./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound50.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_4ad53dd2-d852-46b8-817e-bf7a06fc4de8/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ad53dd2-d852-46b8-817e-bf7a06fc4de8/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_4ad53dd2-d852-46b8-817e-bf7a06fc4de8/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ad53dd2-d852-46b8-817e-bf7a06fc4de8/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ad53dd2-d852-46b8-817e-bf7a06fc4de8/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_4ad53dd2-d852-46b8-817e-bf7a06fc4de8/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 733c8c0d341cb54eee4e59b43f30f5bf47e1dd1b655467c56f6a38527ef3ee98 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 06:08:17,701 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 06:08:17,825 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ad53dd2-d852-46b8-817e-bf7a06fc4de8/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 06:08:17,834 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 06:08:17,836 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 06:08:17,886 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 06:08:17,890 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 06:08:17,891 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 06:08:17,892 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 06:08:17,893 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 06:08:17,895 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 06:08:17,895 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 06:08:17,896 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 06:08:17,899 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 06:08:17,900 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 06:08:17,900 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 06:08:17,901 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 06:08:17,901 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 06:08:17,902 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 06:08:17,903 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 06:08:17,906 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 06:08:17,907 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 06:08:17,908 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 06:08:17,909 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 06:08:17,909 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 06:08:17,910 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 06:08:17,910 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 06:08:17,911 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 06:08:17,911 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 06:08:17,912 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 06:08:17,912 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 06:08:17,912 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 06:08:17,913 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 06:08:17,913 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 06:08:17,913 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 06:08:17,914 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 06:08:17,914 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 06:08:17,916 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 06:08:17,916 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:08:17,917 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 06:08:17,917 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 06:08:17,918 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 06:08:17,918 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 06:08:17,918 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 06:08:17,919 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 06:08:17,920 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 06:08:17,920 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 06:08:17,920 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_4ad53dd2-d852-46b8-817e-bf7a06fc4de8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ad53dd2-d852-46b8-817e-bf7a06fc4de8/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 733c8c0d341cb54eee4e59b43f30f5bf47e1dd1b655467c56f6a38527ef3ee98 [2024-11-09 06:08:18,278 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 06:08:18,308 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 06:08:18,312 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 06:08:18,314 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 06:08:18,315 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 06:08:18,317 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ad53dd2-d852-46b8-817e-bf7a06fc4de8/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound50.c Unable to find full path for "g++" [2024-11-09 06:08:20,420 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 06:08:20,618 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 06:08:20,618 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ad53dd2-d852-46b8-817e-bf7a06fc4de8/sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound50.c [2024-11-09 06:08:20,627 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ad53dd2-d852-46b8-817e-bf7a06fc4de8/bin/utaipan-verify-YMUCfTKeje/data/c01c69dc7/85d82addd22e4962a54479b6e93cf430/FLAG27b978bf3 [2024-11-09 06:08:20,643 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ad53dd2-d852-46b8-817e-bf7a06fc4de8/bin/utaipan-verify-YMUCfTKeje/data/c01c69dc7/85d82addd22e4962a54479b6e93cf430 [2024-11-09 06:08:20,647 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 06:08:20,648 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 06:08:20,650 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 06:08:20,650 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 06:08:20,657 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 06:08:20,658 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:08:20" (1/1) ... [2024-11-09 06:08:20,662 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16299b5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:08:20, skipping insertion in model container [2024-11-09 06:08:20,663 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:08:20" (1/1) ... [2024-11-09 06:08:20,688 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 06:08:20,921 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_4ad53dd2-d852-46b8-817e-bf7a06fc4de8/sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound50.c[525,538] [2024-11-09 06:08:20,946 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:08:20,960 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 06:08:20,976 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_4ad53dd2-d852-46b8-817e-bf7a06fc4de8/sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound50.c[525,538] [2024-11-09 06:08:20,985 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:08:21,009 INFO L204 MainTranslator]: Completed translation [2024-11-09 06:08:21,010 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:08:21 WrapperNode [2024-11-09 06:08:21,010 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 06:08:21,011 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 06:08:21,012 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 06:08:21,012 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 06:08:21,020 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:08:21" (1/1) ... [2024-11-09 06:08:21,028 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:08:21" (1/1) ... [2024-11-09 06:08:21,047 INFO L138 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2024-11-09 06:08:21,048 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 06:08:21,049 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 06:08:21,050 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 06:08:21,050 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 06:08:21,061 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:08:21" (1/1) ... [2024-11-09 06:08:21,062 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:08:21" (1/1) ... [2024-11-09 06:08:21,063 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:08:21" (1/1) ... [2024-11-09 06:08:21,064 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:08:21" (1/1) ... [2024-11-09 06:08:21,067 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:08:21" (1/1) ... [2024-11-09 06:08:21,073 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:08:21" (1/1) ... [2024-11-09 06:08:21,078 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:08:21" (1/1) ... [2024-11-09 06:08:21,079 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:08:21" (1/1) ... [2024-11-09 06:08:21,081 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 06:08:21,082 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 06:08:21,082 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 06:08:21,082 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 06:08:21,083 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:08:21" (1/1) ... [2024-11-09 06:08:21,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:08:21,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ad53dd2-d852-46b8-817e-bf7a06fc4de8/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:08:21,121 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ad53dd2-d852-46b8-817e-bf7a06fc4de8/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 06:08:21,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ad53dd2-d852-46b8-817e-bf7a06fc4de8/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 06:08:21,161 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 06:08:21,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 06:08:21,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 06:08:21,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 06:08:21,163 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-09 06:08:21,164 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-09 06:08:21,244 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 06:08:21,247 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 06:08:21,447 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-09 06:08:21,448 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 06:08:21,490 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 06:08:21,491 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-09 06:08:21,491 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:08:21 BoogieIcfgContainer [2024-11-09 06:08:21,492 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 06:08:21,496 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 06:08:21,496 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 06:08:21,500 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 06:08:21,501 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 06:08:20" (1/3) ... [2024-11-09 06:08:21,502 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b03ee0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:08:21, skipping insertion in model container [2024-11-09 06:08:21,503 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:08:21" (2/3) ... [2024-11-09 06:08:21,503 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b03ee0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:08:21, skipping insertion in model container [2024-11-09 06:08:21,504 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:08:21" (3/3) ... [2024-11-09 06:08:21,505 INFO L112 eAbstractionObserver]: Analyzing ICFG geo2-ll_unwindbound50.c [2024-11-09 06:08:21,535 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 06:08:21,537 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 06:08:21,638 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 06:08:21,647 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;@1fed067f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 06:08:21,648 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 06:08:21,653 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 06:08:21,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-09 06:08:21,662 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:08:21,664 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 06:08:21,665 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:08:21,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:08:21,692 INFO L85 PathProgramCache]: Analyzing trace with hash 2080033536, now seen corresponding path program 1 times [2024-11-09 06:08:21,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:08:21,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50984993] [2024-11-09 06:08:21,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:08:21,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:08:21,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:08:21,884 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 06:08:21,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:08:21,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50984993] [2024-11-09 06:08:21,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50984993] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:08:21,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:08:21,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 06:08:21,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277176162] [2024-11-09 06:08:21,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:08:21,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-09 06:08:21,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:08:21,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-09 06:08:21,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 06:08:21,929 INFO L87 Difference]: Start difference. First operand has 14 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:08:21,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:08:21,962 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2024-11-09 06:08:21,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-09 06:08:21,966 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-09 06:08:21,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:08:21,975 INFO L225 Difference]: With dead ends: 27 [2024-11-09 06:08:21,975 INFO L226 Difference]: Without dead ends: 12 [2024-11-09 06:08:21,979 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 06:08:21,985 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:08:21,987 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:08:22,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2024-11-09 06:08:22,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2024-11-09 06:08:22,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 06:08:22,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2024-11-09 06:08:22,025 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 6 [2024-11-09 06:08:22,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:08:22,026 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2024-11-09 06:08:22,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:08:22,027 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2024-11-09 06:08:22,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 06:08:22,028 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:08:22,028 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:08:22,028 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 06:08:22,029 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:08:22,030 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:08:22,031 INFO L85 PathProgramCache]: Analyzing trace with hash -342970048, now seen corresponding path program 1 times [2024-11-09 06:08:22,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:08:22,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272866530] [2024-11-09 06:08:22,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:08:22,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:08:22,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:08:22,193 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 06:08:22,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:08:22,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272866530] [2024-11-09 06:08:22,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272866530] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:08:22,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:08:22,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:08:22,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579090607] [2024-11-09 06:08:22,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:08:22,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 06:08:22,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:08:22,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 06:08:22,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:08:22,199 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:08:22,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:08:22,222 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2024-11-09 06:08:22,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 06:08:22,227 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-09 06:08:22,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:08:22,228 INFO L225 Difference]: With dead ends: 21 [2024-11-09 06:08:22,228 INFO L226 Difference]: Without dead ends: 14 [2024-11-09 06:08:22,229 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:08:22,230 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:08:22,231 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:08:22,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-11-09 06:08:22,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-11-09 06:08:22,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 06:08:22,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2024-11-09 06:08:22,243 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 7 [2024-11-09 06:08:22,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:08:22,243 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2024-11-09 06:08:22,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:08:22,244 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2024-11-09 06:08:22,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 06:08:22,244 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:08:22,244 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:08:22,244 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 06:08:22,245 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:08:22,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:08:22,248 INFO L85 PathProgramCache]: Analyzing trace with hash -341182588, now seen corresponding path program 1 times [2024-11-09 06:08:22,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:08:22,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850602592] [2024-11-09 06:08:22,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:08:22,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:08:22,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:08:22,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [480766781] [2024-11-09 06:08:22,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:08:22,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:08:22,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ad53dd2-d852-46b8-817e-bf7a06fc4de8/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:08:22,276 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ad53dd2-d852-46b8-817e-bf7a06fc4de8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:08:22,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ad53dd2-d852-46b8-817e-bf7a06fc4de8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 06:08:22,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:08:22,341 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 06:08:22,353 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:08:22,457 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 06:08:22,457 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:08:22,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:08:22,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850602592] [2024-11-09 06:08:22,459 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:08:22,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480766781] [2024-11-09 06:08:22,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480766781] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:08:22,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:08:22,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 06:08:22,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999003178] [2024-11-09 06:08:22,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:08:22,461 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 06:08:22,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:08:22,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 06:08:22,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:08:22,462 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:08:22,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:08:22,533 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2024-11-09 06:08:22,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 06:08:22,534 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-09 06:08:22,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:08:22,535 INFO L225 Difference]: With dead ends: 23 [2024-11-09 06:08:22,535 INFO L226 Difference]: Without dead ends: 20 [2024-11-09 06:08:22,536 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:08:22,537 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:08:22,538 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 35 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:08:22,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-09 06:08:22,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-11-09 06:08:22,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 06:08:22,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2024-11-09 06:08:22,545 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 7 [2024-11-09 06:08:22,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:08:22,546 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2024-11-09 06:08:22,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:08:22,546 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2024-11-09 06:08:22,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-09 06:08:22,547 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:08:22,548 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:08:22,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ad53dd2-d852-46b8-817e-bf7a06fc4de8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 06:08:22,752 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ad53dd2-d852-46b8-817e-bf7a06fc4de8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:08:22,752 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:08:22,753 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:08:22,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1364603783, now seen corresponding path program 1 times [2024-11-09 06:08:22,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:08:22,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710828826] [2024-11-09 06:08:22,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:08:22,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:08:22,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:08:22,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:08:22,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:08:22,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710828826] [2024-11-09 06:08:22,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710828826] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:08:22,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799983585] [2024-11-09 06:08:22,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:08:22,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:08:22,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ad53dd2-d852-46b8-817e-bf7a06fc4de8/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:08:22,939 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ad53dd2-d852-46b8-817e-bf7a06fc4de8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:08:22,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ad53dd2-d852-46b8-817e-bf7a06fc4de8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 06:08:23,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:08:23,015 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 06:08:23,016 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:08:23,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:08:23,077 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:08:23,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:08:23,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799983585] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:08:23,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1359189434] [2024-11-09 06:08:23,194 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-09 06:08:23,194 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:08:23,199 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:08:23,206 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:08:23,206 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:08:24,858 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 84 for LOIs [2024-11-09 06:08:25,152 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:09:50,398 WARN L286 SmtUtils]: Spent 1.39m on a formula simplification. DAG size of input: 78 DAG size of output: 73 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 06:10:58,388 WARN L286 SmtUtils]: Spent 1.04m on a formula simplification. DAG size of input: 84 DAG size of output: 79 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 06:12:14,070 WARN L286 SmtUtils]: Spent 1.23m on a formula simplification. DAG size of input: 87 DAG size of output: 82 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 06:12:30,232 WARN L286 SmtUtils]: Spent 13.44s on a formula simplification. DAG size of input: 78 DAG size of output: 70 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 06:12:48,451 WARN L286 SmtUtils]: Spent 12.05s on a formula simplification. DAG size of input: 79 DAG size of output: 71 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 06:12:55,183 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '310#(and (= |__VERIFIER_assert_#in~cond| 0) (or (exists ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_10| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_10| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 0 (+ |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_10| 2147483648)) (<= 1 ~counter~0) (not (= (mod (+ (* |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_11| |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_11|) (* 18446744073709551615 |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_11|) (* |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_11| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11| 18446744073709551615) 1) 18446744073709551616) 0)) (<= 1 |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_10|) (<= |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_10| 2147483647) (<= |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_11| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_11| 2147483648)))) (and (exists ((|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_9| Int)) (and (<= |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_9| 2147483647) (<= 2 |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_9|) (<= (+ (mod (+ 18446744073709551615 |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_9|) 18446744073709551616) 1) (mod |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_9| 18446744073709551616)) (<= 0 (+ |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_9| 2147483648)))) (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~y~0#1_21| Int) (|v_ULTIMATE.start_main_~x~0#1_21| Int) (|v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_10| Int)) (and (not (= (mod (+ |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_10| (* |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_10| |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_10| 18446744073709551615 |v_ULTIMATE.start_main_~y~0#1_21|) (* |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_10| |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_10| |v_ULTIMATE.start_main_~x~0#1_21|) (* |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_10| |v_ULTIMATE.start_main_~x~0#1_21| 18446744073709551615)) 18446744073709551616) 0)) (<= |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_10| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_10| 2147483648)) (= (mod (+ (* |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_10| 18446744073709551615 |v_ULTIMATE.start_main_~y~0#1_21|) (* |v_ULTIMATE.start_main_~x~0#1_21| 18446744073709551615) (* |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_10| |v_ULTIMATE.start_main_~x~0#1_21|) 1) 18446744073709551616) 0))) (<= 51 ~counter~0))))' at error location [2024-11-09 06:12:55,184 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:12:55,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:12:55,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 5] total 10 [2024-11-09 06:12:55,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432549529] [2024-11-09 06:12:55,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:12:55,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 06:12:55,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:12:55,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 06:12:55,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=313, Unknown=7, NotChecked=0, Total=380 [2024-11-09 06:12:55,188 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 06:12:55,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:12:55,318 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2024-11-09 06:12:55,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 06:12:55,319 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 15 [2024-11-09 06:12:55,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:12:55,320 INFO L225 Difference]: With dead ends: 51 [2024-11-09 06:12:55,321 INFO L226 Difference]: Without dead ends: 44 [2024-11-09 06:12:55,321 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 270.1s TimeCoverageRelationStatistics Valid=73, Invalid=382, Unknown=7, NotChecked=0, Total=462 [2024-11-09 06:12:55,323 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:12:55,324 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 66 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:12:55,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-09 06:12:55,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2024-11-09 06:12:55,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.25) internal successors, (35), 31 states have internal predecessors, (35), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 06:12:55,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2024-11-09 06:12:55,334 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 15 [2024-11-09 06:12:55,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:12:55,335 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2024-11-09 06:12:55,335 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 06:12:55,336 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2024-11-09 06:12:55,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-09 06:12:55,336 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:12:55,337 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:12:55,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ad53dd2-d852-46b8-817e-bf7a06fc4de8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 06:12:55,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ad53dd2-d852-46b8-817e-bf7a06fc4de8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:12:55,541 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:12:55,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:12:55,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1366391243, now seen corresponding path program 1 times [2024-11-09 06:12:55,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:12:55,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460490173] [2024-11-09 06:12:55,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:12:55,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:12:55,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:12:55,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [679836334] [2024-11-09 06:12:55,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:12:55,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:12:55,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ad53dd2-d852-46b8-817e-bf7a06fc4de8/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:12:55,577 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ad53dd2-d852-46b8-817e-bf7a06fc4de8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:12:55,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ad53dd2-d852-46b8-817e-bf7a06fc4de8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 06:12:55,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:12:55,645 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 06:12:55,647 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:12:55,719 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:12:55,720 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:12:57,966 WARN L851 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~z~0#1| Int)) (= (mod (+ (* |c_ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 18446744073709551615 |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|) |ULTIMATE.start_main_~z~0#1| (* 18446744073709551615 |c_ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~z~0#1|)) 18446744073709551616) 0)) is different from false [2024-11-09 06:12:58,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:12:58,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460490173] [2024-11-09 06:12:58,459 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 06:12:58,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679836334] [2024-11-09 06:12:58,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679836334] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:12:58,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [260931141] [2024-11-09 06:12:58,462 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 06:12:58,462 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:12:58,463 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:12:58,463 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:12:58,464 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:12:59,537 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 43 for LOIs [2024-11-09 06:12:59,626 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:13:21,552 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '532#(and (exists ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_22| Int) (|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_19| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_22| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_19| Int) (|v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_21| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 0 (+ |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_21| 2147483648)) (<= |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_21| 2147483647) (not (= (mod (+ (* |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_21| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_22| 18446744073709551615) (* |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_21| |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_22|) (* 18446744073709551615 |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_22|) 1) 18446744073709551616) 0)) (<= 1 ~counter~0) (<= 0 (+ |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_19| 2147483648)) (<= 1 |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_19|) (<= |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_19| 2147483647))) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 06:13:21,552 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:13:21,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:13:21,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2024-11-09 06:13:21,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715707226] [2024-11-09 06:13:21,553 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 06:13:21,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 06:13:21,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:13:21,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 06:13:21,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=196, Unknown=7, NotChecked=28, Total=272 [2024-11-09 06:13:21,555 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 06:13:21,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:13:21,656 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2024-11-09 06:13:21,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 06:13:21,657 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-11-09 06:13:21,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:13:21,658 INFO L225 Difference]: With dead ends: 42 [2024-11-09 06:13:21,658 INFO L226 Difference]: Without dead ends: 39 [2024-11-09 06:13:21,659 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=45, Invalid=224, Unknown=7, NotChecked=30, Total=306 [2024-11-09 06:13:21,660 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 4 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:13:21,661 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 53 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:13:21,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-09 06:13:21,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-09 06:13:21,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 30 states have internal predecessors, (33), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 06:13:21,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2024-11-09 06:13:21,670 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 15 [2024-11-09 06:13:21,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:13:21,671 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2024-11-09 06:13:21,671 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 06:13:21,671 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2024-11-09 06:13:21,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-09 06:13:21,672 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:13:21,672 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1] [2024-11-09 06:13:21,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ad53dd2-d852-46b8-817e-bf7a06fc4de8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 06:13:21,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ad53dd2-d852-46b8-817e-bf7a06fc4de8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:13:21,873 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:13:21,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:13:21,874 INFO L85 PathProgramCache]: Analyzing trace with hash -544094958, now seen corresponding path program 2 times [2024-11-09 06:13:21,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:13:21,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81663899] [2024-11-09 06:13:21,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:13:21,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:13:21,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 06:13:21,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1996623499] [2024-11-09 06:13:21,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:13:21,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:13:21,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ad53dd2-d852-46b8-817e-bf7a06fc4de8/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:13:21,920 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ad53dd2-d852-46b8-817e-bf7a06fc4de8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:13:21,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ad53dd2-d852-46b8-817e-bf7a06fc4de8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process