./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/zonotope_3.c.v+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/zonotope_3.c.v+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8a7308dc5f86f1f4eda090a45a8f84359680ddfad7d17e2c5273bd494b2cbe5e --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 01:19:11,292 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 01:19:11,405 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 01:19:11,412 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 01:19:11,414 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 01:19:11,452 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 01:19:11,453 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 01:19:11,453 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 01:19:11,454 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 01:19:11,456 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 01:19:11,457 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 01:19:11,458 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 01:19:11,458 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 01:19:11,458 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 01:19:11,459 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 01:19:11,459 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 01:19:11,459 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 01:19:11,460 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 01:19:11,460 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 01:19:11,460 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 01:19:11,461 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 01:19:11,466 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 01:19:11,467 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 01:19:11,467 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 01:19:11,467 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 01:19:11,469 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 01:19:11,469 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 01:19:11,469 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 01:19:11,470 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 01:19:11,470 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 01:19:11,471 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 01:19:11,471 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 01:19:11,472 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 01:19:11,472 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 01:19:11,472 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 01:19:11,473 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 01:19:11,473 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 01:19:11,473 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 01:19:11,473 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 01:19:11,474 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 01:19:11,474 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 01:19:11,474 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 01:19:11,475 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 01:19:11,475 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 01:19:11,476 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 01:19:11,476 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 01:19:11,477 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 01:19:11,477 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_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8a7308dc5f86f1f4eda090a45a8f84359680ddfad7d17e2c5273bd494b2cbe5e [2024-11-09 01:19:11,737 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 01:19:11,764 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 01:19:11,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 01:19:11,770 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 01:19:11,771 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 01:19:11,772 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/float-benchs/zonotope_3.c.v+lhb-reducer.c Unable to find full path for "g++" [2024-11-09 01:19:13,900 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 01:19:14,177 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 01:19:14,178 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/sv-benchmarks/c/float-benchs/zonotope_3.c.v+lhb-reducer.c [2024-11-09 01:19:14,189 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/data/e9d119927/66cf4853cf7e4fc49adb1164d002d1cb/FLAG44727b9b4 [2024-11-09 01:19:14,208 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/data/e9d119927/66cf4853cf7e4fc49adb1164d002d1cb [2024-11-09 01:19:14,210 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 01:19:14,212 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 01:19:14,213 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 01:19:14,214 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 01:19:14,220 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 01:19:14,221 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:19:14" (1/1) ... [2024-11-09 01:19:14,222 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b43cf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:19:14, skipping insertion in model container [2024-11-09 01:19:14,222 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:19:14" (1/1) ... [2024-11-09 01:19:14,301 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 01:19:14,573 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/sv-benchmarks/c/float-benchs/zonotope_3.c.v+lhb-reducer.c[12131,12144] [2024-11-09 01:19:14,589 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 01:19:14,616 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 01:19:14,681 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/sv-benchmarks/c/float-benchs/zonotope_3.c.v+lhb-reducer.c[12131,12144] [2024-11-09 01:19:14,689 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 01:19:14,709 INFO L204 MainTranslator]: Completed translation [2024-11-09 01:19:14,709 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:19:14 WrapperNode [2024-11-09 01:19:14,710 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 01:19:14,711 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 01:19:14,711 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 01:19:14,711 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 01:19:14,719 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:19:14" (1/1) ... [2024-11-09 01:19:14,731 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:19:14" (1/1) ... [2024-11-09 01:19:14,766 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 613 [2024-11-09 01:19:14,767 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 01:19:14,767 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 01:19:14,768 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 01:19:14,768 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 01:19:14,778 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:19:14" (1/1) ... [2024-11-09 01:19:14,778 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:19:14" (1/1) ... [2024-11-09 01:19:14,782 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:19:14" (1/1) ... [2024-11-09 01:19:14,782 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:19:14" (1/1) ... [2024-11-09 01:19:14,794 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:19:14" (1/1) ... [2024-11-09 01:19:14,798 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:19:14" (1/1) ... [2024-11-09 01:19:14,800 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:19:14" (1/1) ... [2024-11-09 01:19:14,802 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:19:14" (1/1) ... [2024-11-09 01:19:14,806 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 01:19:14,807 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 01:19:14,808 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 01:19:14,808 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 01:19:14,809 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:19:14" (1/1) ... [2024-11-09 01:19:14,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 01:19:14,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:19:14,842 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 01:19:14,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 01:19:14,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 01:19:14,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 01:19:14,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 01:19:14,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 01:19:14,986 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 01:19:14,988 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 01:19:15,386 INFO L? ?]: Removed 179 outVars from TransFormulas that were not future-live. [2024-11-09 01:19:15,386 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 01:19:15,451 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 01:19:15,454 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 01:19:15,455 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:19:15 BoogieIcfgContainer [2024-11-09 01:19:15,455 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 01:19:15,458 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 01:19:15,458 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 01:19:15,463 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 01:19:15,463 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 01:19:14" (1/3) ... [2024-11-09 01:19:15,464 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bd4ad4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:19:15, skipping insertion in model container [2024-11-09 01:19:15,466 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:19:14" (2/3) ... [2024-11-09 01:19:15,466 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bd4ad4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:19:15, skipping insertion in model container [2024-11-09 01:19:15,466 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:19:15" (3/3) ... [2024-11-09 01:19:15,468 INFO L112 eAbstractionObserver]: Analyzing ICFG zonotope_3.c.v+lhb-reducer.c [2024-11-09 01:19:15,487 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 01:19:15,488 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 01:19:15,559 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 01:19:15,570 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@17b6fe9a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 01:19:15,570 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 01:19:15,577 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 50 states have (on average 1.88) internal successors, (94), 51 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:19:15,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-09 01:19:15,584 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:19:15,585 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:19:15,585 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:19:15,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:19:15,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1668661496, now seen corresponding path program 1 times [2024-11-09 01:19:15,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:19:15,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182459476] [2024-11-09 01:19:15,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:19:15,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:19:15,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:19:16,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:19:16,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:19:16,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182459476] [2024-11-09 01:19:16,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182459476] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:19:16,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:19:16,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 01:19:16,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090655538] [2024-11-09 01:19:16,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:19:16,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 01:19:16,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:19:16,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 01:19:16,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 01:19:16,144 INFO L87 Difference]: Start difference. First operand has 52 states, 50 states have (on average 1.88) internal successors, (94), 51 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:19:16,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:19:16,230 INFO L93 Difference]: Finished difference Result 58 states and 100 transitions. [2024-11-09 01:19:16,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 01:19:16,234 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2024-11-09 01:19:16,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:19:16,244 INFO L225 Difference]: With dead ends: 58 [2024-11-09 01:19:16,244 INFO L226 Difference]: Without dead ends: 50 [2024-11-09 01:19:16,247 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 01:19:16,251 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 0 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:19:16,252 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 342 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:19:16,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-09 01:19:16,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-11-09 01:19:16,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:19:16,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2024-11-09 01:19:16,287 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 44 [2024-11-09 01:19:16,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:19:16,287 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2024-11-09 01:19:16,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:19:16,288 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2024-11-09 01:19:16,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-09 01:19:16,289 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:19:16,289 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:19:16,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 01:19:16,290 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:19:16,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:19:16,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1685672157, now seen corresponding path program 1 times [2024-11-09 01:19:16,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:19:16,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565493862] [2024-11-09 01:19:16,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:19:16,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:19:16,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:19:16,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:19:16,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:19:16,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565493862] [2024-11-09 01:19:16,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565493862] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:19:16,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:19:16,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-09 01:19:16,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300459349] [2024-11-09 01:19:16,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:19:16,803 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 01:19:16,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:19:16,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 01:19:16,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2024-11-09 01:19:16,807 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:19:16,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:19:16,911 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2024-11-09 01:19:16,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 01:19:16,914 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2024-11-09 01:19:16,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:19:16,915 INFO L225 Difference]: With dead ends: 63 [2024-11-09 01:19:16,916 INFO L226 Difference]: Without dead ends: 56 [2024-11-09 01:19:16,917 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2024-11-09 01:19:16,918 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 6 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:19:16,920 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 109 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:19:16,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-09 01:19:16,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2024-11-09 01:19:16,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:19:16,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2024-11-09 01:19:16,932 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 44 [2024-11-09 01:19:16,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:19:16,933 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2024-11-09 01:19:16,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:19:16,933 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2024-11-09 01:19:16,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-09 01:19:16,934 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:19:16,934 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:19:16,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 01:19:16,935 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:19:16,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:19:16,936 INFO L85 PathProgramCache]: Analyzing trace with hash 894822493, now seen corresponding path program 1 times [2024-11-09 01:19:16,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:19:16,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195134819] [2024-11-09 01:19:16,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:19:16,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:19:16,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:19:17,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:19:17,038 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:19:17,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195134819] [2024-11-09 01:19:17,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195134819] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:19:17,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:19:17,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 01:19:17,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308142974] [2024-11-09 01:19:17,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:19:17,041 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:19:17,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:19:17,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:19:17,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:19:17,043 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:19:17,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:19:17,059 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2024-11-09 01:19:17,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:19:17,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2024-11-09 01:19:17,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:19:17,062 INFO L225 Difference]: With dead ends: 66 [2024-11-09 01:19:17,062 INFO L226 Difference]: Without dead ends: 51 [2024-11-09 01:19:17,063 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:19:17,065 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 01:19:17,067 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 01:19:17,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-09 01:19:17,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-11-09 01:19:17,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:19:17,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2024-11-09 01:19:17,076 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 49 [2024-11-09 01:19:17,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:19:17,077 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2024-11-09 01:19:17,077 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:19:17,079 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2024-11-09 01:19:17,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-09 01:19:17,080 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:19:17,080 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:19:17,080 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 01:19:17,083 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:19:17,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:19:17,084 INFO L85 PathProgramCache]: Analyzing trace with hash 442233218, now seen corresponding path program 1 times [2024-11-09 01:19:17,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:19:17,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558122271] [2024-11-09 01:19:17,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:19:17,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:19:17,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:19:17,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:19:17,470 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:19:17,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558122271] [2024-11-09 01:19:17,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558122271] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:19:17,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989900926] [2024-11-09 01:19:17,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:19:17,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:19:17,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:19:17,473 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:19:17,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 01:19:17,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:19:17,733 INFO L255 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 01:19:17,745 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:19:17,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:19:17,922 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:19:18,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:19:18,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989900926] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:19:18,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [763051288] [2024-11-09 01:19:18,376 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2024-11-09 01:19:18,376 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:19:18,382 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:19:18,389 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:19:18,390 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:19:20,261 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:19:24,844 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '730#(and (= ~__tmp_120439_1~0 1) (<= 1 |#StackHeapBarrier|) (= ~__return_120502~0 0) (= ~__return_main~0 0))' at error location [2024-11-09 01:19:24,844 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:19:24,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:19:24,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2024-11-09 01:19:24,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797799843] [2024-11-09 01:19:24,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:19:24,845 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-09 01:19:24,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:19:24,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-09 01:19:24,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=693, Invalid=1659, Unknown=0, NotChecked=0, Total=2352 [2024-11-09 01:19:24,848 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 25 states, 25 states have (on average 3.92) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:19:24,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:19:24,986 INFO L93 Difference]: Finished difference Result 118 states and 131 transitions. [2024-11-09 01:19:24,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-09 01:19:24,987 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.92) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2024-11-09 01:19:24,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:19:24,988 INFO L225 Difference]: With dead ends: 118 [2024-11-09 01:19:24,988 INFO L226 Difference]: Without dead ends: 111 [2024-11-09 01:19:24,989 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=693, Invalid=1659, Unknown=0, NotChecked=0, Total=2352 [2024-11-09 01:19:24,990 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 105 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:19:24,991 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 147 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:19:24,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-09 01:19:24,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2024-11-09 01:19:24,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:19:24,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2024-11-09 01:19:24,998 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 49 [2024-11-09 01:19:24,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:19:24,999 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2024-11-09 01:19:24,999 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.92) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:19:24,999 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2024-11-09 01:19:25,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-11-09 01:19:25,001 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:19:25,001 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:19:25,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 01:19:25,202 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:19:25,202 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:19:25,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:19:25,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1363671358, now seen corresponding path program 2 times [2024-11-09 01:19:25,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:19:25,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616355962] [2024-11-09 01:19:25,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:19:25,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:19:25,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:19:26,043 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:19:26,043 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:19:26,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616355962] [2024-11-09 01:19:26,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616355962] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:19:26,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938609745] [2024-11-09 01:19:26,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:19:26,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:19:26,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:19:26,046 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:19:26,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 01:19:26,415 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2024-11-09 01:19:26,415 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:19:26,419 INFO L255 TraceCheckSpWp]: Trace formula consists of 940 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-09 01:19:26,424 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:19:26,597 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:19:26,597 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:19:27,534 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:19:27,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938609745] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:19:27,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1426913966] [2024-11-09 01:19:27,537 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2024-11-09 01:19:27,537 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:19:27,538 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:19:27,538 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:19:27,538 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:19:28,724 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:19:33,215 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1680#(and (= ~__tmp_120439_1~0 1) (<= 1 |#StackHeapBarrier|) (= ~__return_120502~0 0) (= ~__return_main~0 0))' at error location [2024-11-09 01:19:33,215 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:19:33,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:19:33,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2024-11-09 01:19:33,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351527267] [2024-11-09 01:19:33,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:19:33,216 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-09 01:19:33,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:19:33,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-09 01:19:33,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2024-11-09 01:19:33,220 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand has 49 states, 49 states have (on average 4.448979591836735) internal successors, (218), 48 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:19:33,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:19:33,509 INFO L93 Difference]: Finished difference Result 238 states and 263 transitions. [2024-11-09 01:19:33,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-09 01:19:33,510 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.448979591836735) internal successors, (218), 48 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2024-11-09 01:19:33,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:19:33,514 INFO L225 Difference]: With dead ends: 238 [2024-11-09 01:19:33,514 INFO L226 Difference]: Without dead ends: 231 [2024-11-09 01:19:33,516 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2320 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2024-11-09 01:19:33,517 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 83 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 01:19:33,519 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 218 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 01:19:33,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-11-09 01:19:33,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2024-11-09 01:19:33,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.008695652173913) internal successors, (232), 230 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:19:33,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 232 transitions. [2024-11-09 01:19:33,534 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 232 transitions. Word has length 109 [2024-11-09 01:19:33,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:19:33,534 INFO L471 AbstractCegarLoop]: Abstraction has 231 states and 232 transitions. [2024-11-09 01:19:33,535 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.448979591836735) internal successors, (218), 48 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:19:33,535 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 232 transitions. [2024-11-09 01:19:33,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2024-11-09 01:19:33,540 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:19:33,540 INFO L215 NwaCegarLoop]: trace histogram [38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:19:33,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 01:19:33,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:19:33,744 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:19:33,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:19:33,745 INFO L85 PathProgramCache]: Analyzing trace with hash 964170050, now seen corresponding path program 3 times [2024-11-09 01:19:33,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:19:33,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293779555] [2024-11-09 01:19:33,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:19:33,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:19:33,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:19:36,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:19:36,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:19:36,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293779555] [2024-11-09 01:19:36,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293779555] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:19:36,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700130594] [2024-11-09 01:19:36,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 01:19:36,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:19:36,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:19:36,650 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:19:36,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 01:19:37,225 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 01:19:37,225 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:19:37,231 INFO L255 TraceCheckSpWp]: Trace formula consists of 1900 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-09 01:19:37,240 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:19:37,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:19:37,563 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:19:41,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:19:41,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700130594] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:19:41,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [632297650] [2024-11-09 01:19:41,196 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2024-11-09 01:19:41,196 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:19:41,198 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:19:41,198 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:19:41,198 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:19:42,195 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:19:46,434 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3638#(and (= ~__tmp_120439_1~0 1) (<= 1 |#StackHeapBarrier|) (= ~__return_120502~0 0) (= ~__return_main~0 0))' at error location [2024-11-09 01:19:46,434 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:19:46,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:19:46,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2024-11-09 01:19:46,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193905897] [2024-11-09 01:19:46,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:19:46,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2024-11-09 01:19:46,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:19:46,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2024-11-09 01:19:46,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6345, Invalid=8175, Unknown=0, NotChecked=0, Total=14520 [2024-11-09 01:19:46,443 INFO L87 Difference]: Start difference. First operand 231 states and 232 transitions. Second operand has 97 states, 97 states have (on average 4.721649484536083) internal successors, (458), 96 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:19:47,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:19:47,129 INFO L93 Difference]: Finished difference Result 478 states and 527 transitions. [2024-11-09 01:19:47,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-11-09 01:19:47,129 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 4.721649484536083) internal successors, (458), 96 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 229 [2024-11-09 01:19:47,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:19:47,131 INFO L225 Difference]: With dead ends: 478 [2024-11-09 01:19:47,132 INFO L226 Difference]: Without dead ends: 471 [2024-11-09 01:19:47,134 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 733 GetRequests, 614 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4576 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=6345, Invalid=8175, Unknown=0, NotChecked=0, Total=14520 [2024-11-09 01:19:47,135 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 65 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 01:19:47,136 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 366 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 01:19:47,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2024-11-09 01:19:47,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 471. [2024-11-09 01:19:47,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.004255319148936) internal successors, (472), 470 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:19:47,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 472 transitions. [2024-11-09 01:19:47,161 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 472 transitions. Word has length 229 [2024-11-09 01:19:47,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:19:47,161 INFO L471 AbstractCegarLoop]: Abstraction has 471 states and 472 transitions. [2024-11-09 01:19:47,162 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 4.721649484536083) internal successors, (458), 96 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:19:47,162 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 472 transitions. [2024-11-09 01:19:47,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2024-11-09 01:19:47,170 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:19:47,171 INFO L215 NwaCegarLoop]: trace histogram [86, 85, 85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:19:47,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 01:19:47,371 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-09 01:19:47,372 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:19:47,372 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:19:47,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1138206274, now seen corresponding path program 4 times [2024-11-09 01:19:47,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:19:47,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225781609] [2024-11-09 01:19:47,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:19:47,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:19:47,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:19:57,008 INFO L134 CoverageAnalysis]: Checked inductivity of 18020 backedges. 0 proven. 18020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:19:57,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:19:57,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225781609] [2024-11-09 01:19:57,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225781609] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:19:57,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724061484] [2024-11-09 01:19:57,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 01:19:57,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:19:57,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:19:57,010 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:19:57,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 01:19:58,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:19:58,112 INFO L255 TraceCheckSpWp]: Trace formula consists of 3820 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-11-09 01:19:58,121 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:19:58,746 INFO L134 CoverageAnalysis]: Checked inductivity of 18020 backedges. 0 proven. 18020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:19:58,746 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:20:10,563 INFO L134 CoverageAnalysis]: Checked inductivity of 18020 backedges. 0 proven. 18020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:20:10,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724061484] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:20:10,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [528874830] [2024-11-09 01:20:10,567 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2024-11-09 01:20:10,567 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:20:10,567 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:20:10,568 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:20:10,568 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:20:11,478 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:20:16,092 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7612#(and (= ~__tmp_120439_1~0 1) (<= 1 |#StackHeapBarrier|) (= ~__return_120502~0 0) (= ~__return_main~0 0))' at error location [2024-11-09 01:20:16,092 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:20:16,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:20:16,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2024-11-09 01:20:16,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834010164] [2024-11-09 01:20:16,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:20:16,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2024-11-09 01:20:16,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:20:16,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2024-11-09 01:20:16,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21945, Invalid=24927, Unknown=0, NotChecked=0, Total=46872 [2024-11-09 01:20:16,108 INFO L87 Difference]: Start difference. First operand 471 states and 472 transitions. Second operand has 193 states, 193 states have (on average 4.860103626943006) internal successors, (938), 192 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:20:18,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:20:18,704 INFO L93 Difference]: Finished difference Result 958 states and 1055 transitions. [2024-11-09 01:20:18,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2024-11-09 01:20:18,706 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 4.860103626943006) internal successors, (938), 192 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 469 [2024-11-09 01:20:18,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:20:18,713 INFO L225 Difference]: With dead ends: 958 [2024-11-09 01:20:18,713 INFO L226 Difference]: Without dead ends: 951 [2024-11-09 01:20:18,718 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1501 GetRequests, 1286 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9088 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=21945, Invalid=24927, Unknown=0, NotChecked=0, Total=46872 [2024-11-09 01:20:18,719 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 113 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 01:20:18,719 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 629 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 01:20:18,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2024-11-09 01:20:18,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 951. [2024-11-09 01:20:18,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 950 states have (on average 1.0021052631578948) internal successors, (952), 950 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:20:18,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 952 transitions. [2024-11-09 01:20:18,745 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 952 transitions. Word has length 469 [2024-11-09 01:20:18,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:20:18,747 INFO L471 AbstractCegarLoop]: Abstraction has 951 states and 952 transitions. [2024-11-09 01:20:18,747 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 4.860103626943006) internal successors, (938), 192 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:20:18,748 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 952 transitions. [2024-11-09 01:20:18,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 950 [2024-11-09 01:20:18,779 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:20:18,780 INFO L215 NwaCegarLoop]: trace histogram [182, 181, 181, 181, 181, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:20:18,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 01:20:18,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-09 01:20:18,981 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:20:18,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:20:18,981 INFO L85 PathProgramCache]: Analyzing trace with hash -770387902, now seen corresponding path program 5 times [2024-11-09 01:20:18,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:20:18,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390943701] [2024-11-09 01:20:18,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:20:18,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:20:19,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:20:54,901 INFO L134 CoverageAnalysis]: Checked inductivity of 81812 backedges. 0 proven. 81812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:20:54,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:20:54,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390943701] [2024-11-09 01:20:54,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390943701] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:20:54,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65050329] [2024-11-09 01:20:54,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:20:54,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:20:54,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:20:54,905 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:20:54,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 01:20:58,608 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 182 check-sat command(s) [2024-11-09 01:20:58,608 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:20:58,642 INFO L255 TraceCheckSpWp]: Trace formula consists of 7660 conjuncts, 192 conjuncts are in the unsatisfiable core [2024-11-09 01:20:58,663 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:20:59,782 INFO L134 CoverageAnalysis]: Checked inductivity of 81812 backedges. 0 proven. 81812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:20:59,782 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:21:47,886 INFO L134 CoverageAnalysis]: Checked inductivity of 81812 backedges. 0 proven. 81812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:21:47,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65050329] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:21:47,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1568326694] [2024-11-09 01:21:47,889 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2024-11-09 01:21:47,889 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:21:47,890 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:21:47,890 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:21:47,890 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:21:48,901 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:21:53,500 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15618#(and (= ~__tmp_120439_1~0 1) (<= 1 |#StackHeapBarrier|) (= ~__return_120502~0 0) (= ~__return_main~0 0))' at error location [2024-11-09 01:21:53,500 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:21:53,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:21:53,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 384 [2024-11-09 01:21:53,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389677912] [2024-11-09 01:21:53,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:21:53,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2024-11-09 01:21:53,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:21:53,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2024-11-09 01:21:53,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80793, Invalid=86079, Unknown=0, NotChecked=0, Total=166872 [2024-11-09 01:21:53,542 INFO L87 Difference]: Start difference. First operand 951 states and 952 transitions. Second operand has 385 states, 385 states have (on average 4.92987012987013) internal successors, (1898), 384 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:22:07,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:22:07,003 INFO L93 Difference]: Finished difference Result 1918 states and 2111 transitions. [2024-11-09 01:22:07,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2024-11-09 01:22:07,004 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 4.92987012987013) internal successors, (1898), 384 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 949 [2024-11-09 01:22:07,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:22:07,011 INFO L225 Difference]: With dead ends: 1918 [2024-11-09 01:22:07,011 INFO L226 Difference]: Without dead ends: 1911 [2024-11-09 01:22:07,020 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3037 GetRequests, 2630 SyntacticMatches, 0 SemanticMatches, 407 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18112 ImplicationChecksByTransitivity, 66.4s TimeCoverageRelationStatistics Valid=80793, Invalid=86079, Unknown=0, NotChecked=0, Total=166872 [2024-11-09 01:22:07,021 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 83 mSDsluCounter, 1235 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:22:07,022 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 1264 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 01:22:07,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2024-11-09 01:22:07,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1911. [2024-11-09 01:22:07,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1910 states have (on average 1.0010471204188482) internal successors, (1912), 1910 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:22:07,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 1912 transitions. [2024-11-09 01:22:07,055 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 1912 transitions. Word has length 949 [2024-11-09 01:22:07,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:22:07,057 INFO L471 AbstractCegarLoop]: Abstraction has 1911 states and 1912 transitions. [2024-11-09 01:22:07,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 4.92987012987013) internal successors, (1898), 384 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:22:07,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 1912 transitions. [2024-11-09 01:22:07,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1910 [2024-11-09 01:22:07,202 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:22:07,202 INFO L215 NwaCegarLoop]: trace histogram [374, 373, 373, 373, 373, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:22:07,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 01:22:07,403 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:22:07,403 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:22:07,404 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:22:07,404 INFO L85 PathProgramCache]: Analyzing trace with hash 75965506, now seen corresponding path program 6 times [2024-11-09 01:22:07,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:22:07,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305705099] [2024-11-09 01:22:07,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:22:07,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:22:09,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:25:03,455 INFO L134 CoverageAnalysis]: Checked inductivity of 347636 backedges. 0 proven. 347636 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:25:03,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:25:03,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305705099] [2024-11-09 01:25:03,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305705099] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:25:03,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426545161] [2024-11-09 01:25:03,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 01:25:03,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:25:03,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:25:03,457 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:25:03,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 01:25:07,792 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 01:25:07,792 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:25:07,879 INFO L255 TraceCheckSpWp]: Trace formula consists of 15340 conjuncts, 384 conjuncts are in the unsatisfiable core [2024-11-09 01:25:07,925 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:25:10,295 INFO L134 CoverageAnalysis]: Checked inductivity of 347636 backedges. 0 proven. 347636 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:25:10,296 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:28:27,862 INFO L134 CoverageAnalysis]: Checked inductivity of 347636 backedges. 0 proven. 347636 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:28:27,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426545161] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:28:27,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1566377707] [2024-11-09 01:28:27,865 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2024-11-09 01:28:27,866 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:28:27,866 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:28:27,866 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:28:27,867 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:28:28,982 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:28:36,140 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31688#(and (= ~__tmp_120439_1~0 1) (<= 1 |#StackHeapBarrier|) (= ~__return_120502~0 0) (= ~__return_main~0 0))' at error location [2024-11-09 01:28:36,140 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:28:36,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:28:36,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [384, 384, 384] total 768 [2024-11-09 01:28:36,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835861817] [2024-11-09 01:28:36,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:28:36,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 769 states [2024-11-09 01:28:36,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:28:36,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 769 interpolants. [2024-11-09 01:28:36,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309078, Invalid=318978, Unknown=0, NotChecked=0, Total=628056 [2024-11-09 01:28:36,279 INFO L87 Difference]: Start difference. First operand 1911 states and 1912 transitions. Second operand has 769 states, 769 states have (on average 4.964889466840052) internal successors, (3818), 768 states have internal predecessors, (3818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:30:14,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:30:14,129 INFO L93 Difference]: Finished difference Result 3838 states and 4223 transitions. [2024-11-09 01:30:14,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 768 states. [2024-11-09 01:30:14,132 INFO L78 Accepts]: Start accepts. Automaton has has 769 states, 769 states have (on average 4.964889466840052) internal successors, (3818), 768 states have internal predecessors, (3818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1909 [2024-11-09 01:30:14,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:30:14,146 INFO L225 Difference]: With dead ends: 3838 [2024-11-09 01:30:14,147 INFO L226 Difference]: Without dead ends: 3831 [2024-11-09 01:30:14,192 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6109 GetRequests, 5318 SyntacticMatches, 0 SemanticMatches, 791 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36160 ImplicationChecksByTransitivity, 263.2s TimeCoverageRelationStatistics Valid=309078, Invalid=318978, Unknown=0, NotChecked=0, Total=628056 [2024-11-09 01:30:14,193 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 89 mSDsluCounter, 2348 mSDsCounter, 0 mSdLazyCounter, 1577 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 2377 SdHoareTripleChecker+Invalid, 1599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-09 01:30:14,193 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 2377 Invalid, 1599 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [22 Valid, 1577 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-11-09 01:30:14,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3831 states. [2024-11-09 01:30:14,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3831 to 3831. [2024-11-09 01:30:14,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3831 states, 3830 states have (on average 1.0005221932114883) internal successors, (3832), 3830 states have internal predecessors, (3832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:30:14,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3831 states to 3831 states and 3832 transitions. [2024-11-09 01:30:14,258 INFO L78 Accepts]: Start accepts. Automaton has 3831 states and 3832 transitions. Word has length 1909 [2024-11-09 01:30:14,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:30:14,261 INFO L471 AbstractCegarLoop]: Abstraction has 3831 states and 3832 transitions. [2024-11-09 01:30:14,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 769 states, 769 states have (on average 4.964889466840052) internal successors, (3818), 768 states have internal predecessors, (3818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:30:14,264 INFO L276 IsEmpty]: Start isEmpty. Operand 3831 states and 3832 transitions. [2024-11-09 01:30:14,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3830 [2024-11-09 01:30:14,367 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:30:14,368 INFO L215 NwaCegarLoop]: trace histogram [758, 757, 757, 757, 757, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:30:14,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 01:30:14,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:30:14,569 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:30:14,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:30:14,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1095486530, now seen corresponding path program 7 times [2024-11-09 01:30:14,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:30:14,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445508217] [2024-11-09 01:30:14,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:30:14,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:30:19,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat