./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/busybox-1.22.0/usleep-2.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24623091-94c9-4efe-a1d1-5626a1f98878/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24623091-94c9-4efe-a1d1-5626a1f98878/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_24623091-94c9-4efe-a1d1-5626a1f98878/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24623091-94c9-4efe-a1d1-5626a1f98878/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/busybox-1.22.0/usleep-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24623091-94c9-4efe-a1d1-5626a1f98878/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24623091-94c9-4efe-a1d1-5626a1f98878/bin/utaipan-verify-DbMuA5NWw2 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash ddb26eab16f240735f9d1465e4eb4848a506b7f6f359090de5f9df37aee37107 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 11:23:21,654 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 11:23:21,742 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24623091-94c9-4efe-a1d1-5626a1f98878/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Overflow-64bit-Taipan_Default.epf [2024-11-02 11:23:21,749 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 11:23:21,754 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 11:23:21,795 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 11:23:21,795 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 11:23:21,796 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 11:23:21,797 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 11:23:21,799 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 11:23:21,799 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 11:23:21,799 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 11:23:21,800 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 11:23:21,800 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 11:23:21,800 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 11:23:21,801 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 11:23:21,801 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 11:23:21,801 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 11:23:21,802 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 11:23:21,802 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 11:23:21,802 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 11:23:21,807 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 11:23:21,808 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 11:23:21,811 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 11:23:21,812 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 11:23:21,812 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 11:23:21,812 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 11:23:21,813 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 11:23:21,813 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 11:23:21,813 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 11:23:21,826 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-11-02 11:23:21,827 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-02 11:23:21,827 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 11:23:21,827 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 11:23:21,828 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 11:23:21,828 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 11:23:21,829 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 11:23:21,829 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:23:21,829 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 11:23:21,829 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 11:23:21,830 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 11:23:21,830 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 11:23:21,830 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 11:23:21,830 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 11:23:21,831 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 11:23:21,832 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 11:23:21,832 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_24623091-94c9-4efe-a1d1-5626a1f98878/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24623091-94c9-4efe-a1d1-5626a1f98878/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ddb26eab16f240735f9d1465e4eb4848a506b7f6f359090de5f9df37aee37107 [2024-11-02 11:23:22,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 11:23:22,130 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 11:23:22,134 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 11:23:22,136 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 11:23:22,138 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 11:23:22,139 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24623091-94c9-4efe-a1d1-5626a1f98878/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/busybox-1.22.0/usleep-2.i Unable to find full path for "g++" [2024-11-02 11:23:24,337 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 11:23:24,701 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 11:23:24,702 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24623091-94c9-4efe-a1d1-5626a1f98878/sv-benchmarks/c/busybox-1.22.0/usleep-2.i [2024-11-02 11:23:24,732 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24623091-94c9-4efe-a1d1-5626a1f98878/bin/utaipan-verify-DbMuA5NWw2/data/163409a37/8661571ee363496cae58442faacbde19/FLAG5065a5830 [2024-11-02 11:23:24,753 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24623091-94c9-4efe-a1d1-5626a1f98878/bin/utaipan-verify-DbMuA5NWw2/data/163409a37/8661571ee363496cae58442faacbde19 [2024-11-02 11:23:24,755 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 11:23:24,757 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 11:23:24,758 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 11:23:24,758 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 11:23:24,764 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 11:23:24,767 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:23:24" (1/1) ... [2024-11-02 11:23:24,768 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@753d2a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:24, skipping insertion in model container [2024-11-02 11:23:24,769 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:23:24" (1/1) ... [2024-11-02 11:23:24,858 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 11:23:26,438 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:23:26,487 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 11:23:26,657 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:23:26,910 INFO L204 MainTranslator]: Completed translation [2024-11-02 11:23:26,911 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:26 WrapperNode [2024-11-02 11:23:26,911 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 11:23:26,912 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 11:23:26,913 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 11:23:26,913 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 11:23:26,922 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:26" (1/1) ... [2024-11-02 11:23:26,987 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:26" (1/1) ... [2024-11-02 11:23:27,091 INFO L138 Inliner]: procedures = 598, calls = 525, calls flagged for inlining = 19, calls inlined = 17, statements flattened = 987 [2024-11-02 11:23:27,091 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 11:23:27,092 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 11:23:27,092 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 11:23:27,093 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 11:23:27,105 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:26" (1/1) ... [2024-11-02 11:23:27,105 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:26" (1/1) ... [2024-11-02 11:23:27,122 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:26" (1/1) ... [2024-11-02 11:23:27,127 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:26" (1/1) ... [2024-11-02 11:23:27,170 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:26" (1/1) ... [2024-11-02 11:23:27,180 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:26" (1/1) ... [2024-11-02 11:23:27,198 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:26" (1/1) ... [2024-11-02 11:23:27,212 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:26" (1/1) ... [2024-11-02 11:23:27,229 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 11:23:27,230 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 11:23:27,230 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 11:23:27,231 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 11:23:27,232 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:26" (1/1) ... [2024-11-02 11:23:27,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:23:27,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24623091-94c9-4efe-a1d1-5626a1f98878/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:23:27,304 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24623091-94c9-4efe-a1d1-5626a1f98878/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 11:23:27,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24623091-94c9-4efe-a1d1-5626a1f98878/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 11:23:27,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-02 11:23:27,346 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2024-11-02 11:23:27,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2024-11-02 11:23:27,347 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-02 11:23:27,347 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-02 11:23:27,347 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 11:23:27,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-02 11:23:27,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 11:23:27,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 11:23:27,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2024-11-02 11:23:27,349 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2024-11-02 11:23:27,351 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2024-11-02 11:23:27,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2024-11-02 11:23:27,353 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-02 11:23:27,354 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-02 11:23:27,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-02 11:23:27,354 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-02 11:23:27,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-02 11:23:27,354 INFO L130 BoogieDeclarations]: Found specification of procedure bb_error_msg_and_die [2024-11-02 11:23:27,355 INFO L138 BoogieDeclarations]: Found implementation of procedure bb_error_msg_and_die [2024-11-02 11:23:27,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 11:23:27,919 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 11:23:27,923 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 11:23:29,137 INFO L? ?]: Removed 284 outVars from TransFormulas that were not future-live. [2024-11-02 11:23:29,138 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 11:23:29,374 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 11:23:29,375 INFO L316 CfgBuilder]: Removed 11 assume(true) statements. [2024-11-02 11:23:29,376 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:23:29 BoogieIcfgContainer [2024-11-02 11:23:29,376 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 11:23:29,380 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 11:23:29,380 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 11:23:29,385 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 11:23:29,385 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:23:24" (1/3) ... [2024-11-02 11:23:29,386 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79d19bda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:23:29, skipping insertion in model container [2024-11-02 11:23:29,387 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:26" (2/3) ... [2024-11-02 11:23:29,389 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79d19bda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:23:29, skipping insertion in model container [2024-11-02 11:23:29,389 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:23:29" (3/3) ... [2024-11-02 11:23:29,391 INFO L112 eAbstractionObserver]: Analyzing ICFG usleep-2.i [2024-11-02 11:23:29,414 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 11:23:29,415 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 35 error locations. [2024-11-02 11:23:29,500 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 11:23:29,511 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;@26bd9494, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 11:23:29,511 INFO L334 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2024-11-02 11:23:29,516 INFO L276 IsEmpty]: Start isEmpty. Operand has 151 states, 102 states have (on average 1.7254901960784315) internal successors, (176), 137 states have internal predecessors, (176), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-02 11:23:29,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-02 11:23:29,523 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:23:29,523 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-02 11:23:29,523 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_error_msg_and_dieErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_error_msg_and_dieErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_error_msg_and_dieErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2024-11-02 11:23:29,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:23:29,528 INFO L85 PathProgramCache]: Analyzing trace with hash 530977, now seen corresponding path program 1 times [2024-11-02 11:23:29,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:23:29,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803570672] [2024-11-02 11:23:29,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:23:29,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:23:29,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:23:30,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:23:30,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:23:30,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803570672] [2024-11-02 11:23:30,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803570672] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:23:30,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:23:30,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-02 11:23:30,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948821316] [2024-11-02 11:23:30,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:23:30,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:23:30,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:23:30,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:23:30,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:23:30,316 INFO L87 Difference]: Start difference. First operand has 151 states, 102 states have (on average 1.7254901960784315) internal successors, (176), 137 states have internal predecessors, (176), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:23:30,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:23:30,572 INFO L93 Difference]: Finished difference Result 286 states and 376 transitions. [2024-11-02 11:23:30,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:23:30,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2024-11-02 11:23:30,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:23:30,589 INFO L225 Difference]: With dead ends: 286 [2024-11-02 11:23:30,589 INFO L226 Difference]: Without dead ends: 136 [2024-11-02 11:23:30,595 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:23:30,603 INFO L432 NwaCegarLoop]: 149 mSDtfsCounter, 1 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 11:23:30,604 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 296 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 11:23:30,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-11-02 11:23:30,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2024-11-02 11:23:30,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 92 states have (on average 1.6521739130434783) internal successors, (152), 125 states have internal predecessors, (152), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-02 11:23:30,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 168 transitions. [2024-11-02 11:23:30,669 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 168 transitions. Word has length 3 [2024-11-02 11:23:30,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:23:30,669 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 168 transitions. [2024-11-02 11:23:30,669 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:23:30,670 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 168 transitions. [2024-11-02 11:23:30,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-02 11:23:30,671 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:23:30,671 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2024-11-02 11:23:30,671 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 11:23:30,671 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_error_msg_and_dieErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_error_msg_and_dieErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_error_msg_and_dieErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2024-11-02 11:23:30,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:23:30,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1361214781, now seen corresponding path program 1 times [2024-11-02 11:23:30,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:23:30,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255649832] [2024-11-02 11:23:30,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:23:30,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:23:30,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:23:31,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:23:31,075 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:23:31,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255649832] [2024-11-02 11:23:31,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255649832] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:23:31,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840092826] [2024-11-02 11:23:31,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:23:31,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:23:31,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24623091-94c9-4efe-a1d1-5626a1f98878/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:23:31,080 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24623091-94c9-4efe-a1d1-5626a1f98878/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:23:31,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24623091-94c9-4efe-a1d1-5626a1f98878/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 11:23:31,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:23:31,620 INFO L255 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-02 11:23:31,626 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:23:31,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:23:31,665 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 11:23:31,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840092826] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:23:31,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 11:23:31,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2024-11-02 11:23:31,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560279002] [2024-11-02 11:23:31,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:23:31,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 11:23:31,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:23:31,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 11:23:31,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-02 11:23:31,670 INFO L87 Difference]: Start difference. First operand 136 states and 168 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:23:31,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:23:31,857 INFO L93 Difference]: Finished difference Result 136 states and 168 transitions. [2024-11-02 11:23:31,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 11:23:31,858 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-02 11:23:31,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:23:31,859 INFO L225 Difference]: With dead ends: 136 [2024-11-02 11:23:31,862 INFO L226 Difference]: Without dead ends: 135 [2024-11-02 11:23:31,862 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-02 11:23:31,864 INFO L432 NwaCegarLoop]: 144 mSDtfsCounter, 1 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 11:23:31,865 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 288 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 11:23:31,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-11-02 11:23:31,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2024-11-02 11:23:31,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 92 states have (on average 1.641304347826087) internal successors, (151), 124 states have internal predecessors, (151), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-02 11:23:31,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 167 transitions. [2024-11-02 11:23:31,883 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 167 transitions. Word has length 6 [2024-11-02 11:23:31,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:23:31,884 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 167 transitions. [2024-11-02 11:23:31,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:23:31,884 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 167 transitions. [2024-11-02 11:23:31,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-02 11:23:31,885 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:23:31,885 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2024-11-02 11:23:31,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24623091-94c9-4efe-a1d1-5626a1f98878/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-02 11:23:32,086 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24623091-94c9-4efe-a1d1-5626a1f98878/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:23:32,087 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_error_msg_and_dieErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_error_msg_and_dieErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_error_msg_and_dieErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2024-11-02 11:23:32,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:23:32,088 INFO L85 PathProgramCache]: Analyzing trace with hash 752015070, now seen corresponding path program 1 times [2024-11-02 11:23:32,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:23:32,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529017118] [2024-11-02 11:23:32,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:23:32,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:23:32,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:23:32,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 11:23:32,355 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:23:32,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529017118] [2024-11-02 11:23:32,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529017118] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:23:32,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:23:32,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 11:23:32,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992328242] [2024-11-02 11:23:32,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:23:32,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:23:32,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:23:32,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:23:32,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:23:32,360 INFO L87 Difference]: Start difference. First operand 135 states and 167 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:23:32,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:23:32,502 INFO L93 Difference]: Finished difference Result 135 states and 167 transitions. [2024-11-02 11:23:32,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:23:32,507 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-02 11:23:32,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:23:32,508 INFO L225 Difference]: With dead ends: 135 [2024-11-02 11:23:32,508 INFO L226 Difference]: Without dead ends: 134 [2024-11-02 11:23:32,509 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:23:32,510 INFO L432 NwaCegarLoop]: 144 mSDtfsCounter, 0 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:23:32,515 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 288 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:23:32,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-11-02 11:23:32,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 132. [2024-11-02 11:23:32,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 90 states have (on average 1.6444444444444444) internal successors, (148), 121 states have internal predecessors, (148), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-02 11:23:32,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 164 transitions. [2024-11-02 11:23:32,536 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 164 transitions. Word has length 7 [2024-11-02 11:23:32,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:23:32,539 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 164 transitions. [2024-11-02 11:23:32,539 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 11:23:32,543 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 164 transitions. [2024-11-02 11:23:32,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-02 11:23:32,544 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:23:32,544 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:23:32,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 11:23:32,544 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_error_msg_and_dieErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_error_msg_and_dieErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_error_msg_and_dieErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2024-11-02 11:23:32,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:23:32,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1362658038, now seen corresponding path program 1 times [2024-11-02 11:23:32,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:23:32,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734963621] [2024-11-02 11:23:32,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:23:32,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:23:32,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:23:33,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:23:33,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:23:33,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734963621] [2024-11-02 11:23:33,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734963621] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:23:33,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415245200] [2024-11-02 11:23:33,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:23:33,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:23:33,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24623091-94c9-4efe-a1d1-5626a1f98878/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:23:33,012 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24623091-94c9-4efe-a1d1-5626a1f98878/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:23:33,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24623091-94c9-4efe-a1d1-5626a1f98878/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 11:23:33,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:23:33,458 INFO L255 TraceCheckSpWp]: Trace formula consists of 925 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-02 11:23:33,460 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:23:33,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 11:23:33,487 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 11:23:33,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415245200] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:23:33,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 11:23:33,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2024-11-02 11:23:33,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793560897] [2024-11-02 11:23:33,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:23:33,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:23:33,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:23:33,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:23:33,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-02 11:23:33,492 INFO L87 Difference]: Start difference. First operand 132 states and 164 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 11:23:33,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:23:33,611 INFO L93 Difference]: Finished difference Result 132 states and 164 transitions. [2024-11-02 11:23:33,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:23:33,611 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2024-11-02 11:23:33,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:23:33,613 INFO L225 Difference]: With dead ends: 132 [2024-11-02 11:23:33,613 INFO L226 Difference]: Without dead ends: 130 [2024-11-02 11:23:33,613 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 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 11:23:33,614 INFO L432 NwaCegarLoop]: 137 mSDtfsCounter, 60 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:23:33,615 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 224 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:23:33,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-11-02 11:23:33,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2024-11-02 11:23:33,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 90 states have (on average 1.6222222222222222) internal successors, (146), 119 states have internal predecessors, (146), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-02 11:23:33,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 162 transitions. [2024-11-02 11:23:33,626 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 162 transitions. Word has length 9 [2024-11-02 11:23:33,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:23:33,631 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 162 transitions. [2024-11-02 11:23:33,631 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 11:23:33,631 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 162 transitions. [2024-11-02 11:23:33,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-02 11:23:33,631 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:23:33,631 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:23:33,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24623091-94c9-4efe-a1d1-5626a1f98878/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-02 11:23:33,832 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24623091-94c9-4efe-a1d1-5626a1f98878/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:23:33,832 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [bb_error_msg_and_dieErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_error_msg_and_dieErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, bb_error_msg_and_dieErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 32 more)] === [2024-11-02 11:23:33,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:23:33,833 INFO L85 PathProgramCache]: Analyzing trace with hash -707273452, now seen corresponding path program 1 times [2024-11-02 11:23:33,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:23:33,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812905908] [2024-11-02 11:23:33,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:23:33,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:23:33,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:23:34,093 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 11:23:34,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:23:34,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812905908] [2024-11-02 11:23:34,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812905908] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:23:34,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564956302] [2024-11-02 11:23:34,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:23:34,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:23:34,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24623091-94c9-4efe-a1d1-5626a1f98878/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:23:34,097 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24623091-94c9-4efe-a1d1-5626a1f98878/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:23:34,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24623091-94c9-4efe-a1d1-5626a1f98878/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 11:23:34,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:23:34,456 INFO L255 TraceCheckSpWp]: Trace formula consists of 926 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-02 11:23:34,457 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:23:34,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:23:34,474 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 11:23:34,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:23:34,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564956302] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 11:23:34,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [359205438] [2024-11-02 11:23:34,539 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-02 11:23:34,541 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 11:23:34,547 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 11:23:34,553 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 11:23:34,554 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs