./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy2_ground-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_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/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_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy2_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/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_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/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 910d8e768520d514eafd11bd6e0d202501f1eee040b6e70d07e33c173cc4a1ca --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:40:15,631 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:40:15,748 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:40:15,754 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:40:15,755 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:40:15,805 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:40:15,805 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:40:15,806 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:40:15,807 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:40:15,807 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:40:15,808 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:40:15,809 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:40:15,809 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:40:15,810 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:40:15,810 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:40:15,811 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:40:15,811 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:40:15,812 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:40:15,812 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:40:15,813 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:40:15,833 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:40:15,834 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:40:15,835 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:40:15,836 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:40:15,836 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:40:15,837 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:40:15,837 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:40:15,838 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:40:15,838 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:40:15,839 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:40:15,839 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:40:15,839 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:40:15,840 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:40:15,840 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:40:15,841 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:40:15,841 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:40:15,842 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:40:15,842 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:40:15,843 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:40:15,843 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:40:15,844 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:40:15,844 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:40:15,845 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:40:15,845 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:40:15,846 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:40:15,846 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:40:15,846 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:40:15,847 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_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 910d8e768520d514eafd11bd6e0d202501f1eee040b6e70d07e33c173cc4a1ca [2024-11-02 12:40:16,201 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:40:16,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:40:16,266 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:40:16,268 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:40:16,270 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:40:16,271 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/array-examples/standard_copy2_ground-2.i Unable to find full path for "g++" [2024-11-02 12:40:18,496 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:40:18,710 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:40:18,711 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/sv-benchmarks/c/array-examples/standard_copy2_ground-2.i [2024-11-02 12:40:18,720 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/data/62724dacf/2559a133278f4515856a710cdff75a31/FLAG66f81ac30 [2024-11-02 12:40:19,097 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/data/62724dacf/2559a133278f4515856a710cdff75a31 [2024-11-02 12:40:19,102 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:40:19,107 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:40:19,109 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:40:19,109 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:40:19,125 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:40:19,126 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:40:19" (1/1) ... [2024-11-02 12:40:19,134 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78e9b31b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:40:19, skipping insertion in model container [2024-11-02 12:40:19,134 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:40:19" (1/1) ... [2024-11-02 12:40:19,165 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:40:19,444 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_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/sv-benchmarks/c/array-examples/standard_copy2_ground-2.i[816,829] [2024-11-02 12:40:19,470 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:40:19,483 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:40:19,498 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_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/sv-benchmarks/c/array-examples/standard_copy2_ground-2.i[816,829] [2024-11-02 12:40:19,506 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:40:19,526 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:40:19,526 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:40:19 WrapperNode [2024-11-02 12:40:19,527 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:40:19,529 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:40:19,529 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:40:19,529 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:40:19,538 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:40:19" (1/1) ... [2024-11-02 12:40:19,546 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:40:19" (1/1) ... [2024-11-02 12:40:19,570 INFO L138 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 80 [2024-11-02 12:40:19,570 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:40:19,572 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:40:19,572 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:40:19,572 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:40:19,580 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:40:19" (1/1) ... [2024-11-02 12:40:19,581 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:40:19" (1/1) ... [2024-11-02 12:40:19,582 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:40:19" (1/1) ... [2024-11-02 12:40:19,582 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:40:19" (1/1) ... [2024-11-02 12:40:19,592 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:40:19" (1/1) ... [2024-11-02 12:40:19,600 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:40:19" (1/1) ... [2024-11-02 12:40:19,601 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:40:19" (1/1) ... [2024-11-02 12:40:19,603 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:40:19" (1/1) ... [2024-11-02 12:40:19,605 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:40:19,607 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:40:19,607 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:40:19,607 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:40:19,609 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:40:19" (1/1) ... [2024-11-02 12:40:19,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:40:19,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:40:19,651 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:40:19,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:40:19,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:40:19,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:40:19,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-02 12:40:19,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-02 12:40:19,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:40:19,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:40:19,689 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-02 12:40:19,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-02 12:40:19,785 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:40:19,788 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:40:20,112 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-02 12:40:20,112 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:40:20,201 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:40:20,201 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-02 12:40:20,202 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:40:20 BoogieIcfgContainer [2024-11-02 12:40:20,202 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:40:20,204 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:40:20,204 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:40:20,208 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:40:20,208 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:40:19" (1/3) ... [2024-11-02 12:40:20,209 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aba338d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:40:20, skipping insertion in model container [2024-11-02 12:40:20,209 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:40:19" (2/3) ... [2024-11-02 12:40:20,210 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aba338d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:40:20, skipping insertion in model container [2024-11-02 12:40:20,210 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:40:20" (3/3) ... [2024-11-02 12:40:20,211 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy2_ground-2.i [2024-11-02 12:40:20,235 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:40:20,236 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 12:40:20,325 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:40:20,336 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;@49e99876, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:40:20,336 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 12:40:20,342 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:40:20,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-02 12:40:20,351 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:40:20,352 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:40:20,352 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:40:20,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:40:20,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1956512114, now seen corresponding path program 1 times [2024-11-02 12:40:20,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:40:20,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021206747] [2024-11-02 12:40:20,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:40:20,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:40:20,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:40:20,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:40:20,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:40:20,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021206747] [2024-11-02 12:40:20,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021206747] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:40:20,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:40:20,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:40:20,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646103288] [2024-11-02 12:40:20,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:40:20,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:40:20,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:40:20,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:40:20,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:40:20,754 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:40:20,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:40:20,805 INFO L93 Difference]: Finished difference Result 19 states and 27 transitions. [2024-11-02 12:40:20,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:40:20,809 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-02 12:40:20,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:40:20,816 INFO L225 Difference]: With dead ends: 19 [2024-11-02 12:40:20,816 INFO L226 Difference]: Without dead ends: 10 [2024-11-02 12:40:20,819 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:40:20,823 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:40:20,825 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:40:20,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2024-11-02 12:40:20,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2024-11-02 12:40:20,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:40:20,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2024-11-02 12:40:20,877 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2024-11-02 12:40:20,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:40:20,880 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2024-11-02 12:40:20,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:40:20,880 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2024-11-02 12:40:20,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-02 12:40:20,881 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:40:20,881 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:40:20,882 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:40:20,884 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:40:20,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:40:20,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1364452692, now seen corresponding path program 1 times [2024-11-02 12:40:20,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:40:20,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915016045] [2024-11-02 12:40:20,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:40:20,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:40:20,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:40:21,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:40:21,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:40:21,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915016045] [2024-11-02 12:40:21,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915016045] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:40:21,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977000250] [2024-11-02 12:40:21,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:40:21,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:40:21,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:40:21,097 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:40:21,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:40:21,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:40:21,237 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-02 12:40:21,242 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:40:21,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:40:21,265 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:40:21,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977000250] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:40:21,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:40:21,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2024-11-02 12:40:21,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214262341] [2024-11-02 12:40:21,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:40:21,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:40:21,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:40:21,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:40:21,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:40:21,269 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:40:21,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:40:21,305 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2024-11-02 12:40:21,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:40:21,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-02 12:40:21,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:40:21,307 INFO L225 Difference]: With dead ends: 18 [2024-11-02 12:40:21,307 INFO L226 Difference]: Without dead ends: 12 [2024-11-02 12:40:21,307 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 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 12:40:21,311 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:40:21,312 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:40:21,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2024-11-02 12:40:21,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2024-11-02 12:40:21,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:40:21,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2024-11-02 12:40:21,321 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 8 [2024-11-02 12:40:21,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:40:21,322 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2024-11-02 12:40:21,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:40:21,323 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2024-11-02 12:40:21,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-02 12:40:21,323 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:40:21,323 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:40:21,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-02 12:40:21,525 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:40:21,525 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:40:21,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:40:21,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1180850650, now seen corresponding path program 1 times [2024-11-02 12:40:21,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:40:21,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954942035] [2024-11-02 12:40:21,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:40:21,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:40:21,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:40:21,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:40:21,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:40:21,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954942035] [2024-11-02 12:40:21,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954942035] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:40:21,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46388814] [2024-11-02 12:40:21,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:40:21,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:40:21,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:40:21,680 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:40:21,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:40:21,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:40:21,820 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-02 12:40:21,822 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:40:21,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:40:21,873 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:40:21,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:40:21,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46388814] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:40:21,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1928199889] [2024-11-02 12:40:21,949 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-02 12:40:21,950 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:40:21,954 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:40:21,960 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:40:21,962 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:40:22,880 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:40:23,203 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '193#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) 0))))' at error location [2024-11-02 12:40:23,204 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:40:23,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:40:23,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-02 12:40:23,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747887718] [2024-11-02 12:40:23,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:40:23,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-02 12:40:23,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:40:23,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-02 12:40:23,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-11-02 12:40:23,206 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:40:23,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:40:23,258 INFO L93 Difference]: Finished difference Result 24 states and 32 transitions. [2024-11-02 12:40:23,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 12:40:23,259 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-02 12:40:23,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:40:23,260 INFO L225 Difference]: With dead ends: 24 [2024-11-02 12:40:23,260 INFO L226 Difference]: Without dead ends: 15 [2024-11-02 12:40:23,261 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-11-02 12:40:23,262 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:40:23,263 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:40:23,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-11-02 12:40:23,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-11-02 12:40:23,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:40:23,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2024-11-02 12:40:23,268 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 10 [2024-11-02 12:40:23,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:40:23,268 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2024-11-02 12:40:23,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:40:23,269 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2024-11-02 12:40:23,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-02 12:40:23,269 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:40:23,269 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:40:23,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-02 12:40:23,470 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:40:23,471 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:40:23,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:40:23,471 INFO L85 PathProgramCache]: Analyzing trace with hash 107578784, now seen corresponding path program 2 times [2024-11-02 12:40:23,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:40:23,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920353330] [2024-11-02 12:40:23,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:40:23,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:40:23,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:40:23,641 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-02 12:40:23,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:40:23,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920353330] [2024-11-02 12:40:23,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920353330] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:40:23,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85310410] [2024-11-02 12:40:23,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 12:40:23,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:40:23,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:40:23,645 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:40:23,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 12:40:23,720 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-02 12:40:23,720 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:40:23,722 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-02 12:40:23,723 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:40:23,735 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-02 12:40:23,735 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:40:23,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-02 12:40:23,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85310410] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:40:23,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [568033991] [2024-11-02 12:40:23,757 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-02 12:40:23,758 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:40:23,758 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:40:23,758 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:40:23,759 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:40:24,146 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:40:24,382 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '341#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) 0))))' at error location [2024-11-02 12:40:24,382 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:40:24,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:40:24,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-02 12:40:24,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149127908] [2024-11-02 12:40:24,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:40:24,384 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-02 12:40:24,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:40:24,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-02 12:40:24,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-11-02 12:40:24,386 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:40:24,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:40:24,448 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2024-11-02 12:40:24,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 12:40:24,449 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-02 12:40:24,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:40:24,450 INFO L225 Difference]: With dead ends: 28 [2024-11-02 12:40:24,450 INFO L226 Difference]: Without dead ends: 21 [2024-11-02 12:40:24,450 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-11-02 12:40:24,451 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:40:24,451 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:40:24,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-02 12:40:24,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-02 12:40:24,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:40:24,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2024-11-02 12:40:24,462 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2024-11-02 12:40:24,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:40:24,463 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2024-11-02 12:40:24,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:40:24,463 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2024-11-02 12:40:24,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-02 12:40:24,464 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:40:24,464 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:40:24,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-02 12:40:24,664 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:40:24,665 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:40:24,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:40:24,666 INFO L85 PathProgramCache]: Analyzing trace with hash 2116166386, now seen corresponding path program 3 times [2024-11-02 12:40:24,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:40:24,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248012828] [2024-11-02 12:40:24,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:40:24,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:40:24,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:40:24,856 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-02 12:40:24,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:40:24,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248012828] [2024-11-02 12:40:24,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248012828] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:40:24,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546583833] [2024-11-02 12:40:24,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-02 12:40:24,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:40:24,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:40:24,862 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:40:24,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-02 12:40:24,972 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-02 12:40:24,973 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:40:24,974 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-02 12:40:24,975 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:40:24,994 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-02 12:40:24,994 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:40:25,069 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-02 12:40:25,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546583833] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:40:25,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [158936137] [2024-11-02 12:40:25,072 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-02 12:40:25,072 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:40:25,072 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:40:25,072 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:40:25,073 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:40:25,441 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:40:25,778 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '551#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) 0))))' at error location [2024-11-02 12:40:25,778 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:40:25,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:40:25,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-02 12:40:25,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645169102] [2024-11-02 12:40:25,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:40:25,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-02 12:40:25,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:40:25,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-02 12:40:25,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2024-11-02 12:40:25,782 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:40:25,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:40:25,835 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2024-11-02 12:40:25,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-02 12:40:25,835 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 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 19 [2024-11-02 12:40:25,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:40:25,836 INFO L225 Difference]: With dead ends: 42 [2024-11-02 12:40:25,836 INFO L226 Difference]: Without dead ends: 27 [2024-11-02 12:40:25,837 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2024-11-02 12:40:25,838 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:40:25,839 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:40:25,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-02 12:40:25,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-02 12:40:25,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:40:25,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2024-11-02 12:40:25,843 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 19 [2024-11-02 12:40:25,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:40:25,844 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2024-11-02 12:40:25,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:40:25,844 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2024-11-02 12:40:25,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-02 12:40:25,845 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:40:25,845 INFO L215 NwaCegarLoop]: trace histogram [10, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:40:25,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-02 12:40:26,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:40:26,046 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:40:26,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:40:26,046 INFO L85 PathProgramCache]: Analyzing trace with hash -2051110734, now seen corresponding path program 4 times [2024-11-02 12:40:26,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:40:26,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905196651] [2024-11-02 12:40:26,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:40:26,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:40:26,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:40:26,390 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-02 12:40:26,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:40:26,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905196651] [2024-11-02 12:40:26,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905196651] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:40:26,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122443850] [2024-11-02 12:40:26,392 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-02 12:40:26,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:40:26,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:40:26,394 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:40:26,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-02 12:40:26,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:40:26,512 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-02 12:40:26,514 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:40:26,548 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-02 12:40:26,548 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:40:26,819 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-02 12:40:26,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122443850] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:40:26,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [693952701] [2024-11-02 12:40:26,822 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-02 12:40:26,823 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:40:26,823 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:40:26,823 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:40:26,824 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:40:27,080 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:40:27,430 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '849#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) 0))))' at error location [2024-11-02 12:40:27,430 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:40:27,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:40:27,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2024-11-02 12:40:27,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473569172] [2024-11-02 12:40:27,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:40:27,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-02 12:40:27,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:40:27,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-02 12:40:27,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=558, Unknown=0, NotChecked=0, Total=870 [2024-11-02 12:40:27,433 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:40:27,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:40:27,494 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2024-11-02 12:40:27,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-02 12:40:27,494 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 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 12:40:27,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:40:27,495 INFO L225 Difference]: With dead ends: 54 [2024-11-02 12:40:27,495 INFO L226 Difference]: Without dead ends: 39 [2024-11-02 12:40:27,496 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=312, Invalid=558, Unknown=0, NotChecked=0, Total=870 [2024-11-02 12:40:27,497 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:40:27,498 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:40:27,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-02 12:40:27,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-02 12:40:27,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:40:27,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2024-11-02 12:40:27,504 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 25 [2024-11-02 12:40:27,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:40:27,504 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2024-11-02 12:40:27,504 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:40:27,504 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2024-11-02 12:40:27,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-02 12:40:27,505 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:40:27,506 INFO L215 NwaCegarLoop]: trace histogram [22, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:40:27,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-02 12:40:27,710 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:40:27,710 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:40:27,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:40:27,711 INFO L85 PathProgramCache]: Analyzing trace with hash -69639118, now seen corresponding path program 5 times [2024-11-02 12:40:27,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:40:27,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667304631] [2024-11-02 12:40:27,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:40:27,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:40:27,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:40:28,459 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-02 12:40:28,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:40:28,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667304631] [2024-11-02 12:40:28,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667304631] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:40:28,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996049738] [2024-11-02 12:40:28,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 12:40:28,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:40:28,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:40:28,463 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:40:28,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-02 12:40:28,590 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-02 12:40:28,591 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:40:28,592 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-02 12:40:28,595 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:40:28,713 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2024-11-02 12:40:28,716 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:40:28,892 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2024-11-02 12:40:28,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996049738] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:40:28,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1773614324] [2024-11-02 12:40:28,897 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-02 12:40:28,897 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:40:28,897 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:40:28,897 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:40:28,898 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:40:29,189 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:40:29,687 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1277#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) 0))))' at error location [2024-11-02 12:40:29,688 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:40:29,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:40:29,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2024-11-02 12:40:29,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922940529] [2024-11-02 12:40:29,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:40:29,689 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-02 12:40:29,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:40:29,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-02 12:40:29,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=1183, Unknown=0, NotChecked=0, Total=1560 [2024-11-02 12:40:29,693 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 35 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:40:29,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:40:29,845 INFO L93 Difference]: Finished difference Result 67 states and 85 transitions. [2024-11-02 12:40:29,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-02 12:40:29,845 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 states have internal predecessors, (45), 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 37 [2024-11-02 12:40:29,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:40:29,846 INFO L225 Difference]: With dead ends: 67 [2024-11-02 12:40:29,846 INFO L226 Difference]: Without dead ends: 52 [2024-11-02 12:40:29,847 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 90 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=377, Invalid=1183, Unknown=0, NotChecked=0, Total=1560 [2024-11-02 12:40:29,848 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:40:29,848 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:40:29,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-02 12:40:29,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-11-02 12:40:29,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 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 12:40:29,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2024-11-02 12:40:29,856 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 37 [2024-11-02 12:40:29,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:40:29,857 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2024-11-02 12:40:29,857 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:40:29,857 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2024-11-02 12:40:29,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-02 12:40:29,858 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:40:29,858 INFO L215 NwaCegarLoop]: trace histogram [23, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:40:29,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-02 12:40:30,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-02 12:40:30,059 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:40:30,060 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:40:30,060 INFO L85 PathProgramCache]: Analyzing trace with hash 468160876, now seen corresponding path program 6 times [2024-11-02 12:40:30,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:40:30,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28133672] [2024-11-02 12:40:30,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:40:30,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:40:30,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:40:30,968 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-02 12:40:30,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:40:30,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28133672] [2024-11-02 12:40:30,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28133672] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:40:30,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773809893] [2024-11-02 12:40:30,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-02 12:40:30,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:40:30,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:40:30,971 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:40:30,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-02 12:40:31,138 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-02 12:40:31,139 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:40:31,141 INFO L255 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-02 12:40:31,144 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:40:31,235 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-02 12:40:31,235 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:40:32,117 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-02 12:40:32,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773809893] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:40:32,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [914540210] [2024-11-02 12:40:32,119 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-02 12:40:32,120 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:40:32,120 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:40:32,120 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:40:32,120 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:40:32,322 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:40:32,590 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1851#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) 0))))' at error location [2024-11-02 12:40:32,590 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:40:32,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:40:32,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2024-11-02 12:40:32,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96124373] [2024-11-02 12:40:32,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:40:32,591 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-02 12:40:32,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:40:32,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-02 12:40:32,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1287, Invalid=1793, Unknown=0, NotChecked=0, Total=3080 [2024-11-02 12:40:32,594 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 51 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:40:32,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:40:32,723 INFO L93 Difference]: Finished difference Result 104 states and 134 transitions. [2024-11-02 12:40:32,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-02 12:40:32,724 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 50 states have internal predecessors, (59), 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 50 [2024-11-02 12:40:32,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:40:32,725 INFO L225 Difference]: With dead ends: 104 [2024-11-02 12:40:32,726 INFO L226 Difference]: Without dead ends: 77 [2024-11-02 12:40:32,727 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1287, Invalid=1793, Unknown=0, NotChecked=0, Total=3080 [2024-11-02 12:40:32,727 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:40:32,728 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:40:32,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-02 12:40:32,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2024-11-02 12:40:32,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:40:32,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2024-11-02 12:40:32,737 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 50 [2024-11-02 12:40:32,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:40:32,737 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2024-11-02 12:40:32,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:40:32,738 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2024-11-02 12:40:32,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-02 12:40:32,739 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:40:32,739 INFO L215 NwaCegarLoop]: trace histogram [48, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:40:32,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-02 12:40:32,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:40:32,944 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:40:32,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:40:32,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1224380686, now seen corresponding path program 7 times [2024-11-02 12:40:32,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:40:32,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563841988] [2024-11-02 12:40:32,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:40:32,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:40:33,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:40:35,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1286 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-02 12:40:35,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:40:35,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563841988] [2024-11-02 12:40:35,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563841988] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:40:35,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292700382] [2024-11-02 12:40:35,822 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-02 12:40:35,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:40:35,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:40:35,824 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:40:35,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-02 12:40:36,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:40:36,073 INFO L255 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-02 12:40:36,080 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:40:36,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1286 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-02 12:40:36,216 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:40:40,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1286 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-11-02 12:40:40,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292700382] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:40:40,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [643091601] [2024-11-02 12:40:40,036 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-02 12:40:40,036 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:40:40,037 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:40:40,037 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:40:40,037 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:40:40,249 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:40:41,033 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2749#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) 0))))' at error location [2024-11-02 12:40:41,033 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:40:41,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:40:41,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2024-11-02 12:40:41,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994009696] [2024-11-02 12:40:41,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:40:41,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2024-11-02 12:40:41,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:40:41,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2024-11-02 12:40:41,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5062, Invalid=6068, Unknown=0, NotChecked=0, Total=11130 [2024-11-02 12:40:41,040 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 101 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 100 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:40:41,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:40:41,246 INFO L93 Difference]: Finished difference Result 154 states and 209 transitions. [2024-11-02 12:40:41,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2024-11-02 12:40:41,247 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 100 states have internal predecessors, (109), 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 75 [2024-11-02 12:40:41,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:40:41,248 INFO L225 Difference]: With dead ends: 154 [2024-11-02 12:40:41,248 INFO L226 Difference]: Without dead ends: 127 [2024-11-02 12:40:41,250 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 158 SyntacticMatches, 11 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2545 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=5062, Invalid=6068, Unknown=0, NotChecked=0, Total=11130 [2024-11-02 12:40:41,251 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:40:41,252 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:40:41,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-02 12:40:41,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2024-11-02 12:40:41,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.0317460317460319) internal successors, (130), 126 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:40:41,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2024-11-02 12:40:41,263 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 75 [2024-11-02 12:40:41,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:40:41,263 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2024-11-02 12:40:41,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 100 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:40:41,264 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2024-11-02 12:40:41,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-02 12:40:41,267 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:40:41,267 INFO L215 NwaCegarLoop]: trace histogram [98, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:40:41,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-02 12:40:41,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b9dcd78-be3a-4c3b-aeb2-c64b963713ef/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:40:41,468 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:40:41,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:40:41,468 INFO L85 PathProgramCache]: Analyzing trace with hash 678028338, now seen corresponding path program 8 times [2024-11-02 12:40:41,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:40:41,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075891962] [2024-11-02 12:40:41,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:40:41,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:40:41,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat