./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_20-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_20-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1 --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e9f62e9366253d4fa7ecb8459a59d71535ca8498509abd809bca70a443281519 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-01 22:58:57,852 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-01 22:58:57,908 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-12-01 22:58:57,913 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-01 22:58:57,913 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-01 22:58:57,939 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-01 22:58:57,939 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-01 22:58:57,940 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-01 22:58:57,940 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-01 22:58:57,940 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-01 22:58:57,940 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-01 22:58:57,940 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-01 22:58:57,941 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-01 22:58:57,941 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-01 22:58:57,941 INFO L153 SettingsManager]: * Use SBE=true [2024-12-01 22:58:57,941 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-01 22:58:57,941 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-12-01 22:58:57,941 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-01 22:58:57,941 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-01 22:58:57,941 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-01 22:58:57,942 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-01 22:58:57,942 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-12-01 22:58:57,942 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-01 22:58:57,942 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-12-01 22:58:57,942 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-01 22:58:57,942 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-12-01 22:58:57,942 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-01 22:58:57,942 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-01 22:58:57,942 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-01 22:58:57,942 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-01 22:58:57,943 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-01 22:58:57,943 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-01 22:58:57,943 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-01 22:58:57,943 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-01 22:58:57,943 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-01 22:58:57,943 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-01 22:58:57,943 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-01 22:58:57,943 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-01 22:58:57,943 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-01 22:58:57,944 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-01 22:58:57,944 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-12-01 22:58:57,944 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-12-01 22:58:57,944 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-01 22:58:57,944 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-01 22:58:57,944 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-01 22:58:57,944 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-01 22:58:57,944 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-01 22:58:57,944 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-01 22:58:57,944 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1 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 -> Automizer 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 -> e9f62e9366253d4fa7ecb8459a59d71535ca8498509abd809bca70a443281519 [2024-12-01 22:58:58,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-01 22:58:58,225 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-01 22:58:58,227 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-01 22:58:58,229 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-01 22:58:58,229 INFO L274 PluginConnector]: CDTParser initialized [2024-12-01 22:58:58,230 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/recursive-simple/fibo_2calls_20-2.c [2024-12-01 22:59:00,881 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/data/256ee9af6/c6d776e479bb4587945b2aa8a917d62b/FLAGf9095b366 [2024-12-01 22:59:01,074 INFO L384 CDTParser]: Found 1 translation units. [2024-12-01 22:59:01,074 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/sv-benchmarks/c/recursive-simple/fibo_2calls_20-2.c [2024-12-01 22:59:01,081 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/data/256ee9af6/c6d776e479bb4587945b2aa8a917d62b/FLAGf9095b366 [2024-12-01 22:59:01,467 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/data/256ee9af6/c6d776e479bb4587945b2aa8a917d62b [2024-12-01 22:59:01,469 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-01 22:59:01,470 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-01 22:59:01,472 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-01 22:59:01,472 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-01 22:59:01,475 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-01 22:59:01,476 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 10:59:01" (1/1) ... [2024-12-01 22:59:01,476 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e91cbab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:59:01, skipping insertion in model container [2024-12-01 22:59:01,477 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 10:59:01" (1/1) ... [2024-12-01 22:59:01,488 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-01 22:59:01,607 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_5c31a9d0-744f-4b2d-b421-23392acc727a/sv-benchmarks/c/recursive-simple/fibo_2calls_20-2.c[951,964] [2024-12-01 22:59:01,610 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-01 22:59:01,617 INFO L200 MainTranslator]: Completed pre-run [2024-12-01 22:59:01,628 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_5c31a9d0-744f-4b2d-b421-23392acc727a/sv-benchmarks/c/recursive-simple/fibo_2calls_20-2.c[951,964] [2024-12-01 22:59:01,629 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-01 22:59:01,640 INFO L204 MainTranslator]: Completed translation [2024-12-01 22:59:01,640 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:59:01 WrapperNode [2024-12-01 22:59:01,641 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-01 22:59:01,642 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-01 22:59:01,642 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-01 22:59:01,642 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-01 22:59:01,648 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:59:01" (1/1) ... [2024-12-01 22:59:01,652 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:59:01" (1/1) ... [2024-12-01 22:59:01,664 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2024-12-01 22:59:01,665 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-01 22:59:01,665 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-01 22:59:01,666 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-01 22:59:01,666 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-01 22:59:01,673 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:59:01" (1/1) ... [2024-12-01 22:59:01,673 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:59:01" (1/1) ... [2024-12-01 22:59:01,674 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:59:01" (1/1) ... [2024-12-01 22:59:01,685 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-12-01 22:59:01,685 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:59:01" (1/1) ... [2024-12-01 22:59:01,685 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:59:01" (1/1) ... [2024-12-01 22:59:01,688 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:59:01" (1/1) ... [2024-12-01 22:59:01,689 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:59:01" (1/1) ... [2024-12-01 22:59:01,691 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:59:01" (1/1) ... [2024-12-01 22:59:01,692 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:59:01" (1/1) ... [2024-12-01 22:59:01,692 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:59:01" (1/1) ... [2024-12-01 22:59:01,694 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-01 22:59:01,695 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-01 22:59:01,695 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-01 22:59:01,695 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-01 22:59:01,696 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:59:01" (1/1) ... [2024-12-01 22:59:01,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-01 22:59:01,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 22:59:01,722 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-01 22:59:01,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-01 22:59:01,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-01 22:59:01,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-01 22:59:01,748 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2024-12-01 22:59:01,748 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2024-12-01 22:59:01,748 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2024-12-01 22:59:01,748 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2024-12-01 22:59:01,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-01 22:59:01,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-01 22:59:01,802 INFO L234 CfgBuilder]: Building ICFG [2024-12-01 22:59:01,804 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-01 22:59:01,936 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-12-01 22:59:01,936 INFO L283 CfgBuilder]: Performing block encoding [2024-12-01 22:59:01,947 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-01 22:59:01,948 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2024-12-01 22:59:01,948 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 10:59:01 BoogieIcfgContainer [2024-12-01 22:59:01,948 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-01 22:59:01,951 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-01 22:59:01,951 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-01 22:59:01,956 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-01 22:59:01,956 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 10:59:01" (1/3) ... [2024-12-01 22:59:01,957 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17d9f12b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 10:59:01, skipping insertion in model container [2024-12-01 22:59:01,957 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 10:59:01" (2/3) ... [2024-12-01 22:59:01,958 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17d9f12b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 10:59:01, skipping insertion in model container [2024-12-01 22:59:01,958 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 10:59:01" (3/3) ... [2024-12-01 22:59:01,959 INFO L128 eAbstractionObserver]: Analyzing ICFG fibo_2calls_20-2.c [2024-12-01 22:59:01,974 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-01 22:59:01,976 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fibo_2calls_20-2.c that has 3 procedures, 29 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2024-12-01 22:59:02,028 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-01 22:59:02,037 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=PETRI_NET, 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;@7e1e2276, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-01 22:59:02,037 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-12-01 22:59:02,040 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-12-01 22:59:02,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-12-01 22:59:02,046 INFO L210 NwaCegarLoop]: Found error trace [2024-12-01 22:59:02,047 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 22:59:02,047 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-01 22:59:02,050 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 22:59:02,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1123300790, now seen corresponding path program 1 times [2024-12-01 22:59:02,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 22:59:02,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203865535] [2024-12-01 22:59:02,058 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 22:59:02,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 22:59:02,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 22:59:02,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-01 22:59:02,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 22:59:02,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203865535] [2024-12-01 22:59:02,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203865535] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-01 22:59:02,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-01 22:59:02,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-01 22:59:02,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174106263] [2024-12-01 22:59:02,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-01 22:59:02,228 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-01 22:59:02,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 22:59:02,244 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-01 22:59:02,245 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-01 22:59:02,246 INFO L87 Difference]: Start difference. First operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-12-01 22:59:02,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-01 22:59:02,324 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2024-12-01 22:59:02,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-01 22:59:02,326 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-12-01 22:59:02,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-01 22:59:02,331 INFO L225 Difference]: With dead ends: 41 [2024-12-01 22:59:02,331 INFO L226 Difference]: Without dead ends: 29 [2024-12-01 22:59:02,333 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-01 22:59:02,336 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 10 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-01 22:59:02,337 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 97 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-01 22:59:02,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-12-01 22:59:02,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2024-12-01 22:59:02,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-12-01 22:59:02,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2024-12-01 22:59:02,364 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2024-12-01 22:59:02,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-01 22:59:02,364 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2024-12-01 22:59:02,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-12-01 22:59:02,364 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-12-01 22:59:02,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-12-01 22:59:02,365 INFO L210 NwaCegarLoop]: Found error trace [2024-12-01 22:59:02,366 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 22:59:02,366 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-01 22:59:02,366 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-01 22:59:02,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 22:59:02,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1177745932, now seen corresponding path program 1 times [2024-12-01 22:59:02,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 22:59:02,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745704511] [2024-12-01 22:59:02,367 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 22:59:02,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 22:59:02,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 22:59:02,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-01 22:59:02,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 22:59:02,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745704511] [2024-12-01 22:59:02,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745704511] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-01 22:59:02,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-01 22:59:02,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-01 22:59:02,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735585984] [2024-12-01 22:59:02,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-01 22:59:02,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-01 22:59:02,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 22:59:02,439 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-01 22:59:02,439 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-01 22:59:02,439 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-12-01 22:59:02,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-01 22:59:02,499 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2024-12-01 22:59:02,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-01 22:59:02,499 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-12-01 22:59:02,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-01 22:59:02,500 INFO L225 Difference]: With dead ends: 33 [2024-12-01 22:59:02,500 INFO L226 Difference]: Without dead ends: 29 [2024-12-01 22:59:02,501 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-01 22:59:02,501 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 7 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-01 22:59:02,502 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 80 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-01 22:59:02,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-12-01 22:59:02,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2024-12-01 22:59:02,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-12-01 22:59:02,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2024-12-01 22:59:02,510 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2024-12-01 22:59:02,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-01 22:59:02,510 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2024-12-01 22:59:02,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-12-01 22:59:02,511 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-12-01 22:59:02,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-12-01 22:59:02,512 INFO L210 NwaCegarLoop]: Found error trace [2024-12-01 22:59:02,512 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 22:59:02,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-01 22:59:02,512 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-01 22:59:02,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 22:59:02,513 INFO L85 PathProgramCache]: Analyzing trace with hash 2110588723, now seen corresponding path program 1 times [2024-12-01 22:59:02,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 22:59:02,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741753763] [2024-12-01 22:59:02,513 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 22:59:02,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 22:59:02,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 22:59:02,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-01 22:59:02,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 22:59:02,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741753763] [2024-12-01 22:59:02,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741753763] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 22:59:02,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14703796] [2024-12-01 22:59:02,640 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 22:59:02,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 22:59:02,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 22:59:02,642 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 22:59:02,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-01 22:59:02,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 22:59:02,704 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-12-01 22:59:02,708 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 22:59:02,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-01 22:59:02,792 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 22:59:03,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-01 22:59:03,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14703796] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 22:59:03,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 22:59:03,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2024-12-01 22:59:03,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776013627] [2024-12-01 22:59:03,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 22:59:03,006 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-12-01 22:59:03,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 22:59:03,007 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-12-01 22:59:03,007 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-12-01 22:59:03,008 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2024-12-01 22:59:03,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-01 22:59:03,143 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2024-12-01 22:59:03,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-01 22:59:03,144 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 23 [2024-12-01 22:59:03,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-01 22:59:03,145 INFO L225 Difference]: With dead ends: 55 [2024-12-01 22:59:03,145 INFO L226 Difference]: Without dead ends: 31 [2024-12-01 22:59:03,145 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-12-01 22:59:03,146 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 23 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-01 22:59:03,146 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 118 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-01 22:59:03,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-12-01 22:59:03,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2024-12-01 22:59:03,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-12-01 22:59:03,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2024-12-01 22:59:03,153 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2024-12-01 22:59:03,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-01 22:59:03,154 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2024-12-01 22:59:03,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2024-12-01 22:59:03,154 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2024-12-01 22:59:03,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-12-01 22:59:03,155 INFO L210 NwaCegarLoop]: Found error trace [2024-12-01 22:59:03,156 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 22:59:03,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-01 22:59:03,356 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-12-01 22:59:03,356 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-01 22:59:03,357 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 22:59:03,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1277869167, now seen corresponding path program 1 times [2024-12-01 22:59:03,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 22:59:03,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923043622] [2024-12-01 22:59:03,357 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 22:59:03,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 22:59:03,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 22:59:03,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-01 22:59:03,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 22:59:03,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923043622] [2024-12-01 22:59:03,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923043622] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 22:59:03,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869208882] [2024-12-01 22:59:03,444 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 22:59:03,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 22:59:03,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 22:59:03,445 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 22:59:03,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-01 22:59:03,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 22:59:03,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-12-01 22:59:03,482 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 22:59:03,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-01 22:59:03,511 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 22:59:03,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-01 22:59:03,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869208882] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 22:59:03,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 22:59:03,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2024-12-01 22:59:03,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772215123] [2024-12-01 22:59:03,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 22:59:03,691 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-12-01 22:59:03,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 22:59:03,691 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-12-01 22:59:03,691 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-12-01 22:59:03,692 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2024-12-01 22:59:03,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-01 22:59:03,825 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2024-12-01 22:59:03,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-01 22:59:03,826 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 24 [2024-12-01 22:59:03,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-01 22:59:03,827 INFO L225 Difference]: With dead ends: 40 [2024-12-01 22:59:03,827 INFO L226 Difference]: Without dead ends: 36 [2024-12-01 22:59:03,827 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-12-01 22:59:03,828 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 16 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-01 22:59:03,829 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 123 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-01 22:59:03,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-12-01 22:59:03,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2024-12-01 22:59:03,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2024-12-01 22:59:03,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2024-12-01 22:59:03,837 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 24 [2024-12-01 22:59:03,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-01 22:59:03,837 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2024-12-01 22:59:03,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2024-12-01 22:59:03,837 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2024-12-01 22:59:03,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-12-01 22:59:03,838 INFO L210 NwaCegarLoop]: Found error trace [2024-12-01 22:59:03,838 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 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] [2024-12-01 22:59:03,845 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-01 22:59:04,039 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 22:59:04,039 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-01 22:59:04,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 22:59:04,040 INFO L85 PathProgramCache]: Analyzing trace with hash -2061621832, now seen corresponding path program 1 times [2024-12-01 22:59:04,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 22:59:04,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579611307] [2024-12-01 22:59:04,040 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 22:59:04,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 22:59:04,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 22:59:04,113 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-01 22:59:04,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 22:59:04,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579611307] [2024-12-01 22:59:04,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579611307] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 22:59:04,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63095579] [2024-12-01 22:59:04,113 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 22:59:04,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 22:59:04,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 22:59:04,115 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 22:59:04,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-01 22:59:04,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 22:59:04,157 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-01 22:59:04,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 22:59:04,226 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-12-01 22:59:04,226 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 22:59:04,550 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-01 22:59:04,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63095579] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 22:59:04,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 22:59:04,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 14 [2024-12-01 22:59:04,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665636274] [2024-12-01 22:59:04,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 22:59:04,551 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-12-01 22:59:04,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 22:59:04,552 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-12-01 22:59:04,552 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-12-01 22:59:04,552 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2024-12-01 22:59:04,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-01 22:59:04,687 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2024-12-01 22:59:04,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-01 22:59:04,687 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) Word has length 36 [2024-12-01 22:59:04,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-01 22:59:04,688 INFO L225 Difference]: With dead ends: 69 [2024-12-01 22:59:04,689 INFO L226 Difference]: Without dead ends: 38 [2024-12-01 22:59:04,689 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-12-01 22:59:04,690 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-01 22:59:04,690 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 146 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-01 22:59:04,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-12-01 22:59:04,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2024-12-01 22:59:04,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.173913043478261) internal successors, (27), 26 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2024-12-01 22:59:04,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2024-12-01 22:59:04,698 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 36 [2024-12-01 22:59:04,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-01 22:59:04,698 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2024-12-01 22:59:04,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 4.090909090909091) internal successors, (45), 14 states have internal predecessors, (45), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2024-12-01 22:59:04,698 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2024-12-01 22:59:04,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-12-01 22:59:04,699 INFO L210 NwaCegarLoop]: Found error trace [2024-12-01 22:59:04,699 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 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] [2024-12-01 22:59:04,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-01 22:59:04,900 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 22:59:04,900 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-01 22:59:04,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 22:59:04,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1167294498, now seen corresponding path program 1 times [2024-12-01 22:59:04,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 22:59:04,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859277201] [2024-12-01 22:59:04,901 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 22:59:04,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 22:59:04,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 22:59:05,031 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-12-01 22:59:05,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 22:59:05,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859277201] [2024-12-01 22:59:05,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859277201] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 22:59:05,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751204073] [2024-12-01 22:59:05,032 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 22:59:05,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 22:59:05,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 22:59:05,033 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 22:59:05,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-01 22:59:05,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 22:59:05,072 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-01 22:59:05,073 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 22:59:05,169 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-01 22:59:05,169 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 22:59:05,490 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-01 22:59:05,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751204073] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 22:59:05,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 22:59:05,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 18 [2024-12-01 22:59:05,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695109591] [2024-12-01 22:59:05,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 22:59:05,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-12-01 22:59:05,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 22:59:05,491 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-12-01 22:59:05,492 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2024-12-01 22:59:05,492 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2024-12-01 22:59:05,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-01 22:59:05,854 INFO L93 Difference]: Finished difference Result 101 states and 161 transitions. [2024-12-01 22:59:05,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-12-01 22:59:05,855 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) Word has length 37 [2024-12-01 22:59:05,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-01 22:59:05,857 INFO L225 Difference]: With dead ends: 101 [2024-12-01 22:59:05,857 INFO L226 Difference]: Without dead ends: 68 [2024-12-01 22:59:05,858 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2024-12-01 22:59:05,859 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 34 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-01 22:59:05,859 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 303 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-01 22:59:05,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-12-01 22:59:05,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2024-12-01 22:59:05,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 39 states have internal predecessors, (41), 11 states have call successors, (11), 3 states have call predecessors, (11), 9 states have return successors, (34), 13 states have call predecessors, (34), 11 states have call successors, (34) [2024-12-01 22:59:05,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 86 transitions. [2024-12-01 22:59:05,872 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 86 transitions. Word has length 37 [2024-12-01 22:59:05,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-01 22:59:05,873 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 86 transitions. [2024-12-01 22:59:05,873 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2024-12-01 22:59:05,873 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 86 transitions. [2024-12-01 22:59:05,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-12-01 22:59:05,875 INFO L210 NwaCegarLoop]: Found error trace [2024-12-01 22:59:05,875 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2024-12-01 22:59:05,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-01 22:59:06,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 22:59:06,076 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-01 22:59:06,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 22:59:06,076 INFO L85 PathProgramCache]: Analyzing trace with hash 384535367, now seen corresponding path program 1 times [2024-12-01 22:59:06,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 22:59:06,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366974365] [2024-12-01 22:59:06,077 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 22:59:06,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 22:59:06,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 22:59:06,185 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-12-01 22:59:06,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 22:59:06,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366974365] [2024-12-01 22:59:06,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366974365] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 22:59:06,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080138167] [2024-12-01 22:59:06,186 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 22:59:06,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 22:59:06,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 22:59:06,187 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 22:59:06,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-01 22:59:06,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 22:59:06,247 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-12-01 22:59:06,249 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 22:59:06,331 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-12-01 22:59:06,331 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 22:59:06,792 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-12-01 22:59:06,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080138167] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 22:59:06,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 22:59:06,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 17 [2024-12-01 22:59:06,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487943817] [2024-12-01 22:59:06,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 22:59:06,793 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-12-01 22:59:06,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 22:59:06,794 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-12-01 22:59:06,794 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2024-12-01 22:59:06,794 INFO L87 Difference]: Start difference. First operand 56 states and 86 transitions. Second operand has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) [2024-12-01 22:59:06,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-01 22:59:06,955 INFO L93 Difference]: Finished difference Result 102 states and 193 transitions. [2024-12-01 22:59:06,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-01 22:59:06,955 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) Word has length 51 [2024-12-01 22:59:06,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-01 22:59:06,957 INFO L225 Difference]: With dead ends: 102 [2024-12-01 22:59:06,958 INFO L226 Difference]: Without dead ends: 98 [2024-12-01 22:59:06,958 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2024-12-01 22:59:06,959 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 33 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-01 22:59:06,959 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 164 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-01 22:59:06,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-12-01 22:59:06,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2024-12-01 22:59:06,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 40 states have (on average 1.15) internal successors, (46), 44 states have internal predecessors, (46), 12 states have call successors, (12), 3 states have call predecessors, (12), 11 states have return successors, (48), 16 states have call predecessors, (48), 12 states have call successors, (48) [2024-12-01 22:59:06,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 106 transitions. [2024-12-01 22:59:06,985 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 106 transitions. Word has length 51 [2024-12-01 22:59:06,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-01 22:59:06,985 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 106 transitions. [2024-12-01 22:59:06,986 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 17 states have internal predecessors, (55), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) [2024-12-01 22:59:06,986 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 106 transitions. [2024-12-01 22:59:06,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-12-01 22:59:06,989 INFO L210 NwaCegarLoop]: Found error trace [2024-12-01 22:59:06,989 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 22:59:06,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-01 22:59:07,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 22:59:07,190 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-01 22:59:07,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 22:59:07,191 INFO L85 PathProgramCache]: Analyzing trace with hash -586612948, now seen corresponding path program 1 times [2024-12-01 22:59:07,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 22:59:07,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724977916] [2024-12-01 22:59:07,191 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 22:59:07,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 22:59:07,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 22:59:07,359 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 40 proven. 59 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2024-12-01 22:59:07,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 22:59:07,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724977916] [2024-12-01 22:59:07,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724977916] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 22:59:07,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931651844] [2024-12-01 22:59:07,360 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 22:59:07,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 22:59:07,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 22:59:07,361 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 22:59:07,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-01 22:59:07,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 22:59:07,430 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-12-01 22:59:07,432 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 22:59:07,564 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 13 proven. 92 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2024-12-01 22:59:07,564 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 22:59:08,308 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 13 proven. 102 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-12-01 22:59:08,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931651844] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 22:59:08,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 22:59:08,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 23 [2024-12-01 22:59:08,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874653248] [2024-12-01 22:59:08,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 22:59:08,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-12-01 22:59:08,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 22:59:08,310 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-12-01 22:59:08,310 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2024-12-01 22:59:08,310 INFO L87 Difference]: Start difference. First operand 64 states and 106 transitions. Second operand has 23 states, 21 states have (on average 3.619047619047619) internal successors, (76), 23 states have internal predecessors, (76), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 10 states have call predecessors, (27), 18 states have call successors, (27) [2024-12-01 22:59:08,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-01 22:59:08,854 INFO L93 Difference]: Finished difference Result 177 states and 369 transitions. [2024-12-01 22:59:08,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-12-01 22:59:08,855 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.619047619047619) internal successors, (76), 23 states have internal predecessors, (76), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 10 states have call predecessors, (27), 18 states have call successors, (27) Word has length 93 [2024-12-01 22:59:08,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-01 22:59:08,857 INFO L225 Difference]: With dead ends: 177 [2024-12-01 22:59:08,857 INFO L226 Difference]: Without dead ends: 104 [2024-12-01 22:59:08,859 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 169 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2024-12-01 22:59:08,859 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 96 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-01 22:59:08,859 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 325 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-01 22:59:08,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-12-01 22:59:08,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2024-12-01 22:59:08,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 64 states have internal predecessors, (73), 16 states have call successors, (16), 8 states have call predecessors, (16), 14 states have return successors, (43), 20 states have call predecessors, (43), 16 states have call successors, (43) [2024-12-01 22:59:08,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 132 transitions. [2024-12-01 22:59:08,877 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 132 transitions. Word has length 93 [2024-12-01 22:59:08,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-01 22:59:08,878 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 132 transitions. [2024-12-01 22:59:08,878 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.619047619047619) internal successors, (76), 23 states have internal predecessors, (76), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 10 states have call predecessors, (27), 18 states have call successors, (27) [2024-12-01 22:59:08,878 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 132 transitions. [2024-12-01 22:59:08,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-12-01 22:59:08,880 INFO L210 NwaCegarLoop]: Found error trace [2024-12-01 22:59:08,881 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 10, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 22:59:08,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-01 22:59:09,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 22:59:09,081 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-01 22:59:09,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 22:59:09,082 INFO L85 PathProgramCache]: Analyzing trace with hash 437944761, now seen corresponding path program 2 times [2024-12-01 22:59:09,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 22:59:09,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163159661] [2024-12-01 22:59:09,082 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-01 22:59:09,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 22:59:09,109 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-01 22:59:09,109 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 22:59:09,338 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 43 proven. 179 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2024-12-01 22:59:09,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 22:59:09,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163159661] [2024-12-01 22:59:09,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163159661] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 22:59:09,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141132914] [2024-12-01 22:59:09,338 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-01 22:59:09,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 22:59:09,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 22:59:09,340 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 22:59:09,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-01 22:59:09,442 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-01 22:59:09,443 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 22:59:09,444 INFO L256 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-12-01 22:59:09,447 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 22:59:09,579 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 30 proven. 244 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2024-12-01 22:59:09,579 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 22:59:10,658 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 30 proven. 260 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2024-12-01 22:59:10,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141132914] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 22:59:10,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 22:59:10,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 15] total 23 [2024-12-01 22:59:10,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723631056] [2024-12-01 22:59:10,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 22:59:10,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-12-01 22:59:10,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 22:59:10,660 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-12-01 22:59:10,661 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2024-12-01 22:59:10,661 INFO L87 Difference]: Start difference. First operand 93 states and 132 transitions. Second operand has 23 states, 21 states have (on average 3.619047619047619) internal successors, (76), 23 states have internal predecessors, (76), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) [2024-12-01 22:59:10,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-01 22:59:10,899 INFO L93 Difference]: Finished difference Result 132 states and 227 transitions. [2024-12-01 22:59:10,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-12-01 22:59:10,900 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.619047619047619) internal successors, (76), 23 states have internal predecessors, (76), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) Word has length 159 [2024-12-01 22:59:10,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-01 22:59:10,902 INFO L225 Difference]: With dead ends: 132 [2024-12-01 22:59:10,902 INFO L226 Difference]: Without dead ends: 128 [2024-12-01 22:59:10,902 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 302 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=801, Unknown=0, NotChecked=0, Total=992 [2024-12-01 22:59:10,903 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 70 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-01 22:59:10,903 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 196 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-01 22:59:10,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-12-01 22:59:10,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 118. [2024-12-01 22:59:10,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 77 states have (on average 1.1428571428571428) internal successors, (88), 79 states have internal predecessors, (88), 21 states have call successors, (21), 8 states have call predecessors, (21), 19 states have return successors, (85), 30 states have call predecessors, (85), 21 states have call successors, (85) [2024-12-01 22:59:10,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 194 transitions. [2024-12-01 22:59:10,933 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 194 transitions. Word has length 159 [2024-12-01 22:59:10,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-01 22:59:10,933 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 194 transitions. [2024-12-01 22:59:10,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.619047619047619) internal successors, (76), 23 states have internal predecessors, (76), 18 states have call successors, (22), 1 states have call predecessors, (22), 12 states have return successors, (30), 12 states have call predecessors, (30), 18 states have call successors, (30) [2024-12-01 22:59:10,934 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 194 transitions. [2024-12-01 22:59:10,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2024-12-01 22:59:10,939 INFO L210 NwaCegarLoop]: Found error trace [2024-12-01 22:59:10,939 INFO L218 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 18, 16, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 8, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 22:59:10,946 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-12-01 22:59:11,139 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 22:59:11,140 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-01 22:59:11,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 22:59:11,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1279109938, now seen corresponding path program 2 times [2024-12-01 22:59:11,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 22:59:11,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368720419] [2024-12-01 22:59:11,141 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-01 22:59:11,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 22:59:11,188 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-01 22:59:11,188 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 22:59:11,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 158 proven. 490 refuted. 0 times theorem prover too weak. 1585 trivial. 0 not checked. [2024-12-01 22:59:11,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 22:59:11,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368720419] [2024-12-01 22:59:11,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368720419] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 22:59:11,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363138585] [2024-12-01 22:59:11,627 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-01 22:59:11,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 22:59:11,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 22:59:11,629 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 22:59:11,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-01 22:59:11,784 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-01 22:59:11,784 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 22:59:11,786 INFO L256 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-12-01 22:59:11,792 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 22:59:11,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 87 proven. 569 refuted. 0 times theorem prover too weak. 1577 trivial. 0 not checked. [2024-12-01 22:59:11,977 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 22:59:13,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 87 proven. 593 refuted. 0 times theorem prover too weak. 1553 trivial. 0 not checked. [2024-12-01 22:59:13,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363138585] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 22:59:13,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 22:59:13,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 17] total 29 [2024-12-01 22:59:13,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547914749] [2024-12-01 22:59:13,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 22:59:13,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-12-01 22:59:13,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 22:59:13,808 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-12-01 22:59:13,808 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2024-12-01 22:59:13,808 INFO L87 Difference]: Start difference. First operand 118 states and 194 transitions. Second operand has 29 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 29 states have internal predecessors, (95), 24 states have call successors, (30), 1 states have call predecessors, (30), 12 states have return successors, (37), 13 states have call predecessors, (37), 24 states have call successors, (37) [2024-12-01 22:59:14,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-01 22:59:14,573 INFO L93 Difference]: Finished difference Result 323 states and 666 transitions. [2024-12-01 22:59:14,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-12-01 22:59:14,574 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 29 states have internal predecessors, (95), 24 states have call successors, (30), 1 states have call predecessors, (30), 12 states have return successors, (37), 13 states have call predecessors, (37), 24 states have call successors, (37) Word has length 284 [2024-12-01 22:59:14,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-01 22:59:14,577 INFO L225 Difference]: With dead ends: 323 [2024-12-01 22:59:14,577 INFO L226 Difference]: Without dead ends: 214 [2024-12-01 22:59:14,579 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 606 GetRequests, 547 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=449, Invalid=2413, Unknown=0, NotChecked=0, Total=2862 [2024-12-01 22:59:14,579 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 158 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-12-01 22:59:14,579 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 449 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-12-01 22:59:14,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2024-12-01 22:59:14,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 184. [2024-12-01 22:59:14,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 123 states have (on average 1.1869918699186992) internal successors, (146), 123 states have internal predecessors, (146), 35 states have call successors, (35), 17 states have call predecessors, (35), 25 states have return successors, (120), 43 states have call predecessors, (120), 35 states have call successors, (120) [2024-12-01 22:59:14,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 301 transitions. [2024-12-01 22:59:14,600 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 301 transitions. Word has length 284 [2024-12-01 22:59:14,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-01 22:59:14,600 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 301 transitions. [2024-12-01 22:59:14,600 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 29 states have internal predecessors, (95), 24 states have call successors, (30), 1 states have call predecessors, (30), 12 states have return successors, (37), 13 states have call predecessors, (37), 24 states have call successors, (37) [2024-12-01 22:59:14,600 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 301 transitions. [2024-12-01 22:59:14,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2024-12-01 22:59:14,608 INFO L210 NwaCegarLoop]: Found error trace [2024-12-01 22:59:14,608 INFO L218 NwaCegarLoop]: trace histogram [32, 32, 25, 25, 24, 19, 16, 16, 16, 16, 16, 16, 16, 12, 12, 12, 12, 12, 12, 12, 12, 8, 6, 3, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 22:59:14,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-12-01 22:59:14,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-12-01 22:59:14,809 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-01 22:59:14,809 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 22:59:14,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1695767594, now seen corresponding path program 3 times [2024-12-01 22:59:14,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 22:59:14,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802536074] [2024-12-01 22:59:14,810 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-01 22:59:14,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 22:59:14,828 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-12-01 22:59:14,828 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 22:59:14,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4375 backedges. 515 proven. 4 refuted. 0 times theorem prover too weak. 3856 trivial. 0 not checked. [2024-12-01 22:59:14,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 22:59:14,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802536074] [2024-12-01 22:59:14,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802536074] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 22:59:14,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254601830] [2024-12-01 22:59:14,924 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-01 22:59:14,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 22:59:14,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 22:59:14,926 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 22:59:14,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-12-01 22:59:15,075 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-12-01 22:59:15,075 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 22:59:15,076 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-01 22:59:15,083 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 22:59:15,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4375 backedges. 760 proven. 6 refuted. 0 times theorem prover too weak. 3609 trivial. 0 not checked. [2024-12-01 22:59:15,161 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 22:59:16,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4375 backedges. 619 proven. 12 refuted. 0 times theorem prover too weak. 3744 trivial. 0 not checked. [2024-12-01 22:59:16,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254601830] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 22:59:16,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 22:59:16,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-12-01 22:59:16,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682063433] [2024-12-01 22:59:16,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 22:59:16,165 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-12-01 22:59:16,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 22:59:16,166 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-12-01 22:59:16,166 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2024-12-01 22:59:16,166 INFO L87 Difference]: Start difference. First operand 184 states and 301 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 7 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (17), 5 states have call predecessors, (17), 7 states have call successors, (17) [2024-12-01 22:59:16,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-01 22:59:16,313 INFO L93 Difference]: Finished difference Result 360 states and 621 transitions. [2024-12-01 22:59:16,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-01 22:59:16,315 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 7 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (17), 5 states have call predecessors, (17), 7 states have call successors, (17) Word has length 389 [2024-12-01 22:59:16,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-01 22:59:16,317 INFO L225 Difference]: With dead ends: 360 [2024-12-01 22:59:16,317 INFO L226 Difference]: Without dead ends: 181 [2024-12-01 22:59:16,318 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 789 GetRequests, 767 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2024-12-01 22:59:16,319 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 30 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-01 22:59:16,319 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 152 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-01 22:59:16,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-12-01 22:59:16,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 174. [2024-12-01 22:59:16,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 118 states have (on average 1.1694915254237288) internal successors, (138), 116 states have internal predecessors, (138), 33 states have call successors, (33), 18 states have call predecessors, (33), 22 states have return successors, (95), 39 states have call predecessors, (95), 33 states have call successors, (95) [2024-12-01 22:59:16,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 266 transitions. [2024-12-01 22:59:16,332 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 266 transitions. Word has length 389 [2024-12-01 22:59:16,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-01 22:59:16,332 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 266 transitions. [2024-12-01 22:59:16,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 7 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (17), 5 states have call predecessors, (17), 7 states have call successors, (17) [2024-12-01 22:59:16,333 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 266 transitions. [2024-12-01 22:59:16,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2024-12-01 22:59:16,335 INFO L210 NwaCegarLoop]: Found error trace [2024-12-01 22:59:16,335 INFO L218 NwaCegarLoop]: trace histogram [38, 38, 29, 29, 28, 27, 19, 19, 19, 19, 19, 19, 19, 14, 14, 14, 14, 14, 14, 14, 14, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 22:59:16,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-12-01 22:59:16,535 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-12-01 22:59:16,535 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-01 22:59:16,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 22:59:16,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1299493047, now seen corresponding path program 4 times [2024-12-01 22:59:16,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 22:59:16,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080445686] [2024-12-01 22:59:16,536 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-01 22:59:16,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 22:59:16,574 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-01 22:59:16,574 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 22:59:16,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6213 backedges. 196 proven. 801 refuted. 0 times theorem prover too weak. 5216 trivial. 0 not checked. [2024-12-01 22:59:16,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 22:59:16,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080445686] [2024-12-01 22:59:16,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080445686] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 22:59:16,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933910516] [2024-12-01 22:59:16,863 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-01 22:59:16,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 22:59:16,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 22:59:16,865 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 22:59:16,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-12-01 22:59:17,046 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-01 22:59:17,047 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 22:59:17,049 INFO L256 TraceCheckSpWp]: Trace formula consists of 818 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-12-01 22:59:17,055 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 22:59:17,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6213 backedges. 1477 proven. 19 refuted. 0 times theorem prover too weak. 4717 trivial. 0 not checked. [2024-12-01 22:59:17,114 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 22:59:18,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6213 backedges. 196 proven. 927 refuted. 0 times theorem prover too weak. 5090 trivial. 0 not checked. [2024-12-01 22:59:18,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933910516] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 22:59:18,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 22:59:18,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 17 [2024-12-01 22:59:18,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424539982] [2024-12-01 22:59:18,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 22:59:18,443 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-12-01 22:59:18,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 22:59:18,443 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-12-01 22:59:18,443 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-12-01 22:59:18,444 INFO L87 Difference]: Start difference. First operand 174 states and 266 transitions. Second operand has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 10 states have call successors, (20), 2 states have call predecessors, (20), 6 states have return successors, (23), 6 states have call predecessors, (23), 10 states have call successors, (23) [2024-12-01 22:59:18,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-01 22:59:18,635 INFO L93 Difference]: Finished difference Result 327 states and 532 transitions. [2024-12-01 22:59:18,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-01 22:59:18,636 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 10 states have call successors, (20), 2 states have call predecessors, (20), 6 states have return successors, (23), 6 states have call predecessors, (23), 10 states have call successors, (23) Word has length 461 [2024-12-01 22:59:18,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-01 22:59:18,638 INFO L225 Difference]: With dead ends: 327 [2024-12-01 22:59:18,638 INFO L226 Difference]: Without dead ends: 139 [2024-12-01 22:59:18,639 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 937 GetRequests, 911 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2024-12-01 22:59:18,639 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 21 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-01 22:59:18,640 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 211 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-01 22:59:18,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-12-01 22:59:18,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2024-12-01 22:59:18,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 96 states have (on average 1.1666666666666667) internal successors, (112), 95 states have internal predecessors, (112), 24 states have call successors, (24), 16 states have call predecessors, (24), 18 states have return successors, (67), 27 states have call predecessors, (67), 24 states have call successors, (67) [2024-12-01 22:59:18,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 203 transitions. [2024-12-01 22:59:18,652 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 203 transitions. Word has length 461 [2024-12-01 22:59:18,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-01 22:59:18,652 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 203 transitions. [2024-12-01 22:59:18,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 10 states have call successors, (20), 2 states have call predecessors, (20), 6 states have return successors, (23), 6 states have call predecessors, (23), 10 states have call successors, (23) [2024-12-01 22:59:18,653 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 203 transitions. [2024-12-01 22:59:18,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2024-12-01 22:59:18,655 INFO L210 NwaCegarLoop]: Found error trace [2024-12-01 22:59:18,655 INFO L218 NwaCegarLoop]: trace histogram [32, 32, 27, 27, 24, 24, 16, 16, 16, 16, 16, 16, 16, 13, 13, 13, 13, 13, 13, 13, 11, 8, 8, 3, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 22:59:18,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-12-01 22:59:18,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-12-01 22:59:18,856 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-01 22:59:18,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 22:59:18,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1298209125, now seen corresponding path program 5 times [2024-12-01 22:59:18,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 22:59:18,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019644540] [2024-12-01 22:59:18,856 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-01 22:59:18,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 22:59:18,871 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-12-01 22:59:18,872 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 22:59:18,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 261 proven. 727 refuted. 0 times theorem prover too weak. 3744 trivial. 0 not checked. [2024-12-01 22:59:18,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 22:59:18,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019644540] [2024-12-01 22:59:18,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019644540] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 22:59:18,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724572957] [2024-12-01 22:59:18,968 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-01 22:59:18,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 22:59:18,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 22:59:18,970 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 22:59:18,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-12-01 22:59:19,110 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-12-01 22:59:19,110 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 22:59:19,111 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-12-01 22:59:19,115 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 22:59:19,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 1710 proven. 31 refuted. 0 times theorem prover too weak. 2991 trivial. 0 not checked. [2024-12-01 22:59:19,157 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 22:59:20,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 261 proven. 727 refuted. 0 times theorem prover too weak. 3744 trivial. 0 not checked. [2024-12-01 22:59:20,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724572957] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 22:59:20,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 22:59:20,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 15 [2024-12-01 22:59:20,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747152763] [2024-12-01 22:59:20,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 22:59:20,360 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-12-01 22:59:20,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 22:59:20,361 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-12-01 22:59:20,361 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2024-12-01 22:59:20,361 INFO L87 Difference]: Start difference. First operand 139 states and 203 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 8 states have call successors, (22), 2 states have call predecessors, (22), 6 states have return successors, (25), 10 states have call predecessors, (25), 8 states have call successors, (25) [2024-12-01 22:59:20,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-01 22:59:20,584 INFO L93 Difference]: Finished difference Result 283 states and 449 transitions. [2024-12-01 22:59:20,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-12-01 22:59:20,585 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 8 states have call successors, (22), 2 states have call predecessors, (22), 6 states have return successors, (25), 10 states have call predecessors, (25), 8 states have call successors, (25) Word has length 406 [2024-12-01 22:59:20,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-01 22:59:20,586 INFO L225 Difference]: With dead ends: 283 [2024-12-01 22:59:20,586 INFO L226 Difference]: Without dead ends: 146 [2024-12-01 22:59:20,587 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 831 GetRequests, 803 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2024-12-01 22:59:20,588 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 36 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-01 22:59:20,588 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 164 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-01 22:59:20,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-12-01 22:59:20,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 139. [2024-12-01 22:59:20,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 96 states have (on average 1.15625) internal successors, (111), 95 states have internal predecessors, (111), 24 states have call successors, (24), 16 states have call predecessors, (24), 18 states have return successors, (74), 27 states have call predecessors, (74), 24 states have call successors, (74) [2024-12-01 22:59:20,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 209 transitions. [2024-12-01 22:59:20,597 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 209 transitions. Word has length 406 [2024-12-01 22:59:20,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-01 22:59:20,598 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 209 transitions. [2024-12-01 22:59:20,598 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 8 states have call successors, (22), 2 states have call predecessors, (22), 6 states have return successors, (25), 10 states have call predecessors, (25), 8 states have call successors, (25) [2024-12-01 22:59:20,598 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 209 transitions. [2024-12-01 22:59:20,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2024-12-01 22:59:20,600 INFO L210 NwaCegarLoop]: Found error trace [2024-12-01 22:59:20,600 INFO L218 NwaCegarLoop]: trace histogram [38, 38, 33, 33, 29, 28, 19, 19, 19, 19, 19, 19, 19, 16, 16, 16, 16, 16, 16, 16, 12, 10, 10, 4, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 22:59:20,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-12-01 22:59:20,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-12-01 22:59:20,800 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-01 22:59:20,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 22:59:20,801 INFO L85 PathProgramCache]: Analyzing trace with hash -821151567, now seen corresponding path program 6 times [2024-12-01 22:59:20,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 22:59:20,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363441672] [2024-12-01 22:59:20,801 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-01 22:59:20,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 22:59:20,861 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-12-01 22:59:20,861 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 22:59:21,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6872 backedges. 258 proven. 808 refuted. 0 times theorem prover too weak. 5806 trivial. 0 not checked. [2024-12-01 22:59:21,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 22:59:21,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363441672] [2024-12-01 22:59:21,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363441672] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 22:59:21,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113528512] [2024-12-01 22:59:21,074 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-01 22:59:21,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 22:59:21,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 22:59:21,077 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 22:59:21,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-12-01 22:59:21,283 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-12-01 22:59:21,284 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 22:59:21,286 INFO L256 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-12-01 22:59:21,292 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 22:59:21,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6872 backedges. 258 proven. 808 refuted. 0 times theorem prover too weak. 5806 trivial. 0 not checked. [2024-12-01 22:59:21,354 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 22:59:23,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6872 backedges. 260 proven. 822 refuted. 0 times theorem prover too weak. 5790 trivial. 0 not checked. [2024-12-01 22:59:23,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113528512] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 22:59:23,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 22:59:23,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 15] total 18 [2024-12-01 22:59:23,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687810812] [2024-12-01 22:59:23,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 22:59:23,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-12-01 22:59:23,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 22:59:23,034 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-12-01 22:59:23,034 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2024-12-01 22:59:23,035 INFO L87 Difference]: Start difference. First operand 139 states and 209 transitions. Second operand has 18 states, 16 states have (on average 4.0) internal successors, (64), 18 states have internal predecessors, (64), 14 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 9 states have call predecessors, (22), 14 states have call successors, (22) [2024-12-01 22:59:23,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-01 22:59:23,176 INFO L93 Difference]: Finished difference Result 164 states and 262 transitions. [2024-12-01 22:59:23,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-01 22:59:23,177 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 4.0) internal successors, (64), 18 states have internal predecessors, (64), 14 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 9 states have call predecessors, (22), 14 states have call successors, (22) Word has length 487 [2024-12-01 22:59:23,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-01 22:59:23,178 INFO L225 Difference]: With dead ends: 164 [2024-12-01 22:59:23,178 INFO L226 Difference]: Without dead ends: 160 [2024-12-01 22:59:23,179 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 992 GetRequests, 965 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2024-12-01 22:59:23,179 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 42 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-01 22:59:23,179 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 144 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-01 22:59:23,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-12-01 22:59:23,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 152. [2024-12-01 22:59:23,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 104 states have (on average 1.1442307692307692) internal successors, (119), 103 states have internal predecessors, (119), 26 states have call successors, (26), 16 states have call predecessors, (26), 21 states have return successors, (95), 32 states have call predecessors, (95), 26 states have call successors, (95) [2024-12-01 22:59:23,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 240 transitions. [2024-12-01 22:59:23,190 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 240 transitions. Word has length 487 [2024-12-01 22:59:23,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-01 22:59:23,191 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 240 transitions. [2024-12-01 22:59:23,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 4.0) internal successors, (64), 18 states have internal predecessors, (64), 14 states have call successors, (19), 1 states have call predecessors, (19), 7 states have return successors, (22), 9 states have call predecessors, (22), 14 states have call successors, (22) [2024-12-01 22:59:23,191 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 240 transitions. [2024-12-01 22:59:23,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2024-12-01 22:59:23,193 INFO L210 NwaCegarLoop]: Found error trace [2024-12-01 22:59:23,193 INFO L218 NwaCegarLoop]: trace histogram [36, 36, 33, 33, 29, 28, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 12, 11, 8, 4, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 22:59:23,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-12-01 22:59:23,394 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-12-01 22:59:23,394 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-01 22:59:23,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 22:59:23,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1909726294, now seen corresponding path program 7 times [2024-12-01 22:59:23,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 22:59:23,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374839775] [2024-12-01 22:59:23,395 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-01 22:59:23,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 22:59:23,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 22:59:23,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6508 backedges. 226 proven. 810 refuted. 0 times theorem prover too weak. 5472 trivial. 0 not checked. [2024-12-01 22:59:23,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 22:59:23,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374839775] [2024-12-01 22:59:23,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374839775] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 22:59:23,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419878127] [2024-12-01 22:59:23,770 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-01 22:59:23,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 22:59:23,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 22:59:23,772 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 22:59:23,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-12-01 22:59:24,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 22:59:24,025 INFO L256 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-12-01 22:59:24,030 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 22:59:24,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6508 backedges. 172 proven. 1187 refuted. 0 times theorem prover too weak. 5149 trivial. 0 not checked. [2024-12-01 22:59:24,161 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 22:59:26,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6508 backedges. 172 proven. 1220 refuted. 0 times theorem prover too weak. 5116 trivial. 0 not checked. [2024-12-01 22:59:26,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419878127] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 22:59:26,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 22:59:26,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 19] total 26 [2024-12-01 22:59:26,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845686740] [2024-12-01 22:59:26,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 22:59:26,664 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-12-01 22:59:26,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 22:59:26,665 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-12-01 22:59:26,665 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2024-12-01 22:59:26,665 INFO L87 Difference]: Start difference. First operand 152 states and 240 transitions. Second operand has 26 states, 24 states have (on average 3.625) internal successors, (87), 26 states have internal predecessors, (87), 22 states have call successors, (26), 1 states have call predecessors, (26), 13 states have return successors, (36), 14 states have call predecessors, (36), 22 states have call successors, (36) [2024-12-01 22:59:26,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-01 22:59:26,958 INFO L93 Difference]: Finished difference Result 191 states and 356 transitions. [2024-12-01 22:59:26,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-12-01 22:59:26,959 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 3.625) internal successors, (87), 26 states have internal predecessors, (87), 22 states have call successors, (26), 1 states have call predecessors, (26), 13 states have return successors, (36), 14 states have call predecessors, (36), 22 states have call successors, (36) Word has length 475 [2024-12-01 22:59:26,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-01 22:59:26,964 INFO L225 Difference]: With dead ends: 191 [2024-12-01 22:59:26,964 INFO L226 Difference]: Without dead ends: 187 [2024-12-01 22:59:26,965 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 974 GetRequests, 931 SyntacticMatches, 8 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=252, Invalid=1080, Unknown=0, NotChecked=0, Total=1332 [2024-12-01 22:59:26,965 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 53 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-01 22:59:26,965 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 214 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-01 22:59:26,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2024-12-01 22:59:26,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 174. [2024-12-01 22:59:26,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 117 states have (on average 1.1282051282051282) internal successors, (132), 116 states have internal predecessors, (132), 31 states have call successors, (31), 16 states have call predecessors, (31), 25 states have return successors, (141), 41 states have call predecessors, (141), 31 states have call successors, (141) [2024-12-01 22:59:26,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 304 transitions. [2024-12-01 22:59:26,984 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 304 transitions. Word has length 475 [2024-12-01 22:59:26,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-01 22:59:26,985 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 304 transitions. [2024-12-01 22:59:26,985 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 3.625) internal successors, (87), 26 states have internal predecessors, (87), 22 states have call successors, (26), 1 states have call predecessors, (26), 13 states have return successors, (36), 14 states have call predecessors, (36), 22 states have call successors, (36) [2024-12-01 22:59:26,985 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 304 transitions. [2024-12-01 22:59:26,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 874 [2024-12-01 22:59:26,990 INFO L210 NwaCegarLoop]: Found error trace [2024-12-01 22:59:26,990 INFO L218 NwaCegarLoop]: trace histogram [70, 70, 57, 57, 54, 53, 35, 35, 35, 35, 35, 35, 35, 28, 28, 28, 28, 28, 28, 28, 26, 18, 16, 4, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 22:59:27,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-12-01 22:59:27,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-12-01 22:59:27,191 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-01 22:59:27,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 22:59:27,192 INFO L85 PathProgramCache]: Analyzing trace with hash 2098293967, now seen corresponding path program 8 times [2024-12-01 22:59:27,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 22:59:27,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423378164] [2024-12-01 22:59:27,192 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-01 22:59:27,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 22:59:27,329 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-01 22:59:27,329 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 22:59:28,642 INFO L134 CoverageAnalysis]: Checked inductivity of 22745 backedges. 485 proven. 1823 refuted. 0 times theorem prover too weak. 20437 trivial. 0 not checked. [2024-12-01 22:59:28,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 22:59:28,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423378164] [2024-12-01 22:59:28,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423378164] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 22:59:28,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818527364] [2024-12-01 22:59:28,643 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-01 22:59:28,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 22:59:28,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 22:59:28,645 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 22:59:28,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-12-01 22:59:29,019 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-01 22:59:29,019 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 22:59:29,023 INFO L256 TraceCheckSpWp]: Trace formula consists of 1956 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-12-01 22:59:29,030 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 22:59:29,142 INFO L134 CoverageAnalysis]: Checked inductivity of 22745 backedges. 359 proven. 2601 refuted. 0 times theorem prover too weak. 19785 trivial. 0 not checked. [2024-12-01 22:59:29,142 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 22:59:33,113 INFO L134 CoverageAnalysis]: Checked inductivity of 22745 backedges. 359 proven. 2645 refuted. 0 times theorem prover too weak. 19741 trivial. 0 not checked. [2024-12-01 22:59:33,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818527364] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 22:59:33,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 22:59:33,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 21] total 28 [2024-12-01 22:59:33,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869990323] [2024-12-01 22:59:33,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 22:59:33,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-12-01 22:59:33,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 22:59:33,117 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-12-01 22:59:33,117 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2024-12-01 22:59:33,117 INFO L87 Difference]: Start difference. First operand 174 states and 304 transitions. Second operand has 28 states, 26 states have (on average 3.576923076923077) internal successors, (93), 28 states have internal predecessors, (93), 24 states have call successors, (28), 1 states have call predecessors, (28), 14 states have return successors, (39), 15 states have call predecessors, (39), 24 states have call successors, (39) [2024-12-01 22:59:33,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-01 22:59:33,427 INFO L93 Difference]: Finished difference Result 227 states and 506 transitions. [2024-12-01 22:59:33,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-12-01 22:59:33,427 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 3.576923076923077) internal successors, (93), 28 states have internal predecessors, (93), 24 states have call successors, (28), 1 states have call predecessors, (28), 14 states have return successors, (39), 15 states have call predecessors, (39), 24 states have call successors, (39) Word has length 873 [2024-12-01 22:59:33,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-01 22:59:33,431 INFO L225 Difference]: With dead ends: 227 [2024-12-01 22:59:33,431 INFO L226 Difference]: Without dead ends: 223 [2024-12-01 22:59:33,431 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1773 GetRequests, 1726 SyntacticMatches, 9 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=292, Invalid=1268, Unknown=0, NotChecked=0, Total=1560 [2024-12-01 22:59:33,432 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 127 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-01 22:59:33,432 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 224 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-01 22:59:33,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-12-01 22:59:33,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 167. [2024-12-01 22:59:33,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 113 states have (on average 1.1327433628318584) internal successors, (128), 112 states have internal predecessors, (128), 29 states have call successors, (29), 16 states have call predecessors, (29), 24 states have return successors, (127), 38 states have call predecessors, (127), 29 states have call successors, (127) [2024-12-01 22:59:33,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 284 transitions. [2024-12-01 22:59:33,461 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 284 transitions. Word has length 873 [2024-12-01 22:59:33,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-01 22:59:33,462 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 284 transitions. [2024-12-01 22:59:33,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 3.576923076923077) internal successors, (93), 28 states have internal predecessors, (93), 24 states have call successors, (28), 1 states have call predecessors, (28), 14 states have return successors, (39), 15 states have call predecessors, (39), 24 states have call successors, (39) [2024-12-01 22:59:33,463 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 284 transitions. [2024-12-01 22:59:33,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1496 [2024-12-01 22:59:33,481 INFO L210 NwaCegarLoop]: Found error trace [2024-12-01 22:59:33,481 INFO L218 NwaCegarLoop]: trace histogram [114, 114, 105, 105, 91, 86, 57, 57, 57, 57, 57, 57, 57, 52, 52, 52, 52, 52, 52, 52, 34, 34, 28, 14, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 22:59:33,492 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-12-01 22:59:33,682 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-12-01 22:59:33,682 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-01 22:59:33,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 22:59:33,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1549587885, now seen corresponding path program 9 times [2024-12-01 22:59:33,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 22:59:33,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744645452] [2024-12-01 22:59:33,683 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-01 22:59:33,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 22:59:33,735 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-12-01 22:59:33,735 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 22:59:33,923 INFO L134 CoverageAnalysis]: Checked inductivity of 67042 backedges. 3331 proven. 25 refuted. 0 times theorem prover too weak. 63686 trivial. 0 not checked. [2024-12-01 22:59:33,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 22:59:33,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744645452] [2024-12-01 22:59:33,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744645452] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 22:59:33,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658825173] [2024-12-01 22:59:33,923 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-01 22:59:33,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 22:59:33,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 22:59:33,925 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 22:59:33,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-12-01 22:59:34,169 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-12-01 22:59:34,169 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 22:59:34,171 INFO L256 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-12-01 22:59:34,181 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 22:59:34,316 INFO L134 CoverageAnalysis]: Checked inductivity of 67042 backedges. 3795 proven. 33 refuted. 0 times theorem prover too weak. 63214 trivial. 0 not checked. [2024-12-01 22:59:34,316 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 22:59:37,923 INFO L134 CoverageAnalysis]: Checked inductivity of 67042 backedges. 3795 proven. 35 refuted. 0 times theorem prover too weak. 63212 trivial. 0 not checked. [2024-12-01 22:59:37,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658825173] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 22:59:37,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 22:59:37,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 13] total 25 [2024-12-01 22:59:37,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833448238] [2024-12-01 22:59:37,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 22:59:37,925 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-12-01 22:59:37,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 22:59:37,926 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-12-01 22:59:37,926 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2024-12-01 22:59:37,926 INFO L87 Difference]: Start difference. First operand 167 states and 284 transitions. Second operand has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 12 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (23), 10 states have call predecessors, (23), 12 states have call successors, (23) [2024-12-01 22:59:38,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-01 22:59:38,278 INFO L93 Difference]: Finished difference Result 336 states and 666 transitions. [2024-12-01 22:59:38,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-12-01 22:59:38,278 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 12 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (23), 10 states have call predecessors, (23), 12 states have call successors, (23) Word has length 1495 [2024-12-01 22:59:38,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-01 22:59:38,280 INFO L225 Difference]: With dead ends: 336 [2024-12-01 22:59:38,280 INFO L226 Difference]: Without dead ends: 176 [2024-12-01 22:59:38,281 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3015 GetRequests, 2974 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=1122, Unknown=0, NotChecked=0, Total=1332 [2024-12-01 22:59:38,282 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 43 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-01 22:59:38,282 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 289 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-01 22:59:38,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2024-12-01 22:59:38,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 173. [2024-12-01 22:59:38,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 119 states have (on average 1.1008403361344539) internal successors, (131), 115 states have internal predecessors, (131), 29 states have call successors, (29), 19 states have call predecessors, (29), 24 states have return successors, (121), 38 states have call predecessors, (121), 29 states have call successors, (121) [2024-12-01 22:59:38,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 281 transitions. [2024-12-01 22:59:38,302 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 281 transitions. Word has length 1495 [2024-12-01 22:59:38,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-01 22:59:38,302 INFO L471 AbstractCegarLoop]: Abstraction has 173 states and 281 transitions. [2024-12-01 22:59:38,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 12 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (23), 10 states have call predecessors, (23), 12 states have call successors, (23) [2024-12-01 22:59:38,302 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 281 transitions. [2024-12-01 22:59:38,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1289 [2024-12-01 22:59:38,316 INFO L210 NwaCegarLoop]: Found error trace [2024-12-01 22:59:38,317 INFO L218 NwaCegarLoop]: trace histogram [97, 97, 92, 92, 77, 73, 48, 48, 48, 48, 48, 48, 48, 46, 46, 46, 46, 46, 46, 46, 31, 25, 20, 19, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 22:59:38,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-12-01 22:59:38,517 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-12-01 22:59:38,517 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-01 22:59:38,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 22:59:38,518 INFO L85 PathProgramCache]: Analyzing trace with hash 649651838, now seen corresponding path program 10 times [2024-12-01 22:59:38,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 22:59:38,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197296078] [2024-12-01 22:59:38,518 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-01 22:59:38,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 22:59:38,751 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-01 22:59:38,751 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 22:59:40,407 INFO L134 CoverageAnalysis]: Checked inductivity of 49574 backedges. 1042 proven. 4693 refuted. 0 times theorem prover too weak. 43839 trivial. 0 not checked. [2024-12-01 22:59:40,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 22:59:40,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197296078] [2024-12-01 22:59:40,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197296078] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 22:59:40,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768496090] [2024-12-01 22:59:40,408 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-01 22:59:40,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 22:59:40,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 22:59:40,410 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 22:59:40,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-12-01 22:59:40,763 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-01 22:59:40,764 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 22:59:40,769 INFO L256 TraceCheckSpWp]: Trace formula consists of 2289 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-12-01 22:59:40,797 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 22:59:40,924 INFO L134 CoverageAnalysis]: Checked inductivity of 49574 backedges. 14624 proven. 409 refuted. 0 times theorem prover too weak. 34541 trivial. 0 not checked. [2024-12-01 22:59:40,924 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 22:59:46,105 INFO L134 CoverageAnalysis]: Checked inductivity of 49574 backedges. 925 proven. 5424 refuted. 0 times theorem prover too weak. 43225 trivial. 0 not checked. [2024-12-01 22:59:46,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768496090] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 22:59:46,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 22:59:46,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 23] total 32 [2024-12-01 22:59:46,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396229848] [2024-12-01 22:59:46,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 22:59:46,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-12-01 22:59:46,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 22:59:46,107 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-12-01 22:59:46,107 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2024-12-01 22:59:46,107 INFO L87 Difference]: Start difference. First operand 173 states and 281 transitions. Second operand has 32 states, 32 states have (on average 3.625) internal successors, (116), 32 states have internal predecessors, (116), 26 states have call successors, (36), 2 states have call predecessors, (36), 13 states have return successors, (45), 14 states have call predecessors, (45), 26 states have call successors, (45) [2024-12-01 22:59:46,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-01 22:59:46,869 INFO L93 Difference]: Finished difference Result 376 states and 706 transitions. [2024-12-01 22:59:46,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-12-01 22:59:46,870 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.625) internal successors, (116), 32 states have internal predecessors, (116), 26 states have call successors, (36), 2 states have call predecessors, (36), 13 states have return successors, (45), 14 states have call predecessors, (45), 26 states have call successors, (45) Word has length 1288 [2024-12-01 22:59:46,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-01 22:59:46,872 INFO L225 Difference]: With dead ends: 376 [2024-12-01 22:59:46,872 INFO L226 Difference]: Without dead ends: 202 [2024-12-01 22:59:46,874 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2628 GetRequests, 2556 SyntacticMatches, 11 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=590, Invalid=3316, Unknown=0, NotChecked=0, Total=3906 [2024-12-01 22:59:46,874 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 122 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-12-01 22:59:46,874 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 462 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-12-01 22:59:46,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2024-12-01 22:59:46,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 179. [2024-12-01 22:59:46,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 124 states have (on average 1.0725806451612903) internal successors, (133), 120 states have internal predecessors, (133), 32 states have call successors, (32), 22 states have call predecessors, (32), 22 states have return successors, (104), 36 states have call predecessors, (104), 32 states have call successors, (104) [2024-12-01 22:59:46,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 269 transitions. [2024-12-01 22:59:46,888 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 269 transitions. Word has length 1288 [2024-12-01 22:59:46,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-01 22:59:46,888 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 269 transitions. [2024-12-01 22:59:46,888 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.625) internal successors, (116), 32 states have internal predecessors, (116), 26 states have call successors, (36), 2 states have call predecessors, (36), 13 states have return successors, (45), 14 states have call predecessors, (45), 26 states have call successors, (45) [2024-12-01 22:59:46,888 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 269 transitions. [2024-12-01 22:59:46,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1360 [2024-12-01 22:59:46,896 INFO L210 NwaCegarLoop]: Found error trace [2024-12-01 22:59:46,897 INFO L218 NwaCegarLoop]: trace histogram [101, 101, 98, 98, 81, 80, 50, 50, 50, 50, 50, 50, 50, 49, 49, 49, 49, 49, 49, 49, 32, 30, 20, 18, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 22:59:46,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-12-01 22:59:47,097 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-12-01 22:59:47,097 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-01 22:59:47,098 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 22:59:47,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1919276721, now seen corresponding path program 11 times [2024-12-01 22:59:47,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 22:59:47,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828076428] [2024-12-01 22:59:47,098 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-01 22:59:47,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 22:59:47,299 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2024-12-01 22:59:47,299 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 22:59:48,721 INFO L134 CoverageAnalysis]: Checked inductivity of 55216 backedges. 1236 proven. 4831 refuted. 0 times theorem prover too weak. 49149 trivial. 0 not checked. [2024-12-01 22:59:48,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 22:59:48,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828076428] [2024-12-01 22:59:48,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828076428] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 22:59:48,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302271572] [2024-12-01 22:59:48,721 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-01 22:59:48,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 22:59:48,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 22:59:48,723 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 22:59:48,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-12-01 22:59:49,486 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2024-12-01 22:59:49,486 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 22:59:49,492 INFO L256 TraceCheckSpWp]: Trace formula consists of 2421 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-12-01 22:59:49,500 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 22:59:49,611 INFO L134 CoverageAnalysis]: Checked inductivity of 55216 backedges. 22223 proven. 568 refuted. 0 times theorem prover too weak. 32425 trivial. 0 not checked. [2024-12-01 22:59:49,611 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 22:59:54,926 INFO L134 CoverageAnalysis]: Checked inductivity of 55216 backedges. 1280 proven. 5150 refuted. 0 times theorem prover too weak. 48786 trivial. 0 not checked. [2024-12-01 22:59:54,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302271572] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 22:59:54,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 22:59:54,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 23] total 30 [2024-12-01 22:59:54,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815995073] [2024-12-01 22:59:54,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 22:59:54,928 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-12-01 22:59:54,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 22:59:54,928 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-12-01 22:59:54,929 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2024-12-01 22:59:54,929 INFO L87 Difference]: Start difference. First operand 179 states and 269 transitions. Second operand has 30 states, 30 states have (on average 3.7666666666666666) internal successors, (113), 30 states have internal predecessors, (113), 22 states have call successors, (35), 2 states have call predecessors, (35), 12 states have return successors, (42), 15 states have call predecessors, (42), 22 states have call successors, (42) [2024-12-01 22:59:55,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-01 22:59:55,551 INFO L93 Difference]: Finished difference Result 436 states and 764 transitions. [2024-12-01 22:59:55,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-12-01 22:59:55,552 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.7666666666666666) internal successors, (113), 30 states have internal predecessors, (113), 22 states have call successors, (35), 2 states have call predecessors, (35), 12 states have return successors, (42), 15 states have call predecessors, (42), 22 states have call successors, (42) Word has length 1359 [2024-12-01 22:59:55,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-01 22:59:55,554 INFO L225 Difference]: With dead ends: 436 [2024-12-01 22:59:55,554 INFO L226 Difference]: Without dead ends: 213 [2024-12-01 22:59:55,556 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2763 GetRequests, 2700 SyntacticMatches, 11 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=444, Invalid=2418, Unknown=0, NotChecked=0, Total=2862 [2024-12-01 22:59:55,556 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 106 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-01 22:59:55,556 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 414 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-01 22:59:55,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2024-12-01 22:59:55,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 192. [2024-12-01 22:59:55,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 133 states have (on average 1.0676691729323309) internal successors, (142), 129 states have internal predecessors, (142), 35 states have call successors, (35), 24 states have call predecessors, (35), 23 states have return successors, (114), 38 states have call predecessors, (114), 35 states have call successors, (114) [2024-12-01 22:59:55,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 291 transitions. [2024-12-01 22:59:55,596 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 291 transitions. Word has length 1359 [2024-12-01 22:59:55,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-01 22:59:55,596 INFO L471 AbstractCegarLoop]: Abstraction has 192 states and 291 transitions. [2024-12-01 22:59:55,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.7666666666666666) internal successors, (113), 30 states have internal predecessors, (113), 22 states have call successors, (35), 2 states have call predecessors, (35), 12 states have return successors, (42), 15 states have call predecessors, (42), 22 states have call successors, (42) [2024-12-01 22:59:55,596 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 291 transitions. [2024-12-01 22:59:55,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1578 [2024-12-01 22:59:55,607 INFO L210 NwaCegarLoop]: Found error trace [2024-12-01 22:59:55,607 INFO L218 NwaCegarLoop]: trace histogram [118, 118, 113, 113, 95, 92, 59, 59, 59, 59, 59, 59, 59, 56, 56, 56, 56, 56, 56, 56, 39, 33, 23, 21, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 22:59:55,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-12-01 22:59:55,807 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 22:59:55,808 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-01 22:59:55,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 22:59:55,808 INFO L85 PathProgramCache]: Analyzing trace with hash -2065507241, now seen corresponding path program 12 times [2024-12-01 22:59:55,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 22:59:55,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399212208] [2024-12-01 22:59:55,808 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-01 22:59:55,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 22:59:55,874 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2024-12-01 22:59:55,874 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 22:59:56,351 INFO L134 CoverageAnalysis]: Checked inductivity of 74579 backedges. 1493 proven. 4619 refuted. 0 times theorem prover too weak. 68467 trivial. 0 not checked. [2024-12-01 22:59:56,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 22:59:56,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399212208] [2024-12-01 22:59:56,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399212208] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 22:59:56,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951654497] [2024-12-01 22:59:56,351 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-01 22:59:56,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 22:59:56,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 22:59:56,353 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 22:59:56,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-12-01 22:59:56,778 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2024-12-01 22:59:56,779 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 22:59:56,782 INFO L256 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-12-01 22:59:56,790 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 22:59:56,884 INFO L134 CoverageAnalysis]: Checked inductivity of 74579 backedges. 1493 proven. 4619 refuted. 0 times theorem prover too weak. 68467 trivial. 0 not checked. [2024-12-01 22:59:56,884 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 23:00:03,308 INFO L134 CoverageAnalysis]: Checked inductivity of 74579 backedges. 1497 proven. 4669 refuted. 0 times theorem prover too weak. 68413 trivial. 0 not checked. [2024-12-01 23:00:03,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951654497] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 23:00:03,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 23:00:03,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 23] total 26 [2024-12-01 23:00:03,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850566244] [2024-12-01 23:00:03,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 23:00:03,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-12-01 23:00:03,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 23:00:03,310 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-12-01 23:00:03,311 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2024-12-01 23:00:03,311 INFO L87 Difference]: Start difference. First operand 192 states and 291 transitions. Second operand has 26 states, 24 states have (on average 3.625) internal successors, (87), 26 states have internal predecessors, (87), 21 states have call successors, (27), 1 states have call predecessors, (27), 11 states have return successors, (34), 14 states have call predecessors, (34), 21 states have call successors, (34) [2024-12-01 23:00:03,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-01 23:00:03,578 INFO L93 Difference]: Finished difference Result 227 states and 393 transitions. [2024-12-01 23:00:03,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-12-01 23:00:03,578 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 3.625) internal successors, (87), 26 states have internal predecessors, (87), 21 states have call successors, (27), 1 states have call predecessors, (27), 11 states have return successors, (34), 14 states have call predecessors, (34), 21 states have call successors, (34) Word has length 1577 [2024-12-01 23:00:03,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-01 23:00:03,582 INFO L225 Difference]: With dead ends: 227 [2024-12-01 23:00:03,582 INFO L226 Difference]: Without dead ends: 223 [2024-12-01 23:00:03,582 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3184 GetRequests, 3141 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=223, Invalid=967, Unknown=0, NotChecked=0, Total=1190 [2024-12-01 23:00:03,582 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 81 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-01 23:00:03,583 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 231 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-01 23:00:03,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-12-01 23:00:03,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 202. [2024-12-01 23:00:03,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 139 states have (on average 1.064748201438849) internal successors, (148), 135 states have internal predecessors, (148), 37 states have call successors, (37), 24 states have call predecessors, (37), 25 states have return successors, (132), 42 states have call predecessors, (132), 37 states have call successors, (132) [2024-12-01 23:00:03,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 317 transitions. [2024-12-01 23:00:03,605 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 317 transitions. Word has length 1577 [2024-12-01 23:00:03,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-01 23:00:03,606 INFO L471 AbstractCegarLoop]: Abstraction has 202 states and 317 transitions. [2024-12-01 23:00:03,607 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 3.625) internal successors, (87), 26 states have internal predecessors, (87), 21 states have call successors, (27), 1 states have call predecessors, (27), 11 states have return successors, (34), 14 states have call predecessors, (34), 21 states have call successors, (34) [2024-12-01 23:00:03,607 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 317 transitions. [2024-12-01 23:00:03,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1952 [2024-12-01 23:00:03,636 INFO L210 NwaCegarLoop]: Found error trace [2024-12-01 23:00:03,637 INFO L218 NwaCegarLoop]: trace histogram [148, 148, 137, 137, 121, 116, 74, 74, 74, 74, 74, 74, 74, 68, 68, 68, 68, 68, 68, 68, 48, 47, 32, 16, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 23:00:03,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-12-01 23:00:03,837 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 23:00:03,837 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-01 23:00:03,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 23:00:03,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1664357384, now seen corresponding path program 13 times [2024-12-01 23:00:03,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 23:00:03,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840266914] [2024-12-01 23:00:03,838 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-01 23:00:03,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 23:00:04,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 23:00:07,471 INFO L134 CoverageAnalysis]: Checked inductivity of 114622 backedges. 1159 proven. 5789 refuted. 0 times theorem prover too weak. 107674 trivial. 0 not checked. [2024-12-01 23:00:07,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 23:00:07,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840266914] [2024-12-01 23:00:07,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840266914] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 23:00:07,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475516480] [2024-12-01 23:00:07,472 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-01 23:00:07,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 23:00:07,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 23:00:07,474 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 23:00:07,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-12-01 23:00:08,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 23:00:08,130 INFO L256 TraceCheckSpWp]: Trace formula consists of 4349 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-12-01 23:00:08,143 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 23:00:08,302 INFO L134 CoverageAnalysis]: Checked inductivity of 114622 backedges. 907 proven. 7591 refuted. 0 times theorem prover too weak. 106124 trivial. 0 not checked. [2024-12-01 23:00:08,302 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 23:00:16,886 INFO L134 CoverageAnalysis]: Checked inductivity of 114622 backedges. 907 proven. 7661 refuted. 0 times theorem prover too weak. 106054 trivial. 0 not checked. [2024-12-01 23:00:16,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475516480] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 23:00:16,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 23:00:16,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 25] total 33 [2024-12-01 23:00:16,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223869908] [2024-12-01 23:00:16,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 23:00:16,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-12-01 23:00:16,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 23:00:16,888 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-12-01 23:00:16,889 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2024-12-01 23:00:16,889 INFO L87 Difference]: Start difference. First operand 202 states and 317 transitions. Second operand has 33 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 33 states have internal predecessors, (108), 29 states have call successors, (33), 1 states have call predecessors, (33), 17 states have return successors, (47), 18 states have call predecessors, (47), 29 states have call successors, (47) [2024-12-01 23:00:17,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-01 23:00:17,307 INFO L93 Difference]: Finished difference Result 260 states and 547 transitions. [2024-12-01 23:00:17,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-12-01 23:00:17,308 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 33 states have internal predecessors, (108), 29 states have call successors, (33), 1 states have call predecessors, (33), 17 states have return successors, (47), 18 states have call predecessors, (47), 29 states have call successors, (47) Word has length 1951 [2024-12-01 23:00:17,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-01 23:00:17,315 INFO L225 Difference]: With dead ends: 260 [2024-12-01 23:00:17,315 INFO L226 Difference]: Without dead ends: 256 [2024-12-01 23:00:17,316 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3936 GetRequests, 3879 SyntacticMatches, 11 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=418, Invalid=1838, Unknown=0, NotChecked=0, Total=2256 [2024-12-01 23:00:17,317 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 114 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-01 23:00:17,317 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 259 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-01 23:00:17,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2024-12-01 23:00:17,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 202. [2024-12-01 23:00:17,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 139 states have (on average 1.064748201438849) internal successors, (148), 135 states have internal predecessors, (148), 37 states have call successors, (37), 24 states have call predecessors, (37), 25 states have return successors, (141), 42 states have call predecessors, (141), 37 states have call successors, (141) [2024-12-01 23:00:17,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 326 transitions. [2024-12-01 23:00:17,351 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 326 transitions. Word has length 1951 [2024-12-01 23:00:17,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-01 23:00:17,353 INFO L471 AbstractCegarLoop]: Abstraction has 202 states and 326 transitions. [2024-12-01 23:00:17,353 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 33 states have internal predecessors, (108), 29 states have call successors, (33), 1 states have call predecessors, (33), 17 states have return successors, (47), 18 states have call predecessors, (47), 29 states have call successors, (47) [2024-12-01 23:00:17,353 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 326 transitions. [2024-12-01 23:00:17,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4440 [2024-12-01 23:00:17,451 INFO L210 NwaCegarLoop]: Found error trace [2024-12-01 23:00:17,451 INFO L218 NwaCegarLoop]: trace histogram [326, 326, 325, 325, 270, 259, 163, 163, 163, 163, 163, 163, 163, 162, 162, 162, 162, 162, 162, 162, 108, 96, 66, 56, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 23:00:17,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-12-01 23:00:17,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 23:00:17,652 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-01 23:00:17,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 23:00:17,653 INFO L85 PathProgramCache]: Analyzing trace with hash 716088167, now seen corresponding path program 14 times [2024-12-01 23:00:17,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 23:00:17,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970867706] [2024-12-01 23:00:17,653 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-01 23:00:17,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 23:00:18,644 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-01 23:00:18,644 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 23:00:34,527 INFO L134 CoverageAnalysis]: Checked inductivity of 597202 backedges. 2512 proven. 15474 refuted. 0 times theorem prover too weak. 579216 trivial. 0 not checked. [2024-12-01 23:00:34,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 23:00:34,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970867706] [2024-12-01 23:00:34,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970867706] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 23:00:34,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109060842] [2024-12-01 23:00:34,528 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-01 23:00:34,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 23:00:34,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 23:00:34,529 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 23:00:34,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-12-01 23:00:35,938 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-01 23:00:35,938 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 23:00:35,965 INFO L256 TraceCheckSpWp]: Trace formula consists of 9874 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-12-01 23:00:35,993 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 23:00:36,199 INFO L134 CoverageAnalysis]: Checked inductivity of 597202 backedges. 2005 proven. 19642 refuted. 0 times theorem prover too weak. 575555 trivial. 0 not checked. [2024-12-01 23:00:36,199 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 23:00:52,557 INFO L134 CoverageAnalysis]: Checked inductivity of 597202 backedges. 2005 proven. 19727 refuted. 0 times theorem prover too weak. 575470 trivial. 0 not checked. [2024-12-01 23:00:52,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109060842] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 23:00:52,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 23:00:52,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 27] total 35 [2024-12-01 23:00:52,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925482954] [2024-12-01 23:00:52,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 23:00:52,560 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-12-01 23:00:52,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 23:00:52,561 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-12-01 23:00:52,561 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2024-12-01 23:00:52,561 INFO L87 Difference]: Start difference. First operand 202 states and 326 transitions. Second operand has 35 states, 33 states have (on average 3.4545454545454546) internal successors, (114), 35 states have internal predecessors, (114), 31 states have call successors, (35), 1 states have call predecessors, (35), 18 states have return successors, (50), 19 states have call predecessors, (50), 31 states have call successors, (50) [2024-12-01 23:00:53,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-01 23:00:53,019 INFO L93 Difference]: Finished difference Result 288 states and 720 transitions. [2024-12-01 23:00:53,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-12-01 23:00:53,019 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 3.4545454545454546) internal successors, (114), 35 states have internal predecessors, (114), 31 states have call successors, (35), 1 states have call predecessors, (35), 18 states have return successors, (50), 19 states have call predecessors, (50), 31 states have call successors, (50) Word has length 4439 [2024-12-01 23:00:53,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-01 23:00:53,031 INFO L225 Difference]: With dead ends: 288 [2024-12-01 23:00:53,031 INFO L226 Difference]: Without dead ends: 284 [2024-12-01 23:00:53,033 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8915 GetRequests, 8854 SyntacticMatches, 12 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=469, Invalid=2081, Unknown=0, NotChecked=0, Total=2550 [2024-12-01 23:00:53,035 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 190 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-01 23:00:53,035 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 278 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-01 23:00:53,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2024-12-01 23:00:53,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 217. [2024-12-01 23:00:53,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 148 states have (on average 1.0608108108108107) internal successors, (157), 144 states have internal predecessors, (157), 40 states have call successors, (40), 24 states have call predecessors, (40), 28 states have return successors, (178), 48 states have call predecessors, (178), 40 states have call successors, (178) [2024-12-01 23:00:53,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 375 transitions. [2024-12-01 23:00:53,083 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 375 transitions. Word has length 4439 [2024-12-01 23:00:53,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-01 23:00:53,086 INFO L471 AbstractCegarLoop]: Abstraction has 217 states and 375 transitions. [2024-12-01 23:00:53,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 3.4545454545454546) internal successors, (114), 35 states have internal predecessors, (114), 31 states have call successors, (35), 1 states have call predecessors, (35), 18 states have return successors, (50), 19 states have call predecessors, (50), 31 states have call successors, (50) [2024-12-01 23:00:53,086 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 375 transitions. [2024-12-01 23:00:53,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6203 [2024-12-01 23:00:53,314 INFO L210 NwaCegarLoop]: Found error trace [2024-12-01 23:00:53,315 INFO L218 NwaCegarLoop]: trace histogram [460, 460, 443, 443, 404, 376, 230, 230, 230, 230, 230, 230, 230, 221, 221, 221, 221, 221, 221, 221, 174, 155, 84, 39, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 23:00:53,334 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-12-01 23:00:53,516 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 23:00:53,516 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-01 23:00:53,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 23:00:53,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1359596429, now seen corresponding path program 15 times [2024-12-01 23:00:53,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 23:00:53,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481738491] [2024-12-01 23:00:53,518 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-01 23:00:53,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 23:00:53,642 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-12-01 23:00:53,642 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 23:00:53,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1168378 backedges. 13963 proven. 177 refuted. 0 times theorem prover too weak. 1154238 trivial. 0 not checked. [2024-12-01 23:00:53,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 23:00:53,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481738491] [2024-12-01 23:00:53,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481738491] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 23:00:53,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025708363] [2024-12-01 23:00:53,726 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-01 23:00:53,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 23:00:53,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 23:00:53,728 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 23:00:53,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-12-01 23:00:54,507 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-12-01 23:00:54,507 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 23:00:54,512 INFO L256 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-12-01 23:00:54,546 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 23:00:54,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1168378 backedges. 60171 proven. 4 refuted. 0 times theorem prover too weak. 1108203 trivial. 0 not checked. [2024-12-01 23:00:54,767 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 23:01:10,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1168378 backedges. 13963 proven. 177 refuted. 0 times theorem prover too weak. 1154238 trivial. 0 not checked. [2024-12-01 23:01:10,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025708363] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 23:01:10,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 23:01:10,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2024-12-01 23:01:10,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711224934] [2024-12-01 23:01:10,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 23:01:10,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-12-01 23:01:10,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 23:01:10,826 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-12-01 23:01:10,827 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-12-01 23:01:10,827 INFO L87 Difference]: Start difference. First operand 217 states and 375 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2024-12-01 23:01:10,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-01 23:01:10,911 INFO L93 Difference]: Finished difference Result 424 states and 884 transitions. [2024-12-01 23:01:10,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-01 23:01:10,912 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 6202 [2024-12-01 23:01:10,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-01 23:01:10,915 INFO L225 Difference]: With dead ends: 424 [2024-12-01 23:01:10,915 INFO L226 Difference]: Without dead ends: 216 [2024-12-01 23:01:10,917 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12414 GetRequests, 12399 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2024-12-01 23:01:10,918 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 24 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-01 23:01:10,918 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 104 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-01 23:01:10,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2024-12-01 23:01:10,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2024-12-01 23:01:10,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 148 states have (on average 1.0608108108108107) internal successors, (157), 143 states have internal predecessors, (157), 40 states have call successors, (40), 25 states have call predecessors, (40), 27 states have return successors, (172), 47 states have call predecessors, (172), 40 states have call successors, (172) [2024-12-01 23:01:10,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 369 transitions. [2024-12-01 23:01:10,951 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 369 transitions. Word has length 6202 [2024-12-01 23:01:10,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-01 23:01:10,952 INFO L471 AbstractCegarLoop]: Abstraction has 216 states and 369 transitions. [2024-12-01 23:01:10,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2024-12-01 23:01:10,952 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 369 transitions. [2024-12-01 23:01:11,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9976 [2024-12-01 23:01:11,486 INFO L210 NwaCegarLoop]: Found error trace [2024-12-01 23:01:11,488 INFO L218 NwaCegarLoop]: trace histogram [762, 762, 701, 701, 620, 573, 381, 381, 381, 381, 381, 381, 381, 350, 350, 350, 350, 350, 350, 350, 270, 192, 142, 128, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 23:01:11,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-12-01 23:01:11,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 23:01:11,688 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-01 23:01:11,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 23:01:11,690 INFO L85 PathProgramCache]: Analyzing trace with hash 75921981, now seen corresponding path program 16 times [2024-12-01 23:01:11,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 23:01:11,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733476404] [2024-12-01 23:01:11,691 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-01 23:01:11,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 23:01:16,139 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-01 23:01:16,139 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 23:02:35,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3030792 backedges. 23255 proven. 37029 refuted. 0 times theorem prover too weak. 2970508 trivial. 0 not checked. [2024-12-01 23:02:35,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 23:02:35,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733476404] [2024-12-01 23:02:35,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733476404] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 23:02:35,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247298866] [2024-12-01 23:02:35,452 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-01 23:02:35,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 23:02:35,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 23:02:35,454 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 23:02:35,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-12-01 23:02:37,654 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-01 23:02:37,654 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 23:02:37,707 INFO L256 TraceCheckSpWp]: Trace formula consists of 17752 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-12-01 23:02:37,764 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 23:02:38,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3030792 backedges. 99816 proven. 176 refuted. 0 times theorem prover too weak. 2930800 trivial. 0 not checked. [2024-12-01 23:02:38,042 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 23:03:07,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3030792 backedges. 4777 proven. 46147 refuted. 0 times theorem prover too weak. 2979868 trivial. 0 not checked. [2024-12-01 23:03:07,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247298866] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 23:03:07,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 23:03:07,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 15, 19] total 38 [2024-12-01 23:03:07,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279057951] [2024-12-01 23:03:07,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 23:03:07,419 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-12-01 23:03:07,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 23:03:07,419 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-12-01 23:03:07,419 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1240, Unknown=0, NotChecked=0, Total=1406 [2024-12-01 23:03:07,420 INFO L87 Difference]: Start difference. First operand 216 states and 369 transitions. Second operand has 38 states, 38 states have (on average 3.473684210526316) internal successors, (132), 38 states have internal predecessors, (132), 27 states have call successors, (40), 2 states have call predecessors, (40), 21 states have return successors, (57), 24 states have call predecessors, (57), 27 states have call successors, (57) [2024-12-01 23:03:08,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-01 23:03:08,961 INFO L93 Difference]: Finished difference Result 574 states and 1413 transitions. [2024-12-01 23:03:08,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-12-01 23:03:08,961 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.473684210526316) internal successors, (132), 38 states have internal predecessors, (132), 27 states have call successors, (40), 2 states have call predecessors, (40), 21 states have return successors, (57), 24 states have call predecessors, (57), 27 states have call successors, (57) Word has length 9975 [2024-12-01 23:03:08,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-01 23:03:08,965 INFO L225 Difference]: With dead ends: 574 [2024-12-01 23:03:08,965 INFO L226 Difference]: Without dead ends: 356 [2024-12-01 23:03:08,968 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 20034 GetRequests, 19936 SyntacticMatches, 9 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2455 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1062, Invalid=7128, Unknown=0, NotChecked=0, Total=8190 [2024-12-01 23:03:08,968 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 146 mSDsluCounter, 1092 mSDsCounter, 0 mSdLazyCounter, 2360 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 1174 SdHoareTripleChecker+Invalid, 2495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 2360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-12-01 23:03:08,968 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 1174 Invalid, 2495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 2360 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-12-01 23:03:08,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2024-12-01 23:03:09,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 286. [2024-12-01 23:03:09,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 195 states have (on average 1.035897435897436) internal successors, (202), 191 states have internal predecessors, (202), 57 states have call successors, (57), 34 states have call predecessors, (57), 33 states have return successors, (270), 60 states have call predecessors, (270), 57 states have call successors, (270) [2024-12-01 23:03:09,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 529 transitions. [2024-12-01 23:03:09,012 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 529 transitions. Word has length 9975 [2024-12-01 23:03:09,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-01 23:03:09,013 INFO L471 AbstractCegarLoop]: Abstraction has 286 states and 529 transitions. [2024-12-01 23:03:09,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.473684210526316) internal successors, (132), 38 states have internal predecessors, (132), 27 states have call successors, (40), 2 states have call predecessors, (40), 21 states have return successors, (57), 24 states have call predecessors, (57), 27 states have call successors, (57) [2024-12-01 23:03:09,014 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 529 transitions. [2024-12-01 23:03:09,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8372 [2024-12-01 23:03:09,373 INFO L210 NwaCegarLoop]: Found error trace [2024-12-01 23:03:09,375 INFO L218 NwaCegarLoop]: trace histogram [634, 634, 595, 595, 497, 496, 317, 317, 317, 317, 317, 317, 317, 297, 297, 297, 297, 297, 297, 297, 199, 180, 138, 98, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 23:03:09,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-12-01 23:03:09,575 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 23:03:09,575 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-01 23:03:09,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 23:03:09,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1742086032, now seen corresponding path program 17 times [2024-12-01 23:03:09,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 23:03:09,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807304376] [2024-12-01 23:03:09,579 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-01 23:03:09,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 23:03:09,701 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2024-12-01 23:03:09,701 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 23:03:10,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2131688 backedges. 5988 proven. 41705 refuted. 0 times theorem prover too weak. 2083995 trivial. 0 not checked. [2024-12-01 23:03:10,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 23:03:10,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807304376] [2024-12-01 23:03:10,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807304376] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 23:03:10,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005377384] [2024-12-01 23:03:10,067 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-01 23:03:10,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 23:03:10,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 23:03:10,068 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 23:03:10,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-12-01 23:03:11,033 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2024-12-01 23:03:11,033 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 23:03:11,039 INFO L256 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-12-01 23:03:11,084 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 23:03:11,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2131688 backedges. 406054 proven. 889 refuted. 0 times theorem prover too weak. 1724745 trivial. 0 not checked. [2024-12-01 23:03:11,444 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 23:03:37,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2131688 backedges. 5974 proven. 41734 refuted. 0 times theorem prover too weak. 2083980 trivial. 0 not checked. [2024-12-01 23:03:37,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005377384] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 23:03:37,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 23:03:37,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 26] total 36 [2024-12-01 23:03:37,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914556320] [2024-12-01 23:03:37,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 23:03:37,272 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-12-01 23:03:37,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 23:03:37,272 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-12-01 23:03:37,273 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1104, Unknown=0, NotChecked=0, Total=1260 [2024-12-01 23:03:37,273 INFO L87 Difference]: Start difference. First operand 286 states and 529 transitions. Second operand has 36 states, 35 states have (on average 3.6) internal successors, (126), 36 states have internal predecessors, (126), 28 states have call successors, (38), 2 states have call predecessors, (38), 13 states have return successors, (47), 13 states have call predecessors, (47), 28 states have call successors, (47) [2024-12-01 23:03:37,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-01 23:03:37,994 INFO L93 Difference]: Finished difference Result 589 states and 1260 transitions. [2024-12-01 23:03:37,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-12-01 23:03:37,994 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.6) internal successors, (126), 36 states have internal predecessors, (126), 28 states have call successors, (38), 2 states have call predecessors, (38), 13 states have return successors, (47), 13 states have call predecessors, (47), 28 states have call successors, (47) Word has length 8371 [2024-12-01 23:03:37,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-01 23:03:37,998 INFO L225 Difference]: With dead ends: 589 [2024-12-01 23:03:37,998 INFO L226 Difference]: Without dead ends: 306 [2024-12-01 23:03:38,000 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 16792 GetRequests, 16721 SyntacticMatches, 12 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 954 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=3065, Unknown=0, NotChecked=0, Total=3660 [2024-12-01 23:03:38,000 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 144 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-12-01 23:03:38,000 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 591 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1012 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-12-01 23:03:38,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2024-12-01 23:03:38,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 268. [2024-12-01 23:03:38,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 182 states have (on average 1.032967032967033) internal successors, (188), 178 states have internal predecessors, (188), 52 states have call successors, (52), 30 states have call predecessors, (52), 33 states have return successors, (256), 59 states have call predecessors, (256), 52 states have call successors, (256) [2024-12-01 23:03:38,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 496 transitions. [2024-12-01 23:03:38,025 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 496 transitions. Word has length 8371 [2024-12-01 23:03:38,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-01 23:03:38,026 INFO L471 AbstractCegarLoop]: Abstraction has 268 states and 496 transitions. [2024-12-01 23:03:38,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.6) internal successors, (126), 36 states have internal predecessors, (126), 28 states have call successors, (38), 2 states have call predecessors, (38), 13 states have return successors, (47), 13 states have call predecessors, (47), 28 states have call successors, (47) [2024-12-01 23:03:38,026 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 496 transitions. [2024-12-01 23:03:39,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19254 [2024-12-01 23:03:39,583 INFO L210 NwaCegarLoop]: Found error trace [2024-12-01 23:03:39,585 INFO L218 NwaCegarLoop]: trace histogram [1418, 1418, 1409, 1409, 1153, 1134, 709, 709, 709, 709, 709, 709, 709, 704, 704, 704, 704, 704, 704, 704, 444, 430, 284, 256, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 23:03:39,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-12-01 23:03:39,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 23:03:39,786 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-01 23:03:39,788 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 23:03:39,790 INFO L85 PathProgramCache]: Analyzing trace with hash 672898889, now seen corresponding path program 18 times [2024-12-01 23:03:39,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 23:03:39,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713694476] [2024-12-01 23:03:39,790 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-01 23:03:39,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 23:03:40,154 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2024-12-01 23:03:40,154 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 23:03:41,910 INFO L134 CoverageAnalysis]: Checked inductivity of 11286663 backedges. 15248 proven. 112094 refuted. 0 times theorem prover too weak. 11159321 trivial. 0 not checked. [2024-12-01 23:03:41,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 23:03:41,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713694476] [2024-12-01 23:03:41,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713694476] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 23:03:41,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883204348] [2024-12-01 23:03:41,910 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-01 23:03:41,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 23:03:41,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 23:03:41,912 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 23:03:41,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-12-01 23:03:43,939 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2024-12-01 23:03:43,939 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 23:03:43,957 INFO L256 TraceCheckSpWp]: Trace formula consists of 1869 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-12-01 23:03:44,132 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 23:03:44,945 INFO L134 CoverageAnalysis]: Checked inductivity of 11286663 backedges. 1902088 proven. 1812 refuted. 0 times theorem prover too weak. 9382763 trivial. 0 not checked. [2024-12-01 23:03:44,946 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 23:04:46,961 INFO L134 CoverageAnalysis]: Checked inductivity of 11286663 backedges. 15241 proven. 112133 refuted. 0 times theorem prover too weak. 11159289 trivial. 0 not checked. [2024-12-01 23:04:46,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883204348] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 23:04:46,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 23:04:46,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 29] total 34 [2024-12-01 23:04:46,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911354330] [2024-12-01 23:04:46,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 23:04:46,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-12-01 23:04:46,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 23:04:46,970 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-12-01 23:04:46,970 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2024-12-01 23:04:46,970 INFO L87 Difference]: Start difference. First operand 268 states and 496 transitions. Second operand has 34 states, 34 states have (on average 3.823529411764706) internal successors, (130), 34 states have internal predecessors, (130), 29 states have call successors, (40), 2 states have call predecessors, (40), 15 states have return successors, (52), 16 states have call predecessors, (52), 29 states have call successors, (52) [2024-12-01 23:04:47,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-01 23:04:47,869 INFO L93 Difference]: Finished difference Result 572 states and 1361 transitions. [2024-12-01 23:04:47,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-12-01 23:04:47,869 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.823529411764706) internal successors, (130), 34 states have internal predecessors, (130), 29 states have call successors, (40), 2 states have call predecessors, (40), 15 states have return successors, (52), 16 states have call predecessors, (52), 29 states have call successors, (52) Word has length 19253 [2024-12-01 23:04:47,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-01 23:04:47,872 INFO L225 Difference]: With dead ends: 572 [2024-12-01 23:04:47,872 INFO L226 Difference]: Without dead ends: 302 [2024-12-01 23:04:47,875 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38563 GetRequests, 38487 SyntacticMatches, 14 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=608, Invalid=3424, Unknown=0, NotChecked=0, Total=4032 [2024-12-01 23:04:47,875 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 151 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 1325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-12-01 23:04:47,875 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 573 Invalid, 1325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 1157 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-12-01 23:04:47,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2024-12-01 23:04:47,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 271. [2024-12-01 23:04:47,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 185 states have (on average 1.0324324324324323) internal successors, (191), 181 states have internal predecessors, (191), 53 states have call successors, (53), 32 states have call predecessors, (53), 32 states have return successors, (266), 57 states have call predecessors, (266), 53 states have call successors, (266) [2024-12-01 23:04:47,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 510 transitions. [2024-12-01 23:04:47,914 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 510 transitions. Word has length 19253 [2024-12-01 23:04:47,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-01 23:04:47,915 INFO L471 AbstractCegarLoop]: Abstraction has 271 states and 510 transitions. [2024-12-01 23:04:47,915 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.823529411764706) internal successors, (130), 34 states have internal predecessors, (130), 29 states have call successors, (40), 2 states have call predecessors, (40), 15 states have return successors, (52), 16 states have call predecessors, (52), 29 states have call successors, (52) [2024-12-01 23:04:47,915 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 510 transitions. [2024-12-01 23:04:48,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9708 [2024-12-01 23:04:48,295 INFO L210 NwaCegarLoop]: Found error trace [2024-12-01 23:04:48,297 INFO L218 NwaCegarLoop]: trace histogram [720, 720, 705, 705, 579, 574, 360, 360, 360, 360, 360, 360, 360, 352, 352, 352, 352, 352, 352, 352, 222, 219, 146, 126, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 23:04:48,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-12-01 23:04:48,497 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 23:04:48,497 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-01 23:04:48,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 23:04:48,499 INFO L85 PathProgramCache]: Analyzing trace with hash -138142962, now seen corresponding path program 19 times [2024-12-01 23:04:48,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 23:04:48,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079444256] [2024-12-01 23:04:48,499 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-01 23:04:48,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 23:04:52,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 23:06:14,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2865366 backedges. 5361 proven. 38379 refuted. 0 times theorem prover too weak. 2821626 trivial. 0 not checked. [2024-12-01 23:06:14,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 23:06:14,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079444256] [2024-12-01 23:06:14,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079444256] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 23:06:14,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71861106] [2024-12-01 23:06:14,391 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-01 23:06:14,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 23:06:14,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 23:06:14,393 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 23:06:14,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-12-01 23:06:17,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 23:06:17,162 INFO L256 TraceCheckSpWp]: Trace formula consists of 21571 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-12-01 23:06:17,210 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 23:06:17,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2865366 backedges. 4849 proven. 47035 refuted. 0 times theorem prover too weak. 2813482 trivial. 0 not checked. [2024-12-01 23:06:17,553 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 23:06:52,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2865366 backedges. 4849 proven. 47137 refuted. 0 times theorem prover too weak. 2813380 trivial. 0 not checked. [2024-12-01 23:06:52,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71861106] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 23:06:52,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 23:06:52,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 29] total 38 [2024-12-01 23:06:52,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996137588] [2024-12-01 23:06:52,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 23:06:52,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-12-01 23:06:52,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 23:06:52,123 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-12-01 23:06:52,124 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1177, Unknown=0, NotChecked=0, Total=1406 [2024-12-01 23:06:52,124 INFO L87 Difference]: Start difference. First operand 271 states and 510 transitions. Second operand has 38 states, 36 states have (on average 3.4166666666666665) internal successors, (123), 38 states have internal predecessors, (123), 34 states have call successors, (38), 1 states have call predecessors, (38), 20 states have return successors, (55), 21 states have call predecessors, (55), 34 states have call successors, (55) [2024-12-01 23:06:52,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-01 23:06:52,572 INFO L93 Difference]: Finished difference Result 357 states and 1015 transitions. [2024-12-01 23:06:52,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-12-01 23:06:52,573 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 3.4166666666666665) internal successors, (123), 38 states have internal predecessors, (123), 34 states have call successors, (38), 1 states have call predecessors, (38), 20 states have return successors, (55), 21 states have call predecessors, (55), 34 states have call successors, (55) Word has length 9707 [2024-12-01 23:06:52,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-01 23:06:52,582 INFO L225 Difference]: With dead ends: 357 [2024-12-01 23:06:52,582 INFO L226 Difference]: Without dead ends: 353 [2024-12-01 23:06:52,583 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 19455 GetRequests, 19388 SyntacticMatches, 13 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=562, Invalid=2518, Unknown=0, NotChecked=0, Total=3080 [2024-12-01 23:06:52,584 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 94 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-01 23:06:52,584 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 308 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-01 23:06:52,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2024-12-01 23:06:52,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 276. [2024-12-01 23:06:52,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 188 states have (on average 1.0319148936170213) internal successors, (194), 184 states have internal predecessors, (194), 54 states have call successors, (54), 32 states have call predecessors, (54), 33 states have return successors, (285), 59 states have call predecessors, (285), 54 states have call successors, (285) [2024-12-01 23:06:52,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 533 transitions. [2024-12-01 23:06:52,616 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 533 transitions. Word has length 9707 [2024-12-01 23:06:52,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-01 23:06:52,619 INFO L471 AbstractCegarLoop]: Abstraction has 276 states and 533 transitions. [2024-12-01 23:06:52,619 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 3.4166666666666665) internal successors, (123), 38 states have internal predecessors, (123), 34 states have call successors, (38), 1 states have call predecessors, (38), 20 states have return successors, (55), 21 states have call predecessors, (55), 34 states have call successors, (55) [2024-12-01 23:06:52,619 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 533 transitions. [2024-12-01 23:06:54,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21202 [2024-12-01 23:06:54,953 INFO L210 NwaCegarLoop]: Found error trace [2024-12-01 23:06:54,955 INFO L218 NwaCegarLoop]: trace histogram [1558, 1558, 1555, 1555, 1267, 1252, 779, 779, 779, 779, 779, 779, 779, 777, 777, 777, 777, 777, 777, 777, 488, 475, 306, 288, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 23:06:54,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-12-01 23:06:55,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c31a9d0-744f-4b2d-b421-23392acc727a/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 23:06:55,155 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-01 23:06:55,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 23:06:55,158 INFO L85 PathProgramCache]: Analyzing trace with hash 363046010, now seen corresponding path program 20 times [2024-12-01 23:06:55,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 23:06:55,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369563179] [2024-12-01 23:06:55,159 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-01 23:06:55,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 23:07:17,354 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-01 23:07:17,354 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat