./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/HenzingerJhalaMajumdarSutre-POPL2002-LockingExample.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc 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_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/HenzingerJhalaMajumdarSutre-POPL2002-LockingExample.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh --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 b7e15211580ea4e53f751b22847dfea4720c9dc42574c861d991d991eb47919b --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 17:33:36,117 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 17:33:36,204 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Overflow-64bit-Taipan_Default.epf [2023-12-02 17:33:36,208 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 17:33:36,209 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 17:33:36,233 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 17:33:36,234 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 17:33:36,234 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 17:33:36,235 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 17:33:36,236 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 17:33:36,236 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 17:33:36,237 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 17:33:36,237 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 17:33:36,238 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 17:33:36,238 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 17:33:36,238 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 17:33:36,239 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 17:33:36,239 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 17:33:36,240 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 17:33:36,240 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 17:33:36,241 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 17:33:36,241 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 17:33:36,242 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 17:33:36,242 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 17:33:36,243 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 17:33:36,243 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 17:33:36,243 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 17:33:36,244 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 17:33:36,244 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 17:33:36,244 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-12-02 17:33:36,245 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 17:33:36,245 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 17:33:36,245 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 17:33:36,246 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 17:33:36,246 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 17:33:36,246 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 17:33:36,246 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:33:36,246 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 17:33:36,247 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 17:33:36,247 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 17:33:36,247 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 17:33:36,247 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 17:33:36,248 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 17:33:36,248 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 17:33:36,248 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 17:33:36,248 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 17:33:36,248 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_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b7e15211580ea4e53f751b22847dfea4720c9dc42574c861d991d991eb47919b [2023-12-02 17:33:36,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 17:33:36,505 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 17:33:36,508 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 17:33:36,509 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 17:33:36,509 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 17:33:36,511 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/termination-crafted-lit/HenzingerJhalaMajumdarSutre-POPL2002-LockingExample.c [2023-12-02 17:33:39,258 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 17:33:39,409 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 17:33:39,410 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/sv-benchmarks/c/termination-crafted-lit/HenzingerJhalaMajumdarSutre-POPL2002-LockingExample.c [2023-12-02 17:33:39,416 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/data/7c979a400/24da67afa3f647dea10fb4ad58345e5f/FLAGe0f723175 [2023-12-02 17:33:39,428 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/data/7c979a400/24da67afa3f647dea10fb4ad58345e5f [2023-12-02 17:33:39,430 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 17:33:39,432 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 17:33:39,433 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 17:33:39,433 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 17:33:39,438 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 17:33:39,439 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:33:39" (1/1) ... [2023-12-02 17:33:39,440 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a5ba8c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:33:39, skipping insertion in model container [2023-12-02 17:33:39,440 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:33:39" (1/1) ... [2023-12-02 17:33:39,461 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 17:33:39,634 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:33:39,640 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 17:33:39,654 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:33:39,666 INFO L206 MainTranslator]: Completed translation [2023-12-02 17:33:39,667 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:33:39 WrapperNode [2023-12-02 17:33:39,667 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 17:33:39,668 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 17:33:39,668 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 17:33:39,668 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 17:33:39,673 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:33:39" (1/1) ... [2023-12-02 17:33:39,676 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:33:39" (1/1) ... [2023-12-02 17:33:39,693 INFO L138 Inliner]: procedures = 6, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 53 [2023-12-02 17:33:39,694 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 17:33:39,694 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 17:33:39,694 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 17:33:39,694 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 17:33:39,701 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:33:39" (1/1) ... [2023-12-02 17:33:39,701 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:33:39" (1/1) ... [2023-12-02 17:33:39,702 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:33:39" (1/1) ... [2023-12-02 17:33:39,702 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:33:39" (1/1) ... [2023-12-02 17:33:39,705 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:33:39" (1/1) ... [2023-12-02 17:33:39,709 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:33:39" (1/1) ... [2023-12-02 17:33:39,710 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:33:39" (1/1) ... [2023-12-02 17:33:39,710 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:33:39" (1/1) ... [2023-12-02 17:33:39,712 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 17:33:39,713 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 17:33:39,713 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 17:33:39,713 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 17:33:39,714 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:33:39" (1/1) ... [2023-12-02 17:33:39,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:33:39,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:33:39,741 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 17:33:39,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 17:33:39,774 INFO L130 BoogieDeclarations]: Found specification of procedure unlock [2023-12-02 17:33:39,774 INFO L138 BoogieDeclarations]: Found implementation of procedure unlock [2023-12-02 17:33:39,774 INFO L130 BoogieDeclarations]: Found specification of procedure lock [2023-12-02 17:33:39,774 INFO L138 BoogieDeclarations]: Found implementation of procedure lock [2023-12-02 17:33:39,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 17:33:39,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 17:33:39,829 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 17:33:39,830 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 17:33:39,947 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 17:33:39,974 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 17:33:39,974 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 17:33:39,976 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:33:39 BoogieIcfgContainer [2023-12-02 17:33:39,976 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 17:33:39,978 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 17:33:39,978 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 17:33:39,981 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 17:33:39,981 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:33:39" (1/3) ... [2023-12-02 17:33:39,982 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62533b3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:33:39, skipping insertion in model container [2023-12-02 17:33:39,982 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:33:39" (2/3) ... [2023-12-02 17:33:39,983 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62533b3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:33:39, skipping insertion in model container [2023-12-02 17:33:39,983 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:33:39" (3/3) ... [2023-12-02 17:33:39,984 INFO L112 eAbstractionObserver]: Analyzing ICFG HenzingerJhalaMajumdarSutre-POPL2002-LockingExample.c [2023-12-02 17:33:40,004 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 17:33:40,004 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-12-02 17:33:40,046 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 17:33:40,052 INFO L357 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, mHoare=true, 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;@2ebe2ae0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 17:33:40,052 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-12-02 17:33:40,056 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 20 states have (on average 1.55) internal successors, (31), 24 states have internal predecessors, (31), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 17:33:40,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 17:33:40,063 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:33:40,063 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:33:40,064 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-12-02 17:33:40,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:33:40,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1589653680, now seen corresponding path program 1 times [2023-12-02 17:33:40,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:33:40,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106453286] [2023-12-02 17:33:40,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:33:40,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:33:40,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:33:40,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:33:40,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:33:40,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106453286] [2023-12-02 17:33:40,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106453286] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:33:40,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:33:40,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:33:40,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92108665] [2023-12-02 17:33:40,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:33:40,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:33:40,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:33:40,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:33:40,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:33:40,267 INFO L87 Difference]: Start difference. First operand has 31 states, 20 states have (on average 1.55) internal successors, (31), 24 states have internal predecessors, (31), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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) [2023-12-02 17:33:40,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:33:40,343 INFO L93 Difference]: Finished difference Result 61 states and 81 transitions. [2023-12-02 17:33:40,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 17:33:40,345 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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 [2023-12-02 17:33:40,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:33:40,351 INFO L225 Difference]: With dead ends: 61 [2023-12-02 17:33:40,351 INFO L226 Difference]: Without dead ends: 38 [2023-12-02 17:33:40,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:33:40,357 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 21 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:33:40,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 113 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:33:40,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-12-02 17:33:40,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2023-12-02 17:33:40,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 21 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 17:33:40,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2023-12-02 17:33:40,387 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 9 [2023-12-02 17:33:40,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:33:40,388 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2023-12-02 17:33:40,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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) [2023-12-02 17:33:40,388 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2023-12-02 17:33:40,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 17:33:40,390 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:33:40,390 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:33:40,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 17:33:40,390 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-12-02 17:33:40,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:33:40,391 INFO L85 PathProgramCache]: Analyzing trace with hash -2034623762, now seen corresponding path program 1 times [2023-12-02 17:33:40,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:33:40,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642182515] [2023-12-02 17:33:40,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:33:40,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:33:40,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:33:40,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:33:40,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:33:40,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642182515] [2023-12-02 17:33:40,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642182515] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:33:40,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:33:40,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:33:40,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152801404] [2023-12-02 17:33:40,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:33:40,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:33:40,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:33:40,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:33:40,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:33:40,452 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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) [2023-12-02 17:33:40,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:33:40,491 INFO L93 Difference]: Finished difference Result 42 states and 55 transitions. [2023-12-02 17:33:40,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 17:33:40,491 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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 10 [2023-12-02 17:33:40,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:33:40,493 INFO L225 Difference]: With dead ends: 42 [2023-12-02 17:33:40,493 INFO L226 Difference]: Without dead ends: 41 [2023-12-02 17:33:40,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:33:40,495 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 17 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:33:40,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 101 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:33:40,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-12-02 17:33:40,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2023-12-02 17:33:40,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 20 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 17:33:40,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2023-12-02 17:33:40,504 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 10 [2023-12-02 17:33:40,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:33:40,505 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2023-12-02 17:33:40,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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) [2023-12-02 17:33:40,505 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2023-12-02 17:33:40,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 17:33:40,506 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:33:40,506 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:33:40,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 17:33:40,507 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-12-02 17:33:40,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:33:40,508 INFO L85 PathProgramCache]: Analyzing trace with hash -555318825, now seen corresponding path program 1 times [2023-12-02 17:33:40,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:33:40,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362654658] [2023-12-02 17:33:40,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:33:40,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:33:40,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:33:40,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:33:40,565 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:33:40,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362654658] [2023-12-02 17:33:40,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362654658] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:33:40,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:33:40,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:33:40,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011574925] [2023-12-02 17:33:40,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:33:40,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:33:40,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:33:40,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:33:40,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:33:40,568 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 17:33:40,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:33:40,597 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2023-12-02 17:33:40,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 17:33:40,598 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 12 [2023-12-02 17:33:40,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:33:40,599 INFO L225 Difference]: With dead ends: 26 [2023-12-02 17:33:40,599 INFO L226 Difference]: Without dead ends: 25 [2023-12-02 17:33:40,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:33:40,601 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 19 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:33:40,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 50 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:33:40,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-12-02 17:33:40,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-12-02 17:33:40,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 17:33:40,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2023-12-02 17:33:40,608 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 12 [2023-12-02 17:33:40,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:33:40,609 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2023-12-02 17:33:40,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 17:33:40,609 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2023-12-02 17:33:40,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 17:33:40,610 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:33:40,610 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:33:40,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 17:33:40,611 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-12-02 17:33:40,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:33:40,612 INFO L85 PathProgramCache]: Analyzing trace with hash -35014294, now seen corresponding path program 1 times [2023-12-02 17:33:40,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:33:40,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129321279] [2023-12-02 17:33:40,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:33:40,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:33:40,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:33:40,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:33:40,661 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:33:40,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129321279] [2023-12-02 17:33:40,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129321279] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:33:40,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:33:40,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:33:40,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040820581] [2023-12-02 17:33:40,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:33:40,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:33:40,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:33:40,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:33:40,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:33:40,665 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 17:33:40,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:33:40,700 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2023-12-02 17:33:40,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 17:33:40,700 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2023-12-02 17:33:40,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:33:40,701 INFO L225 Difference]: With dead ends: 34 [2023-12-02 17:33:40,701 INFO L226 Difference]: Without dead ends: 33 [2023-12-02 17:33:40,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:33:40,703 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:33:40,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 57 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:33:40,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-12-02 17:33:40,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-12-02 17:33:40,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 17:33:40,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2023-12-02 17:33:40,711 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 13 [2023-12-02 17:33:40,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:33:40,712 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2023-12-02 17:33:40,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 17:33:40,712 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2023-12-02 17:33:40,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 17:33:40,713 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:33:40,713 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-12-02 17:33:40,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 17:33:40,713 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-12-02 17:33:40,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:33:40,714 INFO L85 PathProgramCache]: Analyzing trace with hash 194030849, now seen corresponding path program 1 times [2023-12-02 17:33:40,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:33:40,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61556255] [2023-12-02 17:33:40,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:33:40,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:33:40,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:33:40,854 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 17:33:40,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:33:40,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61556255] [2023-12-02 17:33:40,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61556255] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:33:40,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129107849] [2023-12-02 17:33:40,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:33:40,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:33:40,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:33:40,859 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:33:40,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 17:33:40,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:33:40,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 17:33:40,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:33:40,976 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 17:33:40,977 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:33:41,052 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 17:33:41,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129107849] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:33:41,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1403930555] [2023-12-02 17:33:41,071 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 17:33:41,071 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:33:41,074 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:33:41,078 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:33:41,078 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:33:42,132 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 22 for LOIs [2023-12-02 17:33:42,142 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 15 for LOIs [2023-12-02 17:33:42,146 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:33:42,624 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '560#(and (<= 2147483647 |ULTIMATE.start_main_#t~post5#1|) (exists ((|v_ULTIMATE.start_main_#t~nondet4#1_20| Int)) (and (<= |v_ULTIMATE.start_main_#t~nondet4#1_20| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_#t~nondet4#1_20| 2147483648)) (not (= |v_ULTIMATE.start_main_#t~nondet4#1_20| 0)))) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~new~0#1|) (not (= ~LOCK~0 1)))' at error location [2023-12-02 17:33:42,624 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:33:42,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:33:42,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-12-02 17:33:42,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460537904] [2023-12-02 17:33:42,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:33:42,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 17:33:42,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:33:42,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 17:33:42,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2023-12-02 17:33:42,627 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 17:33:42,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:33:42,772 INFO L93 Difference]: Finished difference Result 58 states and 79 transitions. [2023-12-02 17:33:42,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 17:33:42,773 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 25 [2023-12-02 17:33:42,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:33:42,774 INFO L225 Difference]: With dead ends: 58 [2023-12-02 17:33:42,774 INFO L226 Difference]: Without dead ends: 57 [2023-12-02 17:33:42,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2023-12-02 17:33:42,776 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 35 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:33:42,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 91 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:33:42,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-12-02 17:33:42,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-12-02 17:33:42,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 43 states have internal predecessors, (52), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 17:33:42,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 76 transitions. [2023-12-02 17:33:42,787 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 76 transitions. Word has length 25 [2023-12-02 17:33:42,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:33:42,788 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 76 transitions. [2023-12-02 17:33:42,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 17:33:42,788 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 76 transitions. [2023-12-02 17:33:42,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-02 17:33:42,791 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:33:42,791 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1] [2023-12-02 17:33:42,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 17:33:42,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:33:42,996 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-12-02 17:33:42,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:33:42,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1145997510, now seen corresponding path program 2 times [2023-12-02 17:33:42,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:33:42,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545011135] [2023-12-02 17:33:42,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:33:42,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:33:43,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:33:43,253 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 17:33:43,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:33:43,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545011135] [2023-12-02 17:33:43,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545011135] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:33:43,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014232329] [2023-12-02 17:33:43,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:33:43,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:33:43,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:33:43,257 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:33:43,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 17:33:43,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 17:33:43,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:33:43,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 17:33:43,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:33:43,398 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 17:33:43,399 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:33:43,623 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 17:33:43,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014232329] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:33:43,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [483109988] [2023-12-02 17:33:43,625 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 17:33:43,626 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:33:43,626 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:33:43,626 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:33:43,626 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:33:44,344 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 22 for LOIs [2023-12-02 17:33:44,352 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 15 for LOIs [2023-12-02 17:33:44,356 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:33:44,914 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1107#(and (<= 2147483647 |ULTIMATE.start_main_#t~post5#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~new~0#1|) (exists ((|v_ULTIMATE.start_main_#t~nondet4#1_30| Int)) (and (<= 0 (+ |v_ULTIMATE.start_main_#t~nondet4#1_30| 2147483648)) (<= |v_ULTIMATE.start_main_#t~nondet4#1_30| 2147483647) (not (= |v_ULTIMATE.start_main_#t~nondet4#1_30| 0)))) (not (= ~LOCK~0 1)))' at error location [2023-12-02 17:33:44,914 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:33:44,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:33:44,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2023-12-02 17:33:44,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881297870] [2023-12-02 17:33:44,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:33:44,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-02 17:33:44,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:33:44,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-02 17:33:44,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=948, Unknown=0, NotChecked=0, Total=1122 [2023-12-02 17:33:44,918 INFO L87 Difference]: Start difference. First operand 57 states and 76 transitions. Second operand has 22 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 22 states have internal predecessors, (64), 10 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) [2023-12-02 17:33:45,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:33:45,270 INFO L93 Difference]: Finished difference Result 106 states and 148 transitions. [2023-12-02 17:33:45,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-02 17:33:45,271 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 22 states have internal predecessors, (64), 10 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) Word has length 61 [2023-12-02 17:33:45,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:33:45,273 INFO L225 Difference]: With dead ends: 106 [2023-12-02 17:33:45,273 INFO L226 Difference]: Without dead ends: 105 [2023-12-02 17:33:45,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 150 SyntacticMatches, 10 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=349, Invalid=1543, Unknown=0, NotChecked=0, Total=1892 [2023-12-02 17:33:45,282 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 74 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:33:45,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 164 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:33:45,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-12-02 17:33:45,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2023-12-02 17:33:45,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 78 states have (on average 1.205128205128205) internal successors, (94), 79 states have internal predecessors, (94), 24 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-12-02 17:33:45,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 142 transitions. [2023-12-02 17:33:45,298 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 142 transitions. Word has length 61 [2023-12-02 17:33:45,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:33:45,299 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 142 transitions. [2023-12-02 17:33:45,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 22 states have internal predecessors, (64), 10 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) [2023-12-02 17:33:45,299 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 142 transitions. [2023-12-02 17:33:45,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-12-02 17:33:45,302 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:33:45,302 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1] [2023-12-02 17:33:45,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 17:33:45,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:33:45,505 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-12-02 17:33:45,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:33:45,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1931756752, now seen corresponding path program 3 times [2023-12-02 17:33:45,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:33:45,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613219508] [2023-12-02 17:33:45,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:33:45,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:33:45,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:33:46,052 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-12-02 17:33:46,052 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:33:46,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613219508] [2023-12-02 17:33:46,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613219508] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:33:46,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72740472] [2023-12-02 17:33:46,052 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:33:46,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:33:46,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:33:46,054 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:33:46,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 17:33:46,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:33:46,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:33:46,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-02 17:33:46,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:33:46,291 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-12-02 17:33:46,291 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:33:46,905 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-12-02 17:33:46,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72740472] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:33:46,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1760710917] [2023-12-02 17:33:46,908 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 17:33:46,908 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:33:46,908 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:33:46,908 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:33:46,909 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:33:47,468 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 22 for LOIs [2023-12-02 17:33:47,477 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 15 for LOIs [2023-12-02 17:33:47,481 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:33:48,248 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2242#(and (exists ((|v_ULTIMATE.start_main_#t~nondet4#1_46| Int)) (and (<= 0 (+ |v_ULTIMATE.start_main_#t~nondet4#1_46| 2147483648)) (<= |v_ULTIMATE.start_main_#t~nondet4#1_46| 2147483647) (not (= |v_ULTIMATE.start_main_#t~nondet4#1_46| 0)))) (<= 2147483647 |ULTIMATE.start_main_#t~post5#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~new~0#1|) (not (= ~LOCK~0 1)))' at error location [2023-12-02 17:33:48,248 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:33:48,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:33:48,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2023-12-02 17:33:48,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128183064] [2023-12-02 17:33:48,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:33:48,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-12-02 17:33:48,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:33:48,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-12-02 17:33:48,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=606, Invalid=2700, Unknown=0, NotChecked=0, Total=3306 [2023-12-02 17:33:48,254 INFO L87 Difference]: Start difference. First operand 105 states and 142 transitions. Second operand has 46 states, 45 states have (on average 3.022222222222222) internal successors, (136), 46 states have internal predecessors, (136), 22 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 22 states have call predecessors, (44), 22 states have call successors, (44) [2023-12-02 17:33:48,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:33:48,968 INFO L93 Difference]: Finished difference Result 202 states and 286 transitions. [2023-12-02 17:33:48,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-12-02 17:33:48,968 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 3.022222222222222) internal successors, (136), 46 states have internal predecessors, (136), 22 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 22 states have call predecessors, (44), 22 states have call successors, (44) Word has length 133 [2023-12-02 17:33:48,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:33:48,971 INFO L225 Difference]: With dead ends: 202 [2023-12-02 17:33:48,972 INFO L226 Difference]: Without dead ends: 201 [2023-12-02 17:33:48,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 342 SyntacticMatches, 22 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2441 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1387, Invalid=4933, Unknown=0, NotChecked=0, Total=6320 [2023-12-02 17:33:48,975 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 215 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:33:48,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 127 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:33:48,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-12-02 17:33:48,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2023-12-02 17:33:48,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 150 states have (on average 1.1866666666666668) internal successors, (178), 151 states have internal predecessors, (178), 48 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2023-12-02 17:33:48,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 274 transitions. [2023-12-02 17:33:48,998 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 274 transitions. Word has length 133 [2023-12-02 17:33:48,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:33:48,998 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 274 transitions. [2023-12-02 17:33:48,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 3.022222222222222) internal successors, (136), 46 states have internal predecessors, (136), 22 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 22 states have call predecessors, (44), 22 states have call successors, (44) [2023-12-02 17:33:48,999 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 274 transitions. [2023-12-02 17:33:49,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2023-12-02 17:33:49,005 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:33:49,005 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 22, 22, 1, 1, 1] [2023-12-02 17:33:49,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 17:33:49,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:33:49,211 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-12-02 17:33:49,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:33:49,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1702179100, now seen corresponding path program 4 times [2023-12-02 17:33:49,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:33:49,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312743519] [2023-12-02 17:33:49,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:33:49,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:33:49,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:33:51,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3014 backedges. 0 proven. 2002 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2023-12-02 17:33:51,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:33:51,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312743519] [2023-12-02 17:33:51,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312743519] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:33:51,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664298805] [2023-12-02 17:33:51,118 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:33:51,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:33:51,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:33:51,119 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:33:51,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 17:33:51,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:33:51,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 47 conjunts are in the unsatisfiable core [2023-12-02 17:33:51,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:33:51,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3014 backedges. 0 proven. 2002 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2023-12-02 17:33:51,456 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:33:53,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3014 backedges. 0 proven. 2002 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2023-12-02 17:33:53,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664298805] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:33:53,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [910682745] [2023-12-02 17:33:53,338 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 17:33:53,338 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:33:53,339 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:33:53,339 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:33:53,339 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:33:53,724 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 22 for LOIs [2023-12-02 17:33:53,730 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 15 for LOIs [2023-12-02 17:33:53,732 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:33:55,094 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4553#(and (<= 2147483647 |ULTIMATE.start_main_#t~post5#1|) (exists ((|v_ULTIMATE.start_main_#t~nondet4#1_74| Int)) (and (not (= |v_ULTIMATE.start_main_#t~nondet4#1_74| 0)) (<= 0 (+ |v_ULTIMATE.start_main_#t~nondet4#1_74| 2147483648)) (<= |v_ULTIMATE.start_main_#t~nondet4#1_74| 2147483647))) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~new~0#1|) (not (= ~LOCK~0 1)))' at error location [2023-12-02 17:33:55,094 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:33:55,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:33:55,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 93 [2023-12-02 17:33:55,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005399836] [2023-12-02 17:33:55,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:33:55,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2023-12-02 17:33:55,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:33:55,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2023-12-02 17:33:55,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2334, Invalid=8796, Unknown=0, NotChecked=0, Total=11130 [2023-12-02 17:33:55,102 INFO L87 Difference]: Start difference. First operand 201 states and 274 transitions. Second operand has 94 states, 93 states have (on average 3.010752688172043) internal successors, (280), 94 states have internal predecessors, (280), 46 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 46 states have call predecessors, (92), 46 states have call successors, (92) [2023-12-02 17:33:57,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:33:57,205 INFO L93 Difference]: Finished difference Result 394 states and 562 transitions. [2023-12-02 17:33:57,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2023-12-02 17:33:57,206 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 93 states have (on average 3.010752688172043) internal successors, (280), 94 states have internal predecessors, (280), 46 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 46 states have call predecessors, (92), 46 states have call successors, (92) Word has length 277 [2023-12-02 17:33:57,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:33:57,210 INFO L225 Difference]: With dead ends: 394 [2023-12-02 17:33:57,210 INFO L226 Difference]: Without dead ends: 393 [2023-12-02 17:33:57,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 922 GetRequests, 726 SyntacticMatches, 46 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8993 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=5623, Invalid=17329, Unknown=0, NotChecked=0, Total=22952 [2023-12-02 17:33:57,217 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 452 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:33:57,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 241 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 17:33:57,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2023-12-02 17:33:57,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 393. [2023-12-02 17:33:57,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 294 states have (on average 1.1768707482993197) internal successors, (346), 295 states have internal predecessors, (346), 96 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (96), 96 states have call predecessors, (96), 96 states have call successors, (96) [2023-12-02 17:33:57,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 538 transitions. [2023-12-02 17:33:57,246 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 538 transitions. Word has length 277 [2023-12-02 17:33:57,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:33:57,247 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 538 transitions. [2023-12-02 17:33:57,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 93 states have (on average 3.010752688172043) internal successors, (280), 94 states have internal predecessors, (280), 46 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 46 states have call predecessors, (92), 46 states have call successors, (92) [2023-12-02 17:33:57,247 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 538 transitions. [2023-12-02 17:33:57,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2023-12-02 17:33:57,263 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:33:57,263 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 46, 46, 1, 1, 1] [2023-12-02 17:33:57,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 17:33:57,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:33:57,464 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-12-02 17:33:57,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:33:57,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1109644532, now seen corresponding path program 5 times [2023-12-02 17:33:57,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:33:57,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208483354] [2023-12-02 17:33:57,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:33:57,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:33:57,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:34:03,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12926 backedges. 0 proven. 8602 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2023-12-02 17:34:03,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:34:03,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208483354] [2023-12-02 17:34:03,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208483354] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:34:03,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402455897] [2023-12-02 17:34:03,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:34:03,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:34:03,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:34:03,611 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:34:03,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 17:34:04,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2023-12-02 17:34:04,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:34:04,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 1231 conjuncts, 95 conjunts are in the unsatisfiable core [2023-12-02 17:34:04,080 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:34:04,554 INFO L134 CoverageAnalysis]: Checked inductivity of 12926 backedges. 0 proven. 8602 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2023-12-02 17:34:04,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:34:10,688 INFO L134 CoverageAnalysis]: Checked inductivity of 12926 backedges. 0 proven. 8602 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2023-12-02 17:34:10,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402455897] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:34:10,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [188303501] [2023-12-02 17:34:10,691 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 17:34:10,691 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:34:10,692 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:34:10,692 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:34:10,692 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:34:11,018 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 22 for LOIs [2023-12-02 17:34:11,023 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 15 for LOIs [2023-12-02 17:34:11,025 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:34:14,731 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9216#(and (<= 2147483647 |ULTIMATE.start_main_#t~post5#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~new~0#1|) (not (= ~LOCK~0 1)) (exists ((|v_ULTIMATE.start_main_#t~nondet4#1_126| Int)) (and (<= |v_ULTIMATE.start_main_#t~nondet4#1_126| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_#t~nondet4#1_126| 2147483648)) (not (= |v_ULTIMATE.start_main_#t~nondet4#1_126| 0)))))' at error location [2023-12-02 17:34:14,731 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:34:14,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:34:14,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 189 [2023-12-02 17:34:14,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799307010] [2023-12-02 17:34:14,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:34:14,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 190 states [2023-12-02 17:34:14,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:34:14,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2023-12-02 17:34:14,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9246, Invalid=31356, Unknown=0, NotChecked=0, Total=40602 [2023-12-02 17:34:14,746 INFO L87 Difference]: Start difference. First operand 393 states and 538 transitions. Second operand has 190 states, 189 states have (on average 3.005291005291005) internal successors, (568), 190 states have internal predecessors, (568), 94 states have call successors, (188), 1 states have call predecessors, (188), 1 states have return successors, (188), 94 states have call predecessors, (188), 94 states have call successors, (188) [2023-12-02 17:34:22,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:34:22,343 INFO L93 Difference]: Finished difference Result 778 states and 1114 transitions. [2023-12-02 17:34:22,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2023-12-02 17:34:22,345 INFO L78 Accepts]: Start accepts. Automaton has has 190 states, 189 states have (on average 3.005291005291005) internal successors, (568), 190 states have internal predecessors, (568), 94 states have call successors, (188), 1 states have call predecessors, (188), 1 states have return successors, (188), 94 states have call predecessors, (188), 94 states have call successors, (188) Word has length 565 [2023-12-02 17:34:22,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:34:22,352 INFO L225 Difference]: With dead ends: 778 [2023-12-02 17:34:22,352 INFO L226 Difference]: Without dead ends: 777 [2023-12-02 17:34:22,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1882 GetRequests, 1494 SyntacticMatches, 94 SemanticMatches, 294 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34193 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=22735, Invalid=64585, Unknown=0, NotChecked=0, Total=87320 [2023-12-02 17:34:22,358 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 971 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 973 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 17:34:22,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [973 Valid, 383 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 17:34:22,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2023-12-02 17:34:22,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 777. [2023-12-02 17:34:22,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 582 states have (on average 1.1718213058419245) internal successors, (682), 583 states have internal predecessors, (682), 192 states have call successors, (192), 2 states have call predecessors, (192), 2 states have return successors, (192), 192 states have call predecessors, (192), 192 states have call successors, (192) [2023-12-02 17:34:22,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 1066 transitions. [2023-12-02 17:34:22,393 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 1066 transitions. Word has length 565 [2023-12-02 17:34:22,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:34:22,395 INFO L495 AbstractCegarLoop]: Abstraction has 777 states and 1066 transitions. [2023-12-02 17:34:22,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 190 states, 189 states have (on average 3.005291005291005) internal successors, (568), 190 states have internal predecessors, (568), 94 states have call successors, (188), 1 states have call predecessors, (188), 1 states have return successors, (188), 94 states have call predecessors, (188), 94 states have call successors, (188) [2023-12-02 17:34:22,396 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 1066 transitions. [2023-12-02 17:34:22,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1142 [2023-12-02 17:34:22,436 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:34:22,436 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 95, 95, 95, 95, 95, 95, 95, 95, 94, 94, 1, 1, 1] [2023-12-02 17:34:22,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 17:34:22,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:34:22,637 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-12-02 17:34:22,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:34:22,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1934623580, now seen corresponding path program 6 times [2023-12-02 17:34:22,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:34:22,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159634734] [2023-12-02 17:34:22,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:34:22,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:34:22,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:34:51,526 INFO L134 CoverageAnalysis]: Checked inductivity of 53486 backedges. 0 proven. 35626 refuted. 0 times theorem prover too weak. 17860 trivial. 0 not checked. [2023-12-02 17:34:51,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:34:51,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159634734] [2023-12-02 17:34:51,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159634734] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:34:51,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968845854] [2023-12-02 17:34:51,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:34:51,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:34:51,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:34:51,527 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:34:51,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 17:34:55,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:34:55,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:34:55,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 2479 conjuncts, 191 conjunts are in the unsatisfiable core [2023-12-02 17:34:55,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:34:56,666 INFO L134 CoverageAnalysis]: Checked inductivity of 53486 backedges. 0 proven. 35626 refuted. 0 times theorem prover too weak. 17860 trivial. 0 not checked. [2023-12-02 17:34:56,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:35:19,640 INFO L134 CoverageAnalysis]: Checked inductivity of 53486 backedges. 0 proven. 35626 refuted. 0 times theorem prover too weak. 17860 trivial. 0 not checked. [2023-12-02 17:35:19,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968845854] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:35:19,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1359687744] [2023-12-02 17:35:19,643 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 17:35:19,643 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:35:19,643 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:35:19,644 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:35:19,644 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:35:19,944 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 22 for LOIs [2023-12-02 17:35:19,948 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 15 for LOIs [2023-12-02 17:35:19,950 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:35:30,570 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18583#(and (exists ((|v_ULTIMATE.start_main_#t~nondet4#1_226| Int)) (and (<= |v_ULTIMATE.start_main_#t~nondet4#1_226| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_#t~nondet4#1_226| 2147483648)) (not (= |v_ULTIMATE.start_main_#t~nondet4#1_226| 0)))) (<= 2147483647 |ULTIMATE.start_main_#t~post5#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~new~0#1|) (not (= ~LOCK~0 1)))' at error location [2023-12-02 17:35:30,570 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:35:30,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:35:30,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [191, 191, 191] total 381 [2023-12-02 17:35:30,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447314021] [2023-12-02 17:35:30,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:35:30,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 382 states [2023-12-02 17:35:30,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:35:30,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 382 interpolants. [2023-12-02 17:35:30,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36894, Invalid=117948, Unknown=0, NotChecked=0, Total=154842 [2023-12-02 17:35:30,593 INFO L87 Difference]: Start difference. First operand 777 states and 1066 transitions. Second operand has 382 states, 381 states have (on average 3.0026246719160103) internal successors, (1144), 382 states have internal predecessors, (1144), 190 states have call successors, (380), 1 states have call predecessors, (380), 1 states have return successors, (380), 190 states have call predecessors, (380), 190 states have call successors, (380) [2023-12-02 17:36:06,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:36:06,621 INFO L93 Difference]: Finished difference Result 1546 states and 2218 transitions. [2023-12-02 17:36:06,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 382 states. [2023-12-02 17:36:06,623 INFO L78 Accepts]: Start accepts. Automaton has has 382 states, 381 states have (on average 3.0026246719160103) internal successors, (1144), 382 states have internal predecessors, (1144), 190 states have call successors, (380), 1 states have call predecessors, (380), 1 states have return successors, (380), 190 states have call predecessors, (380), 190 states have call successors, (380) Word has length 1141 [2023-12-02 17:36:06,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:36:06,631 INFO L225 Difference]: With dead ends: 1546 [2023-12-02 17:36:06,631 INFO L226 Difference]: Without dead ends: 1545 [2023-12-02 17:36:06,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3802 GetRequests, 3030 SyntacticMatches, 190 SemanticMatches, 582 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132977 ImplicationChecksByTransitivity, 58.9s TimeCoverageRelationStatistics Valid=91519, Invalid=248953, Unknown=0, NotChecked=0, Total=340472 [2023-12-02 17:36:06,649 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 2411 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 1768 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2413 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 1779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-02 17:36:06,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2413 Valid, 567 Invalid, 1779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1768 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-12-02 17:36:06,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2023-12-02 17:36:06,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1545. [2023-12-02 17:36:06,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 1158 states have (on average 1.1692573402417963) internal successors, (1354), 1159 states have internal predecessors, (1354), 384 states have call successors, (384), 2 states have call predecessors, (384), 2 states have return successors, (384), 384 states have call predecessors, (384), 384 states have call successors, (384) [2023-12-02 17:36:06,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 2122 transitions. [2023-12-02 17:36:06,697 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 2122 transitions. Word has length 1141 [2023-12-02 17:36:06,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:36:06,699 INFO L495 AbstractCegarLoop]: Abstraction has 1545 states and 2122 transitions. [2023-12-02 17:36:06,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 382 states, 381 states have (on average 3.0026246719160103) internal successors, (1144), 382 states have internal predecessors, (1144), 190 states have call successors, (380), 1 states have call predecessors, (380), 1 states have return successors, (380), 190 states have call predecessors, (380), 190 states have call successors, (380) [2023-12-02 17:36:06,701 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 2122 transitions. [2023-12-02 17:36:06,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2294 [2023-12-02 17:36:06,732 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:36:06,733 INFO L195 NwaCegarLoop]: trace histogram [191, 191, 191, 191, 191, 191, 191, 191, 191, 191, 190, 190, 1, 1, 1] [2023-12-02 17:36:06,741 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 17:36:06,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 17:36:06,934 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-12-02 17:36:06,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:36:06,935 INFO L85 PathProgramCache]: Analyzing trace with hash 2138846204, now seen corresponding path program 7 times [2023-12-02 17:36:06,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:36:06,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945275869] [2023-12-02 17:36:06,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:36:06,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:36:07,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:39:07,431 INFO L134 CoverageAnalysis]: Checked inductivity of 217550 backedges. 0 proven. 144970 refuted. 0 times theorem prover too weak. 72580 trivial. 0 not checked. [2023-12-02 17:39:07,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:39:07,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945275869] [2023-12-02 17:39:07,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945275869] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:39:07,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414660269] [2023-12-02 17:39:07,432 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:39:07,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:39:07,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:39:07,433 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:39:07,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 17:39:08,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:39:08,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 4975 conjuncts, 383 conjunts are in the unsatisfiable core [2023-12-02 17:39:08,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:39:09,690 INFO L134 CoverageAnalysis]: Checked inductivity of 217550 backedges. 0 proven. 144970 refuted. 0 times theorem prover too weak. 72580 trivial. 0 not checked. [2023-12-02 17:39:09,690 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:40:41,866 INFO L134 CoverageAnalysis]: Checked inductivity of 217550 backedges. 0 proven. 144970 refuted. 0 times theorem prover too weak. 72580 trivial. 0 not checked. [2023-12-02 17:40:41,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414660269] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:40:41,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1731042042] [2023-12-02 17:40:41,868 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 17:40:41,868 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:40:41,869 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:40:41,869 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:40:41,869 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:40:42,187 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 22 for LOIs [2023-12-02 17:40:42,191 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 15 for LOIs [2023-12-02 17:40:42,193 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:41:19,807 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '37358#(and (exists ((|v_ULTIMATE.start_main_#t~nondet4#1_422| Int)) (and (<= 0 (+ |v_ULTIMATE.start_main_#t~nondet4#1_422| 2147483648)) (<= |v_ULTIMATE.start_main_#t~nondet4#1_422| 2147483647) (not (= |v_ULTIMATE.start_main_#t~nondet4#1_422| 0)))) (<= 2147483647 |ULTIMATE.start_main_#t~post5#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~new~0#1|) (not (= ~LOCK~0 1)))' at error location [2023-12-02 17:41:19,807 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:41:19,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:41:19,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [383, 383, 383] total 765 [2023-12-02 17:41:19,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510202706] [2023-12-02 17:41:19,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:41:19,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 766 states [2023-12-02 17:41:19,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:41:19,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 766 interpolants. [2023-12-02 17:41:19,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147486, Invalid=457020, Unknown=0, NotChecked=0, Total=604506 [2023-12-02 17:41:19,880 INFO L87 Difference]: Start difference. First operand 1545 states and 2122 transitions. Second operand has 766 states, 765 states have (on average 3.0013071895424837) internal successors, (2296), 766 states have internal predecessors, (2296), 382 states have call successors, (764), 1 states have call predecessors, (764), 1 states have return successors, (764), 382 states have call predecessors, (764), 382 states have call successors, (764) [2023-12-02 17:45:51,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:45:51,888 INFO L93 Difference]: Finished difference Result 3082 states and 4426 transitions. [2023-12-02 17:45:51,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 766 states. [2023-12-02 17:45:51,892 INFO L78 Accepts]: Start accepts. Automaton has has 766 states, 765 states have (on average 3.0013071895424837) internal successors, (2296), 766 states have internal predecessors, (2296), 382 states have call successors, (764), 1 states have call predecessors, (764), 1 states have return successors, (764), 382 states have call predecessors, (764), 382 states have call successors, (764) Word has length 2293 [2023-12-02 17:45:51,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:45:51,917 INFO L225 Difference]: With dead ends: 3082 [2023-12-02 17:45:51,917 INFO L226 Difference]: Without dead ends: 3081 [2023-12-02 17:45:52,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7642 GetRequests, 6102 SyntacticMatches, 382 SemanticMatches, 1158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524081 ImplicationChecksByTransitivity, 230.5s TimeCoverageRelationStatistics Valid=367327, Invalid=977113, Unknown=0, NotChecked=0, Total=1344440 [2023-12-02 17:45:52,007 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 5801 mSDsluCounter, 889 mSDsCounter, 0 mSdLazyCounter, 3483 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5803 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 3494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-12-02 17:45:52,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5803 Valid, 913 Invalid, 3494 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [11 Valid, 3483 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-12-02 17:45:52,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3081 states. [2023-12-02 17:45:52,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3081 to 3081. [2023-12-02 17:45:52,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3081 states, 2310 states have (on average 1.1679653679653679) internal successors, (2698), 2311 states have internal predecessors, (2698), 768 states have call successors, (768), 2 states have call predecessors, (768), 2 states have return successors, (768), 768 states have call predecessors, (768), 768 states have call successors, (768) [2023-12-02 17:45:52,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3081 states to 3081 states and 4234 transitions. [2023-12-02 17:45:52,146 INFO L78 Accepts]: Start accepts. Automaton has 3081 states and 4234 transitions. Word has length 2293 [2023-12-02 17:45:52,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:45:52,151 INFO L495 AbstractCegarLoop]: Abstraction has 3081 states and 4234 transitions. [2023-12-02 17:45:52,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 766 states, 765 states have (on average 3.0013071895424837) internal successors, (2296), 766 states have internal predecessors, (2296), 382 states have call successors, (764), 1 states have call predecessors, (764), 1 states have return successors, (764), 382 states have call predecessors, (764), 382 states have call successors, (764) [2023-12-02 17:45:52,155 INFO L276 IsEmpty]: Start isEmpty. Operand 3081 states and 4234 transitions. [2023-12-02 17:45:52,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4598 [2023-12-02 17:45:52,325 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:45:52,327 INFO L195 NwaCegarLoop]: trace histogram [383, 383, 383, 383, 383, 383, 383, 383, 383, 383, 382, 382, 1, 1, 1] [2023-12-02 17:45:52,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-02 17:45:52,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e471df3-0090-42d7-92d1-166d78ec12c0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:45:52,528 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-12-02 17:45:52,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:45:52,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1290179900, now seen corresponding path program 8 times [2023-12-02 17:45:52,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:45:52,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460028650] [2023-12-02 17:45:52,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:45:52,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:45:55,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat