./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound2.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_2c02421f-8c24-44e0-8ac6-3313a8f5b323/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c02421f-8c24-44e0-8ac6-3313a8f5b323/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_2c02421f-8c24-44e0-8ac6-3313a8f5b323/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c02421f-8c24-44e0-8ac6-3313a8f5b323/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c02421f-8c24-44e0-8ac6-3313a8f5b323/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_2c02421f-8c24-44e0-8ac6-3313a8f5b323/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 2e2cde485588a76ffd9007a3156c09bf9b7ea2f13bf08ca050cf52c24b8b1e9f --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 01:08:16,766 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 01:08:16,855 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c02421f-8c24-44e0-8ac6-3313a8f5b323/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 01:08:16,864 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 01:08:16,867 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 01:08:16,920 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 01:08:16,923 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 01:08:16,923 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 01:08:16,924 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 01:08:16,926 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 01:08:16,926 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 01:08:16,927 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 01:08:16,927 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 01:08:16,927 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 01:08:16,930 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 01:08:16,930 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 01:08:16,930 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 01:08:16,931 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 01:08:16,931 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 01:08:16,931 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 01:08:16,932 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 01:08:16,932 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 01:08:16,933 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 01:08:16,933 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 01:08:16,933 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 01:08:16,934 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 01:08:16,934 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 01:08:16,934 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 01:08:16,935 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 01:08:16,935 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 01:08:16,935 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 01:08:16,939 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 01:08:16,940 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 01:08:16,940 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 01:08:16,940 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 01:08:16,941 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 01:08:16,941 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 01:08:16,941 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 01:08:16,941 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 01:08:16,954 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 01:08:16,954 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 01:08:16,955 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 01:08:16,955 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 01:08:16,955 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 01:08:16,955 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 01:08:16,955 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 01:08:16,956 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 01:08:16,956 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_2c02421f-8c24-44e0-8ac6-3313a8f5b323/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c02421f-8c24-44e0-8ac6-3313a8f5b323/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e2cde485588a76ffd9007a3156c09bf9b7ea2f13bf08ca050cf52c24b8b1e9f [2024-11-09 01:08:17,290 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 01:08:17,316 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 01:08:17,319 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 01:08:17,322 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 01:08:17,323 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 01:08:17,324 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c02421f-8c24-44e0-8ac6-3313a8f5b323/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound2.c Unable to find full path for "g++" [2024-11-09 01:08:19,256 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 01:08:19,439 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 01:08:19,439 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c02421f-8c24-44e0-8ac6-3313a8f5b323/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound2.c [2024-11-09 01:08:19,446 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c02421f-8c24-44e0-8ac6-3313a8f5b323/bin/utaipan-verify-YMUCfTKeje/data/c7e3a6b33/28d7ce870e2344f6b5f3c986278f07e7/FLAGf438c1e6f [2024-11-09 01:08:19,829 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c02421f-8c24-44e0-8ac6-3313a8f5b323/bin/utaipan-verify-YMUCfTKeje/data/c7e3a6b33/28d7ce870e2344f6b5f3c986278f07e7 [2024-11-09 01:08:19,832 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 01:08:19,834 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 01:08:19,836 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 01:08:19,836 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 01:08:19,841 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 01:08:19,842 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:08:19" (1/1) ... [2024-11-09 01:08:19,843 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f52f97b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:08:19, skipping insertion in model container [2024-11-09 01:08:19,843 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:08:19" (1/1) ... [2024-11-09 01:08:19,878 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 01:08:20,091 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_2c02421f-8c24-44e0-8ac6-3313a8f5b323/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound2.c[524,537] [2024-11-09 01:08:20,119 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 01:08:20,133 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 01:08:20,144 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_2c02421f-8c24-44e0-8ac6-3313a8f5b323/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound2.c[524,537] [2024-11-09 01:08:20,152 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 01:08:20,171 INFO L204 MainTranslator]: Completed translation [2024-11-09 01:08:20,172 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:08:20 WrapperNode [2024-11-09 01:08:20,172 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 01:08:20,173 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 01:08:20,174 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 01:08:20,174 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 01:08:20,182 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:08:20" (1/1) ... [2024-11-09 01:08:20,188 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:08:20" (1/1) ... [2024-11-09 01:08:20,203 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 46 [2024-11-09 01:08:20,204 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 01:08:20,205 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 01:08:20,205 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 01:08:20,205 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 01:08:20,212 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:08:20" (1/1) ... [2024-11-09 01:08:20,213 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:08:20" (1/1) ... [2024-11-09 01:08:20,214 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:08:20" (1/1) ... [2024-11-09 01:08:20,214 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:08:20" (1/1) ... [2024-11-09 01:08:20,218 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:08:20" (1/1) ... [2024-11-09 01:08:20,221 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:08:20" (1/1) ... [2024-11-09 01:08:20,222 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:08:20" (1/1) ... [2024-11-09 01:08:20,223 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:08:20" (1/1) ... [2024-11-09 01:08:20,225 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 01:08:20,226 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 01:08:20,226 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 01:08:20,227 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 01:08:20,228 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:08:20" (1/1) ... [2024-11-09 01:08:20,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 01:08:20,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c02421f-8c24-44e0-8ac6-3313a8f5b323/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:08:20,264 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c02421f-8c24-44e0-8ac6-3313a8f5b323/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 01:08:20,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c02421f-8c24-44e0-8ac6-3313a8f5b323/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 01:08:20,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 01:08:20,303 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-09 01:08:20,304 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-09 01:08:20,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 01:08:20,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 01:08:20,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 01:08:20,306 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-09 01:08:20,306 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-09 01:08:20,391 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 01:08:20,394 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 01:08:20,605 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-11-09 01:08:20,606 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 01:08:20,652 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 01:08:20,652 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-09 01:08:20,653 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:08:20 BoogieIcfgContainer [2024-11-09 01:08:20,653 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 01:08:20,655 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 01:08:20,655 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 01:08:20,659 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 01:08:20,659 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 01:08:19" (1/3) ... [2024-11-09 01:08:20,660 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@628e544 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:08:20, skipping insertion in model container [2024-11-09 01:08:20,660 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:08:20" (2/3) ... [2024-11-09 01:08:20,660 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@628e544 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:08:20, skipping insertion in model container [2024-11-09 01:08:20,661 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:08:20" (3/3) ... [2024-11-09 01:08:20,662 INFO L112 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound2.c [2024-11-09 01:08:20,682 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 01:08:20,682 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 01:08:20,741 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 01:08:20,747 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;@8efaa0c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 01:08:20,748 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 01:08:20,751 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 01:08:20,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 01:08:20,760 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:08:20,760 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:08:20,761 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:08:20,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:08:20,767 INFO L85 PathProgramCache]: Analyzing trace with hash 287051146, now seen corresponding path program 1 times [2024-11-09 01:08:20,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:08:20,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15207410] [2024-11-09 01:08:20,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:08:20,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:08:20,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:08:20,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 01:08:20,946 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:08:20,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15207410] [2024-11-09 01:08:20,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15207410] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:08:20,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:08:20,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 01:08:20,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640332741] [2024-11-09 01:08:20,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:08:20,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-09 01:08:20,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:08:20,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-09 01:08:20,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 01:08:20,989 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 01:08:21,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:08:21,021 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2024-11-09 01:08:21,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-09 01:08:21,026 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2024-11-09 01:08:21,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:08:21,034 INFO L225 Difference]: With dead ends: 32 [2024-11-09 01:08:21,035 INFO L226 Difference]: Without dead ends: 17 [2024-11-09 01:08:21,038 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 01:08:21,044 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 01:08:21,046 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 01:08:21,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-09 01:08:21,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-11-09 01:08:21,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 01:08:21,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2024-11-09 01:08:21,086 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 13 [2024-11-09 01:08:21,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:08:21,088 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2024-11-09 01:08:21,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 01:08:21,090 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2024-11-09 01:08:21,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-09 01:08:21,093 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:08:21,093 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:08:21,093 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 01:08:21,094 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:08:21,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:08:21,095 INFO L85 PathProgramCache]: Analyzing trace with hash -279128393, now seen corresponding path program 1 times [2024-11-09 01:08:21,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:08:21,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069732524] [2024-11-09 01:08:21,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:08:21,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:08:21,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:08:21,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 01:08:21,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:08:21,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069732524] [2024-11-09 01:08:21,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069732524] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:08:21,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:08:21,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 01:08:21,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417408900] [2024-11-09 01:08:21,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:08:21,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 01:08:21,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:08:21,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 01:08:21,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 01:08:21,332 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 01:08:21,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:08:21,393 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2024-11-09 01:08:21,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 01:08:21,397 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2024-11-09 01:08:21,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:08:21,398 INFO L225 Difference]: With dead ends: 26 [2024-11-09 01:08:21,398 INFO L226 Difference]: Without dead ends: 19 [2024-11-09 01:08:21,399 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 01:08:21,400 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 01:08:21,403 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 39 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 01:08:21,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-11-09 01:08:21,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-11-09 01:08:21,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 01:08:21,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2024-11-09 01:08:21,416 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 14 [2024-11-09 01:08:21,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:08:21,416 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2024-11-09 01:08:21,416 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 01:08:21,417 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2024-11-09 01:08:21,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-09 01:08:21,417 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:08:21,418 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:08:21,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 01:08:21,418 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:08:21,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:08:21,419 INFO L85 PathProgramCache]: Analyzing trace with hash -277340933, now seen corresponding path program 1 times [2024-11-09 01:08:21,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:08:21,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695069378] [2024-11-09 01:08:21,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:08:21,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:08:21,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 01:08:21,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1567088848] [2024-11-09 01:08:21,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:08:21,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:08:21,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c02421f-8c24-44e0-8ac6-3313a8f5b323/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:08:21,458 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c02421f-8c24-44e0-8ac6-3313a8f5b323/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:08:21,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c02421f-8c24-44e0-8ac6-3313a8f5b323/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 01:08:21,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:08:21,580 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 01:08:21,589 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:08:21,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 01:08:21,888 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:08:21,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:08:21,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695069378] [2024-11-09 01:08:21,889 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 01:08:21,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567088848] [2024-11-09 01:08:21,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567088848] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:08:21,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:08:21,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 01:08:21,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580235855] [2024-11-09 01:08:21,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:08:21,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 01:08:21,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:08:21,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 01:08:21,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 01:08:21,896 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 01:08:23,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 01:08:23,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:08:23,877 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2024-11-09 01:08:23,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 01:08:23,878 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2024-11-09 01:08:23,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:08:23,879 INFO L225 Difference]: With dead ends: 27 [2024-11-09 01:08:23,879 INFO L226 Difference]: Without dead ends: 25 [2024-11-09 01:08:23,880 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:08:23,881 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 3 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-09 01:08:23,882 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 50 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-09 01:08:23,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-09 01:08:23,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2024-11-09 01:08:23,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 01:08:23,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-11-09 01:08:23,891 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2024-11-09 01:08:23,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:08:23,891 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-11-09 01:08:23,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 01:08:23,892 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-11-09 01:08:23,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-09 01:08:23,892 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:08:23,893 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:08:23,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c02421f-8c24-44e0-8ac6-3313a8f5b323/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 01:08:24,097 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c02421f-8c24-44e0-8ac6-3313a8f5b323/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:08:24,097 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:08:24,098 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:08:24,098 INFO L85 PathProgramCache]: Analyzing trace with hash -144982397, now seen corresponding path program 1 times [2024-11-09 01:08:24,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:08:24,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502990370] [2024-11-09 01:08:24,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:08:24,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:08:24,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:08:24,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 01:08:24,413 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:08:24,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502990370] [2024-11-09 01:08:24,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502990370] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:08:24,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858466843] [2024-11-09 01:08:24,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:08:24,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:08:24,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c02421f-8c24-44e0-8ac6-3313a8f5b323/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:08:24,418 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c02421f-8c24-44e0-8ac6-3313a8f5b323/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:08:24,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c02421f-8c24-44e0-8ac6-3313a8f5b323/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 01:08:24,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:08:24,479 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 01:08:24,481 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:08:24,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 01:08:24,548 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:08:24,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 01:08:24,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858466843] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:08:24,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [205444888] [2024-11-09 01:08:24,719 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 01:08:24,719 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:08:24,733 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:08:24,746 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:08:24,746 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:08:25,706 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 103 for LOIs [2024-11-09 01:08:29,967 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 92 for LOIs [2024-11-09 01:08:30,015 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:09:10,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [205444888] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:09:10,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:09:10,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [7, 8, 8] total 24 [2024-11-09 01:09:10,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753788209] [2024-11-09 01:09:10,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:09:10,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 01:09:10,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:10,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 01:09:10,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=463, Unknown=7, NotChecked=0, Total=552 [2024-11-09 01:09:10,635 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 01:09:12,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-09 01:09:15,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-09 01:09:17,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-09 01:09:20,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-09 01:09:21,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-09 01:09:23,029 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-09 01:09:25,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-09 01:09:25,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:25,357 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2024-11-09 01:09:25,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 01:09:25,357 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 20 [2024-11-09 01:09:25,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:25,358 INFO L225 Difference]: With dead ends: 32 [2024-11-09 01:09:25,358 INFO L226 Difference]: Without dead ends: 25 [2024-11-09 01:09:25,359 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 42.0s TimeCoverageRelationStatistics Valid=94, Invalid=499, Unknown=7, NotChecked=0, Total=600 [2024-11-09 01:09:25,362 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 1 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 5 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.4s IncrementalHoareTripleChecker+Time [2024-11-09 01:09:25,363 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 134 Invalid, 5 Unknown, 0 Unchecked, 13.4s Time] [2024-11-09 01:09:25,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-09 01:09:25,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-09 01:09:25,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 01:09:25,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2024-11-09 01:09:25,373 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 20 [2024-11-09 01:09:25,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:25,374 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2024-11-09 01:09:25,374 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 01:09:25,374 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2024-11-09 01:09:25,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-09 01:09:25,375 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:25,375 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:09:25,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c02421f-8c24-44e0-8ac6-3313a8f5b323/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 01:09:25,575 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c02421f-8c24-44e0-8ac6-3313a8f5b323/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:09:25,576 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:09:25,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:25,576 INFO L85 PathProgramCache]: Analyzing trace with hash 568038870, now seen corresponding path program 1 times [2024-11-09 01:09:25,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:25,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010025145] [2024-11-09 01:09:25,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:25,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:25,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:25,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 01:09:25,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:25,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010025145] [2024-11-09 01:09:25,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010025145] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:09:25,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378215717] [2024-11-09 01:09:25,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:25,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:09:25,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c02421f-8c24-44e0-8ac6-3313a8f5b323/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:09:25,737 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c02421f-8c24-44e0-8ac6-3313a8f5b323/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:09:25,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c02421f-8c24-44e0-8ac6-3313a8f5b323/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 01:09:25,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:25,788 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 01:09:25,789 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:09:25,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 01:09:25,891 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:09:26,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 01:09:26,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378215717] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:09:26,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1149705044] [2024-11-09 01:09:26,011 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 01:09:26,012 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:09:26,012 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:09:26,012 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:09:26,013 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:09:28,034 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 147 for LOIs [2024-11-09 01:09:28,704 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 92 for LOIs [2024-11-09 01:09:28,733 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:10:01,432 WARN L286 SmtUtils]: Spent 29.39s on a formula simplification. DAG size of input: 160 DAG size of output: 131 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:10:45,848 WARN L286 SmtUtils]: Spent 44.27s on a formula simplification. DAG size of input: 163 DAG size of output: 134 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:11:02,490 WARN L286 SmtUtils]: Spent 14.36s on a formula simplification. DAG size of input: 103 DAG size of output: 87 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:11:40,082 WARN L286 SmtUtils]: Spent 31.24s on a formula simplification. DAG size of input: 147 DAG size of output: 113 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:12:32,793 WARN L286 SmtUtils]: Spent 52.49s on a formula simplification. DAG size of input: 149 DAG size of output: 118 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:12:43,552 WARN L286 SmtUtils]: Spent 10.57s on a formula simplification. DAG size of input: 140 DAG size of output: 108 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:13:00,225 WARN L286 SmtUtils]: Spent 13.38s on a formula simplification. DAG size of input: 116 DAG size of output: 88 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:13:00,396 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '653#(and (<= 1 |#StackHeapBarrier|) (<= ~counter~0 3) (exists ((|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_24| Int) (|v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_14| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_14| Int)) (and (not (= (+ (* |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_24| 4) (* 2 |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_14|) (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_14| |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_14|)) (+ (* |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_14| |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_14|) (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_14| 2)))) (<= |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_24| 2147483647) (<= 0 |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_24|))) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 01:13:00,396 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:13:00,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:13:00,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 5] total 7 [2024-11-09 01:13:00,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187553843] [2024-11-09 01:13:00,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:13:00,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 01:13:00,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:13:00,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 01:13:00,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=345, Unknown=5, NotChecked=0, Total=420 [2024-11-09 01:13:00,398 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-09 01:13:00,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:13:00,526 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2024-11-09 01:13:00,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 01:13:00,527 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 22 [2024-11-09 01:13:00,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:13:00,528 INFO L225 Difference]: With dead ends: 34 [2024-11-09 01:13:00,528 INFO L226 Difference]: Without dead ends: 27 [2024-11-09 01:13:00,528 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 211.8s TimeCoverageRelationStatistics Valid=70, Invalid=345, Unknown=5, NotChecked=0, Total=420 [2024-11-09 01:13:00,529 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:13:00,530 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 55 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:13:00,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-09 01:13:00,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-09 01:13:00,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 01:13:00,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2024-11-09 01:13:00,538 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 22 [2024-11-09 01:13:00,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:13:00,539 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2024-11-09 01:13:00,539 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-09 01:13:00,539 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2024-11-09 01:13:00,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-09 01:13:00,540 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:13:00,540 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:13:00,564 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c02421f-8c24-44e0-8ac6-3313a8f5b323/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 01:13:00,740 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c02421f-8c24-44e0-8ac6-3313a8f5b323/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:13:00,741 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:13:00,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:13:00,742 INFO L85 PathProgramCache]: Analyzing trace with hash 569826330, now seen corresponding path program 1 times [2024-11-09 01:13:00,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:13:00,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143319243] [2024-11-09 01:13:00,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:13:00,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:13:00,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 01:13:00,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [634981507] [2024-11-09 01:13:00,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:13:00,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:13:00,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c02421f-8c24-44e0-8ac6-3313a8f5b323/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:13:00,764 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c02421f-8c24-44e0-8ac6-3313a8f5b323/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:13:00,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c02421f-8c24-44e0-8ac6-3313a8f5b323/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 01:13:00,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:13:00,835 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 01:13:00,837 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:13:08,974 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 01:13:08,975 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:13:15,790 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 01:13:15,790 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:13:15,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143319243] [2024-11-09 01:13:15,791 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 01:13:15,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634981507] [2024-11-09 01:13:15,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634981507] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:13:15,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [519657218] [2024-11-09 01:13:15,793 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-09 01:13:15,793 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:13:15,794 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:13:15,794 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:13:15,794 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:13:17,236 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 121 for LOIs [2024-11-09 01:13:25,847 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 96 for LOIs [2024-11-09 01:13:25,867 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:13:27,872 WARN L851 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_22| Int) (|v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_25| Int) (|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_41| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_25| Int)) (and (<= |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_41| 2147483647) (not (= (+ (* |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_22| 4) (* 2 |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_25|) (* |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_41| 4) (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_25| |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_25|)) (+ (* |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_25| |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_25|) (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_25| 2)))) (<= 0 |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_41|) (let ((.cse16 (select |c_#memory_int| 1))) (let ((.cse0 (= (select |c_#valid| 0) 0)) (.cse1 (= (select |c_#valid| 3) 1)) (.cse3 (= 2 (select |c_#length| 1))) (.cse5 (= |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_25| 1)) (.cse7 (+ |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_41| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_22|)) (.cse4 (= (select |c_#valid| 1) 1)) (.cse8 (= (select |c_#valid| 2) 1)) (.cse9 (= (select .cse16 1) 0)) (.cse10 (= (select |c_#length| 3) 12)) (.cse11 (= 48 (select .cse16 0))) (.cse12 (= (select |c_#length| 2) 13)) (.cse13 (= (mod |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_41| 2) 1))) (or (let ((.cse2 (div (+ (- 1) |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_25|) 2))) (let ((.cse6 (* .cse2 .cse2))) (and .cse0 (= (mod (+ |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_25| 1) 2) 0) .cse1 (<= .cse2 2147483647) (<= 0 (+ .cse2 2147483648)) (= c_~counter~0 1) .cse3 .cse4 .cse5 (<= (+ .cse6 3) (+ |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_41| |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_25|)) (= .cse6 .cse7) .cse8 .cse9 .cse10 .cse11 .cse12 .cse13))) (and .cse0 .cse1 .cse3 (exists ((|v_ULTIMATE.start_main_~u~0#1_32| Int)) (let ((.cse15 (div (+ (- 1) |v_ULTIMATE.start_main_~u~0#1_32|) 2))) (let ((.cse14 (* .cse15 .cse15))) (and (= (+ (* |v_ULTIMATE.start_main_~u~0#1_32| |v_ULTIMATE.start_main_~u~0#1_32|) 1) (+ (* .cse14 4) (* 2 |v_ULTIMATE.start_main_~u~0#1_32|))) (<= 0 (+ .cse15 2147483648)) (<= .cse15 2147483647) (not (= |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_41| .cse14)) (<= (+ 3 .cse14) (+ |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_41| |v_ULTIMATE.start_main_~u~0#1_32|)) (or (and (= (+ 2 |v_ULTIMATE.start_main_~u~0#1_32|) |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_25|) (<= .cse14 |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_41|) .cse5 (= (+ .cse14 |v_ULTIMATE.start_main_~u~0#1_32|) .cse7)) (and (<= (+ |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_41| 1) .cse14) (= |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_25| |v_ULTIMATE.start_main_~u~0#1_32|) (= |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_25| 3) (= (+ |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_41| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_22| 1) .cse14))) (= (mod (+ |v_ULTIMATE.start_main_~u~0#1_32| 1) 2) 0))))) .cse4 .cse8 .cse9 .cse10 .cse11 (= 2 c_~counter~0) .cse12 .cse13)))))) (<= 1 |c_#StackHeapBarrier|) (= |c___VERIFIER_assert_#in~cond| 0) (<= 1 c_~counter~0)) is different from false [2024-11-09 01:14:19,828 WARN L286 SmtUtils]: Spent 48.21s on a formula simplification. DAG size of input: 160 DAG size of output: 131 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:14:54,054 WARN L286 SmtUtils]: Spent 30.42s on a formula simplification. DAG size of input: 163 DAG size of output: 57 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:15:51,290 WARN L286 SmtUtils]: Spent 35.46s on a formula simplification. DAG size of input: 121 DAG size of output: 89 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:15:53,303 WARN L851 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_22| Int) (|v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_25| Int) (|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_41| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_25| Int)) (and (let ((.cse0 (= (+ (* |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_22| 4) (* 2 |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_25|) (* |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_41| 4) (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_25| |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_25|)) (+ (* |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_25| |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_25|) (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_25| 2))))) (or (and (not .cse0) (= |c___VERIFIER_assert_#in~cond| 0)) (and .cse0 (= |c___VERIFIER_assert_#in~cond| 1)))) (<= |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_41| 2147483647) (<= 0 |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_41|) (let ((.cse17 (select |c_#memory_int| 1))) (let ((.cse1 (= (select |c_#valid| 0) 0)) (.cse2 (= (select |c_#valid| 3) 1)) (.cse4 (= 2 (select |c_#length| 1))) (.cse6 (= |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_25| 1)) (.cse8 (+ |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_41| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_22|)) (.cse5 (= (select |c_#valid| 1) 1)) (.cse9 (= (select |c_#valid| 2) 1)) (.cse10 (= (select .cse17 1) 0)) (.cse11 (= (select |c_#length| 3) 12)) (.cse12 (= 48 (select .cse17 0))) (.cse13 (= (select |c_#length| 2) 13)) (.cse14 (= (mod |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_41| 2) 1))) (or (let ((.cse3 (div (+ (- 1) |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_25|) 2))) (let ((.cse7 (* .cse3 .cse3))) (and .cse1 (= (mod (+ |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_25| 1) 2) 0) .cse2 (<= .cse3 2147483647) (<= 0 (+ .cse3 2147483648)) (= c_~counter~0 1) .cse4 .cse5 .cse6 (<= (+ .cse7 3) (+ |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_41| |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_25|)) (= .cse7 .cse8) .cse9 .cse10 .cse11 .cse12 .cse13 .cse14))) (and .cse1 .cse2 .cse4 (exists ((|v_ULTIMATE.start_main_~u~0#1_32| Int)) (let ((.cse16 (div (+ (- 1) |v_ULTIMATE.start_main_~u~0#1_32|) 2))) (let ((.cse15 (* .cse16 .cse16))) (and (= (+ (* |v_ULTIMATE.start_main_~u~0#1_32| |v_ULTIMATE.start_main_~u~0#1_32|) 1) (+ (* .cse15 4) (* 2 |v_ULTIMATE.start_main_~u~0#1_32|))) (<= 0 (+ .cse16 2147483648)) (<= .cse16 2147483647) (not (= |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_41| .cse15)) (<= (+ 3 .cse15) (+ |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_41| |v_ULTIMATE.start_main_~u~0#1_32|)) (or (and (= (+ 2 |v_ULTIMATE.start_main_~u~0#1_32|) |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_25|) (<= .cse15 |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_41|) .cse6 (= (+ .cse15 |v_ULTIMATE.start_main_~u~0#1_32|) .cse8)) (and (<= (+ |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_41| 1) .cse15) (= |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_25| |v_ULTIMATE.start_main_~u~0#1_32|) (= |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_25| 3) (= (+ |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_41| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_22| 1) .cse15))) (= (mod (+ |v_ULTIMATE.start_main_~u~0#1_32| 1) 2) 0))))) .cse5 .cse9 .cse10 .cse11 .cse12 (= 2 c_~counter~0) .cse13 .cse14)))))) (= |c___VERIFIER_assert_#in~cond| c___VERIFIER_assert_~cond) (<= 1 |c_#StackHeapBarrier|) (<= 1 c_~counter~0)) is different from false [2024-11-09 01:16:06,824 WARN L286 SmtUtils]: Spent 10.84s on a formula simplification. DAG size of input: 116 DAG size of output: 92 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:16:27,656 WARN L286 SmtUtils]: Spent 11.29s on a formula simplification. DAG size of input: 116 DAG size of output: 90 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:16:27,659 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '895#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_22| Int) (|v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_25| Int) (|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_41| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_25| Int)) (and (<= |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_41| 2147483647) (not (= (+ (* |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_22| 4) (* 2 |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_25|) (* |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_41| 4) (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_25| |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_25|)) (+ (* |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_25| |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_25|) (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_25| 2)))) (<= 0 |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_41|) (or (and (= (select |#length| 3) 12) (= (mod (+ |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_25| 1) 2) 0) (<= (div (+ (- 1) |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_25|) 2) 2147483647) (<= 0 (+ (div (+ (- 1) |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_25|) 2) 2147483648)) (= 13 (select |#length| 2)) (= |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_25| 1) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (<= (+ (* (div (+ (- 1) |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_25|) 2) (div (+ (- 1) |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_25|) 2)) 3) (+ |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_41| |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_25|)) (= (* (div (+ (- 1) |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_25|) 2) (div (+ (- 1) |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_25|) 2)) (+ |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_41| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_22|)) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= (select (select |#memory_int| 1) 0) 48) (= ~counter~0 1) (= (select (select |#memory_int| 1) 1) 0) (= (mod |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_41| 2) 1)) (and (= (select |#length| 3) 12) (= 13 (select |#length| 2)) (exists ((|v_ULTIMATE.start_main_~u~0#1_32| Int)) (and (= (+ (* |v_ULTIMATE.start_main_~u~0#1_32| |v_ULTIMATE.start_main_~u~0#1_32|) 1) (+ (* (* (div (+ (- 1) |v_ULTIMATE.start_main_~u~0#1_32|) 2) (div (+ (- 1) |v_ULTIMATE.start_main_~u~0#1_32|) 2)) 4) (* 2 |v_ULTIMATE.start_main_~u~0#1_32|))) (<= 0 (+ (div (+ (- 1) |v_ULTIMATE.start_main_~u~0#1_32|) 2) 2147483648)) (<= (div (+ (- 1) |v_ULTIMATE.start_main_~u~0#1_32|) 2) 2147483647) (not (= |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_41| (* (div (+ (- 1) |v_ULTIMATE.start_main_~u~0#1_32|) 2) (div (+ (- 1) |v_ULTIMATE.start_main_~u~0#1_32|) 2)))) (<= (+ 3 (* (div (+ (- 1) |v_ULTIMATE.start_main_~u~0#1_32|) 2) (div (+ (- 1) |v_ULTIMATE.start_main_~u~0#1_32|) 2))) (+ |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_41| |v_ULTIMATE.start_main_~u~0#1_32|)) (or (and (= (+ 2 |v_ULTIMATE.start_main_~u~0#1_32|) |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_25|) (<= (* (div (+ (- 1) |v_ULTIMATE.start_main_~u~0#1_32|) 2) (div (+ (- 1) |v_ULTIMATE.start_main_~u~0#1_32|) 2)) |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_41|) (= |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_25| 1) (= (+ (* (div (+ (- 1) |v_ULTIMATE.start_main_~u~0#1_32|) 2) (div (+ (- 1) |v_ULTIMATE.start_main_~u~0#1_32|) 2)) |v_ULTIMATE.start_main_~u~0#1_32|) (+ |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_41| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_22|))) (and (<= (+ |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_41| 1) (* (div (+ (- 1) |v_ULTIMATE.start_main_~u~0#1_32|) 2) (div (+ (- 1) |v_ULTIMATE.start_main_~u~0#1_32|) 2))) (= |v_ULTIMATE.start_main_~u~0#1_BEFORE_CALL_25| |v_ULTIMATE.start_main_~u~0#1_32|) (= |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_25| 3) (= (+ |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_41| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_22| 1) (* (div (+ (- 1) |v_ULTIMATE.start_main_~u~0#1_32|) 2) (div (+ (- 1) |v_ULTIMATE.start_main_~u~0#1_32|) 2))))) (= (mod (+ |v_ULTIMATE.start_main_~u~0#1_32| 1) 2) 0))) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (= (mod |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_41| 2) 1) (= ~counter~0 2))))) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 01:16:27,659 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:16:27,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 01:16:27,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2024-11-09 01:16:27,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620785407] [2024-11-09 01:16:27,659 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 01:16:27,660 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 01:16:27,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:16:27,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 01:16:27,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=348, Unknown=14, NotChecked=78, Total=506 [2024-11-09 01:16:27,661 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 01:16:29,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 01:16:32,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 01:16:33,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:16:33,864 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2024-11-09 01:16:33,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 01:16:33,865 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 22 [2024-11-09 01:16:33,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:16:33,866 INFO L225 Difference]: With dead ends: 36 [2024-11-09 01:16:33,866 INFO L226 Difference]: Without dead ends: 32 [2024-11-09 01:16:33,867 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 190.9s TimeCoverageRelationStatistics Valid=73, Invalid=383, Unknown=14, NotChecked=82, Total=552 [2024-11-09 01:16:33,868 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 4 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:16:33,868 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 92 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2024-11-09 01:16:33,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-09 01:16:33,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2024-11-09 01:16:33,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 01:16:33,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2024-11-09 01:16:33,883 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2024-11-09 01:16:33,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:16:33,883 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2024-11-09 01:16:33,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 01:16:33,884 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2024-11-09 01:16:33,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-09 01:16:33,885 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:16:33,885 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:16:33,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c02421f-8c24-44e0-8ac6-3313a8f5b323/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 01:16:34,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c02421f-8c24-44e0-8ac6-3313a8f5b323/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:16:34,090 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:16:34,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:16:34,091 INFO L85 PathProgramCache]: Analyzing trace with hash 24144482, now seen corresponding path program 1 times [2024-11-09 01:16:34,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:16:34,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821778214] [2024-11-09 01:16:34,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:16:34,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:16:34,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:16:34,641 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 01:16:34,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:16:34,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821778214] [2024-11-09 01:16:34,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821778214] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:16:34,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466210949] [2024-11-09 01:16:34,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:16:34,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:16:34,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c02421f-8c24-44e0-8ac6-3313a8f5b323/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:16:34,643 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c02421f-8c24-44e0-8ac6-3313a8f5b323/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:16:34,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c02421f-8c24-44e0-8ac6-3313a8f5b323/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 01:16:34,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:16:34,686 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 01:16:34,688 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:16:34,935 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 01:16:34,935 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:16:35,532 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 01:16:35,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466210949] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:16:35,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [978977461] [2024-11-09 01:16:35,535 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 01:16:35,535 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:16:35,535 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:16:35,536 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:16:35,536 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:16:37,134 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 188 for LOIs [2024-11-09 01:16:40,612 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 92 for LOIs [2024-11-09 01:16:40,641 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:17:26,443 WARN L286 SmtUtils]: Spent 39.00s on a formula simplification. DAG size of input: 163 DAG size of output: 138 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:19:06,466 WARN L286 SmtUtils]: Spent 1.56m on a formula simplification. DAG size of input: 166 DAG size of output: 137 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:19:30,773 WARN L286 SmtUtils]: Spent 15.65s on a formula simplification. DAG size of input: 105 DAG size of output: 89 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:20:53,553 WARN L286 SmtUtils]: Spent 1.32m on a formula simplification. DAG size of input: 188 DAG size of output: 132 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:22:54,445 WARN L286 SmtUtils]: Spent 1.90m on a formula simplification. DAG size of input: 190 DAG size of output: 149 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:23:31,221 WARN L286 SmtUtils]: Spent 29.93s on a formula simplification. DAG size of input: 181 DAG size of output: 131 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)