./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E --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 aa34b6970b46b2c3f1bda76d086482188f10831dd44cba913e5171769601c6f3 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 03:03:40,274 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 03:03:40,378 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 03:03:40,384 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 03:03:40,385 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 03:03:40,412 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 03:03:40,413 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 03:03:40,413 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 03:03:40,417 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 03:03:40,417 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 03:03:40,417 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 03:03:40,417 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 03:03:40,417 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 03:03:40,417 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 03:03:40,418 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 03:03:40,418 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 03:03:40,418 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 03:03:40,418 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 03:03:40,418 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 03:03:40,418 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 03:03:40,418 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 03:03:40,418 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 03:03:40,419 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 03:03:40,419 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 03:03:40,419 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 03:03:40,419 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 03:03:40,419 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 03:03:40,419 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 03:03:40,419 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 03:03:40,420 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 03:03:40,420 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 03:03:40,420 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 03:03:40,420 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 03:03:40,420 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 03:03:40,420 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 03:03:40,421 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 03:03:40,421 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 03:03:40,421 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 03:03:40,421 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:03:40,421 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 03:03:40,421 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 03:03:40,421 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 03:03:40,422 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 03:03:40,422 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 03:03:40,422 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 03:03:40,422 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 03:03:40,422 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 03:03:40,422 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E 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 -> aa34b6970b46b2c3f1bda76d086482188f10831dd44cba913e5171769601c6f3 [2024-11-14 03:03:40,858 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 03:03:40,868 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 03:03:40,870 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 03:03:40,872 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 03:03:40,872 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 03:03:40,874 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.c Unable to find full path for "g++" [2024-11-14 03:03:43,039 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 03:03:43,404 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 03:03:43,408 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.c [2024-11-14 03:03:43,421 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/data/b7c8fbcaf/bc05686e84114158b50572e1c0b47742/FLAG33b8a6302 [2024-11-14 03:03:43,453 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/data/b7c8fbcaf/bc05686e84114158b50572e1c0b47742 [2024-11-14 03:03:43,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 03:03:43,460 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 03:03:43,463 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 03:03:43,463 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 03:03:43,470 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 03:03:43,471 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:03:43" (1/1) ... [2024-11-14 03:03:43,474 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a12f03d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:03:43, skipping insertion in model container [2024-11-14 03:03:43,474 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:03:43" (1/1) ... [2024-11-14 03:03:43,500 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 03:03:43,728 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_2f6e4b65-21af-4477-aa78-faf2cf45a271/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.c[490,503] [2024-11-14 03:03:43,758 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:03:43,770 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 03:03:43,786 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_2f6e4b65-21af-4477-aa78-faf2cf45a271/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.c[490,503] [2024-11-14 03:03:43,809 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:03:43,827 INFO L204 MainTranslator]: Completed translation [2024-11-14 03:03:43,828 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:03:43 WrapperNode [2024-11-14 03:03:43,828 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 03:03:43,830 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 03:03:43,830 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 03:03:43,830 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 03:03:43,838 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:03:43" (1/1) ... [2024-11-14 03:03:43,846 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:03:43" (1/1) ... [2024-11-14 03:03:43,867 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 84 [2024-11-14 03:03:43,867 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 03:03:43,868 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 03:03:43,868 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 03:03:43,868 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 03:03:43,877 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:03:43" (1/1) ... [2024-11-14 03:03:43,877 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:03:43" (1/1) ... [2024-11-14 03:03:43,879 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:03:43" (1/1) ... [2024-11-14 03:03:43,882 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:03:43" (1/1) ... [2024-11-14 03:03:43,886 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:03:43" (1/1) ... [2024-11-14 03:03:43,898 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:03:43" (1/1) ... [2024-11-14 03:03:43,899 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:03:43" (1/1) ... [2024-11-14 03:03:43,900 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:03:43" (1/1) ... [2024-11-14 03:03:43,902 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 03:03:43,906 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 03:03:43,906 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 03:03:43,906 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 03:03:43,907 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:03:43" (1/1) ... [2024-11-14 03:03:43,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:03:43,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:03:43,949 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 03:03:43,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 03:03:43,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 03:03:43,994 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-14 03:03:43,994 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-14 03:03:43,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 03:03:43,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 03:03:43,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 03:03:43,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-14 03:03:43,995 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-14 03:03:44,072 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 03:03:44,075 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 03:03:44,375 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-14 03:03:44,375 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 03:03:44,425 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 03:03:44,425 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-14 03:03:44,426 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:03:44 BoogieIcfgContainer [2024-11-14 03:03:44,426 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 03:03:44,432 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 03:03:44,432 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 03:03:44,440 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 03:03:44,440 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 03:03:43" (1/3) ... [2024-11-14 03:03:44,441 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43a7f79f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:03:44, skipping insertion in model container [2024-11-14 03:03:44,441 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:03:43" (2/3) ... [2024-11-14 03:03:44,442 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43a7f79f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:03:44, skipping insertion in model container [2024-11-14 03:03:44,443 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:03:44" (3/3) ... [2024-11-14 03:03:44,444 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound10.c [2024-11-14 03:03:44,467 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 03:03:44,468 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG egcd2-ll_unwindbound10.c that has 3 procedures, 29 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-14 03:03:44,546 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 03:03:44,568 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;@12f080ed, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 03:03:44,569 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 03:03:44,576 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 17 states have internal predecessors, (23), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-14 03:03:44,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-14 03:03:44,585 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:03:44,586 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:03:44,587 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:03:44,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:03:44,595 INFO L85 PathProgramCache]: Analyzing trace with hash -143790805, now seen corresponding path program 1 times [2024-11-14 03:03:44,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:03:44,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525832758] [2024-11-14 03:03:44,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:03:44,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:03:44,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:03:44,795 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 03:03:44,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:03:44,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525832758] [2024-11-14 03:03:44,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525832758] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:03:44,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:03:44,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:03:44,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246401358] [2024-11-14 03:03:44,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:03:44,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-14 03:03:44,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:03:44,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-14 03:03:44,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-14 03:03:44,834 INFO L87 Difference]: Start difference. First operand has 29 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 17 states have internal predecessors, (23), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-14 03:03:44,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:03:44,872 INFO L93 Difference]: Finished difference Result 50 states and 81 transitions. [2024-11-14 03:03:44,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-14 03:03:44,875 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 19 [2024-11-14 03:03:44,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:03:44,883 INFO L225 Difference]: With dead ends: 50 [2024-11-14 03:03:44,887 INFO L226 Difference]: Without dead ends: 27 [2024-11-14 03:03:44,891 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 [2024-11-14 03:03:44,895 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:03:44,896 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 03:03:44,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-14 03:03:44,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-14 03:03:44,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 16 states have internal predecessors, (19), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-14 03:03:44,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 38 transitions. [2024-11-14 03:03:44,943 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 38 transitions. Word has length 19 [2024-11-14 03:03:44,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:03:44,945 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 38 transitions. [2024-11-14 03:03:44,945 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-14 03:03:44,945 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 38 transitions. [2024-11-14 03:03:44,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-14 03:03:44,947 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:03:44,947 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:03:44,947 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 03:03:44,948 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:03:44,948 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:03:44,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1203477869, now seen corresponding path program 1 times [2024-11-14 03:03:44,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:03:44,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484907518] [2024-11-14 03:03:44,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:03:44,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:03:44,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:03:45,224 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 03:03:45,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:03:45,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484907518] [2024-11-14 03:03:45,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484907518] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:03:45,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:03:45,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 03:03:45,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365692033] [2024-11-14 03:03:45,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:03:45,227 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:03:45,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:03:45,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:03:45,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:03:45,228 INFO L87 Difference]: Start difference. First operand 27 states and 38 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-14 03:03:45,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:03:45,280 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2024-11-14 03:03:45,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:03:45,281 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 20 [2024-11-14 03:03:45,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:03:45,282 INFO L225 Difference]: With dead ends: 37 [2024-11-14 03:03:45,282 INFO L226 Difference]: Without dead ends: 29 [2024-11-14 03:03:45,283 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 [2024-11-14 03:03:45,284 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:03:45,285 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 91 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 03:03:45,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-14 03:03:45,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-14 03:03:45,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-14 03:03:45,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2024-11-14 03:03:45,295 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 20 [2024-11-14 03:03:45,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:03:45,295 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2024-11-14 03:03:45,296 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-14 03:03:45,296 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2024-11-14 03:03:45,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-14 03:03:45,296 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:03:45,297 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:03:45,297 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 03:03:45,297 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:03:45,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:03:45,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1341228556, now seen corresponding path program 1 times [2024-11-14 03:03:45,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:03:45,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524257566] [2024-11-14 03:03:45,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:03:45,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:03:45,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:03:45,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 03:03:45,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:03:45,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524257566] [2024-11-14 03:03:45,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524257566] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:03:45,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002773014] [2024-11-14 03:03:45,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:03:45,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:03:45,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:03:45,585 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:03:45,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 03:03:45,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:03:45,669 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 03:03:45,675 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:03:45,746 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 03:03:45,747 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:03:45,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-14 03:03:45,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002773014] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:03:45,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [72961478] [2024-11-14 03:03:45,867 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-14 03:03:45,869 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:03:45,872 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:03:45,879 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:03:45,880 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:03:47,620 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 03:03:47,623 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:03:49,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [72961478] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:03:49,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:03:49,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [5, 5, 5] total 15 [2024-11-14 03:03:49,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929580161] [2024-11-14 03:03:49,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:03:49,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-14 03:03:49,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:03:49,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-14 03:03:49,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-11-14 03:03:49,557 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand has 12 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-14 03:03:50,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:03:50,402 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2024-11-14 03:03:50,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 03:03:50,403 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 21 [2024-11-14 03:03:50,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:03:50,404 INFO L225 Difference]: With dead ends: 39 [2024-11-14 03:03:50,404 INFO L226 Difference]: Without dead ends: 31 [2024-11-14 03:03:50,405 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-11-14 03:03:50,406 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 03:03:50,406 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 153 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 03:03:50,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-14 03:03:50,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2024-11-14 03:03:50,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-14 03:03:50,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2024-11-14 03:03:50,417 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 21 [2024-11-14 03:03:50,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:03:50,417 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2024-11-14 03:03:50,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-14 03:03:50,417 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2024-11-14 03:03:50,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-14 03:03:50,418 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:03:50,418 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:03:50,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 03:03:50,623 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:03:50,623 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:03:50,623 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:03:50,624 INFO L85 PathProgramCache]: Analyzing trace with hash 373669115, now seen corresponding path program 1 times [2024-11-14 03:03:50,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:03:50,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945413401] [2024-11-14 03:03:50,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:03:50,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:03:50,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:03:50,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [582189608] [2024-11-14 03:03:50,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:03:50,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:03:50,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:03:50,672 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:03:50,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 03:03:50,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:03:50,734 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 03:03:50,736 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:03:50,776 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 03:03:50,776 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:03:50,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:03:50,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945413401] [2024-11-14 03:03:50,777 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:03:50,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582189608] [2024-11-14 03:03:50,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582189608] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:03:50,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:03:50,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 03:03:50,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7660303] [2024-11-14 03:03:50,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:03:50,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:03:50,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:03:50,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:03:50,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:03:50,780 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-14 03:03:50,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:03:50,846 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2024-11-14 03:03:50,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:03:50,847 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 23 [2024-11-14 03:03:50,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:03:50,848 INFO L225 Difference]: With dead ends: 44 [2024-11-14 03:03:50,848 INFO L226 Difference]: Without dead ends: 42 [2024-11-14 03:03:50,848 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:03:50,849 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 5 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:03:50,849 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 113 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 03:03:50,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-14 03:03:50,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2024-11-14 03:03:50,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-14 03:03:50,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 49 transitions. [2024-11-14 03:03:50,869 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 49 transitions. Word has length 23 [2024-11-14 03:03:50,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:03:50,869 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 49 transitions. [2024-11-14 03:03:50,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-14 03:03:50,870 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 49 transitions. [2024-11-14 03:03:50,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-14 03:03:50,871 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:03:50,872 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:03:50,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 03:03:51,075 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:03:51,076 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:03:51,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:03:51,076 INFO L85 PathProgramCache]: Analyzing trace with hash 275905003, now seen corresponding path program 1 times [2024-11-14 03:03:51,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:03:51,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430696365] [2024-11-14 03:03:51,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:03:51,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:03:51,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:03:51,261 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 03:03:51,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:03:51,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430696365] [2024-11-14 03:03:51,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430696365] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:03:51,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:03:51,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 03:03:51,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032694383] [2024-11-14 03:03:51,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:03:51,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 03:03:51,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:03:51,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 03:03:51,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:03:51,263 INFO L87 Difference]: Start difference. First operand 37 states and 49 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-14 03:03:51,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:03:51,337 INFO L93 Difference]: Finished difference Result 65 states and 87 transitions. [2024-11-14 03:03:51,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 03:03:51,340 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 26 [2024-11-14 03:03:51,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:03:51,342 INFO L225 Difference]: With dead ends: 65 [2024-11-14 03:03:51,342 INFO L226 Difference]: Without dead ends: 39 [2024-11-14 03:03:51,343 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:03:51,346 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 6 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:03:51,347 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 90 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:03:51,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-14 03:03:51,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-14 03:03:51,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.25) internal successors, (30), 26 states have internal predecessors, (30), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-14 03:03:51,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2024-11-14 03:03:51,365 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 26 [2024-11-14 03:03:51,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:03:51,365 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2024-11-14 03:03:51,366 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-14 03:03:51,366 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2024-11-14 03:03:51,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-14 03:03:51,369 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:03:51,369 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:03:51,370 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 03:03:51,370 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:03:51,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:03:51,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1646055805, now seen corresponding path program 1 times [2024-11-14 03:03:51,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:03:51,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600476776] [2024-11-14 03:03:51,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:03:51,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:03:51,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:03:51,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1917828037] [2024-11-14 03:03:51,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:03:51,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:03:51,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:03:51,403 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:03:51,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 03:03:51,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:03:51,482 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-14 03:03:51,484 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:03:51,619 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 03:03:51,620 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:03:51,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:03:51,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600476776] [2024-11-14 03:03:51,620 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:03:51,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917828037] [2024-11-14 03:03:51,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917828037] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:03:51,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:03:51,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 03:03:51,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017404503] [2024-11-14 03:03:51,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:03:51,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:03:51,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:03:51,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:03:51,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:03:51,623 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 03:03:51,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:03:51,711 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2024-11-14 03:03:51,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:03:51,712 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 28 [2024-11-14 03:03:51,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:03:51,713 INFO L225 Difference]: With dead ends: 54 [2024-11-14 03:03:51,713 INFO L226 Difference]: Without dead ends: 52 [2024-11-14 03:03:51,714 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:03:51,715 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:03:51,715 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 123 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:03:51,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-14 03:03:51,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2024-11-14 03:03:51,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 33 states have internal predecessors, (38), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-14 03:03:51,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2024-11-14 03:03:51,730 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 28 [2024-11-14 03:03:51,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:03:51,730 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2024-11-14 03:03:51,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 03:03:51,730 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2024-11-14 03:03:51,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-14 03:03:51,731 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:03:51,731 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:03:51,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 03:03:51,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:03:51,936 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:03:51,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:03:51,936 INFO L85 PathProgramCache]: Analyzing trace with hash 204769723, now seen corresponding path program 1 times [2024-11-14 03:03:51,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:03:51,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094202418] [2024-11-14 03:03:51,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:03:51,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:03:51,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:03:51,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1237304258] [2024-11-14 03:03:51,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:03:51,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:03:51,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:03:51,973 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:03:51,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 03:03:52,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:03:52,055 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-14 03:03:52,057 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:03:52,189 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 03:03:52,189 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:03:52,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:03:52,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094202418] [2024-11-14 03:03:52,190 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:03:52,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237304258] [2024-11-14 03:03:52,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237304258] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:03:52,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:03:52,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 03:03:52,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486274653] [2024-11-14 03:03:52,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:03:52,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:03:52,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:03:52,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:03:52,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:03:52,194 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-14 03:03:52,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:03:52,298 INFO L93 Difference]: Finished difference Result 58 states and 75 transitions. [2024-11-14 03:03:52,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:03:52,299 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 33 [2024-11-14 03:03:52,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:03:52,300 INFO L225 Difference]: With dead ends: 58 [2024-11-14 03:03:52,302 INFO L226 Difference]: Without dead ends: 56 [2024-11-14 03:03:52,303 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:03:52,304 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 6 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:03:52,304 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 114 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:03:52,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-14 03:03:52,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2024-11-14 03:03:52,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 36 states have internal predecessors, (41), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-14 03:03:52,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2024-11-14 03:03:52,330 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 33 [2024-11-14 03:03:52,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:03:52,331 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2024-11-14 03:03:52,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-14 03:03:52,332 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2024-11-14 03:03:52,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-14 03:03:52,333 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:03:52,333 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:03:52,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 03:03:52,533 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:03:52,534 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:03:52,534 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:03:52,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1859090109, now seen corresponding path program 1 times [2024-11-14 03:03:52,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:03:52,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284240039] [2024-11-14 03:03:52,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:03:52,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:03:52,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:03:52,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [864226862] [2024-11-14 03:03:52,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:03:52,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:03:52,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:03:52,574 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:03:52,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 03:03:52,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:03:52,677 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-14 03:03:52,679 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:03:52,873 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 03:03:52,873 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:03:52,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:03:52,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284240039] [2024-11-14 03:03:52,873 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:03:52,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864226862] [2024-11-14 03:03:52,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864226862] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:03:52,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:03:52,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 03:03:52,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564636787] [2024-11-14 03:03:52,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:03:52,874 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:03:52,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:03:52,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:03:52,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:03:52,877 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:03:52,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:03:52,979 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2024-11-14 03:03:52,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:03:52,980 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 38 [2024-11-14 03:03:52,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:03:52,981 INFO L225 Difference]: With dead ends: 62 [2024-11-14 03:03:52,981 INFO L226 Difference]: Without dead ends: 60 [2024-11-14 03:03:52,982 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:03:52,982 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:03:52,983 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 111 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:03:52,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-14 03:03:52,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-11-14 03:03:52,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 39 states have internal predecessors, (44), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-14 03:03:52,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 75 transitions. [2024-11-14 03:03:52,997 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 75 transitions. Word has length 38 [2024-11-14 03:03:52,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:03:52,998 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 75 transitions. [2024-11-14 03:03:52,998 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 03:03:52,998 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 75 transitions. [2024-11-14 03:03:52,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-14 03:03:52,999 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:03:53,000 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:03:53,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 03:03:53,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-14 03:03:53,204 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:03:53,205 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:03:53,205 INFO L85 PathProgramCache]: Analyzing trace with hash 39088359, now seen corresponding path program 1 times [2024-11-14 03:03:53,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:03:53,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837656854] [2024-11-14 03:03:53,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:03:53,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:03:53,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:03:53,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [926255227] [2024-11-14 03:03:53,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:03:53,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:03:53,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:03:53,251 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:03:53,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 03:03:53,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:03:53,349 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-14 03:03:53,352 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:03:53,477 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-14 03:03:53,478 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:03:53,658 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-14 03:03:53,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:03:53,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837656854] [2024-11-14 03:03:53,660 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:03:53,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926255227] [2024-11-14 03:03:53,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926255227] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:03:53,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [210469266] [2024-11-14 03:03:53,663 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-14 03:03:53,665 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:03:53,666 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:03:53,666 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:03:53,666 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:03:58,443 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-14 03:03:58,449 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 03:03:58,451 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:04:02,629 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1990#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-14 03:04:02,629 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:04:02,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:04:02,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2024-11-14 03:04:02,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609796031] [2024-11-14 03:04:02,630 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 03:04:02,630 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 03:04:02,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:04:02,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 03:04:02,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2024-11-14 03:04:02,632 INFO L87 Difference]: Start difference. First operand 59 states and 75 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-14 03:04:02,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:04:02,802 INFO L93 Difference]: Finished difference Result 89 states and 124 transitions. [2024-11-14 03:04:02,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 03:04:02,802 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 46 [2024-11-14 03:04:02,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:04:02,805 INFO L225 Difference]: With dead ends: 89 [2024-11-14 03:04:02,805 INFO L226 Difference]: Without dead ends: 87 [2024-11-14 03:04:02,806 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 108 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2024-11-14 03:04:02,806 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 9 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:04:02,807 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 192 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:04:02,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-14 03:04:02,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 55. [2024-11-14 03:04:02,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 35 states have internal predecessors, (41), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-14 03:04:02,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2024-11-14 03:04:02,826 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 46 [2024-11-14 03:04:02,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:04:02,826 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2024-11-14 03:04:02,827 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-14 03:04:02,827 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2024-11-14 03:04:02,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-14 03:04:02,830 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:04:02,830 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:04:02,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 03:04:03,030 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:04:03,031 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:04:03,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:04:03,031 INFO L85 PathProgramCache]: Analyzing trace with hash 212178052, now seen corresponding path program 1 times [2024-11-14 03:04:03,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:04:03,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491336519] [2024-11-14 03:04:03,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:04:03,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:04:03,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:04:03,220 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-14 03:04:03,220 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:04:03,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491336519] [2024-11-14 03:04:03,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491336519] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:04:03,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645826555] [2024-11-14 03:04:03,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:04:03,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:04:03,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:04:03,225 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:04:03,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 03:04:03,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:04:03,304 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 03:04:03,307 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:04:03,407 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-14 03:04:03,408 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:04:03,536 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-14 03:04:03,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645826555] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:04:03,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [136135152] [2024-11-14 03:04:03,541 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-14 03:04:03,541 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:04:03,542 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:04:03,542 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:04:03,542 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:04:08,866 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 103 for LOIs [2024-11-14 03:04:09,098 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 03:04:09,100 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:04:14,355 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2527#(and (<= 2 ~counter~0) (<= ~counter~0 10) (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 03:04:14,355 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:04:14,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:04:14,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 12 [2024-11-14 03:04:14,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935001618] [2024-11-14 03:04:14,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:04:14,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-14 03:04:14,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:04:14,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-14 03:04:14,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=684, Unknown=0, NotChecked=0, Total=870 [2024-11-14 03:04:14,358 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 6 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) [2024-11-14 03:04:14,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:04:14,630 INFO L93 Difference]: Finished difference Result 208 states and 247 transitions. [2024-11-14 03:04:14,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 03:04:14,631 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 6 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) Word has length 47 [2024-11-14 03:04:14,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:04:14,635 INFO L225 Difference]: With dead ends: 208 [2024-11-14 03:04:14,635 INFO L226 Difference]: Without dead ends: 200 [2024-11-14 03:04:14,636 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 114 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=211, Invalid=845, Unknown=0, NotChecked=0, Total=1056 [2024-11-14 03:04:14,637 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 86 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:04:14,637 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 134 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:04:14,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2024-11-14 03:04:14,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 192. [2024-11-14 03:04:14,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 122 states have (on average 1.1967213114754098) internal successors, (146), 126 states have internal predecessors, (146), 44 states have call successors, (44), 25 states have call predecessors, (44), 25 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2024-11-14 03:04:14,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 230 transitions. [2024-11-14 03:04:14,693 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 230 transitions. Word has length 47 [2024-11-14 03:04:14,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:04:14,693 INFO L471 AbstractCegarLoop]: Abstraction has 192 states and 230 transitions. [2024-11-14 03:04:14,694 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 6 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) [2024-11-14 03:04:14,694 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 230 transitions. [2024-11-14 03:04:14,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-14 03:04:14,695 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:04:14,695 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:04:14,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-14 03:04:14,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-14 03:04:14,896 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:04:14,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:04:14,896 INFO L85 PathProgramCache]: Analyzing trace with hash -2018078149, now seen corresponding path program 1 times [2024-11-14 03:04:14,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:04:14,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128570683] [2024-11-14 03:04:14,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:04:14,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:04:14,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:04:15,146 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-14 03:04:15,146 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:04:15,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128570683] [2024-11-14 03:04:15,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128570683] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:04:15,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329854497] [2024-11-14 03:04:15,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:04:15,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:04:15,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:04:15,150 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:04:15,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 03:04:15,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:04:15,229 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 03:04:15,231 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:04:15,270 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-14 03:04:15,271 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:04:15,383 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-14 03:04:15,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329854497] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:04:15,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1794397583] [2024-11-14 03:04:15,385 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-14 03:04:15,386 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:04:15,386 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:04:15,386 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:04:15,386 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:04:19,750 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 107 for LOIs [2024-11-14 03:04:19,940 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 03:04:19,941 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:04:25,149 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3462#(and (<= 2 ~counter~0) (<= ~counter~0 10) (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 03:04:25,149 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:04:25,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:04:25,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2024-11-14 03:04:25,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350321531] [2024-11-14 03:04:25,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:04:25,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 03:04:25,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:04:25,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 03:04:25,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2024-11-14 03:04:25,151 INFO L87 Difference]: Start difference. First operand 192 states and 230 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-14 03:04:25,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:04:25,511 INFO L93 Difference]: Finished difference Result 276 states and 361 transitions. [2024-11-14 03:04:25,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 03:04:25,512 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 48 [2024-11-14 03:04:25,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:04:25,515 INFO L225 Difference]: With dead ends: 276 [2024-11-14 03:04:25,515 INFO L226 Difference]: Without dead ends: 256 [2024-11-14 03:04:25,516 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 118 SyntacticMatches, 8 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=173, Invalid=697, Unknown=0, NotChecked=0, Total=870 [2024-11-14 03:04:25,517 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 60 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:04:25,517 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 230 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:04:25,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2024-11-14 03:04:25,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 232. [2024-11-14 03:04:25,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 149 states have (on average 1.2281879194630871) internal successors, (183), 152 states have internal predecessors, (183), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2024-11-14 03:04:25,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 296 transitions. [2024-11-14 03:04:25,584 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 296 transitions. Word has length 48 [2024-11-14 03:04:25,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:04:25,584 INFO L471 AbstractCegarLoop]: Abstraction has 232 states and 296 transitions. [2024-11-14 03:04:25,585 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-14 03:04:25,585 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 296 transitions. [2024-11-14 03:04:25,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-14 03:04:25,586 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:04:25,586 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:04:25,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-14 03:04:25,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-14 03:04:25,810 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:04:25,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:04:25,811 INFO L85 PathProgramCache]: Analyzing trace with hash 435271584, now seen corresponding path program 1 times [2024-11-14 03:04:25,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:04:25,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613351569] [2024-11-14 03:04:25,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:04:25,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:04:25,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:04:26,018 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-14 03:04:26,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:04:26,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613351569] [2024-11-14 03:04:26,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613351569] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:04:26,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250590920] [2024-11-14 03:04:26,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:04:26,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:04:26,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:04:26,022 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:04:26,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 03:04:26,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:04:26,098 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 03:04:26,100 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:04:26,159 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-14 03:04:26,159 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:04:26,262 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-14 03:04:26,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250590920] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:04:26,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [531363445] [2024-11-14 03:04:26,265 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-14 03:04:26,265 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:04:26,265 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:04:26,266 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:04:26,266 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:04:32,172 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-14 03:04:32,175 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 03:04:32,179 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:04:36,330 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4590#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-14 03:04:36,331 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:04:36,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:04:36,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 12 [2024-11-14 03:04:36,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911344863] [2024-11-14 03:04:36,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:04:36,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-14 03:04:36,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:04:36,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-14 03:04:36,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2024-11-14 03:04:36,332 INFO L87 Difference]: Start difference. First operand 232 states and 296 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 6 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) [2024-11-14 03:04:36,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:04:36,597 INFO L93 Difference]: Finished difference Result 341 states and 445 transitions. [2024-11-14 03:04:36,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 03:04:36,597 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 6 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) Word has length 50 [2024-11-14 03:04:36,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:04:36,600 INFO L225 Difference]: With dead ends: 341 [2024-11-14 03:04:36,601 INFO L226 Difference]: Without dead ends: 245 [2024-11-14 03:04:36,602 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=205, Invalid=1127, Unknown=0, NotChecked=0, Total=1332 [2024-11-14 03:04:36,603 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 69 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:04:36,603 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 151 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:04:36,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2024-11-14 03:04:36,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 241. [2024-11-14 03:04:36,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 158 states have (on average 1.1772151898734178) internal successors, (186), 161 states have internal predecessors, (186), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2024-11-14 03:04:36,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 299 transitions. [2024-11-14 03:04:36,640 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 299 transitions. Word has length 50 [2024-11-14 03:04:36,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:04:36,641 INFO L471 AbstractCegarLoop]: Abstraction has 241 states and 299 transitions. [2024-11-14 03:04:36,641 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 6 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 5 states have call predecessors, (24), 5 states have call successors, (24) [2024-11-14 03:04:36,641 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 299 transitions. [2024-11-14 03:04:36,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-14 03:04:36,642 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:04:36,642 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:04:36,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 03:04:36,842 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:04:36,842 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:04:36,843 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:04:36,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1360011404, now seen corresponding path program 1 times [2024-11-14 03:04:36,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:04:36,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969644917] [2024-11-14 03:04:36,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:04:36,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:04:36,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:04:36,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1228480390] [2024-11-14 03:04:36,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:04:36,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:04:36,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:04:36,866 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:04:36,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 03:04:36,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:04:36,955 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-14 03:04:36,957 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:04:37,293 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-14 03:04:37,293 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:04:37,518 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-14 03:04:37,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:04:37,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969644917] [2024-11-14 03:04:37,518 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:04:37,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228480390] [2024-11-14 03:04:37,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228480390] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:04:37,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1151213081] [2024-11-14 03:04:37,520 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-14 03:04:37,521 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:04:37,521 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:04:37,521 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:04:37,521 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:04:40,916 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 103 for LOIs [2024-11-14 03:04:41,060 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 03:04:41,061 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:04:45,946 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5855#(and (<= 2 ~counter~0) (<= ~counter~0 10) (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 03:04:45,946 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:04:45,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:04:45,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2024-11-14 03:04:45,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732089833] [2024-11-14 03:04:45,946 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 03:04:45,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-14 03:04:45,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:04:45,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-14 03:04:45,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2024-11-14 03:04:45,948 INFO L87 Difference]: Start difference. First operand 241 states and 299 transitions. Second operand has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2024-11-14 03:04:47,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:04:47,519 INFO L93 Difference]: Finished difference Result 294 states and 377 transitions. [2024-11-14 03:04:47,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 03:04:47,520 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) Word has length 55 [2024-11-14 03:04:47,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:04:47,523 INFO L225 Difference]: With dead ends: 294 [2024-11-14 03:04:47,523 INFO L226 Difference]: Without dead ends: 289 [2024-11-14 03:04:47,524 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 126 SyntacticMatches, 7 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=240, Invalid=1320, Unknown=0, NotChecked=0, Total=1560 [2024-11-14 03:04:47,525 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 60 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:04:47,525 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 360 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 03:04:47,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2024-11-14 03:04:47,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 278. [2024-11-14 03:04:47,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 181 states have (on average 1.1933701657458564) internal successors, (216), 185 states have internal predecessors, (216), 69 states have call successors, (69), 27 states have call predecessors, (69), 27 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) [2024-11-14 03:04:47,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 350 transitions. [2024-11-14 03:04:47,583 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 350 transitions. Word has length 55 [2024-11-14 03:04:47,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:04:47,584 INFO L471 AbstractCegarLoop]: Abstraction has 278 states and 350 transitions. [2024-11-14 03:04:47,584 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2024-11-14 03:04:47,584 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 350 transitions. [2024-11-14 03:04:47,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-14 03:04:47,586 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:04:47,586 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:04:47,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 03:04:47,790 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:04:47,791 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:04:47,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:04:47,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1294612630, now seen corresponding path program 2 times [2024-11-14 03:04:47,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:04:47,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097184022] [2024-11-14 03:04:47,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:04:47,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:04:47,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:04:47,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1942940983] [2024-11-14 03:04:47,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:04:47,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:04:47,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:04:47,839 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:04:47,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 03:04:47,958 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 03:04:47,958 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:04:47,960 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-14 03:04:47,963 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:04:48,207 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-11-14 03:04:48,207 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:04:48,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:04:48,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097184022] [2024-11-14 03:04:48,329 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:04:48,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942940983] [2024-11-14 03:04:48,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942940983] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:04:48,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1776389888] [2024-11-14 03:04:48,331 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-14 03:04:48,331 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:04:48,332 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:04:48,332 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:04:48,332 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:04:51,503 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 107 for LOIs [2024-11-14 03:04:51,655 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 03:04:51,656 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:04:57,105 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7032#(and (<= 2 ~counter~0) (<= ~counter~0 10) (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 03:04:57,105 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:04:57,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:04:57,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-11-14 03:04:57,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247878440] [2024-11-14 03:04:57,106 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 03:04:57,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 03:04:57,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:04:57,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 03:04:57,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2024-11-14 03:04:57,107 INFO L87 Difference]: Start difference. First operand 278 states and 350 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-14 03:04:57,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:04:57,346 INFO L93 Difference]: Finished difference Result 300 states and 377 transitions. [2024-11-14 03:04:57,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 03:04:57,347 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 60 [2024-11-14 03:04:57,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:04:57,350 INFO L225 Difference]: With dead ends: 300 [2024-11-14 03:04:57,350 INFO L226 Difference]: Without dead ends: 298 [2024-11-14 03:04:57,351 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 107 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2024-11-14 03:04:57,351 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 16 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:04:57,352 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 216 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:04:57,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2024-11-14 03:04:57,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 297. [2024-11-14 03:04:57,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 193 states have (on average 1.1917098445595855) internal successors, (230), 197 states have internal predecessors, (230), 73 states have call successors, (73), 30 states have call predecessors, (73), 30 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2024-11-14 03:04:57,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 372 transitions. [2024-11-14 03:04:57,416 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 372 transitions. Word has length 60 [2024-11-14 03:04:57,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:04:57,416 INFO L471 AbstractCegarLoop]: Abstraction has 297 states and 372 transitions. [2024-11-14 03:04:57,416 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-14 03:04:57,416 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 372 transitions. [2024-11-14 03:04:57,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-14 03:04:57,417 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:04:57,418 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:04:57,426 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 03:04:57,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-14 03:04:57,618 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:04:57,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:04:57,619 INFO L85 PathProgramCache]: Analyzing trace with hash 695042292, now seen corresponding path program 3 times [2024-11-14 03:04:57,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:04:57,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258426784] [2024-11-14 03:04:57,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:04:57,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:04:57,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:04:57,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1200066941] [2024-11-14 03:04:57,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:04:57,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:04:57,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:04:57,650 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:04:57,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 03:04:57,747 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:04:57,748 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:04:57,750 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-14 03:04:57,752 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:04:58,519 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 31 proven. 13 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-11-14 03:04:58,519 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:04:59,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:04:59,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258426784] [2024-11-14 03:04:59,380 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:04:59,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200066941] [2024-11-14 03:04:59,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200066941] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:04:59,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1662986456] [2024-11-14 03:04:59,382 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-14 03:04:59,382 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:04:59,382 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:04:59,382 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:04:59,382 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:05:02,563 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 103 for LOIs [2024-11-14 03:05:02,709 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 03:05:02,711 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:05:10,152 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8271#(and (<= 2 ~counter~0) (<= ~counter~0 10) (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 03:05:10,152 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:05:10,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:05:10,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2024-11-14 03:05:10,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058408743] [2024-11-14 03:05:10,152 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 03:05:10,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-14 03:05:10,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:05:10,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-14 03:05:10,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1024, Unknown=0, NotChecked=0, Total=1190 [2024-11-14 03:05:10,154 INFO L87 Difference]: Start difference. First operand 297 states and 372 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2024-11-14 03:05:10,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:05:10,764 INFO L93 Difference]: Finished difference Result 312 states and 386 transitions. [2024-11-14 03:05:10,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 03:05:10,764 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 65 [2024-11-14 03:05:10,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:05:10,767 INFO L225 Difference]: With dead ends: 312 [2024-11-14 03:05:10,768 INFO L226 Difference]: Without dead ends: 308 [2024-11-14 03:05:10,769 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 114 SyntacticMatches, 9 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=191, Invalid=1215, Unknown=0, NotChecked=0, Total=1406 [2024-11-14 03:05:10,769 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 38 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:05:10,770 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 176 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 03:05:10,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2024-11-14 03:05:10,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 307. [2024-11-14 03:05:10,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 201 states have (on average 1.1791044776119404) internal successors, (237), 204 states have internal predecessors, (237), 73 states have call successors, (73), 33 states have call predecessors, (73), 32 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2024-11-14 03:05:10,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 379 transitions. [2024-11-14 03:05:10,831 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 379 transitions. Word has length 65 [2024-11-14 03:05:10,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:05:10,831 INFO L471 AbstractCegarLoop]: Abstraction has 307 states and 379 transitions. [2024-11-14 03:05:10,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2024-11-14 03:05:10,832 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 379 transitions. [2024-11-14 03:05:10,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-14 03:05:10,833 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:05:10,833 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:05:10,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-14 03:05:11,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:05:11,038 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:05:11,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:05:11,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1356849103, now seen corresponding path program 1 times [2024-11-14 03:05:11,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:05:11,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972764818] [2024-11-14 03:05:11,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:05:11,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:05:11,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:05:11,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [758476320] [2024-11-14 03:05:11,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:05:11,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:05:11,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:05:11,066 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:05:11,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 03:05:11,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:05:11,164 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-14 03:05:11,166 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:05:11,952 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2024-11-14 03:05:11,952 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:05:13,445 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2024-11-14 03:05:13,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:05:13,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972764818] [2024-11-14 03:05:13,445 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:05:13,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758476320] [2024-11-14 03:05:13,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758476320] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:05:13,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1912691574] [2024-11-14 03:05:13,447 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-14 03:05:13,447 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:05:13,448 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:05:13,448 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:05:13,448 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:05:22,999 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-14 03:05:23,002 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 03:05:23,003 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:05:25,241 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9695#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-14 03:05:25,241 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:05:25,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:05:25,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2024-11-14 03:05:25,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995373017] [2024-11-14 03:05:25,241 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 03:05:25,242 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-14 03:05:25,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:05:25,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-14 03:05:25,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1193, Unknown=0, NotChecked=0, Total=1332 [2024-11-14 03:05:25,244 INFO L87 Difference]: Start difference. First operand 307 states and 379 transitions. Second operand has 20 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2024-11-14 03:05:28,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 03:05:30,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:05:30,996 INFO L93 Difference]: Finished difference Result 451 states and 614 transitions. [2024-11-14 03:05:30,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-14 03:05:30,997 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 71 [2024-11-14 03:05:30,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:05:31,000 INFO L225 Difference]: With dead ends: 451 [2024-11-14 03:05:31,000 INFO L226 Difference]: Without dead ends: 444 [2024-11-14 03:05:31,002 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=378, Invalid=2702, Unknown=0, NotChecked=0, Total=3080 [2024-11-14 03:05:31,003 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 136 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2024-11-14 03:05:31,004 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 513 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2024-11-14 03:05:31,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2024-11-14 03:05:31,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 407. [2024-11-14 03:05:31,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 260 states have (on average 1.2461538461538462) internal successors, (324), 263 states have internal predecessors, (324), 112 states have call successors, (112), 34 states have call predecessors, (112), 34 states have return successors, (110), 109 states have call predecessors, (110), 110 states have call successors, (110) [2024-11-14 03:05:31,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 546 transitions. [2024-11-14 03:05:31,122 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 546 transitions. Word has length 71 [2024-11-14 03:05:31,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:05:31,123 INFO L471 AbstractCegarLoop]: Abstraction has 407 states and 546 transitions. [2024-11-14 03:05:31,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2024-11-14 03:05:31,123 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 546 transitions. [2024-11-14 03:05:31,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-14 03:05:31,124 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:05:31,124 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:05:31,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-14 03:05:31,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-14 03:05:31,325 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:05:31,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:05:31,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1564111963, now seen corresponding path program 4 times [2024-11-14 03:05:31,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:05:31,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077540065] [2024-11-14 03:05:31,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:05:31,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:05:31,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:05:31,500 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-11-14 03:05:31,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:05:31,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077540065] [2024-11-14 03:05:31,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077540065] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:05:31,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:05:31,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 03:05:31,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961134803] [2024-11-14 03:05:31,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:05:31,502 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:05:31,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:05:31,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:05:31,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:05:31,504 INFO L87 Difference]: Start difference. First operand 407 states and 546 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2024-11-14 03:05:31,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:05:31,773 INFO L93 Difference]: Finished difference Result 607 states and 867 transitions. [2024-11-14 03:05:31,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 03:05:31,774 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 87 [2024-11-14 03:05:31,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:05:31,779 INFO L225 Difference]: With dead ends: 607 [2024-11-14 03:05:31,779 INFO L226 Difference]: Without dead ends: 459 [2024-11-14 03:05:31,780 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:05:31,781 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 12 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:05:31,782 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 169 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:05:31,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2024-11-14 03:05:31,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 407. [2024-11-14 03:05:31,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 264 states have (on average 1.2424242424242424) internal successors, (328), 267 states have internal predecessors, (328), 108 states have call successors, (108), 34 states have call predecessors, (108), 34 states have return successors, (106), 105 states have call predecessors, (106), 106 states have call successors, (106) [2024-11-14 03:05:31,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 542 transitions. [2024-11-14 03:05:31,914 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 542 transitions. Word has length 87 [2024-11-14 03:05:31,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:05:31,915 INFO L471 AbstractCegarLoop]: Abstraction has 407 states and 542 transitions. [2024-11-14 03:05:31,915 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2024-11-14 03:05:31,915 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 542 transitions. [2024-11-14 03:05:31,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-14 03:05:31,917 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:05:31,917 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:05:31,917 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-14 03:05:31,917 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:05:31,918 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:05:31,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1019121120, now seen corresponding path program 1 times [2024-11-14 03:05:31,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:05:31,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792186012] [2024-11-14 03:05:31,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:05:31,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:05:31,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:05:31,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1139502767] [2024-11-14 03:05:31,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:05:31,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:05:31,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:05:31,952 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:05:31,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 03:05:32,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:05:32,066 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-14 03:05:32,072 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:05:33,426 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 68 proven. 33 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2024-11-14 03:05:33,426 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:06:15,027 WARN L873 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse1 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse6 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse7 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|))) (let ((.cse2 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse3 (* |c_ULTIMATE.start_main_~yy~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse4 (+ .cse6 .cse7)) (.cse5 (+ .cse0 .cse1))) (or (not (= (+ .cse0 .cse1 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~b~0#1|)) (+ .cse2 .cse3 |c_ULTIMATE.start_main_~b~0#1|))) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|) .cse2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|) .cse3) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|) (* |c_ULTIMATE.start_main_~yy~0#1| |c_ULTIMATE.start_main_~r~0#1|) (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~p~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|))) (= .cse4 .cse5) (< (+ .cse0 .cse1 |c_ULTIMATE.start_main_~b~0#1|) (+ .cse6 .cse7 1)) (not (= (+ .cse0 .cse1 |c_ULTIMATE.start_main_~a~0#1|) (+ .cse6 .cse7 |c_ULTIMATE.start_main_~b~0#1|))) (< .cse4 .cse5)))) is different from true [2024-11-14 03:06:18,002 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 68 proven. 27 refuted. 0 times theorem prover too weak. 178 trivial. 3 not checked. [2024-11-14 03:06:18,002 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:06:18,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792186012] [2024-11-14 03:06:18,002 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:06:18,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139502767] [2024-11-14 03:06:18,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139502767] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:06:18,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [377033519] [2024-11-14 03:06:18,005 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-14 03:06:18,005 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:06:18,005 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:06:18,005 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:06:18,005 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:06:28,041 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-14 03:06:28,045 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 03:06:28,046 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:06:40,390 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13223#(and (<= ~counter~0 10) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 03:06:40,390 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:06:40,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:06:40,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2024-11-14 03:06:40,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416557476] [2024-11-14 03:06:40,391 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 03:06:40,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-14 03:06:40,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:06:40,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-14 03:06:40,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1508, Unknown=4, NotChecked=80, Total=1806 [2024-11-14 03:06:40,393 INFO L87 Difference]: Start difference. First operand 407 states and 542 transitions. Second operand has 24 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 20 states have internal predecessors, (48), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 12 states have call predecessors, (30), 10 states have call successors, (30) [2024-11-14 03:06:42,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-14 03:06:54,921 WARN L286 SmtUtils]: Spent 7.02s on a formula simplification. DAG size of input: 62 DAG size of output: 61 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 03:07:02,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 03:07:17,170 WARN L286 SmtUtils]: Spent 5.32s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 03:07:19,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 03:07:26,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 03:07:26,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:07:26,189 INFO L93 Difference]: Finished difference Result 467 states and 632 transitions. [2024-11-14 03:07:26,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-14 03:07:26,191 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 20 states have internal predecessors, (48), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 12 states have call predecessors, (30), 10 states have call successors, (30) Word has length 88 [2024-11-14 03:07:26,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:07:26,195 INFO L225 Difference]: With dead ends: 467 [2024-11-14 03:07:26,195 INFO L226 Difference]: Without dead ends: 465 [2024-11-14 03:07:26,196 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 220 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 51.9s TimeCoverageRelationStatistics Valid=418, Invalid=2442, Unknown=6, NotChecked=104, Total=2970 [2024-11-14 03:07:26,197 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 86 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 67 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:07:26,197 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 377 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 440 Invalid, 4 Unknown, 133 Unchecked, 13.6s Time] [2024-11-14 03:07:26,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2024-11-14 03:07:26,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 445. [2024-11-14 03:07:26,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 288 states have (on average 1.25) internal successors, (360), 294 states have internal predecessors, (360), 120 states have call successors, (120), 36 states have call predecessors, (120), 36 states have return successors, (118), 114 states have call predecessors, (118), 118 states have call successors, (118) [2024-11-14 03:07:26,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 598 transitions. [2024-11-14 03:07:26,341 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 598 transitions. Word has length 88 [2024-11-14 03:07:26,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:07:26,341 INFO L471 AbstractCegarLoop]: Abstraction has 445 states and 598 transitions. [2024-11-14 03:07:26,341 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 20 states have internal predecessors, (48), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 12 states have call predecessors, (30), 10 states have call successors, (30) [2024-11-14 03:07:26,342 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 598 transitions. [2024-11-14 03:07:26,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-14 03:07:26,343 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:07:26,343 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:07:26,368 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-14 03:07:26,547 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-14 03:07:26,548 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:07:26,548 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:07:26,548 INFO L85 PathProgramCache]: Analyzing trace with hash -704857568, now seen corresponding path program 1 times [2024-11-14 03:07:26,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:07:26,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245542970] [2024-11-14 03:07:26,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:07:26,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:07:26,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:07:26,776 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 46 proven. 11 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2024-11-14 03:07:26,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:07:26,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245542970] [2024-11-14 03:07:26,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245542970] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:07:26,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017156094] [2024-11-14 03:07:26,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:07:26,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:07:26,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:07:26,780 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:07:26,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-14 03:07:26,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:07:26,885 INFO L255 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 03:07:26,887 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:07:26,941 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 92 proven. 11 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2024-11-14 03:07:26,941 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:07:27,110 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 46 proven. 11 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2024-11-14 03:07:27,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017156094] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:07:27,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1939712509] [2024-11-14 03:07:27,112 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2024-11-14 03:07:27,114 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:07:27,114 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:07:27,114 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:07:27,114 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:07:37,328 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-14 03:07:37,331 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 03:07:37,332 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:07:39,103 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15306#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-14 03:07:39,103 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:07:39,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:07:39,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2024-11-14 03:07:39,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23948097] [2024-11-14 03:07:39,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:07:39,104 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 03:07:39,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:07:39,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 03:07:39,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2024-11-14 03:07:39,105 INFO L87 Difference]: Start difference. First operand 445 states and 598 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2024-11-14 03:07:39,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:07:39,776 INFO L93 Difference]: Finished difference Result 628 states and 895 transitions. [2024-11-14 03:07:39,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 03:07:39,777 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 103 [2024-11-14 03:07:39,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:07:39,781 INFO L225 Difference]: With dead ends: 628 [2024-11-14 03:07:39,781 INFO L226 Difference]: Without dead ends: 615 [2024-11-14 03:07:39,782 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 289 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=133, Invalid=1057, Unknown=0, NotChecked=0, Total=1190 [2024-11-14 03:07:39,783 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 33 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:07:39,783 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 361 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:07:39,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2024-11-14 03:07:39,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 483. [2024-11-14 03:07:39,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 318 states have (on average 1.2578616352201257) internal successors, (400), 324 states have internal predecessors, (400), 128 states have call successors, (128), 36 states have call predecessors, (128), 36 states have return successors, (126), 122 states have call predecessors, (126), 126 states have call successors, (126) [2024-11-14 03:07:39,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 654 transitions. [2024-11-14 03:07:39,974 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 654 transitions. Word has length 103 [2024-11-14 03:07:39,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:07:39,976 INFO L471 AbstractCegarLoop]: Abstraction has 483 states and 654 transitions. [2024-11-14 03:07:39,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2024-11-14 03:07:39,976 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 654 transitions. [2024-11-14 03:07:39,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-14 03:07:39,978 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:07:39,978 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:07:39,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-14 03:07:40,178 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:07:40,178 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:07:40,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:07:40,179 INFO L85 PathProgramCache]: Analyzing trace with hash 332066041, now seen corresponding path program 1 times [2024-11-14 03:07:40,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:07:40,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191335034] [2024-11-14 03:07:40,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:07:40,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:07:40,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:07:40,527 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-14 03:07:40,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:07:40,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191335034] [2024-11-14 03:07:40,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191335034] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:07:40,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844870939] [2024-11-14 03:07:40,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:07:40,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:07:40,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:07:40,530 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:07:40,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-14 03:07:40,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:07:40,635 INFO L255 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-14 03:07:40,638 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:07:40,796 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 32 proven. 229 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-14 03:07:40,796 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:07:41,040 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-14 03:07:41,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844870939] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:07:41,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [824080357] [2024-11-14 03:07:41,042 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-14 03:07:41,042 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:07:41,042 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:07:41,043 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:07:41,043 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:07:49,333 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-14 03:07:49,335 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 03:07:49,336 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:07:50,329 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17704#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-14 03:07:50,329 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:07:50,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:07:50,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 16 [2024-11-14 03:07:50,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825352561] [2024-11-14 03:07:50,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:07:50,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-14 03:07:50,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:07:50,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-14 03:07:50,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=824, Unknown=0, NotChecked=0, Total=1056 [2024-11-14 03:07:50,331 INFO L87 Difference]: Start difference. First operand 483 states and 654 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 16 states have internal predecessors, (65), 9 states have call successors, (45), 6 states have call predecessors, (45), 5 states have return successors, (44), 8 states have call predecessors, (44), 8 states have call successors, (44) [2024-11-14 03:07:51,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:07:51,211 INFO L93 Difference]: Finished difference Result 1143 states and 1585 transitions. [2024-11-14 03:07:51,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-14 03:07:51,211 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 16 states have internal predecessors, (65), 9 states have call successors, (45), 6 states have call predecessors, (45), 5 states have return successors, (44), 8 states have call predecessors, (44), 8 states have call successors, (44) Word has length 103 [2024-11-14 03:07:51,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:07:51,218 INFO L225 Difference]: With dead ends: 1143 [2024-11-14 03:07:51,218 INFO L226 Difference]: Without dead ends: 927 [2024-11-14 03:07:51,220 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 283 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=326, Invalid=1314, Unknown=0, NotChecked=0, Total=1640 [2024-11-14 03:07:51,221 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 111 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:07:51,221 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 200 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:07:51,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2024-11-14 03:07:51,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 899. [2024-11-14 03:07:51,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 573 states have (on average 1.212914485165794) internal successors, (695), 587 states have internal predecessors, (695), 249 states have call successors, (249), 76 states have call predecessors, (249), 76 states have return successors, (241), 235 states have call predecessors, (241), 241 states have call successors, (241) [2024-11-14 03:07:51,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1185 transitions. [2024-11-14 03:07:51,591 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1185 transitions. Word has length 103 [2024-11-14 03:07:51,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:07:51,592 INFO L471 AbstractCegarLoop]: Abstraction has 899 states and 1185 transitions. [2024-11-14 03:07:51,592 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 16 states have internal predecessors, (65), 9 states have call successors, (45), 6 states have call predecessors, (45), 5 states have return successors, (44), 8 states have call predecessors, (44), 8 states have call successors, (44) [2024-11-14 03:07:51,592 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1185 transitions. [2024-11-14 03:07:51,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-11-14 03:07:51,594 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:07:51,594 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:07:51,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-14 03:07:51,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:07:51,795 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:07:51,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:07:51,795 INFO L85 PathProgramCache]: Analyzing trace with hash 785094161, now seen corresponding path program 2 times [2024-11-14 03:07:51,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:07:51,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080297540] [2024-11-14 03:07:51,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:07:51,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:07:51,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:07:51,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1967048566] [2024-11-14 03:07:51,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:07:51,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:07:51,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:07:51,835 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:07:51,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-14 03:07:51,961 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 03:07:51,961 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:07:51,962 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-14 03:07:51,964 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:07:52,350 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 29 proven. 43 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2024-11-14 03:07:52,350 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:07:52,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:07:52,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080297540] [2024-11-14 03:07:52,624 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:07:52,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967048566] [2024-11-14 03:07:52,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967048566] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:07:52,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2013696493] [2024-11-14 03:07:52,626 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-14 03:07:52,626 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:07:52,626 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:07:52,626 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:07:52,626 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:08:01,828 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-14 03:08:01,833 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 03:08:01,834 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:08:03,559 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21450#(and (<= ~counter~0 10) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 03:08:03,559 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:08:03,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:08:03,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-11-14 03:08:03,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146050337] [2024-11-14 03:08:03,560 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 03:08:03,560 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-14 03:08:03,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:08:03,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-14 03:08:03,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2024-11-14 03:08:03,561 INFO L87 Difference]: Start difference. First operand 899 states and 1185 transitions. Second operand has 11 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-11-14 03:08:04,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:08:04,260 INFO L93 Difference]: Finished difference Result 994 states and 1321 transitions. [2024-11-14 03:08:04,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 03:08:04,260 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 105 [2024-11-14 03:08:04,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:08:04,267 INFO L225 Difference]: With dead ends: 994 [2024-11-14 03:08:04,268 INFO L226 Difference]: Without dead ends: 988 [2024-11-14 03:08:04,269 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=151, Invalid=1255, Unknown=0, NotChecked=0, Total=1406 [2024-11-14 03:08:04,270 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 31 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:08:04,270 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 262 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:08:04,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2024-11-14 03:08:04,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 976. [2024-11-14 03:08:04,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 622 states have (on average 1.2186495176848875) internal successors, (758), 635 states have internal predecessors, (758), 273 states have call successors, (273), 80 states have call predecessors, (273), 80 states have return successors, (265), 260 states have call predecessors, (265), 265 states have call successors, (265) [2024-11-14 03:08:04,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1296 transitions. [2024-11-14 03:08:04,660 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1296 transitions. Word has length 105 [2024-11-14 03:08:04,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:08:04,660 INFO L471 AbstractCegarLoop]: Abstraction has 976 states and 1296 transitions. [2024-11-14 03:08:04,661 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-11-14 03:08:04,661 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1296 transitions. [2024-11-14 03:08:04,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-11-14 03:08:04,663 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:08:04,663 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:08:04,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-14 03:08:04,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:08:04,864 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:08:04,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:08:04,864 INFO L85 PathProgramCache]: Analyzing trace with hash 703299818, now seen corresponding path program 3 times [2024-11-14 03:08:04,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:08:04,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259931574] [2024-11-14 03:08:04,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:08:04,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:08:04,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:08:04,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [360973479] [2024-11-14 03:08:04,911 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:08:04,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:08:04,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:08:04,913 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:08:04,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-14 03:08:05,020 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:08:05,020 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:08:05,022 INFO L255 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-14 03:08:05,025 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:08:05,942 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 28 proven. 42 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2024-11-14 03:08:05,942 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:08:07,568 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 28 proven. 39 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2024-11-14 03:08:07,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:08:07,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259931574] [2024-11-14 03:08:07,569 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:08:07,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360973479] [2024-11-14 03:08:07,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360973479] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:08:07,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [199262781] [2024-11-14 03:08:07,571 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-14 03:08:07,571 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:08:07,572 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:08:07,572 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:08:07,572 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:08:17,292 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-14 03:08:17,296 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 03:08:17,297 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:08:19,994 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25209#(and (<= ~counter~0 10) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 03:08:19,994 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:08:19,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:08:19,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2024-11-14 03:08:19,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105943271] [2024-11-14 03:08:19,995 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 03:08:19,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-14 03:08:19,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:08:19,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-14 03:08:19,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2024-11-14 03:08:19,997 INFO L87 Difference]: Start difference. First operand 976 states and 1296 transitions. Second operand has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 17 states have internal predecessors, (49), 12 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) [2024-11-14 03:08:29,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:08:29,954 INFO L93 Difference]: Finished difference Result 1203 states and 1630 transitions. [2024-11-14 03:08:29,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-14 03:08:29,955 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 17 states have internal predecessors, (49), 12 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) Word has length 106 [2024-11-14 03:08:29,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:08:29,970 INFO L225 Difference]: With dead ends: 1203 [2024-11-14 03:08:29,970 INFO L226 Difference]: Without dead ends: 1201 [2024-11-14 03:08:29,972 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=561, Invalid=3729, Unknown=0, NotChecked=0, Total=4290 [2024-11-14 03:08:29,974 INFO L432 NwaCegarLoop]: 74 mSDtfsCounter, 158 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:08:29,975 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 784 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2024-11-14 03:08:29,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2024-11-14 03:08:30,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 1144. [2024-11-14 03:08:30,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1144 states, 719 states have (on average 1.2322670375521558) internal successors, (886), 731 states have internal predecessors, (886), 333 states have call successors, (333), 91 states have call predecessors, (333), 91 states have return successors, (325), 321 states have call predecessors, (325), 325 states have call successors, (325) [2024-11-14 03:08:30,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1144 states to 1144 states and 1544 transitions. [2024-11-14 03:08:30,614 INFO L78 Accepts]: Start accepts. Automaton has 1144 states and 1544 transitions. Word has length 106 [2024-11-14 03:08:30,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:08:30,614 INFO L471 AbstractCegarLoop]: Abstraction has 1144 states and 1544 transitions. [2024-11-14 03:08:30,614 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 17 states have internal predecessors, (49), 12 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) [2024-11-14 03:08:30,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1144 states and 1544 transitions. [2024-11-14 03:08:30,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-11-14 03:08:30,616 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:08:30,617 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:08:30,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-14 03:08:30,821 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:08:30,822 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:08:30,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:08:30,822 INFO L85 PathProgramCache]: Analyzing trace with hash -2117817619, now seen corresponding path program 4 times [2024-11-14 03:08:30,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:08:30,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833948180] [2024-11-14 03:08:30,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:08:30,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:08:30,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:08:30,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [735059660] [2024-11-14 03:08:30,853 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:08:30,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:08:30,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:08:30,856 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:08:30,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-14 03:08:30,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:08:30,979 INFO L255 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-14 03:08:30,983 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:08:32,126 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 57 proven. 59 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2024-11-14 03:08:32,126 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:08:34,646 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 65 proven. 48 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2024-11-14 03:08:34,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:08:34,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833948180] [2024-11-14 03:08:34,646 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:08:34,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735059660] [2024-11-14 03:08:34,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735059660] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:08:34,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [815198134] [2024-11-14 03:08:34,648 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-14 03:08:34,648 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:08:34,648 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:08:34,648 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:08:34,648 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:08:43,178 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-14 03:08:43,182 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 03:08:43,183 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:08:45,812 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29652#(and (<= ~counter~0 10) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 03:08:45,812 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:08:45,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:08:45,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2024-11-14 03:08:45,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135788827] [2024-11-14 03:08:45,812 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 03:08:45,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-14 03:08:45,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:08:45,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-14 03:08:45,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1834, Unknown=0, NotChecked=0, Total=2070 [2024-11-14 03:08:45,814 INFO L87 Difference]: Start difference. First operand 1144 states and 1544 transitions. Second operand has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 24 states have internal predecessors, (62), 13 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (36), 13 states have call predecessors, (36), 13 states have call successors, (36) [2024-11-14 03:08:51,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 03:08:53,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:08:53,168 INFO L93 Difference]: Finished difference Result 1477 states and 2022 transitions. [2024-11-14 03:08:53,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-14 03:08:53,169 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 24 states have internal predecessors, (62), 13 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (36), 13 states have call predecessors, (36), 13 states have call successors, (36) Word has length 110 [2024-11-14 03:08:53,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:08:53,178 INFO L225 Difference]: With dead ends: 1477 [2024-11-14 03:08:53,178 INFO L226 Difference]: Without dead ends: 1475 [2024-11-14 03:08:53,180 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1324 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=665, Invalid=4027, Unknown=0, NotChecked=0, Total=4692 [2024-11-14 03:08:53,181 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 176 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:08:53,181 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 581 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2024-11-14 03:08:53,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1475 states. [2024-11-14 03:08:54,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1475 to 1335. [2024-11-14 03:08:54,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 845 states have (on average 1.2437869822485208) internal successors, (1051), 859 states have internal predecessors, (1051), 380 states have call successors, (380), 109 states have call predecessors, (380), 109 states have return successors, (372), 366 states have call predecessors, (372), 372 states have call successors, (372) [2024-11-14 03:08:54,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 1803 transitions. [2024-11-14 03:08:54,023 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 1803 transitions. Word has length 110 [2024-11-14 03:08:54,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:08:54,024 INFO L471 AbstractCegarLoop]: Abstraction has 1335 states and 1803 transitions. [2024-11-14 03:08:54,024 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 24 states have internal predecessors, (62), 13 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (36), 13 states have call predecessors, (36), 13 states have call successors, (36) [2024-11-14 03:08:54,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 1803 transitions. [2024-11-14 03:08:54,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-11-14 03:08:54,026 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:08:54,026 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:08:54,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-14 03:08:54,230 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:08:54,231 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:08:54,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:08:54,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1159768239, now seen corresponding path program 5 times [2024-11-14 03:08:54,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:08:54,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022067900] [2024-11-14 03:08:54,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:08:54,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:08:54,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:08:54,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [113962675] [2024-11-14 03:08:54,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:08:54,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:08:54,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:08:54,264 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:08:54,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-14 03:08:54,903 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 03:08:54,903 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:08:54,905 INFO L255 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-14 03:08:54,907 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:08:56,331 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 71 proven. 50 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2024-11-14 03:08:56,331 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:08:56,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:08:56,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022067900] [2024-11-14 03:08:56,730 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:08:56,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113962675] [2024-11-14 03:08:56,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113962675] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:08:56,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [763067241] [2024-11-14 03:08:56,732 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-14 03:08:56,732 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:08:56,732 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:08:56,732 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:08:56,732 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:09:05,843 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-14 03:09:05,846 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 03:09:05,847 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:09:09,315 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '34503#(and (<= ~counter~0 10) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 03:09:09,316 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:09:09,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:09:09,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-11-14 03:09:09,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142646791] [2024-11-14 03:09:09,316 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 03:09:09,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-14 03:09:09,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:09:09,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-14 03:09:09,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1128, Unknown=0, NotChecked=0, Total=1260 [2024-11-14 03:09:09,318 INFO L87 Difference]: Start difference. First operand 1335 states and 1803 transitions. Second operand has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2024-11-14 03:09:10,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:09:10,932 INFO L93 Difference]: Finished difference Result 1375 states and 1842 transitions. [2024-11-14 03:09:10,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-14 03:09:10,932 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) Word has length 115 [2024-11-14 03:09:10,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:09:10,937 INFO L225 Difference]: With dead ends: 1375 [2024-11-14 03:09:10,937 INFO L226 Difference]: Without dead ends: 1373 [2024-11-14 03:09:10,938 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 198 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=167, Invalid=1555, Unknown=0, NotChecked=0, Total=1722 [2024-11-14 03:09:10,939 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 36 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:09:10,939 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 526 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 03:09:10,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2024-11-14 03:09:11,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 1370. [2024-11-14 03:09:11,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1370 states, 869 states have (on average 1.239355581127733) internal successors, (1077), 883 states have internal predecessors, (1077), 384 states have call successors, (384), 116 states have call predecessors, (384), 116 states have return successors, (376), 370 states have call predecessors, (376), 376 states have call successors, (376) [2024-11-14 03:09:11,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1370 states to 1370 states and 1837 transitions. [2024-11-14 03:09:11,672 INFO L78 Accepts]: Start accepts. Automaton has 1370 states and 1837 transitions. Word has length 115 [2024-11-14 03:09:11,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:09:11,673 INFO L471 AbstractCegarLoop]: Abstraction has 1370 states and 1837 transitions. [2024-11-14 03:09:11,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2024-11-14 03:09:11,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1370 states and 1837 transitions. [2024-11-14 03:09:11,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-11-14 03:09:11,675 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:09:11,675 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:09:11,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-14 03:09:11,876 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:09:11,876 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:09:11,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:09:11,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1242095667, now seen corresponding path program 1 times [2024-11-14 03:09:11,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:09:11,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591409757] [2024-11-14 03:09:11,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:09:11,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:09:11,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:09:12,165 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2024-11-14 03:09:12,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:09:12,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591409757] [2024-11-14 03:09:12,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591409757] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:09:12,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533101174] [2024-11-14 03:09:12,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:09:12,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:09:12,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:09:12,168 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:09:12,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-14 03:09:12,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:09:12,268 INFO L255 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-14 03:09:12,271 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:09:12,455 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 32 proven. 434 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-11-14 03:09:12,455 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:09:12,634 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2024-11-14 03:09:12,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533101174] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:09:12,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1386414335] [2024-11-14 03:09:12,635 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-14 03:09:12,635 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:09:12,635 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:09:12,635 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:09:12,635 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:09:22,432 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-14 03:09:22,436 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 03:09:22,437 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:09:23,960 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '39569#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-14 03:09:23,960 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:09:23,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:09:23,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 16 [2024-11-14 03:09:23,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117129235] [2024-11-14 03:09:23,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:09:23,961 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-14 03:09:23,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:09:23,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-14 03:09:23,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=889, Unknown=0, NotChecked=0, Total=1122 [2024-11-14 03:09:23,963 INFO L87 Difference]: Start difference. First operand 1370 states and 1837 transitions. Second operand has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 11 states have call successors, (57), 7 states have call predecessors, (57), 6 states have return successors, (56), 10 states have call predecessors, (56), 10 states have call successors, (56) [2024-11-14 03:09:25,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:09:25,113 INFO L93 Difference]: Finished difference Result 1422 states and 1894 transitions. [2024-11-14 03:09:25,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-14 03:09:25,114 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 11 states have call successors, (57), 7 states have call predecessors, (57), 6 states have return successors, (56), 10 states have call predecessors, (56), 10 states have call successors, (56) Word has length 120 [2024-11-14 03:09:25,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:09:25,121 INFO L225 Difference]: With dead ends: 1422 [2024-11-14 03:09:25,122 INFO L226 Difference]: Without dead ends: 1390 [2024-11-14 03:09:25,123 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 333 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=315, Invalid=1325, Unknown=0, NotChecked=0, Total=1640 [2024-11-14 03:09:25,124 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 91 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:09:25,124 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 224 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:09:25,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2024-11-14 03:09:25,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1384. [2024-11-14 03:09:25,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 886 states have (on average 1.2200902934537246) internal successors, (1081), 898 states have internal predecessors, (1081), 382 states have call successors, (382), 116 states have call predecessors, (382), 115 states have return successors, (375), 369 states have call predecessors, (375), 375 states have call successors, (375) [2024-11-14 03:09:25,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 1838 transitions. [2024-11-14 03:09:25,775 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 1838 transitions. Word has length 120 [2024-11-14 03:09:25,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:09:25,775 INFO L471 AbstractCegarLoop]: Abstraction has 1384 states and 1838 transitions. [2024-11-14 03:09:25,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 11 states have call successors, (57), 7 states have call predecessors, (57), 6 states have return successors, (56), 10 states have call predecessors, (56), 10 states have call successors, (56) [2024-11-14 03:09:25,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 1838 transitions. [2024-11-14 03:09:25,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-11-14 03:09:25,778 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:09:25,778 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:09:25,801 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-14 03:09:25,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:09:25,982 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:09:25,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:09:25,982 INFO L85 PathProgramCache]: Analyzing trace with hash -155403156, now seen corresponding path program 2 times [2024-11-14 03:09:25,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:09:25,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722022303] [2024-11-14 03:09:25,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:09:25,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:09:26,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:09:26,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1945526592] [2024-11-14 03:09:26,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:09:26,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:09:26,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:09:26,023 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:09:26,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-14 03:09:26,126 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 03:09:26,126 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:09:26,129 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-11-14 03:09:26,132 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:09:27,287 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 75 proven. 58 refuted. 0 times theorem prover too weak. 443 trivial. 0 not checked. [2024-11-14 03:09:27,287 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:09:30,440 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 73 proven. 56 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2024-11-14 03:09:30,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:09:30,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722022303] [2024-11-14 03:09:30,440 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:09:30,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945526592] [2024-11-14 03:09:30,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945526592] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:09:30,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1964811506] [2024-11-14 03:09:30,442 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-14 03:09:30,442 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:09:30,442 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:09:30,442 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:09:30,442 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:09:39,911 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-14 03:09:39,914 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 03:09:39,915 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:09:42,505 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '44743#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-14 03:09:42,505 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:09:42,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:09:42,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2024-11-14 03:09:42,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283782081] [2024-11-14 03:09:42,506 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 03:09:42,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-14 03:09:42,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:09:42,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-14 03:09:42,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1762, Unknown=0, NotChecked=0, Total=1980 [2024-11-14 03:09:42,509 INFO L87 Difference]: Start difference. First operand 1384 states and 1838 transitions. Second operand has 29 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 15 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (40), 13 states have call predecessors, (40), 13 states have call successors, (40) [2024-11-14 03:09:51,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 03:09:56,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:09:56,671 INFO L93 Difference]: Finished difference Result 1542 states and 2079 transitions. [2024-11-14 03:09:56,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-14 03:09:56,671 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 15 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (40), 13 states have call predecessors, (40), 13 states have call successors, (40) Word has length 121 [2024-11-14 03:09:56,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:09:56,680 INFO L225 Difference]: With dead ends: 1542 [2024-11-14 03:09:56,680 INFO L226 Difference]: Without dead ends: 1533 [2024-11-14 03:09:56,683 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1587 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=912, Invalid=5250, Unknown=0, NotChecked=0, Total=6162 [2024-11-14 03:09:56,683 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 263 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 256 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 1143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:09:56,684 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 864 Invalid, 1143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 886 Invalid, 1 Unknown, 0 Unchecked, 6.6s Time] [2024-11-14 03:09:56,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2024-11-14 03:09:57,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1496. [2024-11-14 03:09:57,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 959 states have (on average 1.227320125130344) internal successors, (1177), 970 states have internal predecessors, (1177), 416 states have call successors, (416), 120 states have call predecessors, (416), 120 states have return successors, (412), 405 states have call predecessors, (412), 412 states have call successors, (412) [2024-11-14 03:09:57,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 2005 transitions. [2024-11-14 03:09:57,744 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 2005 transitions. Word has length 121 [2024-11-14 03:09:57,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:09:57,745 INFO L471 AbstractCegarLoop]: Abstraction has 1496 states and 2005 transitions. [2024-11-14 03:09:57,745 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 15 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (40), 13 states have call predecessors, (40), 13 states have call successors, (40) [2024-11-14 03:09:57,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 2005 transitions. [2024-11-14 03:09:57,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-11-14 03:09:57,747 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:09:57,747 INFO L215 NwaCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:09:57,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-14 03:09:57,947 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:09:57,948 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:09:57,948 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:09:57,948 INFO L85 PathProgramCache]: Analyzing trace with hash 46679805, now seen corresponding path program 6 times [2024-11-14 03:09:57,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:09:57,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547055088] [2024-11-14 03:09:57,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:09:57,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:09:57,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:09:57,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1407811083] [2024-11-14 03:09:57,980 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:09:57,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:09:57,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:09:57,982 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:09:57,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-14 03:09:58,101 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:09:58,101 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:09:58,103 INFO L255 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-14 03:09:58,106 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:09:59,129 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 75 proven. 78 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2024-11-14 03:09:59,130 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:09:59,367 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 104 proven. 7 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2024-11-14 03:09:59,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:09:59,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547055088] [2024-11-14 03:09:59,367 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:09:59,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407811083] [2024-11-14 03:09:59,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407811083] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:09:59,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [17409150] [2024-11-14 03:09:59,369 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-14 03:09:59,369 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:09:59,369 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:09:59,369 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:09:59,369 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:10:08,999 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-14 03:10:09,002 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 03:10:09,003 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:10:10,943 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '50367#(and (<= ~counter~0 10) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 03:10:10,943 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:10:10,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:10:10,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 22 [2024-11-14 03:10:10,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333466001] [2024-11-14 03:10:10,943 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 03:10:10,944 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-14 03:10:10,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:10:10,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-14 03:10:10,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1463, Unknown=0, NotChecked=0, Total=1640 [2024-11-14 03:10:10,945 INFO L87 Difference]: Start difference. First operand 1496 states and 2005 transitions. Second operand has 22 states, 21 states have (on average 2.761904761904762) internal successors, (58), 19 states have internal predecessors, (58), 10 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2024-11-14 03:10:14,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:10:14,823 INFO L93 Difference]: Finished difference Result 1560 states and 2076 transitions. [2024-11-14 03:10:14,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-14 03:10:14,823 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.761904761904762) internal successors, (58), 19 states have internal predecessors, (58), 10 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) Word has length 128 [2024-11-14 03:10:14,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:10:14,829 INFO L225 Difference]: With dead ends: 1560 [2024-11-14 03:10:14,830 INFO L226 Difference]: Without dead ends: 1540 [2024-11-14 03:10:14,831 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=288, Invalid=2364, Unknown=0, NotChecked=0, Total=2652 [2024-11-14 03:10:14,831 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 78 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:10:14,832 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 613 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-14 03:10:14,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1540 states. [2024-11-14 03:10:15,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1540 to 1508. [2024-11-14 03:10:15,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1508 states, 972 states have (on average 1.2150205761316872) internal successors, (1181), 981 states have internal predecessors, (1181), 409 states have call successors, (409), 126 states have call predecessors, (409), 126 states have return successors, (406), 400 states have call predecessors, (406), 406 states have call successors, (406) [2024-11-14 03:10:16,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1508 states to 1508 states and 1996 transitions. [2024-11-14 03:10:16,004 INFO L78 Accepts]: Start accepts. Automaton has 1508 states and 1996 transitions. Word has length 128 [2024-11-14 03:10:16,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:10:16,005 INFO L471 AbstractCegarLoop]: Abstraction has 1508 states and 1996 transitions. [2024-11-14 03:10:16,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.761904761904762) internal successors, (58), 19 states have internal predecessors, (58), 10 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2024-11-14 03:10:16,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1508 states and 1996 transitions. [2024-11-14 03:10:16,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-14 03:10:16,008 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:10:16,008 INFO L215 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:10:16,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-14 03:10:16,208 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-14 03:10:16,208 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:10:16,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:10:16,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1982652131, now seen corresponding path program 7 times [2024-11-14 03:10:16,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:10:16,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746749026] [2024-11-14 03:10:16,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:10:16,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:10:16,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:10:16,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1552147374] [2024-11-14 03:10:16,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:10:16,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:10:16,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:10:16,243 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:10:16,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-14 03:10:16,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:10:16,407 INFO L255 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-11-14 03:10:16,411 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:10:26,075 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 131 proven. 130 refuted. 0 times theorem prover too weak. 549 trivial. 0 not checked. [2024-11-14 03:10:26,075 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:10:27,884 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:10:27,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746749026] [2024-11-14 03:10:27,884 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:10:27,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552147374] [2024-11-14 03:10:27,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552147374] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:10:27,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2086568490] [2024-11-14 03:10:27,886 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-14 03:10:27,886 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:10:27,887 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:10:27,887 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:10:27,887 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:10:37,114 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-14 03:10:37,119 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 03:10:37,120 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:10:41,596 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '55724#(and (<= ~counter~0 10) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 03:10:41,596 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:10:41,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:10:41,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-11-14 03:10:41,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126883488] [2024-11-14 03:10:41,596 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 03:10:41,597 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-14 03:10:41,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:10:41,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-14 03:10:41,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1835, Unknown=0, NotChecked=0, Total=2070 [2024-11-14 03:10:41,598 INFO L87 Difference]: Start difference. First operand 1508 states and 1996 transitions. Second operand has 20 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 10 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2024-11-14 03:10:45,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-14 03:10:48,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:10:48,620 INFO L93 Difference]: Finished difference Result 1521 states and 2006 transitions. [2024-11-14 03:10:48,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-14 03:10:48,620 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 10 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) Word has length 138 [2024-11-14 03:10:48,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:10:48,627 INFO L225 Difference]: With dead ends: 1521 [2024-11-14 03:10:48,627 INFO L226 Difference]: Without dead ends: 1519 [2024-11-14 03:10:48,628 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 257 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=318, Invalid=2544, Unknown=0, NotChecked=0, Total=2862 [2024-11-14 03:10:48,629 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 56 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:10:48,629 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 659 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 799 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2024-11-14 03:10:48,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2024-11-14 03:10:49,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 1516. [2024-11-14 03:10:49,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1516 states, 978 states have (on average 1.212678936605317) internal successors, (1186), 987 states have internal predecessors, (1186), 409 states have call successors, (409), 128 states have call predecessors, (409), 128 states have return successors, (406), 400 states have call predecessors, (406), 406 states have call successors, (406) [2024-11-14 03:10:49,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 2001 transitions. [2024-11-14 03:10:49,747 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 2001 transitions. Word has length 138 [2024-11-14 03:10:49,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:10:49,747 INFO L471 AbstractCegarLoop]: Abstraction has 1516 states and 2001 transitions. [2024-11-14 03:10:49,748 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 10 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2024-11-14 03:10:49,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 2001 transitions. [2024-11-14 03:10:49,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2024-11-14 03:10:49,751 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:10:49,751 INFO L215 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:10:49,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-14 03:10:49,951 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-14 03:10:49,952 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:10:49,952 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:10:49,952 INFO L85 PathProgramCache]: Analyzing trace with hash -545590511, now seen corresponding path program 8 times [2024-11-14 03:10:49,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:10:49,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748770258] [2024-11-14 03:10:49,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:10:49,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:10:49,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:10:49,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [631998389] [2024-11-14 03:10:49,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:10:49,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:10:49,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:10:49,988 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:10:49,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-14 03:10:50,194 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 03:10:50,194 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:10:50,196 INFO L255 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-14 03:10:50,199 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:10:56,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 167 proven. 97 refuted. 0 times theorem prover too weak. 916 trivial. 0 not checked. [2024-11-14 03:10:56,238 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:10:58,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:10:58,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748770258] [2024-11-14 03:10:58,734 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:10:58,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631998389] [2024-11-14 03:10:58,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631998389] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:10:58,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [852787625] [2024-11-14 03:10:58,736 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-14 03:10:58,736 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:10:58,736 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:10:58,736 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:10:58,736 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:11:09,339 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-14 03:11:09,344 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 03:11:09,345 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:11:14,989 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '61088#(and (<= ~counter~0 10) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 03:11:14,989 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:11:14,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:11:14,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-11-14 03:11:14,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100244618] [2024-11-14 03:11:14,990 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 03:11:14,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-14 03:11:14,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:11:14,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-14 03:11:14,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1684, Unknown=0, NotChecked=0, Total=1892 [2024-11-14 03:11:14,991 INFO L87 Difference]: Start difference. First operand 1516 states and 2001 transitions. Second operand has 18 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2024-11-14 03:11:20,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:11:20,435 INFO L93 Difference]: Finished difference Result 1558 states and 2052 transitions. [2024-11-14 03:11:20,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-14 03:11:20,435 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 161 [2024-11-14 03:11:20,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:11:20,444 INFO L225 Difference]: With dead ends: 1558 [2024-11-14 03:11:20,444 INFO L226 Difference]: Without dead ends: 1556 [2024-11-14 03:11:20,445 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=256, Invalid=2096, Unknown=0, NotChecked=0, Total=2352 [2024-11-14 03:11:20,446 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 30 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:11:20,446 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 714 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2024-11-14 03:11:20,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2024-11-14 03:11:21,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1546. [2024-11-14 03:11:21,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1546 states, 996 states have (on average 1.21285140562249) internal successors, (1208), 1005 states have internal predecessors, (1208), 417 states have call successors, (417), 132 states have call predecessors, (417), 132 states have return successors, (414), 408 states have call predecessors, (414), 414 states have call successors, (414) [2024-11-14 03:11:21,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 2039 transitions. [2024-11-14 03:11:21,586 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 2039 transitions. Word has length 161 [2024-11-14 03:11:21,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:11:21,586 INFO L471 AbstractCegarLoop]: Abstraction has 1546 states and 2039 transitions. [2024-11-14 03:11:21,586 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2024-11-14 03:11:21,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 2039 transitions. [2024-11-14 03:11:21,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2024-11-14 03:11:21,589 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:11:21,590 INFO L215 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:11:21,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-14 03:11:21,790 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-14 03:11:21,790 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:11:21,791 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:11:21,791 INFO L85 PathProgramCache]: Analyzing trace with hash 221703633, now seen corresponding path program 9 times [2024-11-14 03:11:21,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:11:21,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857860178] [2024-11-14 03:11:21,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:11:21,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:11:21,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:11:21,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1605020277] [2024-11-14 03:11:21,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:11:21,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:11:21,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:11:21,833 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:11:21,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-14 03:11:22,004 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:11:22,004 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:11:22,007 INFO L255 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-14 03:11:22,015 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:11:24,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 111 proven. 114 refuted. 0 times theorem prover too weak. 955 trivial. 0 not checked. [2024-11-14 03:11:24,332 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:11:24,727 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:11:24,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857860178] [2024-11-14 03:11:24,727 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:11:24,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605020277] [2024-11-14 03:11:24,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605020277] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:11:24,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019657151] [2024-11-14 03:11:24,728 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-14 03:11:24,728 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:11:24,728 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:11:24,729 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:11:24,729 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:11:34,608 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-14 03:11:34,612 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 03:11:34,613 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:11:37,773 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '66481#(and (<= ~counter~0 10) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 03:11:37,773 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:11:37,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:11:37,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-11-14 03:11:37,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241941874] [2024-11-14 03:11:37,774 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 03:11:37,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-14 03:11:37,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:11:37,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-14 03:11:37,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2024-11-14 03:11:37,776 INFO L87 Difference]: Start difference. First operand 1546 states and 2039 transitions. Second operand has 19 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2024-11-14 03:11:41,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:11:41,663 INFO L93 Difference]: Finished difference Result 1594 states and 2107 transitions. [2024-11-14 03:11:41,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-14 03:11:41,664 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) Word has length 161 [2024-11-14 03:11:41,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:11:41,673 INFO L225 Difference]: With dead ends: 1594 [2024-11-14 03:11:41,673 INFO L226 Difference]: Without dead ends: 1590 [2024-11-14 03:11:41,675 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=230, Invalid=2220, Unknown=0, NotChecked=0, Total=2450 [2024-11-14 03:11:41,676 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 58 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:11:41,676 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 882 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-14 03:11:41,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1590 states. [2024-11-14 03:11:42,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1590 to 1575. [2024-11-14 03:11:42,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1011 states have (on average 1.2136498516320475) internal successors, (1227), 1019 states have internal predecessors, (1227), 429 states have call successors, (429), 135 states have call predecessors, (429), 134 states have return successors, (426), 420 states have call predecessors, (426), 426 states have call successors, (426) [2024-11-14 03:11:42,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 2082 transitions. [2024-11-14 03:11:42,705 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 2082 transitions. Word has length 161 [2024-11-14 03:11:42,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:11:42,706 INFO L471 AbstractCegarLoop]: Abstraction has 1575 states and 2082 transitions. [2024-11-14 03:11:42,706 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2024-11-14 03:11:42,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 2082 transitions. [2024-11-14 03:11:42,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2024-11-14 03:11:42,710 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:11:42,710 INFO L215 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:11:42,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-14 03:11:42,913 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:11:42,914 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:11:42,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:11:42,914 INFO L85 PathProgramCache]: Analyzing trace with hash 41516142, now seen corresponding path program 10 times [2024-11-14 03:11:42,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:11:42,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045637835] [2024-11-14 03:11:42,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:11:42,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:11:42,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:11:42,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1745490909] [2024-11-14 03:11:42,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:11:42,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:11:42,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:11:42,967 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:11:42,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-14 03:11:43,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:11:43,178 INFO L255 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-11-14 03:11:43,184 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:11:45,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 210 proven. 188 refuted. 0 times theorem prover too weak. 793 trivial. 0 not checked. [2024-11-14 03:11:45,879 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:11:46,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:11:46,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045637835] [2024-11-14 03:11:46,370 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:11:46,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745490909] [2024-11-14 03:11:46,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745490909] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:11:46,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [998218378] [2024-11-14 03:11:46,371 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2024-11-14 03:11:46,372 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:11:46,372 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:11:46,372 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:11:46,372 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:11:56,383 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-14 03:11:56,387 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 03:11:56,388 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:11:59,531 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '72006#(and (<= ~counter~0 10) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 03:11:59,531 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:11:59,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:11:59,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-11-14 03:11:59,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308485126] [2024-11-14 03:11:59,532 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 03:11:59,532 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-14 03:11:59,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:11:59,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-14 03:11:59,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1719, Unknown=0, NotChecked=0, Total=1892 [2024-11-14 03:11:59,533 INFO L87 Difference]: Start difference. First operand 1575 states and 2082 transitions. Second operand has 22 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 11 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 11 states have call predecessors, (27), 10 states have call successors, (27) [2024-11-14 03:12:03,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:03,204 INFO L93 Difference]: Finished difference Result 1636 states and 2160 transitions. [2024-11-14 03:12:03,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-14 03:12:03,205 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 11 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 11 states have call predecessors, (27), 10 states have call successors, (27) Word has length 165 [2024-11-14 03:12:03,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:03,212 INFO L225 Difference]: With dead ends: 1636 [2024-11-14 03:12:03,212 INFO L226 Difference]: Without dead ends: 1634 [2024-11-14 03:12:03,214 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 291 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=247, Invalid=2615, Unknown=0, NotChecked=0, Total=2862 [2024-11-14 03:12:03,214 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 67 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:03,214 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 664 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 915 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-14 03:12:03,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1634 states. [2024-11-14 03:12:04,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1634 to 1600. [2024-11-14 03:12:04,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1029 states have (on average 1.2108843537414966) internal successors, (1246), 1037 states have internal predecessors, (1246), 433 states have call successors, (433), 138 states have call predecessors, (433), 137 states have return successors, (430), 424 states have call predecessors, (430), 430 states have call successors, (430) [2024-11-14 03:12:04,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 2109 transitions. [2024-11-14 03:12:04,540 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 2109 transitions. Word has length 165 [2024-11-14 03:12:04,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:04,540 INFO L471 AbstractCegarLoop]: Abstraction has 1600 states and 2109 transitions. [2024-11-14 03:12:04,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 11 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 11 states have call predecessors, (27), 10 states have call successors, (27) [2024-11-14 03:12:04,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 2109 transitions. [2024-11-14 03:12:04,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2024-11-14 03:12:04,543 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:04,543 INFO L215 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:12:04,565 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-14 03:12:04,747 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:04,748 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:12:04,748 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:04,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1500632046, now seen corresponding path program 3 times [2024-11-14 03:12:04,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:04,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655343225] [2024-11-14 03:12:04,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:04,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:04,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:12:04,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [674390466] [2024-11-14 03:12:04,779 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:12:04,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:04,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:12:04,782 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:12:04,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-14 03:12:04,946 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:12:04,946 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:12:04,950 INFO L255 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-14 03:12:04,954 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:12:06,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1279 backedges. 113 proven. 122 refuted. 0 times theorem prover too weak. 1044 trivial. 0 not checked. [2024-11-14 03:12:06,721 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:12:13,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1279 backedges. 113 proven. 119 refuted. 0 times theorem prover too weak. 1047 trivial. 0 not checked. [2024-11-14 03:12:13,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:13,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655343225] [2024-11-14 03:12:13,377 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 03:12:13,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674390466] [2024-11-14 03:12:13,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674390466] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:12:13,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [925519252] [2024-11-14 03:12:13,378 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-14 03:12:13,378 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:12:13,378 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:12:13,378 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:12:13,378 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:12:23,265 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2024-11-14 03:12:23,268 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 7 for LOIs [2024-11-14 03:12:23,269 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:12:27,188 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '78135#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-14 03:12:27,189 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:12:27,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:12:27,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 34 [2024-11-14 03:12:27,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384982887] [2024-11-14 03:12:27,189 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 03:12:27,189 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-14 03:12:27,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:27,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-14 03:12:27,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=2233, Unknown=0, NotChecked=0, Total=2450 [2024-11-14 03:12:27,191 INFO L87 Difference]: Start difference. First operand 1600 states and 2109 transitions. Second operand has 34 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 20 states have call successors, (57), 3 states have call predecessors, (57), 3 states have return successors, (56), 18 states have call predecessors, (56), 18 states have call successors, (56) [2024-11-14 03:13:03,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 03:13:18,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 03:13:34,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 03:14:02,060 WARN L286 SmtUtils]: Spent 5.07s on a formula simplification. DAG size of input: 110 DAG size of output: 113 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 03:14:06,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:14:06,837 INFO L93 Difference]: Finished difference Result 1911 states and 2616 transitions. [2024-11-14 03:14:06,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2024-11-14 03:14:06,838 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 20 states have call successors, (57), 3 states have call predecessors, (57), 3 states have return successors, (56), 18 states have call predecessors, (56), 18 states have call successors, (56) Word has length 167 [2024-11-14 03:14:06,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:14:06,844 INFO L225 Difference]: With dead ends: 1911 [2024-11-14 03:14:06,844 INFO L226 Difference]: Without dead ends: 1901 [2024-11-14 03:14:06,846 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 451 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3510 ImplicationChecksByTransitivity, 69.1s TimeCoverageRelationStatistics Valid=1618, Invalid=12188, Unknown=0, NotChecked=0, Total=13806 [2024-11-14 03:14:06,846 INFO L432 NwaCegarLoop]: 144 mSDtfsCounter, 265 mSDsluCounter, 2316 mSDsCounter, 0 mSdLazyCounter, 2454 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 2460 SdHoareTripleChecker+Invalid, 2738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 2454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:14:06,847 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 2460 Invalid, 2738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 2454 Invalid, 0 Unknown, 0 Unchecked, 35.7s Time] [2024-11-14 03:14:06,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1901 states. [2024-11-14 03:14:08,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1901 to 1686. [2024-11-14 03:14:08,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1071 states have (on average 1.2166199813258636) internal successors, (1303), 1078 states have internal predecessors, (1303), 470 states have call successors, (470), 144 states have call predecessors, (470), 144 states have return successors, (468), 463 states have call predecessors, (468), 468 states have call successors, (468) [2024-11-14 03:14:08,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 2241 transitions. [2024-11-14 03:14:08,124 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 2241 transitions. Word has length 167 [2024-11-14 03:14:08,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:14:08,124 INFO L471 AbstractCegarLoop]: Abstraction has 1686 states and 2241 transitions. [2024-11-14 03:14:08,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 20 states have call successors, (57), 3 states have call predecessors, (57), 3 states have return successors, (56), 18 states have call predecessors, (56), 18 states have call successors, (56) [2024-11-14 03:14:08,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 2241 transitions. [2024-11-14 03:14:08,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2024-11-14 03:14:08,128 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:14:08,128 INFO L215 NwaCegarLoop]: trace histogram [25, 24, 24, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:14:08,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-14 03:14:08,332 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:08,333 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:14:08,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:14:08,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1342856588, now seen corresponding path program 2 times [2024-11-14 03:14:08,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:14:08,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292121057] [2024-11-14 03:14:08,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:14:08,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:14:08,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:14:08,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1331588145] [2024-11-14 03:14:08,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:14:08,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:08,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:14:08,374 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:14:08,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-14 03:14:09,396 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-14 03:14:09,396 INFO L228 tOrderPrioritization]: Conjunction of SSA is sat [2024-11-14 03:14:09,396 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-14 03:14:09,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-14 03:14:09,552 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2024-11-14 03:14:09,553 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-14 03:14:09,554 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-14 03:14:09,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-14 03:14:09,756 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:14:09,759 INFO L407 BasicCegarLoop]: Path program histogram: [10, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:14:09,831 INFO L173 ceAbstractionStarter]: Computing trace abstraction results [2024-11-14 03:14:09,836 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.11 03:14:09 BoogieIcfgContainer [2024-11-14 03:14:09,837 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-14 03:14:09,837 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-14 03:14:09,837 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-14 03:14:09,837 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-14 03:14:09,839 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:03:44" (3/4) ... [2024-11-14 03:14:09,840 INFO L136 WitnessPrinter]: Generating witness for reachability counterexample [2024-11-14 03:14:09,955 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/witness.graphml [2024-11-14 03:14:09,955 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-14 03:14:09,956 INFO L158 Benchmark]: Toolchain (without parser) took 626496.05ms. Allocated memory was 142.6MB in the beginning and 1.8GB in the end (delta: 1.7GB). Free memory was 109.6MB in the beginning and 748.0MB in the end (delta: -638.4MB). Peak memory consumption was 1.1GB. Max. memory is 16.1GB. [2024-11-14 03:14:09,957 INFO L158 Benchmark]: CDTParser took 0.40ms. Allocated memory is still 167.8MB. Free memory is still 104.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 03:14:09,957 INFO L158 Benchmark]: CACSL2BoogieTranslator took 366.05ms. Allocated memory is still 142.6MB. Free memory was 109.3MB in the beginning and 97.6MB in the end (delta: 11.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-14 03:14:09,958 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.86ms. Allocated memory is still 142.6MB. Free memory was 97.6MB in the beginning and 96.4MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 03:14:09,958 INFO L158 Benchmark]: Boogie Preprocessor took 37.34ms. Allocated memory is still 142.6MB. Free memory was 96.4MB in the beginning and 95.5MB in the end (delta: 841.8kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-14 03:14:09,958 INFO L158 Benchmark]: RCFGBuilder took 519.81ms. Allocated memory is still 142.6MB. Free memory was 95.5MB in the beginning and 82.5MB in the end (delta: 13.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-14 03:14:09,958 INFO L158 Benchmark]: TraceAbstraction took 625405.12ms. Allocated memory was 142.6MB in the beginning and 1.8GB in the end (delta: 1.7GB). Free memory was 81.9MB in the beginning and 756.4MB in the end (delta: -674.5MB). Peak memory consumption was 1.0GB. Max. memory is 16.1GB. [2024-11-14 03:14:09,959 INFO L158 Benchmark]: Witness Printer took 117.66ms. Allocated memory is still 1.8GB. Free memory was 756.4MB in the beginning and 748.0MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-14 03:14:09,963 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40ms. Allocated memory is still 167.8MB. Free memory is still 104.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 366.05ms. Allocated memory is still 142.6MB. Free memory was 109.3MB in the beginning and 97.6MB in the end (delta: 11.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.86ms. Allocated memory is still 142.6MB. Free memory was 97.6MB in the beginning and 96.4MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 37.34ms. Allocated memory is still 142.6MB. Free memory was 96.4MB in the beginning and 95.5MB in the end (delta: 841.8kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 519.81ms. Allocated memory is still 142.6MB. Free memory was 95.5MB in the beginning and 82.5MB in the end (delta: 13.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 625405.12ms. Allocated memory was 142.6MB in the beginning and 1.8GB in the end (delta: 1.7GB). Free memory was 81.9MB in the beginning and 756.4MB in the end (delta: -674.5MB). Peak memory consumption was 1.0GB. Max. memory is 16.1GB. * Witness Printer took 117.66ms. Allocated memory is still 1.8GB. Free memory was 756.4MB in the beginning and 748.0MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; [L20] int x, y; [L21] long long a, b, p, q, r, s, c, k, xy, yy; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) [L24] RET assume_abort_if_not(x >= 1) VAL [counter=0, x=5, y=8] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) [L25] RET assume_abort_if_not(y >= 1) VAL [counter=0, x=5, y=8] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 [L33] c = 0 [L34] k = 0 [L35] xy = (long long) x * y [L36] yy = (long long) y * y VAL [a=5, b=8, counter=0, p=1, q=0, r=0, s=1, x=5, xy=40, y=8, yy=64] [L37] CALL assume_abort_if_not(xy < 2147483647) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) [L37] RET assume_abort_if_not(xy < 2147483647) VAL [a=5, b=8, counter=0, p=1, q=0, r=0, s=1, x=5, xy=40, y=8, yy=64] [L38] CALL assume_abort_if_not(yy < 2147483647) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) [L38] RET assume_abort_if_not(yy < 2147483647) VAL [a=5, b=8, counter=0, p=1, q=0, r=0, s=1, x=5, xy=40, y=8, yy=64] [L40] EXPR counter++ VAL [a=5, b=8, counter=1, p=1, q=0, r=0, s=1, x=5, xy=40, y=8, yy=64] [L40] COND TRUE counter++<10 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 VAL [a=5, b=8, c=5, counter=1, k=0, p=1, q=0, r=0, s=1, x=5, xy=40, y=8, yy=64] [L46] EXPR counter++ VAL [a=5, b=8, c=5, counter=2, k=0, p=1, q=0, r=0, s=1, x=5, xy=40, y=8, yy=64] [L46] COND TRUE counter++<10 [L47] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=2] [L47] RET __VERIFIER_assert(a == k * b + c) VAL [a=5, b=8, c=5, counter=2, k=0, p=1, q=0, r=0, s=1, x=5, xy=40, y=8, yy=64] [L48] CALL __VERIFIER_assert(a == y*r + x*p) VAL [\old(cond)=1, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=2] [L48] RET __VERIFIER_assert(a == y*r + x*p) VAL [a=5, b=8, c=5, counter=2, k=0, p=1, q=0, r=0, s=1, x=5, xy=40, y=8, yy=64] [L49] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=2] [L49] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=5, b=8, c=5, counter=2, k=0, p=1, q=0, r=0, s=1, x=5, xy=40, y=8, yy=64] [L50] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(cond)=1, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=2] [L50] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [a=5, b=8, c=5, counter=2, k=0, p=1, q=0, r=0, s=1, x=5, xy=40, y=8, yy=64] [L51] COND TRUE !(c >= b) VAL [a=5, b=8, c=5, counter=2, k=0, p=1, q=0, r=0, s=1, x=5, xy=40, y=8, yy=64] [L57] a = b [L58] b = c [L60] long long temp; [L61] temp = p [L62] p = q [L63] q = temp - q * k [L64] temp = r [L65] r = s [L66] s = temp - s * k [L40] EXPR counter++ VAL [a=8, b=5, counter=3, p=0, q=1, r=1, s=0, x=5, xy=40, y=8, yy=64] [L40] COND TRUE counter++<10 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 VAL [a=8, b=5, c=8, counter=3, k=0, p=0, q=1, r=1, s=0, x=5, xy=40, y=8, yy=64] [L46] EXPR counter++ VAL [a=8, b=5, c=8, counter=4, k=0, p=0, q=1, r=1, s=0, x=5, xy=40, y=8, yy=64] [L46] COND TRUE counter++<10 [L47] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=4] [L47] RET __VERIFIER_assert(a == k * b + c) VAL [a=8, b=5, c=8, counter=4, k=0, p=0, q=1, r=1, s=0, x=5, xy=40, y=8, yy=64] [L48] CALL __VERIFIER_assert(a == y*r + x*p) VAL [\old(cond)=1, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=4] [L48] RET __VERIFIER_assert(a == y*r + x*p) VAL [a=8, b=5, c=8, counter=4, k=0, p=0, q=1, r=1, s=0, x=5, xy=40, y=8, yy=64] [L49] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=4] [L49] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=8, b=5, c=8, counter=4, k=0, p=0, q=1, r=1, s=0, x=5, xy=40, y=8, yy=64] [L50] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(cond)=1, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=4] [L50] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [a=8, b=5, c=8, counter=4, k=0, p=0, q=1, r=1, s=0, x=5, xy=40, y=8, yy=64] [L51] COND FALSE !(!(c >= b)) [L53] c = c - b [L54] k = k + 1 VAL [a=8, b=5, c=3, counter=4, k=1, p=0, q=1, r=1, s=0, x=5, xy=40, y=8, yy=64] [L46] EXPR counter++ VAL [a=8, b=5, c=3, counter=5, k=1, p=0, q=1, r=1, s=0, x=5, xy=40, y=8, yy=64] [L46] COND TRUE counter++<10 [L47] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=5] [L47] RET __VERIFIER_assert(a == k * b + c) VAL [a=8, b=5, c=3, counter=5, k=1, p=0, q=1, r=1, s=0, x=5, xy=40, y=8, yy=64] [L48] CALL __VERIFIER_assert(a == y*r + x*p) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=5] [L48] RET __VERIFIER_assert(a == y*r + x*p) VAL [a=8, b=5, c=3, counter=5, k=1, p=0, q=1, r=1, s=0, x=5, xy=40, y=8, yy=64] [L49] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=5] [L49] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=8, b=5, c=3, counter=5, k=1, p=0, q=1, r=1, s=0, x=5, xy=40, y=8, yy=64] [L50] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=5] [L50] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [a=8, b=5, c=3, counter=5, k=1, p=0, q=1, r=1, s=0, x=5, xy=40, y=8, yy=64] [L51] COND TRUE !(c >= b) VAL [a=8, b=5, c=3, counter=5, k=1, p=0, q=1, r=1, s=0, x=5, xy=40, y=8, yy=64] [L57] a = b [L58] b = c [L60] long long temp; [L61] temp = p [L62] p = q [L63] q = temp - q * k [L64] temp = r [L65] r = s [L66] s = temp - s * k [L40] EXPR counter++ VAL [a=5, b=3, counter=6, p=1, q=-1, r=0, s=1, x=5, xy=40, y=8, yy=64] [L40] COND TRUE counter++<10 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 VAL [a=5, b=3, c=5, counter=6, k=0, p=1, q=-1, r=0, s=1, x=5, xy=40, y=8, yy=64] [L46] EXPR counter++ VAL [a=5, b=3, c=5, counter=7, k=0, p=1, q=-1, r=0, s=1, x=5, xy=40, y=8, yy=64] [L46] COND TRUE counter++<10 [L47] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, counter=7] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=7] [L47] RET __VERIFIER_assert(a == k * b + c) VAL [a=5, b=3, c=5, counter=7, k=0, p=1, q=-1, r=0, s=1, x=5, xy=40, y=8, yy=64] [L48] CALL __VERIFIER_assert(a == y*r + x*p) VAL [\old(cond)=1, counter=7] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=7] [L48] RET __VERIFIER_assert(a == y*r + x*p) VAL [a=5, b=3, c=5, counter=7, k=0, p=1, q=-1, r=0, s=1, x=5, xy=40, y=8, yy=64] [L49] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=7] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=7] [L49] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=5, b=3, c=5, counter=7, k=0, p=1, q=-1, r=0, s=1, x=5, xy=40, y=8, yy=64] [L50] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(cond)=1, counter=7] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=7] [L50] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [a=5, b=3, c=5, counter=7, k=0, p=1, q=-1, r=0, s=1, x=5, xy=40, y=8, yy=64] [L51] COND FALSE !(!(c >= b)) [L53] c = c - b [L54] k = k + 1 VAL [a=5, b=3, c=2, counter=7, k=1, p=1, q=-1, r=0, s=1, x=5, xy=40, y=8, yy=64] [L46] EXPR counter++ VAL [a=5, b=3, c=2, counter=8, k=1, p=1, q=-1, r=0, s=1, x=5, xy=40, y=8, yy=64] [L46] COND TRUE counter++<10 [L47] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, counter=8] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=8] [L47] RET __VERIFIER_assert(a == k * b + c) VAL [a=5, b=3, c=2, counter=8, k=1, p=1, q=-1, r=0, s=1, x=5, xy=40, y=8, yy=64] [L48] CALL __VERIFIER_assert(a == y*r + x*p) VAL [\old(cond)=1, counter=8] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=8] [L48] RET __VERIFIER_assert(a == y*r + x*p) VAL [a=5, b=3, c=2, counter=8, k=1, p=1, q=-1, r=0, s=1, x=5, xy=40, y=8, yy=64] [L49] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=8] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=8] [L49] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=5, b=3, c=2, counter=8, k=1, p=1, q=-1, r=0, s=1, x=5, xy=40, y=8, yy=64] [L50] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(cond)=1, counter=8] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=8] [L50] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [a=5, b=3, c=2, counter=8, k=1, p=1, q=-1, r=0, s=1, x=5, xy=40, y=8, yy=64] [L51] COND TRUE !(c >= b) VAL [a=5, b=3, c=2, counter=8, k=1, p=1, q=-1, r=0, s=1, x=5, xy=40, y=8, yy=64] [L57] a = b [L58] b = c [L60] long long temp; [L61] temp = p [L62] p = q [L63] q = temp - q * k [L64] temp = r [L65] r = s [L66] s = temp - s * k [L40] EXPR counter++ VAL [a=3, b=2, counter=9, p=-1, q=2, r=1, s=-1, x=5, xy=40, y=8, yy=64] [L40] COND TRUE counter++<10 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 VAL [a=3, b=2, c=3, counter=9, k=0, p=-1, q=2, r=1, s=-1, x=5, xy=40, y=8, yy=64] [L46] EXPR counter++ VAL [a=3, b=2, c=3, counter=10, k=0, p=-1, q=2, r=1, s=-1, x=5, xy=40, y=8, yy=64] [L46] COND TRUE counter++<10 [L47] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, counter=10] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=10] [L47] RET __VERIFIER_assert(a == k * b + c) VAL [a=3, b=2, c=3, counter=10, k=0, p=-1, q=2, r=1, s=-1, x=5, xy=40, y=8, yy=64] [L48] CALL __VERIFIER_assert(a == y*r + x*p) VAL [\old(cond)=1, counter=10] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=10] [L48] RET __VERIFIER_assert(a == y*r + x*p) VAL [a=3, b=2, c=3, counter=10, k=0, p=-1, q=2, r=1, s=-1, x=5, xy=40, y=8, yy=64] [L49] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=10] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=10] [L49] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=3, b=2, c=3, counter=10, k=0, p=-1, q=2, r=1, s=-1, x=5, xy=40, y=8, yy=64] [L50] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [\old(cond)=1, counter=10] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=10] [L50] RET __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) VAL [a=3, b=2, c=3, counter=10, k=0, p=-1, q=2, r=1, s=-1, x=5, xy=40, y=8, yy=64] [L51] COND FALSE !(!(c >= b)) [L53] c = c - b [L54] k = k + 1 VAL [a=3, b=2, c=1, counter=10, k=1, p=-1, q=2, r=1, s=-1, x=5, xy=40, y=8, yy=64] [L46] EXPR counter++ VAL [a=3, b=2, c=1, counter=11, k=1, p=-1, q=2, r=1, s=-1, x=5, xy=40, y=8, yy=64] [L46] COND FALSE !(counter++<10) [L57] a = b [L58] b = c [L60] long long temp; [L61] temp = p [L62] p = q [L63] q = temp - q * k [L64] temp = r [L65] r = s [L66] s = temp - s * k [L40] EXPR counter++ VAL [a=2, b=1, counter=12, p=2, q=-3, r=-1, s=2, x=5, xy=40, y=8, yy=64] [L40] COND FALSE !(counter++<10) [L70] CALL __VERIFIER_assert(q*x + s*y == 0) VAL [\old(cond)=0, counter=12] [L11] COND TRUE !(cond) VAL [\old(cond)=0, counter=12] [L13] reach_error() VAL [\old(cond)=0, counter=12] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 625.2s, OverallIterations: 33, TraceHistogramMax: 25, PathProgramHistogramMax: 10, EmptinessCheckTime: 0.1s, AutomataDifference: 217.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 6 mSolverCounterUnknown, 2238 SdHoareTripleChecker+Valid, 86.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2060 mSDsluCounter, 13144 SdHoareTripleChecker+Invalid, 84.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 133 IncrementalHoareTripleChecker+Unchecked, 11620 mSDsCounter, 1437 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 11749 IncrementalHoareTripleChecker+Invalid, 13325 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1437 mSolverCounterUnsat, 1524 mSDtfsCounter, 11749 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 6729 GetRequests, 5539 SyntacticMatches, 59 SemanticMatches, 1131 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 17147 ImplicationChecksByTransitivity, 241.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1686occurred in iteration=32, InterpolantAutomatonStates: 542, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 12.8s AutomataMinimizationTime, 32 MinimizatonAttempts, 923 StatesRemovedByMinimization, 29 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 3.6s SatisfiabilityAnalysisTime, 104.2s InterpolantComputationTime, 5456 NumberOfCodeBlocks, 5283 NumberOfCodeBlocksAsserted, 85 NumberOfCheckSat, 4449 ConstructedInterpolants, 19 QuantifiedInterpolants, 35973 SizeOfPredicates, 101 NumberOfNonLiveVariables, 6173 ConjunctsInSsa, 932 ConjunctsInUnsatCore, 55 InterpolantComputations, 8 PerfectInterpolantSequences, 15801/18087 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 1.8s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 15, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 7, TOOLS_POST_TIME: 0.2s, TOOLS_POST_CALL_APPLICATIONS: 12, TOOLS_POST_CALL_TIME: 0.8s, TOOLS_POST_RETURN_APPLICATIONS: 8, TOOLS_POST_RETURN_TIME: 0.3s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 27, TOOLS_QUANTIFIERELIM_TIME: 1.2s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 34, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 15, DOMAIN_JOIN_TIME: 0.4s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 15, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 8, CALL_SUMMARIZER_CACHE_MISSES: 1, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 164, DAG_COMPRESSION_RETAINED_NODES: 40, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2024-11-14 03:14:10,135 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f6e4b65-21af-4477-aa78-faf2cf45a271/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE