./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/avg10-2.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_f79c58a6-2c3b-41d7-a56a-4605403d86c4/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f79c58a6-2c3b-41d7-a56a-4605403d86c4/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_f79c58a6-2c3b-41d7-a56a-4605403d86c4/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f79c58a6-2c3b-41d7-a56a-4605403d86c4/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/avg10-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f79c58a6-2c3b-41d7-a56a-4605403d86c4/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_f79c58a6-2c3b-41d7-a56a-4605403d86c4/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 431bc26901e3cf271c74e4f10a5bc241d4509dbbafd99aaf0126c46ffc8b7c33 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:38:33,632 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:38:33,758 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f79c58a6-2c3b-41d7-a56a-4605403d86c4/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:38:33,766 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:38:33,768 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:38:33,810 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:38:33,813 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:38:33,815 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:38:33,815 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:38:33,816 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:38:33,817 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:38:33,818 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:38:33,819 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:38:33,819 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:38:33,822 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:38:33,823 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:38:33,823 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:38:33,824 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:38:33,824 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:38:33,824 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:38:33,825 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:38:33,829 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:38:33,829 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:38:33,830 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:38:33,830 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:38:33,830 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:38:33,831 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:38:33,831 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:38:33,831 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:38:33,832 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:38:33,835 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:38:33,835 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:38:33,836 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:38:33,836 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:38:33,836 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:38:33,837 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:38:33,837 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:38:33,837 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:38:33,837 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:38:33,838 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:38:33,838 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:38:33,839 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:38:33,839 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:38:33,839 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:38:33,841 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:38:33,842 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:38:33,842 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:38:33,842 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_f79c58a6-2c3b-41d7-a56a-4605403d86c4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f79c58a6-2c3b-41d7-a56a-4605403d86c4/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 431bc26901e3cf271c74e4f10a5bc241d4509dbbafd99aaf0126c46ffc8b7c33 [2024-11-02 12:38:34,144 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:38:34,169 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:38:34,172 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:38:34,174 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:38:34,174 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:38:34,176 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f79c58a6-2c3b-41d7-a56a-4605403d86c4/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/reducercommutativity/avg10-2.i Unable to find full path for "g++" [2024-11-02 12:38:36,485 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:38:36,741 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:38:36,742 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f79c58a6-2c3b-41d7-a56a-4605403d86c4/sv-benchmarks/c/reducercommutativity/avg10-2.i [2024-11-02 12:38:36,750 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f79c58a6-2c3b-41d7-a56a-4605403d86c4/bin/utaipan-verify-DbMuA5NWw2/data/f9d425657/303c2ffff28147928fc658078b9a15f9/FLAG3a2111980 [2024-11-02 12:38:36,765 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f79c58a6-2c3b-41d7-a56a-4605403d86c4/bin/utaipan-verify-DbMuA5NWw2/data/f9d425657/303c2ffff28147928fc658078b9a15f9 [2024-11-02 12:38:36,767 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:38:36,769 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:38:36,770 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:38:36,770 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:38:36,776 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:38:36,777 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:38:36" (1/1) ... [2024-11-02 12:38:36,779 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@660dcdf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:36, skipping insertion in model container [2024-11-02 12:38:36,779 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:38:36" (1/1) ... [2024-11-02 12:38:36,806 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:38:37,012 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_f79c58a6-2c3b-41d7-a56a-4605403d86c4/sv-benchmarks/c/reducercommutativity/avg10-2.i[1282,1295] [2024-11-02 12:38:37,017 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:38:37,027 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:38:37,047 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_f79c58a6-2c3b-41d7-a56a-4605403d86c4/sv-benchmarks/c/reducercommutativity/avg10-2.i[1282,1295] [2024-11-02 12:38:37,048 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:38:37,065 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:38:37,065 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:37 WrapperNode [2024-11-02 12:38:37,065 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:38:37,066 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:38:37,066 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:38:37,066 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:38:37,072 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:37" (1/1) ... [2024-11-02 12:38:37,080 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:37" (1/1) ... [2024-11-02 12:38:37,098 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2024-11-02 12:38:37,099 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:38:37,100 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:38:37,100 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:38:37,100 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:38:37,108 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:37" (1/1) ... [2024-11-02 12:38:37,108 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:37" (1/1) ... [2024-11-02 12:38:37,110 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:37" (1/1) ... [2024-11-02 12:38:37,111 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:37" (1/1) ... [2024-11-02 12:38:37,117 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:37" (1/1) ... [2024-11-02 12:38:37,121 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:37" (1/1) ... [2024-11-02 12:38:37,122 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:37" (1/1) ... [2024-11-02 12:38:37,123 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:37" (1/1) ... [2024-11-02 12:38:37,125 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:38:37,126 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:38:37,127 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:38:37,127 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:38:37,128 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:37" (1/1) ... [2024-11-02 12:38:37,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:38:37,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f79c58a6-2c3b-41d7-a56a-4605403d86c4/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:38:37,169 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f79c58a6-2c3b-41d7-a56a-4605403d86c4/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:38:37,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f79c58a6-2c3b-41d7-a56a-4605403d86c4/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:38:37,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:38:37,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:38:37,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-02 12:38:37,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-02 12:38:37,217 INFO L130 BoogieDeclarations]: Found specification of procedure avg [2024-11-02 12:38:37,217 INFO L138 BoogieDeclarations]: Found implementation of procedure avg [2024-11-02 12:38:37,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:38:37,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:38:37,218 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-02 12:38:37,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-02 12:38:37,319 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:38:37,325 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:38:37,626 INFO L? ?]: Removed 14 outVars from TransFormulas that were not future-live. [2024-11-02 12:38:37,626 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:38:37,709 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:38:37,709 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-02 12:38:37,710 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:38:37 BoogieIcfgContainer [2024-11-02 12:38:37,710 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:38:37,713 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:38:37,713 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:38:37,719 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:38:37,719 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:38:36" (1/3) ... [2024-11-02 12:38:37,721 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48dadd80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:38:37, skipping insertion in model container [2024-11-02 12:38:37,721 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:37" (2/3) ... [2024-11-02 12:38:37,722 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48dadd80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:38:37, skipping insertion in model container [2024-11-02 12:38:37,722 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:38:37" (3/3) ... [2024-11-02 12:38:37,724 INFO L112 eAbstractionObserver]: Analyzing ICFG avg10-2.i [2024-11-02 12:38:37,752 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:38:37,753 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 12:38:37,819 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:38:37,826 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;@e445982, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:38:37,826 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 12:38:37,830 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-02 12:38:37,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-02 12:38:37,837 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:38:37,837 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:38:37,838 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:38:37,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:38:37,845 INFO L85 PathProgramCache]: Analyzing trace with hash -2028269539, now seen corresponding path program 1 times [2024-11-02 12:38:37,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:38:37,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186544647] [2024-11-02 12:38:37,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:38:37,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:38:37,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:38:38,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 12:38:38,374 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:38:38,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186544647] [2024-11-02 12:38:38,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186544647] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:38:38,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:38:38,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:38:38,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432485522] [2024-11-02 12:38:38,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:38:38,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:38:38,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:38:38,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:38:38,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:38:38,405 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-02 12:38:38,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:38:38,457 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2024-11-02 12:38:38,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:38:38,460 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2024-11-02 12:38:38,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:38:38,468 INFO L225 Difference]: With dead ends: 33 [2024-11-02 12:38:38,468 INFO L226 Difference]: Without dead ends: 16 [2024-11-02 12:38:38,471 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:38:38,474 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:38:38,475 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:38:38,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-11-02 12:38:38,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-11-02 12:38:38,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-02 12:38:38,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2024-11-02 12:38:38,512 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 20 [2024-11-02 12:38:38,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:38:38,512 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2024-11-02 12:38:38,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-02 12:38:38,513 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2024-11-02 12:38:38,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-02 12:38:38,515 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:38:38,515 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:38:38,515 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:38:38,515 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:38:38,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:38:38,516 INFO L85 PathProgramCache]: Analyzing trace with hash -902435929, now seen corresponding path program 1 times [2024-11-02 12:38:38,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:38:38,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165612418] [2024-11-02 12:38:38,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:38:38,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:38:38,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:38:38,670 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 12:38:38,670 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:38:38,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165612418] [2024-11-02 12:38:38,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165612418] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:38:38,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315927677] [2024-11-02 12:38:38,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:38:38,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:38:38,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f79c58a6-2c3b-41d7-a56a-4605403d86c4/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:38:38,674 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f79c58a6-2c3b-41d7-a56a-4605403d86c4/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:38:38,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f79c58a6-2c3b-41d7-a56a-4605403d86c4/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:38:38,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:38:38,779 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-02 12:38:38,785 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:38:38,812 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-02 12:38:38,813 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:38:38,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315927677] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:38:38,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:38:38,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-11-02 12:38:38,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132325959] [2024-11-02 12:38:38,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:38:38,820 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:38:38,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:38:38,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:38:38,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:38:38,822 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-02 12:38:38,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:38:38,859 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2024-11-02 12:38:38,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:38:38,860 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2024-11-02 12:38:38,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:38:38,861 INFO L225 Difference]: With dead ends: 29 [2024-11-02 12:38:38,862 INFO L226 Difference]: Without dead ends: 17 [2024-11-02 12:38:38,863 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:38:38,864 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:38:38,866 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:38:38,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-02 12:38:38,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-11-02 12:38:38,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-02 12:38:38,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2024-11-02 12:38:38,875 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 21 [2024-11-02 12:38:38,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:38:38,876 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2024-11-02 12:38:38,877 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-02 12:38:38,877 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2024-11-02 12:38:38,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-02 12:38:38,879 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:38:38,880 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:38:38,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f79c58a6-2c3b-41d7-a56a-4605403d86c4/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-02 12:38:39,080 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f79c58a6-2c3b-41d7-a56a-4605403d86c4/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:38:39,083 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:38:39,083 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:38:39,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1749095812, now seen corresponding path program 1 times [2024-11-02 12:38:39,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:38:39,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809706111] [2024-11-02 12:38:39,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:38:39,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:38:39,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:38:39,314 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-02 12:38:39,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:38:39,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809706111] [2024-11-02 12:38:39,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809706111] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:38:39,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728176792] [2024-11-02 12:38:39,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:38:39,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:38:39,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f79c58a6-2c3b-41d7-a56a-4605403d86c4/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:38:39,319 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f79c58a6-2c3b-41d7-a56a-4605403d86c4/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:38:39,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f79c58a6-2c3b-41d7-a56a-4605403d86c4/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:38:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:38:39,445 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-02 12:38:39,447 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:38:39,467 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-02 12:38:39,469 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:38:39,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728176792] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:38:39,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:38:39,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-11-02 12:38:39,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293780833] [2024-11-02 12:38:39,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:38:39,474 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:38:39,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:38:39,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:38:39,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:38:39,477 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-02 12:38:39,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:38:39,528 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2024-11-02 12:38:39,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:38:39,533 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2024-11-02 12:38:39,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:38:39,534 INFO L225 Difference]: With dead ends: 27 [2024-11-02 12:38:39,535 INFO L226 Difference]: Without dead ends: 18 [2024-11-02 12:38:39,535 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:38:39,536 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:38:39,539 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:38:39,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-02 12:38:39,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-11-02 12:38:39,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-02 12:38:39,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2024-11-02 12:38:39,557 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 24 [2024-11-02 12:38:39,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:38:39,559 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2024-11-02 12:38:39,559 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-02 12:38:39,559 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2024-11-02 12:38:39,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-02 12:38:39,560 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:38:39,561 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:38:39,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f79c58a6-2c3b-41d7-a56a-4605403d86c4/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-02 12:38:39,762 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f79c58a6-2c3b-41d7-a56a-4605403d86c4/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:38:39,763 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:38:39,764 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:38:39,764 INFO L85 PathProgramCache]: Analyzing trace with hash 145221045, now seen corresponding path program 1 times [2024-11-02 12:38:39,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:38:39,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970667070] [2024-11-02 12:38:39,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:38:39,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:38:39,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:38:39,911 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-02 12:38:39,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:38:39,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970667070] [2024-11-02 12:38:39,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970667070] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:38:39,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520874935] [2024-11-02 12:38:39,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:38:39,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:38:39,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f79c58a6-2c3b-41d7-a56a-4605403d86c4/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:38:39,916 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f79c58a6-2c3b-41d7-a56a-4605403d86c4/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:38:39,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f79c58a6-2c3b-41d7-a56a-4605403d86c4/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 12:38:40,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:38:40,044 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-02 12:38:40,046 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:38:40,093 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-02 12:38:40,093 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:38:40,160 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-02 12:38:40,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520874935] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:38:40,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1615668929] [2024-11-02 12:38:40,192 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-02 12:38:40,192 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:38:40,196 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:38:40,205 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:38:40,205 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:38:41,612 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 10 for LOIs [2024-11-02 12:38:41,755 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:39:01,609 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '533#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~ret2~0#1_14| Int) (|v_ULTIMATE.start_main_~ret~1#1_14| Int) (|v_ULTIMATE.start_main_~ret5~0#1_14| Int)) (and (or (and (exists ((|v_#memory_int_40| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_40| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_40| |ULTIMATE.start_main_~#x~0#1.base|) 36 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 36))))) (exists ((v_avg_~ret~0_33 Int)) (and (or (= (mod v_avg_~ret~0_33 10) 0) (< 0 (+ v_avg_~ret~0_33 1))) (or (= (mod (div v_avg_~ret~0_33 10) 4294967296) (+ |v_ULTIMATE.start_main_~ret5~0#1_14| 4294967296)) (= |v_ULTIMATE.start_main_~ret5~0#1_14| (mod (div v_avg_~ret~0_33 10) 4294967296)))))) (and (exists ((v_avg_~ret~0_33 Int)) (and (<= (+ v_avg_~ret~0_33 1) 0) (not (= (mod v_avg_~ret~0_33 10) 0)) (or (= (mod (+ (div v_avg_~ret~0_33 10) 1) 4294967296) (+ |v_ULTIMATE.start_main_~ret5~0#1_14| 4294967296)) (= (mod (+ (div v_avg_~ret~0_33 10) 1) 4294967296) |v_ULTIMATE.start_main_~ret5~0#1_14|)))) (exists ((|v_#memory_int_40| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_40| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_40| |ULTIMATE.start_main_~#x~0#1.base|) 36 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 36))))))) (<= |v_ULTIMATE.start_main_~ret5~0#1_14| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret5~0#1_14| 2147483648)) (<= |v_ULTIMATE.start_main_~ret~1#1_14| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret2~0#1_14| 2147483648)) (or (not (= |v_ULTIMATE.start_main_~ret~1#1_14| |v_ULTIMATE.start_main_~ret5~0#1_14|)) (not (= |v_ULTIMATE.start_main_~ret2~0#1_14| |v_ULTIMATE.start_main_~ret~1#1_14|))) (<= |v_ULTIMATE.start_main_~ret2~0#1_14| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret~1#1_14| 2147483648)))) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0))' at error location [2024-11-02 12:39:01,610 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:39:01,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:39:01,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2024-11-02 12:39:01,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898594675] [2024-11-02 12:39:01,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:39:01,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-02 12:39:01,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:39:01,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-02 12:39:01,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=286, Unknown=25, NotChecked=0, Total=380 [2024-11-02 12:39:01,613 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-02 12:39:01,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:39:01,655 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2024-11-02 12:39:01,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 12:39:01,658 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 25 [2024-11-02 12:39:01,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:39:01,659 INFO L225 Difference]: With dead ends: 36 [2024-11-02 12:39:01,659 INFO L226 Difference]: Without dead ends: 21 [2024-11-02 12:39:01,660 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=69, Invalid=286, Unknown=25, NotChecked=0, Total=380 [2024-11-02 12:39:01,662 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:39:01,665 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:39:01,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-02 12:39:01,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-02 12:39:01,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-02 12:39:01,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2024-11-02 12:39:01,674 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2024-11-02 12:39:01,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:39:01,674 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2024-11-02 12:39:01,674 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-02 12:39:01,674 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2024-11-02 12:39:01,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-02 12:39:01,675 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:39:01,675 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:39:01,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f79c58a6-2c3b-41d7-a56a-4605403d86c4/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-02 12:39:01,876 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f79c58a6-2c3b-41d7-a56a-4605403d86c4/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:39:01,876 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:39:01,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:39:01,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1399599531, now seen corresponding path program 2 times [2024-11-02 12:39:01,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:39:01,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935505619] [2024-11-02 12:39:01,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:39:01,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:39:01,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:39:02,035 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-02 12:39:02,036 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:39:02,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935505619] [2024-11-02 12:39:02,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935505619] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:39:02,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710489791] [2024-11-02 12:39:02,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 12:39:02,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:39:02,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f79c58a6-2c3b-41d7-a56a-4605403d86c4/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:39:02,041 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f79c58a6-2c3b-41d7-a56a-4605403d86c4/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:39:02,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f79c58a6-2c3b-41d7-a56a-4605403d86c4/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-02 12:39:02,160 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-02 12:39:02,161 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:39:02,164 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-02 12:39:02,166 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:39:02,184 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-02 12:39:02,186 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:39:02,244 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-02 12:39:02,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710489791] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:39:02,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1402450145] [2024-11-02 12:39:02,251 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-02 12:39:02,251 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:39:02,252 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:39:02,252 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:39:02,252 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:39:04,262 INFO L197 IcfgInterpreter]: Interpreting procedure avg with input of size 10 for LOIs [2024-11-02 12:39:04,326 INFO L180 IcfgInterpreter]: Interpretation finished