,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-02 11:26:14,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 11:26:14,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 11:26:14,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-02 11:26:14,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-02 11:26:14,322 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 11:26:14,328 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 11:26:14,587 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-11-02 11:26:14,587 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 11:26:14,689 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 11:26:14,693 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-02 11:26:14,693 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:26:14 BoogieIcfgContainer [2024-11-02 11:26:14,694 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 11:26:14,696 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 11:26:14,698 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 11:26:14,703 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 11:26:14,704 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:26:13" (1/3) ... [2024-11-02 11:26:14,705 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@456044c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:26:14, skipping insertion in model container [2024-11-02 11:26:14,705 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:14" (2/3) ... [2024-11-02 11:26:14,705 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@456044c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:26:14, skipping insertion in model container [2024-11-02 11:26:14,706 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:26:14" (3/3) ... [2024-11-02 11:26:14,707 INFO L112 eAbstractionObserver]: Analyzing ICFG sanfoundry_27_ground.i [2024-11-02 11:26:14,731 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 11:26:14,731 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 11:26:14,819 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 11:26:14,828 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;@30b77f9e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 11:26:14,829 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 11:26:14,834 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 11:26:14,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-02 11:26:14,843 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:26:14,844 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-02 11:26:14,845 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:26:14,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:26:14,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1507321047, now seen corresponding path program 1 times [2024-11-02 11:26:14,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:26:14,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548979317] [2024-11-02 11:26:14,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:14,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:26:15,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:15,113 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 11:26:15,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:26:15,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548979317] [2024-11-02 11:26:15,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548979317] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:26:15,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:26:15,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 11:26:15,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118183319] [2024-11-02 11:26:15,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:26:15,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:26:15,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:26:15,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:26:15,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:26:15,157 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 11:26:15,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:26:15,215 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2024-11-02 11:26:15,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:26:15,219 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 11:26:15,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:26:15,228 INFO L225 Difference]: With dead ends: 17 [2024-11-02 11:26:15,228 INFO L226 Difference]: Without dead ends: 9 [2024-11-02 11:26:15,231 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 11:26:15,236 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 11:26:15,237 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 11:26:15,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2024-11-02 11:26:15,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2024-11-02 11:26:15,270 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 11:26:15,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2024-11-02 11:26:15,273 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2024-11-02 11:26:15,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:26:15,274 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2024-11-02 11:26:15,274 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 11:26:15,275 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2024-11-02 11:26:15,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-02 11:26:15,276 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:26:15,277 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:26:15,277 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 11:26:15,278 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:26:15,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:26:15,279 INFO L85 PathProgramCache]: Analyzing trace with hash 399533796, now seen corresponding path program 1 times [2024-11-02 11:26:15,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:26:15,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750662765] [2024-11-02 11:26:15,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:15,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:26:15,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:15,408 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 11:26:15,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:26:15,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750662765] [2024-11-02 11:26:15,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750662765] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:26:15,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263267537] [2024-11-02 11:26:15,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:15,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:26:15,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:26:15,412 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:26:15,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 11:26:15,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:15,508 INFO L255 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-02 11:26:15,514 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:26:15,533 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 11:26:15,533 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 11:26:15,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263267537] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:26:15,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 11:26:15,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2024-11-02 11:26:15,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486527078] [2024-11-02 11:26:15,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:26:15,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:26:15,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:26:15,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:26:15,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 11:26:15,539 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 11:26:15,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:26:15,569 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2024-11-02 11:26:15,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:26:15,569 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 11:26:15,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:26:15,570 INFO L225 Difference]: With dead ends: 15 [2024-11-02 11:26:15,570 INFO L226 Difference]: Without dead ends: 10 [2024-11-02 11:26:15,571 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 11:26:15,572 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 11:26:15,572 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 11:26:15,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2024-11-02 11:26:15,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2024-11-02 11:26:15,580 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 11:26:15,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2024-11-02 11:26:15,581 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2024-11-02 11:26:15,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:26:15,582 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2024-11-02 11:26:15,582 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 11:26:15,582 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2024-11-02 11:26:15,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-02 11:26:15,583 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:26:15,583 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:26:15,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-02 11:26:15,788 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:26:15,789 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:26:15,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:26:15,790 INFO L85 PathProgramCache]: Analyzing trace with hash -500221048, now seen corresponding path program 1 times [2024-11-02 11:26:15,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:26:15,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433336530] [2024-11-02 11:26:15,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:15,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:26:15,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:15,936 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 11:26:15,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:26:15,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433336530] [2024-11-02 11:26:15,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433336530] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:26:15,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487214242] [2024-11-02 11:26:15,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:15,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:26:15,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:26:15,942 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:26:15,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 11:26:16,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:16,026 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-02 11:26:16,027 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:26:16,063 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 11:26:16,064 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 11:26:16,099 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 11:26:16,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487214242] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 11:26:16,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [22909727] [2024-11-02 11:26:16,122 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-02 11:26:16,122 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 11:26:16,127 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 11:26:16,136 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 11:26:16,136 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 11:26:16,605 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 11:26:16,736 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '160#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 2 |ULTIMATE.start_main_~#array~0#1.base|) (<= (+ |ULTIMATE.start_main_~largest~0#1| 1) (select (select |#memory_int| |ULTIMATE.start_main_~#array~0#1.base|) 0)))' at error location [2024-11-02 11:26:16,736 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 11:26:16,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 11:26:16,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-02 11:26:16,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919827350] [2024-11-02 11:26:16,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 11:26:16,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-02 11:26:16,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:26:16,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-02 11:26:16,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-11-02 11:26:16,740 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 11:26:16,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:26:16,807 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2024-11-02 11:26:16,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 11:26:16,807 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 11:26:16,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:26:16,808 INFO L225 Difference]: With dead ends: 22 [2024-11-02 11:26:16,808 INFO L226 Difference]: Without dead ends: 15 [2024-11-02 11:26:16,809 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-11-02 11:26:16,810 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:26:16,811 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:26:16,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-11-02 11:26:16,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-11-02 11:26:16,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:26:16,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2024-11-02 11:26:16,823 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 8 [2024-11-02 11:26:16,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:26:16,824 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2024-11-02 11:26:16,824 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 11:26:16,824 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2024-11-02 11:26:16,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-02 11:26:16,825 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:26:16,825 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1] [2024-11-02 11:26:16,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-02 11:26:17,026 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:26:17,026 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:26:17,027 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:26:17,027 INFO L85 PathProgramCache]: Analyzing trace with hash -677948957, now seen corresponding path program 2 times [2024-11-02 11:26:17,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:26:17,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484198542] [2024-11-02 11:26:17,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:17,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:26:17,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:17,346 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-02 11:26:17,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:26:17,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484198542] [2024-11-02 11:26:17,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484198542] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:26:17,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506515162] [2024-11-02 11:26:17,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 11:26:17,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:26:17,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:26:17,353 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:26:17,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 11:26:17,457 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-02 11:26:17,457 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 11:26:17,461 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-02 11:26:17,463 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:26:17,499 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-02 11:26:17,499 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 11:26:17,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-02 11:26:17,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506515162] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 11:26:17,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1878947683] [2024-11-02 11:26:17,596 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-02 11:26:17,597 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 11:26:17,599 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 11:26:17,599 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 11:26:17,600 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 11:26:17,864 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 11:26:18,005 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '310#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 2 |ULTIMATE.start_main_~#array~0#1.base|) (<= (+ |ULTIMATE.start_main_~largest~0#1| 1) (select (select |#memory_int| |ULTIMATE.start_main_~#array~0#1.base|) 0)))' at error location [2024-11-02 11:26:18,005 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 11:26:18,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 11:26:18,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-02 11:26:18,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291860833] [2024-11-02 11:26:18,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 11:26:18,007 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-02 11:26:18,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:26:18,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-02 11:26:18,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2024-11-02 11:26:18,012 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 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 11:26:18,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:26:18,127 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2024-11-02 11:26:18,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-02 11:26:18,127 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-02 11:26:18,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:26:18,128 INFO L225 Difference]: With dead ends: 36 [2024-11-02 11:26:18,128 INFO L226 Difference]: Without dead ends: 27 [2024-11-02 11:26:18,129 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2024-11-02 11:26:18,130 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:26:18,131 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:26:18,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-02 11:26:18,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-02 11:26:18,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 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 11:26:18,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2024-11-02 11:26:18,140 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 13 [2024-11-02 11:26:18,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:26:18,140 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2024-11-02 11:26:18,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 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 11:26:18,141 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2024-11-02 11:26:18,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-02 11:26:18,142 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:26:18,142 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1] [2024-11-02 11:26:18,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-02 11:26:18,342 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:26:18,343 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:26:18,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:26:18,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1534866941, now seen corresponding path program 3 times [2024-11-02 11:26:18,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:26:18,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590049199] [2024-11-02 11:26:18,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:18,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:26:18,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:18,854 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-02 11:26:18,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:26:18,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590049199] [2024-11-02 11:26:18,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590049199] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:26:18,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160735278] [2024-11-02 11:26:18,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-02 11:26:18,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:26:18,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:26:18,863 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:26:18,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-02 11:26:19,006 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-02 11:26:19,006 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 11:26:19,010 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-02 11:26:19,012 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:26:19,066 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-02 11:26:19,069 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 11:26:19,446 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-02 11:26:19,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160735278] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 11:26:19,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [405413905] [2024-11-02 11:26:19,449 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-02 11:26:19,450 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 11:26:19,450 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 11:26:19,450 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 11:26:19,450 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 11:26:19,620 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 11:26:19,776 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '596#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 2 |ULTIMATE.start_main_~#array~0#1.base|) (<= (+ |ULTIMATE.start_main_~largest~0#1| 1) (select (select |#memory_int| |ULTIMATE.start_main_~#array~0#1.base|) 0)))' at error location [2024-11-02 11:26:19,777 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 11:26:19,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 11:26:19,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2024-11-02 11:26:19,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413068151] [2024-11-02 11:26:19,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 11:26:19,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-02 11:26:19,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:26:19,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-02 11:26:19,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=557, Unknown=0, NotChecked=0, Total=870 [2024-11-02 11:26:19,781 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 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 11:26:19,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:26:19,983 INFO L93 Difference]: Finished difference Result 66 states and 93 transitions. [2024-11-02 11:26:19,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-02 11:26:19,984 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 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 25 [2024-11-02 11:26:19,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:26:19,986 INFO L225 Difference]: With dead ends: 66 [2024-11-02 11:26:19,986 INFO L226 Difference]: Without dead ends: 51 [2024-11-02 11:26:19,987 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=313, Invalid=557, Unknown=0, NotChecked=0, Total=870 [2024-11-02 11:26:19,988 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 11:26:19,991 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 11:26:19,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-02 11:26:20,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-11-02 11:26:20,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.06) internal successors, (53), 50 states have internal predecessors, (53), 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 11:26:20,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2024-11-02 11:26:20,009 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 25 [2024-11-02 11:26:20,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:26:20,010 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2024-11-02 11:26:20,010 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 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 11:26:20,010 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2024-11-02 11:26:20,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-02 11:26:20,011 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:26:20,012 INFO L215 NwaCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1] [2024-11-02 11:26:20,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-02 11:26:20,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:26:20,213 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:26:20,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:26:20,213 INFO L85 PathProgramCache]: Analyzing trace with hash -193625533, now seen corresponding path program 4 times [2024-11-02 11:26:20,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:26:20,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919082513] [2024-11-02 11:26:20,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:20,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:26:20,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:21,329 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-11-02 11:26:21,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:26:21,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919082513] [2024-11-02 11:26:21,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919082513] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:26:21,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768827173] [2024-11-02 11:26:21,331 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-02 11:26:21,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:26:21,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:26:21,334 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:26:21,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-02 11:26:21,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:21,524 INFO L255 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-02 11:26:21,528 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:26:21,618 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-11-02 11:26:21,619 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 11:26:22,758 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-11-02 11:26:22,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768827173] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 11:26:22,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [127496142] [2024-11-02 11:26:22,760 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-02 11:26:22,760 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 11:26:22,761 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 11:26:22,761 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 11:26:22,761 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 11:26:22,887 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 11:26:23,065 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1158#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 2 |ULTIMATE.start_main_~#array~0#1.base|) (<= (+ |ULTIMATE.start_main_~largest~0#1| 1) (select (select |#memory_int| |ULTIMATE.start_main_~#array~0#1.base|) 0)))' at error location [2024-11-02 11:26:23,065 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 11:26:23,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 11:26:23,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2024-11-02 11:26:23,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250251700] [2024-11-02 11:26:23,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 11:26:23,066 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-02 11:26:23,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:26:23,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-02 11:26:23,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=1673, Unknown=0, NotChecked=0, Total=2862 [2024-11-02 11:26:23,069 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 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 11:26:23,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:26:23,445 INFO L93 Difference]: Finished difference Result 126 states and 177 transitions. [2024-11-02 11:26:23,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-02 11:26:23,445 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 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 49 [2024-11-02 11:26:23,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:26:23,447 INFO L225 Difference]: With dead ends: 126 [2024-11-02 11:26:23,447 INFO L226 Difference]: Without dead ends: 99 [2024-11-02 11:26:23,448 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1189, Invalid=1673, Unknown=0, NotChecked=0, Total=2862 [2024-11-02 11:26:23,450 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 11:26:23,450 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 11:26:23,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-02 11:26:23,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2024-11-02 11:26:23,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.030612244897959) internal successors, (101), 98 states have internal predecessors, (101), 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 11:26:23,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2024-11-02 11:26:23,470 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 49 [2024-11-02 11:26:23,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:26:23,470 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2024-11-02 11:26:23,471 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 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 11:26:23,471 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2024-11-02 11:26:23,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-11-02 11:26:23,476 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:26:23,477 INFO L215 NwaCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1, 1] [2024-11-02 11:26:23,506 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-02 11:26:23,677 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-02 11:26:23,678 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:26:23,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:26:23,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1801720515, now seen corresponding path program 5 times [2024-11-02 11:26:23,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:26:23,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190556456] [2024-11-02 11:26:23,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:23,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:26:23,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:27,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2024-11-02 11:26:27,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:26:27,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190556456] [2024-11-02 11:26:27,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190556456] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:26:27,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862698225] [2024-11-02 11:26:27,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 11:26:27,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:26:27,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:26:27,314 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:26:27,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8895a70d-0ff2-414e-9f83-380fe6ef0e1b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process